Rolls-Royce Archives

Rolls-Royce Experimental Archives: Box ExFiles\Box 121\2\        Box Selection

IdentifierEntry
scan0001 Letter from S. Wolf & Co. Ltd. (Solex) regarding a requested catalogue for their carburettor.
View original record X3603 Telegraphic Address:- WIDERSTAND, PHONE, LONDON A.B.C. CODE 5TH Edition Solex The NO-TROUBLE Carburetter COVENTRY:- 6, WARWICK ROW. TELEPHONE 426 COVENTRY. GR/MP S.WOLF & Co. Ltd., 115,…

scan0002 Letter from S. Wolf & Co Ltd proposing a 35m/m Horizontal Solex Carburettor for a three-litre engine.
View original record X3603 Telegraphic Address:- WIDERSTAND,PHONE,LONDON A.B.C.Code 5TH Edition Solex The NO-TROUBLE Carburetter Telephone Nos 5172 CENTRAL 2734 HOP. SOCIETY OF MOTOR MANUFACTURERS & TRADERS S.WOLF & Co…

scan0003 Letter from S. Wolf & Co Ltd regarding sending a drawing for a suitable 'Solex' carburettor.
View original record Telegraphic Address: WOLF, COVENTRY. A.B.C. Code. 5th Edition. Solex The NO-TROUBLE Carburetter Telephone No.: 426 COVENTRY. THE SOCIETY OF MOTOR MANUFACTURERS & TRADERS S.WOLF & CO LTD 6 Warwick Row,…

scan0004 Letter from Solex Ltd. to Colonel Fell enquiring about the possibility of testing their 'Solex' carburettors at Derby.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0005 Letter addressed to Colonel Fell regarding the principles and benefits of the 'Solex' carburettor.
View original record -2- Colonel Fell, D.S.O. 31st March, 1928. embodies principles that are quite a departure from those employed in the earlier type with which you are familiar. We can for instance produce a practically…

scan0006 Page 2 of a letter addressed to Colonel Fell, D.S.C., discussing a test and arranging a meeting in Derby.
View original record -2- Colonel Fell, D.S.C. 31st March, 1928. of such a test, please let me hear from you and I will immediately come up to Derby and talk it over with you. I trust that both Mrs. Fell and yourself are…

scan0007 Forwarding an offer from the Solex Company to loan a carburettor for testing, with a warning about exaggerated claims.
View original record X3603 To R. from Fl. Fl.4/Av/D3.4.23. Attached please find a copy of a letter received from Mr. Mantell, who is the London Manager of the Solex Company. He writes to me because he was at one time one…

scan0008 Letter to L. Mantell of Solex Ltd., acknowledging his correspondence and advising it has been passed to Mr. Royce.
View original record FL.3/AV/DS.4.28. 3rd April 1928. L. Mantell, Esq., c/o Messrs. Solex Ltd., 223-231, Marylebone Road, N.W. 1. Dear Mantell, Many thanks for your letter of the 31st March, reference LM/AMF. which I am…

scan0009 Letter from Solex Ltd. to Colonel Fell regarding a business matter and his assistance.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams: SOLEXCARB BAKER LONDON Telephones: PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0010 Offer from Solex to provide a set of their carburettors for testing.
View original record HS. FROM R. C. to - BJ. " BY. " FL. ORIGINAL *3603 R3/M26.4.28. SOLEX CARBURETTERS. X3603 The Solex people have offered to send us a set of their carburetters to test. This make of instrument is used…

scan0011 Offer from Solex to provide a set of their carburetters for testing.
View original record Hs. from R. c. to BJ. BY. FL. X3603 R3/M28.4.28 SOLEX CARBURETTERS. X.3603 X.4214 The Solex people have offered to send us a set of their carburetters to test. This make of instrument is used on the…

scan0012 Letter to Solex Ltd. expressing interest in testing their carburetter on a 40/50 HP engine and providing its specifications.
View original record X 3603 Expl: Dept: HS/ACLL/LG. 3rd. May 1928. L. Mantell Esq., Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sir, We have received through Colonel Fell your letter to him ref. L/AFM.…

scan0013 Letter from Solex Ltd. discussing their carburettor capabilities and proposing a demonstration.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/AC…

scan0014 Letter from Solex Ltd. to Messrs. Rolls Royce Ltd. regarding a demonstration of an instrument.
View original record Messrs. Rolls Royce Ltd. 5th May 1928. -2- Meanwhile I would like to say that the instrument I propose to bring for your inspection is one embodying principles which are not included in our…

scan0015 Letter to Solex Ltd. regarding arranging a convenient day for a visit.
View original record /3603 Hsl/LG. 7th. May 1928. Messrs. Solex Ltd., Solex Works, 223-231 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of L. Mantell Esq., Thank you for your letter of the 5th.inst. Any day…

scan0016 Letter from Solex Ltd. concerning suggestions for exhaust and induction pipe design for a 40/50 HP car.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON' Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0017 Page 2 of a letter from Solex Ltd. discussing a carburettor and arranging a road and bench test.
View original record Messrs. Rolls Royce Ltd. 11th May 1928. -2- carburettor of a type that will, we think, answer your purpose, and we will write you further at a later date, when we trust that an appointment can be made…

scan0018 Letter to Messrs. Solex Ltd. enclosing blueprints for the Phantom and 20 HP. Cylinder head.
View original record Y3603 Hsl/LG. Expl: Dept: 12th. May 1928. Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, We attach herewith blueprints of the Phantom and 20 HP. Cylinder head as promised. Yours…

scan0019 Letter from Solex Ltd. regarding Blue Prints of the Phantom and 20 HP Cylinder Head.
View original record X3603. SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hsl/LG…

scan0020 Letter from Solex Ltd. discussing the preliminary testing of their carburettors on the 20 HP and Phantom engines.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0021 Letter from Solex Ltd. discussing bench tests, road tests, and engine characteristics.
View original record Messrs. Rolls Royce Ltd. 5th June 1928. -2- We would esteem it a great favour if you would permit us to carry this out on the bench and if results at that stage warrant it, possibly a short…

scan0022 Letter from the Experimental Department to Solex Ltd. arranging a test for a 20 HP engine unit.
View original record 43603 Hs4/LG. Expl: Dept: 7th. June 1928. Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, Replying to your letter of the 5th. inst. We should be pleased to arranged for a test to…

scan0023 Letter from Solex Ltd. arranging a test with a Solex Carburettor on a 20 HP engine unit.
View original record Y3603 SOLEX LTD. Director GORDON RICHARDS SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs4/LG OUR…

scan0024 Letter from carburettor manufacturer Solex Ltd. confirming comparative bench tests against a factory model on a 20 HP engine and proposing a road test.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0025 The second and final page of a letter from Solex Ltd.
View original record Messrs. Rolls Royce Ltd. 14th June 1928. -2- indications on the bench. Meanwhile, assuring you of our best attention, We are, Yours faithfully, FOR SOLEX LTD., J Mantell Enc.

scan0026 Letter from Solex Ltd. regarding carburettor bench tests and a proposed road test.
View original record x3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON' Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0027 Performance report on a Solex carburetter fitted to a 20 HP car, detailing issues with slow running and throttle response.
View original record X3603 Expl: Dept: Hs5/LG. 21st. June 1928. Messrs. The Solex Carb. Co., Solex Works, 223-231 Marylebone Rd., London N.W.1. Dear Sirs, The 20 HP. RR. car fitted with the Solex Carburetter is now…

scan0028 Letter from Solex Ltd. discussing carburettor performance on bench vs. road tests.
View original record Y3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs5/LG OUR…

scan0029 Letter from Solex Ltd. discussing carburettor performance, the difference between road and bench tuning, and postponing a visit.
View original record Messrs. Rolls-Royce Ltd. 25th June 1928. -2- possible by a general volumetric reduction to increase the 500 r.p.m. H.P. by 5% while only reducing the 2750 r.p.m. end by 2%. We only mention this to…

scan0030 Letter from Solex Ltd. regarding a carburettor ready for road testing on a 20 HP car.
View original record Y3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0031 Letter to Solex Ltd. urging them to complete their tests on a car and confirming a telegram was sent.
View original record Y3603 Expl: Dept: 10th. July 1928. Hs/Rml/LG. Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of L. Mantell. 9th.inst. We thank you for your letter of the We…

scan0032 Post Office telegram concerning the arrival of Mantell for a meeting with Mr Hives.
View original record POST OFFICE TELEGRAPHS. Telegrams for INLAND addresses may be handed to the messenger who delivers this form. The Post Office accepts telegrams by telephone. Office Stamp: DERBY R * 10 JY 28 No. 62 To…

scan0033 Letter from Solex Ltd. to Rolls Royce Ltd. confirming the visit of their Mr. Mantell for tests.
View original record x3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rm/1…

scan0034 Letter from Solex Ltd. regarding carburettor tests and drawings for an induction system on a 40/50 hp engine.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB 'BAKER' 'LONDON' Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR…

scan0035 Letter to Solex Ltd. arranging a meeting with Mr. Mantell and their Research Department.
View original record V3603 Expl: Dept: Hs/Rm2/LG. 17th. Aug. 1928. Messrs. Solex Ltd., Solex Works, 223-231 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of Mr. Mantell. With reference to your letter of the…

scan0036 Letter from Solex Ltd. arranging a visit to the works by their Chief of Research.
View original record x3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rm/2…

scan0037 Letter to Solex Ltd. arranging a meeting for the coming Wednesday.
View original record A3603 HS/Rn7/LG. Expl: Dept: 20th. Aug. 1928. Messrs. Solex Ltd. 223-231 Marylebone Rd., London N.W.1. Dear Sirs, With reference to your letter of the 18th. inst. We should be pleased to see you on…

scan0038 Letter from Solex Ltd. regarding an induction pipe drawing and a new carburettor design for a 40 HP engine.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams 'SOLEXCARB BAKER LONDON' Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF. GR/GR…

scan0039 Letter to The Solex Works asking for an expected completion date for carburettors.
View original record Y3603 Hs/Rm17/LG. 17th. Oct. 1928. Messrs. The Solex Works, 223-231 Marylebone Rd., London N.W.1. Dear Sirs, FOR THE ATTENTION OF MR. MANTELL. Will you please let us know when you expect to have the…

scan0040 Confirming the need to finish Solex induction pipes in order to test their carburetters.
View original record To RHC. from Hs/Rm. X3603 Hs/Rm16/LG17.10.28. This is to confirm that you will endeavour to get the Solex induction pipes finished so that we can test out their carburetters. Hs/Rm.

scan0041 Letter from carburettor manufacturer Solex Ltd. acknowledging receipt of an order.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rm17…

scan0042 Letter to Solex Ltd. chasing the delivery of carburettors for a 40/50 HP car.
View original record Y 3603 Hs/Rm5/LG24th. Expl: Dept: 24th. Oct. 1928. Messrs. Solex Ltd., Solex Works, 223-231 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of Mr. Mantell. With reference to the…

scan0043 Letter from Solex Ltd. regarding a delay in the delivery of carburettors promised for testing.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF.…

scan0044 Letter from Solex Ltd. regarding a special carburettor for the Phantom engine and arrangements for bench testing.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF. IM/GR…

scan0045 Letter from Solex Ltd. concerning a special jet system.
View original record Messrs. Rolls Royce Ltd. 29th October 1928. -2- with the special jet system that is now being prepared to handle your road requirements and for the completion of which certain bench characteristics…

scan0046 Letter to The Solex Carb. Co. Ltd. requesting carburettors for an engine test run.
View original record Y 3603 Expl: Dept: Hs/Rnl/LG. 2nd. Nov. 1928. Messrs. The Solex Carb. Co.Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of Mr. Mantell. -----------------------------------…

scan0047 Letter from Solex Ltd. regarding a mishap and delay in dispatching a special Dual Carburettor for testing.
View original record 43603. SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0048 Letter from Solex Ltd. assuring their best attention.
View original record Messrs. Rolls Royce, Ltd. 2. 3.11.1928. Assuring you of our best attention at all times, We are, Yours faithfully, FOR SOLEX LTD., [Signature] Managing Director.

scan0049 Letter from Solex Ltd. regarding the dispatch of four special choke tubes.
View original record X3603 SOLEX LTD. Director - GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0050 Letter to The Solex Co. Ltd. confirming readiness of an engine and induction pipe for testing.
View original record X3603 [handwritten] Expl: Dept: HS/Hml/LG. 9th. Nov. 1928. Messrs. The Solex Co. Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of Mr. Mantell. With reference to your letter…

scan0051 Letter from Solex Ltd. acknowledging a previous letter and arranging a meeting for the following week.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 8620 x3603 YOUR REF.…

scan0052 Letter to Solex Carburetter Co. Ltd. outlining issues found during engine testing with their carburetters.
View original record X3603 Expl: Dept: Hs/Rm5/LG. 12th. Nov. 1928. Messrs. The Solex Carburetter Co.Ltd., 231-233 Marylebone Rd., London N.W.1. Dear Sirs, For the attention Mr. Mantell. We are now ready for a visit from…

scan0053 Letter from Solex Ltd. regarding the supply of parts for a Phantom engine bench test.
View original record Y3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0054 Letter from Solex Ltd. acknowledging a telegram postponing carburettor tests and awaiting a new date.
View original record X360S. SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0055 Letter to Solex Ltd. about postponing carburetter tests and scheduling a visit for Mr. Mantell.
View original record Y3603 Hs/Rml/LG. Expl: Dept. 23rd. Nov. 1928. Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of Mr. Mantell. We regret having to wire you to postpone the…

scan0056 Letter from Solex Ltd. acknowledging receipt of a letter and awaiting a telegram.
View original record +3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rml/LG.…

scan0057 Letter to Solex Ltd. arranging for Mr. Mantell to observe carburetter tests on a car.
View original record 43603 Expl: Dept: Hs/Rm4/LG. 26th. Nov. 1928. Messrs. Solex Ltd., 223-234 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of Mr. Mantell. We have today wired you as follows :- "IF POSSIBLE…

scan0058 Letter from Solex Ltd. arranging to assist the Experimental Department with carburettor road tests.
View original record SOLEX LTD. Director GORDON RICHARDS SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rm4/LG. OUR…

scan0059 Letter to Solex Ltd. advising they are ready for Mr. Mantell to attend carburetter tests.
View original record X3603 Hs/Rm4/LG. Expl: Dept: 28th. Nov. 1928. Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, CARBURETTER TESTS. We are pleased to advise you that we are now ready for Mr. Mantell…

scan0060 Letter from Solex Ltd. concerning carburettor testing and performance improvements.
View original record 43603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rm4/LG…

scan0061 Letter from Solex Ltd. regarding a special jet system and throttle curve tests.
View original record Messrs. Rolls Royce Ltd. 5th December 1928. -2- but beg to say that this is only a question of jet correction and as our Paris House is preparing a special jet system which no doubt they will bring…

scan0062 Letter to Solex Ltd. inviting Mr. Mantell to attend carburetter tests.
View original record Hs/Rm4/LG. Expl: Dept: 28th. Nov. 1928. Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, CARBURETTER TESTS. We are pleased to advise you that we are now ready for Mr. Mantell any…

scan0063 Letter from Solex Ltd. proposing to send a foreman to test a new jet system from their Paris Research Department.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF. IM/GR…

scan0064 Letter to Messrs. Solex Ltd. concerning the delay of a car test until after Christmas.
View original record Y-3603 Hs/Rm2/LG. Expl: Dept: 11th. Dec. 1928. Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of Mr. Mantell. With reference to your letter of the 10th.inst. We…

scan0065 Letter from Solex Ltd. arranging a road test for after Christmas, suggesting the 7th of the next month.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0066 The second page of a typed letter from Solex Ltd.
View original record Messrs. Rolls-Royce Ltd. 12th December 1928. -2- meanwhile, assuring you of our best attention, We are, Yours faithfully, FOR SOLEX LTD. Lmantell

scan0067 Letter from Solex Ltd. arranging a meeting with their French Engineer for the 7th of the next month.
View original record V3603. SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 OUR REF. IM/GR 18th…

scan0068 Letter to Solex Ltd. arranging to fit a carburetter and induction pipes to a car for testing.
View original record V3603 Hs/Rm2/LG. Expl: Dept. 19th. Dec. 1928. Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of Mr. Mantell. With reference to your letter of the 18th.inst. We…

scan0069 Letter from Solex Ltd. arranging a road test for a Solex carburettor on a new Phantom engine.
View original record +3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0070 Letter to Solex Ltd. regarding performance and consumption tests of their double-throat carburetter on a 40/50 HP engine.
View original record X3603 Expl: Dept: Hs/Rml/LG. 5th. Jan. 1929. Messrs. Solex Ltd., 223-231 Marylebone Rd., N.W.1. Dear Sirs, We are sending you herewith power curves of our 40/50 HP. engine taken with your double…

scan0071 Letter discussing carburetter modifications to address high petrol consumption.
View original record contd :- -2- We understand from your Mr. Mantell that you anticipate being able to make certain modifications to the carburetter which will enable us to use 34 mm. chokes, without any loss in snap…

scan0072 Graph of power curves for a Phantom engine with a Solex twin carburetter, comparing different choke sizes.
View original record POWER CURVES WITH SOLEX TWIN CARBURETTER ON PHANTOM. ONE CHOKE SUPPLIES THREE CYLINDERS 34 M/M CHOKE GIVES 1.055□" FREE AREA 32 M/M " " .893□" " " B.H.P ENG. R.P.M. SOLEX 34 M/M CHOKES SOLEX 32 M/M…

scan0073 Letter from Solex discussing carburettor tests and requested modifications for a 40/50 HP Phantom.
View original record Y3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0074 Letter from Solex Ltd. concerning carburettor modifications and comparative test readings.
View original record Messrs.Rolls Royce Ltd. 11th January 1929. -2- These modifications will immediately be put in hand and we will advise you at the earliest of their approximate date of completion. Meanwhile we…

scan0075 Letter from Solex Ltd. requesting specific comparative speed, acceleration, and consumption tests for different carburettor choke settings.
View original record A.J.L Y3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR…

scan0076 Letter discussing carburettor tests, focusing on the effects of centrifugal force on the float chamber during cornering.
View original record Messrs. Rolls Royce Ltd. -2- These two series of tests are stated to be most essential to enable them to plot out the jet correction curves and estimate the alterations necessary. 3. Could you also…

scan0077 The concluding page of a letter from Solex Ltd.
View original record - Messrs.Rolls Royce Ltd. 19th January 1929. -3- requirements. Meanwhile, assuring you of our best attention, We are, Yours faithfully, FOR SOLEX LTD., L Manchell

scan0078 Comparing expanding carburetters with static types from Solex, Stromberg and Zenith, with a view to developing the Phantom carb.
View original record To R. from Hs/ACL. c. to BJ. SG. c. to Wor. E. c. to BY. X3603 Hs/ACL1/LG23.1.29. 78050 CAR CARBURETTERS. At one time and another we have tested out various carburetters on our cars with the object of…

scan0079 Continued analysis of the advantages and disadvantages of a carburettor type, this being page 2.
View original record contd :- -2- (1) They give good power output due to the low depression at which they operate. The low speed full throttle power is usually good because here the depression is at a minimum. (2) Due to…

scan0080 Carburettor performance issues, including a diagram illustrating fuel delivery at small throttle openings.
View original record contd :- -3- The disadvantages enumerated above have been quite sufficient to prohibit the use of this type of instrument on our cars. Certainly there have been numerous adjuncts developed to attempt…

scan0081 Page describing engine stalling from sudden throttle opening and fuel supply issues, comparing car and aero engines.
View original record contd :- -4- If now the throttle is opened suddenly from this low speed we have a very different condition. The engine speed will not follow quickly the rapid opening of the throttle due to the…

scan0082 The operation of the Phantom carburetter, focusing on its low-speed and acceleration performance.
View original record contd :- -5- vigorously - or keeps pace better with the throttle opening - and a high velocity quickly results in the choke being sufficient to prevent a break down in the fuel supply like in the…

scan0083 Carburettor performance, comparing static types like the Twin Solex on the Phantom with other models.
View original record contd :- -5- that the latter carburetter has an air valve lifted by the engine suction should not appreciably slow down the acceleration of the car providing the damping of this valve is not excessive…

scan0084 Proposed carburettor design with a low speed choke and diffuser jets.
View original record contd :- -7- It has occurred to us that we might overcome these high depression troubles with consequently an increase of the power output, and still retain our good low speed and snap opening up…

scan0085 Page explaining carburetter depression and operation, with two illustrative diagrams.
View original record -8- contd :- valve reached its maximum lift, the depression in the high speed choke would however vary in exactly the same way as a static carburetter. The depression to operate the piston - which is…

scan0086 Carburetter design, including butterfly valves, suction pistons, and performance advantages.
View original record contd :- -9- chance of fuel deposition - could be employed. A butterfly valve operated by the piston would provide the means for obtaining the pressure difference across the slow running unit and…

scan0087 Carburetter design principles, specifically atomisation and acceleration.
View original record contd :- -10- (4) Good atomisation to assist distribution. (5) Economy because with diffuser type jet with accelerating well and suction valve it would not have to be set over rich to give…

scan0088 Letter from Solex Ltd. regarding modifications to a 34 m/m Choke Tube to address noise and improve performance.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rm1/ OUR REF.…

scan0089 Concluding page of a letter from Solex Ltd. regarding parts readiness.
View original record Messrs. Rolls Royce, Ltd. 2. 6.2.1929. day or so that the parts are ready. Meantime, assuring you that this matter is having our very careful attention, We are, Yours faithfully, FOR SOLEX LTD..…

scan0090 Successful trial of a Solex carburetter on a Phantom model.
View original record To R. from Hs. c. to SG. Wor. c. to E. BA. c. to BY. X3603 Hs2/LGT.2.29. SOLEX CARBURETTER. Some time ago you suggested we might get in touch with the Solex carburetter people to supply a carburetter…

scan0091 Solex carburetter tests conducted on a Phantom model.
View original record To R. from Hs/ACL. c. to SG. Wor. c. to E. DA. c. to BY. Hs/ACL1/LG7.2.29. SOLEX CARBURETTER TESTS ON PHANTOM. We have carried out some tests with a twin choke Solex carburetter fitted to a standard…

scan0092 Comparison of engine performance using different carburettor and induction systems.
View original record contd :- -2- horizontal distributing pipe (see appended print). Runs were made on the test bed with various chokes and diffusers and the power and B.M.E.P. obtained are shown on appended prints…

scan0093 Carburettor choke sizes and their impact on low-speed performance and torque.
View original record contd :- -3- When the carburetter was fitted to a chassis it was found necessary to remove the 34 mm. choke, due to the poor pick up from slow speeds, and replace it with the 32 mm. choke. This…

scan0094 Analysis of induction systems and carburettors, comparing fuel distribution and performance on various engines.
View original record contd :- -4- but we have not had experience with this on our cars and cannot say we like such a scheme. Very good distribution resulted with the induction system used and we have noticed that good…

scan0095 Advantages of the SS expanding carburettor and suggesting further development and comparative road tests.
View original record contd :- -5- working at a low induction depression and so obtaining such a marked gain in low speed torque. We certainly do not care for double carburetters from the point of view of extra…

scan0096 General performance report on the Solex double choke carburetter fitted to a 12-EX chassis.
View original record Hs/AJL/LG7.2.29. SOLEX CARBURETTER ON 12-EX. General Performance. The Solex double choke carburetter as fitted to 12-EX is the best static carburetter we have tested out on either of our chassis. The…

scan0097 Comparative test report on the performance of a Rolls Royce carburetter versus a Solex carburetter.
View original record contd :- -2- Either our carburetter uses an excessive amount of petrol during accelerations, or the Solex carb. is excessively strong at medium throttle positions. Starting from cold is very good,…

scan0098 Comparison of R.R. and Solex carburettor performance during hill climb tests.
View original record -2a (b) Ticknall Hill. R.R. Solex. Cutout Cutout Cutout Cutout closed. open. closed. open. Start - 10 m.p.h. 10 m.p.h. 10 m.p.h. 10 m.p.h. Speed at gate - 30 * 30.5 * 33.5 * 34 * Finish - 52 * 53 *…

scan0099 Comparative petrol consumption tests between a standard R.R. and a Solex carburettor.
View original record contd :- -3- Petrol consumption tests. A series of comparative petrol consumption tests were made at 10, 20, 30 and 40 m.p.h. with the following results : SPEED. R.R. Solex. M.P.H. M.P.G. M.P.G. 10 16…

scan0100 Graph comparing the acceleration performance of a Phantom (12EX) with a Solex and an RR carburetter.
View original record CAR SPEED (M.P.H.) TIME (SECS) PHANTOM ACCELERATION (12EX) SOLEX AND RR CARBURETTER SOLEX R.R. 5-2-29

scan0101 Graph comparing the B.M.E.P. of a Phantom engine using a Solex twin carburetter with different chokes against the standard Phantom carburetter.
View original record SOLEX TWIN CARBURETTER ON PHANTOM ENGINE B.M.E.P. WITH 34 M.M. AND 32 M.M. CHOKES. COMPARED WITH STD. PHANTOM CARBURETTER. 34 M.M. CHOKE GIVES 1.055 □" FREE AREA. 32 M.M. CHOKE GIVES .893 □" FREE…

scan0102 Blueprint of a Solex Diffuser Tube with dimensions.
View original record SOLEX DIFFUSER TUBE. .287 DIA .218 DIA 1.550 .700 .030 .750 4 HOLES .039 DIA 4 HOLES .050 DIA 2 HOLES .050 DIA 2 HOLES .050 DIA .115 DIA.

scan0103 Sectional diagram of a 'Solex' twin choke carburetter tested on a Standard Phantom.
View original record 40 M.M. DIA. AN IDLING MIXTURE DISCHARGE HOLE IS PROVIDED AT EACH SIDE OF THE THROTTLE. THEY ARE CONNECTED BY MEANS OF AN ANNULAR PASSAGE. IDLING FUEL JET ADJUSTING SCREW FOR IDLING AIR SUPPLY (AIR…

scan0104 Graph showing power curves for a Phantom engine with a Solex twin carburetter at different choke sizes.
View original record POWER CURVES WITH SOLEX TWIN CARBURETTER ON PHANTOM. ONE CHOKE SUPPLIES THREE CYLINDERS. 34 M/M CHOKE GIVES 1.055 SQ" FREE AREA 32 M/M " " .893 SQ" " " B.H.P. ENG. R.P.M. SOLEX 34 M.M. CHOKES. SOLEX…

scan0105 Blueprint of an induction system for a Phantom model, used for Solex carburettor experiments.
View original record INDUCTION SYSTEM ON PHANTOM USED FOR, "SOLEX" CARBURETTER EXPTS., HOT SPOT, 1.575 DIA., CARBURETTER FLANGE., 7 JUL 1929

scan0106 Letter from carburettor manufacturer Solex Ltd. discussing consumption readings and air/fuel proportions.
View original record X2603. SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF.…

scan0107 Technical report discussing factors affecting fuel consumption and carburettor performance at low speeds.
View original record Messrs. Rolls Royce Ltd. 23rd February 1929. -2- Secondly, the impression that some unobserved factor may have intruded is strengthened by noting that this difference occurs even at very low speeds…

scan0108 Page 3 of a letter from Solex Ltd. to Messrs. Rolls Royce Ltd. regarding comparative testing.
View original record Messrs.Rolls Royce Ltd. 23rd February 1929. -3- factors that may be in unobserved operation during one test and absent in the other, but with all conditions identical, the discrepancy is so profound…

scan0109 Letter to Solex Ltd. discussing carburetter test results, noting an over-rich mixture and power loss.
View original record X3603 Expl: Dept: Hs/Rm2/LG. 27th. Feb. 1929. Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of Mr. Mantell. With reference to your letter of the 23rd. inst. We…

scan0110 Letter from Solex Ltd. acknowledging receipt of correspondence and passing it to their Research Department.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rm2/LG.…

scan0111 Letter to Solex Ltd. arranging for Mr. Elliott to visit their works in Paris regarding modified carburetters.
View original record X3603 HS/RmL/LG. 9th. Mar. 1929. Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of Mr. Mantell. Our Mr. Elliott will be crossing over to France on Wednesday of…

scan0112 Letter from Solex Ltd. acknowledging correspondence and arranging a visit for Mr. Elliott to their Paris works.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. OUR REF. HG/MP…

scan0113 Letter from Solex Ltd. concerning petrol consumption tests and requesting a test car for further investigation.
View original record Y3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rm2/LG…

scan0114 Page 2 of a letter from Solex Ltd. discussing a proposition and overcoming preliminary difficulties.
View original record 2 6.4.29 Messrs. Rolls Royce Ltd. definite proposition before you that would be acceptable. We have adopted this course in several cases during the past few months and in each case we have been able…

scan0115 Letter to Solex Ltd. regarding the testing of a carburetter and awaiting Mr. Royce's opinion.
View original record 43603 Expl: Dept: Hs/Rn3/LG. 8th. April 1929. Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of G. Richards Esq. With reference to your letter of the 6th. inst.…

scan0116 Letter from Solex Ltd. regarding testing a car at their Research Department in France to resolve technical difficulties.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rm3/LG…

scan0117 Letter to Solex Ltd. declining to proceed with the development of their carburetter.
View original record /3603 Expl: Dept: 27th. May 1929. Hs/Jn2/LG. Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. Dear Sirs, For the attention of Mr. Mantell. Your carburetter has been submitted to our Chief…

scan0118 Letter from Solex Ltd. regretting the decision to stop trials with their carburettors.
View original record +3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB EDGE LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rm2/LG.…

scan0119 Letter from Solex Ltd. requesting confirmation on whether to retain carburettors and parts sent for testing.
View original record Y3603 SOLEX LTD. Director GORDON RICHARDS SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rm2/LG…

scan0120 The concluding page of a letter from Solex Ltd.
View original record 2 4.7.29 Messrs. Rolls Royce Ltd. Meantime, with thanks in advance for your reply, We are, Yours faithfully, FOR SOLEX LTD. Wroxton.

scan0121 Letter to Solex Ltd. regarding the return of two 35 MOHD carburettors and an inquiry about their price.
View original record X3603 Expl. Dept. Hs/Rm2/MJ. July 6th.1929 Messrs. Solex Ltd., 223-231 Marylebone Rd., London. N.W.1. Dear Sirs, With reference to your letter of the 4th.inst., we propose to send back to you the two…

scan0122 Letter from Solex Ltd regarding the return of two test carburettors and a specially made dual model carburettor.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB BAKER LONDON' Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rm2/MJ…

scan0123 Letter addressed to Messrs. Solex Ltd. accepting their offer for a carburetter and chokes.
View original record X3603. films Hs/Rm.3/MJ. August 13th.1929. Messrs. Solex Ltd., 223-231, Marylebone Road, London N.W.1. Dear Sirs, With reference to your letter of the 23rd.,July, we are willing to accept your offer…

scan0124 Letter to Solex Ltd. concerning the return of a leaking gauge head for inspection and a report.
View original record x3603 filing Hs/Rm.7/W. August 13th.1929. Messrs. Solex Ltd., 223-231, Marylebone Road, London N.W.1. Dear Sirs, Further to our letter ref:Hs/Rm.3/MJ.13.8.29. We are returning to you under separate…

scan0125 Letter from Solex Ltd regarding an order for a carburettor and choke tubes.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams 'SOLEXCARB EDGE LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. I/Rm 3/mjg…

scan0126 Questioning the performance and choke configurations of expanding choke, Claudel, and Solex carburettors.
View original record X 3603. To ACL. from HS/Rn. Hs/Rn.3/MJ.17.9.29. X2429 X 3603. (1) A clearer explanation of why the expanding choke carburetter should not function well on the road giving HP. shewn in curve (1). (2)…

scan0127 Tests comparing a single carburetter with a twin carburetter induction system on a 'Japan' engine.
View original record To R. From Hs/ACL. c. to Sg. Wor. c. to E. Da. c. to By. HS/ACL.1/MJ.28.12.29. X.5070. X.5080. X.3603. X.4660. For prints see original. 'JAPAN' INDUCTION SYSTEM. TESTS WITH TWIN RAMMING PIPE & SINGLE…

scan0128 Carburetter system experiments, comparing single versus twin carburetter setups on the Phantom model.
View original record -2- are, however, modifying this so as to get the low speed readings. Also the distribution was not good when using the two Claudels and we think considerable improvement can be made by taking the…

scan0129 The performance tests of a Solex Duplex carburetter on a Phantom II engine.
View original record To R. From Hs/ACL. c. to Sg. Nor. c. to E. Da. c. to Ry. 83603 Hs/ACL.1/MJ.7.1.30. x 3603. x 7080: SOLEX DUPLEX CARBURETTER. TESTS ON PHANTOM II ENGINE. Sometime ago we carried out tests on Phantom 1…

scan0130 Comparison of power curves for a Phantom II engine using three different carburettors.
View original record -2- by 3.25", the power was reduced a maximum of 3%. On an appended print we give three power curves taken on Phantom II engine with (a) Std. chassis carburetter. (b) R.R.C.H. carburetter. (c) Solex…

scan0131 Carburetter performance tests, comparing the Solex induction system to a standard chassis carburetter.
View original record -3- Excellent distribution was obtained with the Solex induction system and the hot spot on the beads, although of such small area, proved to be very effective. Previously when we tested this…

scan0132 Graph comparing performance results from Solex twin carburettor tests on a Phantom II engine.
View original record SOLEX TWIN CARB. TESTS ON PHANTOM II ENGINE. OPEN EXHAUST RESULTS. POWER CORRECTED FOR TEMP & PRESS. B.H.P. ENG. R.P.H. R.R.C.H 1.190" CHOKE. 32 M/M SOLEX. .893" CHOKES. STD. PHANTOM.

scan0133 Despatch of a Solex Carburetter for examination.
View original record Stores. From Hs/Rn. c. to S.O. O.O. X3603. Ha/Rn.1/MJ.7.6.30. x2048 We are sending into the Stores for despatch to West Wittering per passenger train - One Solex Carburetter, complete. Type 40 MOV.…

scan0134 Road test comparison of Zenith and Solex twin choke carburetters on a 'Japan' engine.
View original record To R. From Hd/ADL. c.c. to SG. Wor. c.c. to E. c.c. to EV. X3603. HS/ADL.1/WJ.11.6.30. -------------------- x5080 x1053 x3063. TWIN CHOKE CAR CARBURETTERS. ========================== We have carried…

scan0135 Carburettor design, including choke size, diffusers, and fuel metering for engine performance.
View original record -2- Hs/A.L./L./L.11.6.30.Contd. size than the model Solex we are sending you. The induction branches we think should be the same size as the inlet ports or only a little smaller. We could build up one…

scan0136 Carburetter testing, comparing Zenith and Stromberg models, and discussing ongoing road tests.
View original record -3- HS/ACL.1/ML.11.8.30.Contd. Zenith 140 miles was done with the accelerating pump and 140 without and a careful check made of the fuel consumption. No difference could be detected in either case. We…

scan0137 Diagrammatic sketch of a Stutz-Zenith carburettor.
View original record V184 IDLING DISCHARGE HOLE AIR NOZZLE IDLING AIR ADJUSTMENT IDLING JET FLOAT FULCRUM PIN FLOAT NEEDLE VALVE RANGE COMPENSATOR PETROL FILTER DRILLED THROTTLE VALVE PRIMARY VENTURI ACCELERATING JET…

scan0138 Summary of tests conducted with twin Solex carburettors on a Phantom II vehicle.
View original record To Hs. From ACL. x3603. SUMMARY OF TESTS WITH TWIN CARBURETTERS ON PHANTOM II. Our tests with Twin Solex carburettors on Phantom II show that the improvement so obtained is greater than the…

scan0139 Graph comparing the power output of a Solex twin-choke carburetter against the standard carburetter on a Phantom II chassis.
View original record V774. SOLEX TWIN CHOKE CARBURETTER ON PHANTOM II ( 32MM. CHOKES IN SOLEX CARBURETTER ) POWER AT ROAD WHEELS IGNITION TIMING. MAG. 18° B.T.D.C. BATTY. 12° B.T.D.C. CUT-OUT CLOSED. CHASSIS N° 19 EX.…

scan0140 Graph plotting power curves from Solex twin carburettor tests on a Phantom II engine with open exhaust.
View original record SOLEX TWIN CARB. TESTS ON PHANTOM II ENGINE. OPEN EXHAUST RESULTS. POWER CORRECTED FOR TEMP & PRESS. B.H.P. ENG. R.P.M. R.R.C.H. 1.1900" CHOKE. 32 M/H SOLEX .893 D" CHOKES STD. PHANTOM. V772 CWB

scan0141 Graph comparing Brake Horse Power vs RPM for two different induction pipe and carburettor configurations on an Engine No IV G-8.
View original record INDUCTION PIPE COMPARISON (JAPAN). ENGINE Nᵒ IV G-8 COMPRESSION RATIO = 5.25. 116° CAMSHAFT. OPEN EXHAUST. CURVES CORRECTED TO N.T.P. BRAKE HORSE POWER R.P.M. OF ENGINE INDUCTION PIPES & TWO…

scan0142 Letter to Solex Carburetter Co. Ltd. requesting particulars of horizontal type carburetters.
View original record J3603. Expl. Dept. Hs/Rm.2/MJ. July 25th.1931. The Solex Carburetter Co. Ltd., 223-231 Marylebone Rd., LONDON.N.W.1. Dear Sirs, Will you please let us have particulars of any horizontal type…

scan0143 Letter from Solex Ltd. regarding a 40 m/m horizontal carburettor for a 3.5-litre engine.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB EDGE LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF: Hs/Rm/2/MJ OUR…

scan0144 Blueprint drawing of a Solex carburettor type M.O.H.D.L.
View original record SOLEX CARBURETTOR TYPE "M.O.H.D.L." DIMENSION LABELS ON DRAWING: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, R, S, T, U, 12, 3, 24, 17, 35.5, 5.5 DIMENSIONS TABLE: A | B | C | D | E | F | G | H |…

scan0145 40mm horizontal type carburetter from Solex on sale or return.
View original record Y3603. Roy. from Hs/Rm. Hs/Rm1/AD5.8.31. Will you please ask the Solex people to let us have one oftheir 40 mm. horizontal type carburetters on sale or return as per attached letter. Hs/Rm. Att:…

scan0146 Letter to Solex Limited requesting a 40 m/m horizontal type carburetter on a 'sale or return' basis.
View original record Ref: ROY/GEA.6/EB. 5th August, 1931. Messrs. Solex, Limited., Solex Works, 223-231, Marylebone Road, LONDON. N.W.1. Dear Sirs, Thank you for your letter ref:- HG/MP of the 28th ultimo. Will you kindly…

scan0147 Letter from Solex Ltd confirming the dispatch of a 40 m/m horizontal model Solex Carburettor.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB EDGE LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 83603. YOUR REF ROY/GEA…

scan0148 Petrol consumption test report comparing an S.U. carburetter with an R.R. carburetter.
View original record Hs/Rm. from F.Dodd. 83603. 28.8.31: X1487 PETROL CONSUMPTION TEST ON S.U. CARBURETTER. Position on Half Quadrant. Speed. Full weak Normal Strong. MPH. 30 24.16 MPG. 18.56 MPG. 40 20.16 " 19.2 MPG.…

scan0149 Test report on the performance of an S.U. carburetter.
View original record Hs/Rm. from F. Dodd. TESTS ON S.U. CARBURETTER. Controls set on quadrant working as R.R. standard. Engine running light equal to R.R. answers to mixture lever control as R.R. standard., building up in…

scan0150 Test report on the performance of a Solex carburetter, detailing its shortcomings in acceleration and noise levels.
View original record -2- SOLEX CARBURETTER. We can get good slow running on the above carb. at 4 M.P.H. in top gear at this speed the suction noise is much greater than on the S.U. Snap acceleration is very poor. We could…

scan0151 Diagram showing two configurations of control linkages for an SU carburettor.
View original record CONTROLS FOR SU. CARBURETTER. BRACKET ON DASH 2.25" DASH. 17.25" 1.05" 11" 45 STD. CONTROL TOWER CARB JET. PH 14-9-31

scan0152 Graph plotting fuel consumption (Pts/B.H.P/H.R) against engine speed (R.P.M) for various carburetor needles at full throttle.
View original record FULL THROTTLE METERING "CHINA" LARGE S.U. CARB. PTS/B.H.P./H.R. 140 120 100 80 60 NEEDLE W.O.3 NEEDLE "60" W.O.2 R.P.M 0 500 1000 1500 2000 2500 3000 3500

scan0153 Performance graph showing full throttle metering with a C.S. Unit 110° camshaft and Ph.II silencing system.
View original record FULL THROTTLE METERING C.S. UNIT 110° CAMSHAFT COMPLETE SHORT TYPE PH.II SILENCING SYSTEM Pts/BHP/HR. 1200 1000 800 600 R.P.M 500 1000 1500 2000 2500 3000 3500 4000 STANDARD CARB. JETS SET NORMAL S.U.…

scan0154 Letter from Solex Ltd concerning the testing and approval of a new Self Starting 'Solex' Carburettor.
View original record 83603. SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. MOTOR CARS & BOATS EXHIBITION Oct 15-24 1931 OLYMPIA OUR STAND No. 464 Gallery YOUR REF. ROY/GEA. 6/EB.…

scan0155 Letter from Solex Ltd. regarding the upcoming availability of a 40 m/m horizontal type product.
View original record Messrs. Rolls Royce, Ltd. 2. 16.9.31. We shall shortly have a 40 m/m. Horizontal type in production, and if this question is of interest to you we shall be only too pleased to submit an example during…

scan0156 Letter from Solex Ltd. offering to submit a new 40 m/m. FH Die Cast Carburettor with an Auxiliary Self Starting feature for testing.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB EDGE LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Rm2/AD.…

scan0157 Letter to Solex Ltd. regarding the poor performance of a horizontal carburetter and its return.
View original record X3603. c. Roy. Hs/Rm2/AD. September 28th, 1931. Messrs. Solex Ltd. 223-231 Marylebone Road, London, N.W.1. Dear Sirs, We thank you for your letter of the 16th inst. We regret that we have not had very…

scan0158 Return of a horizontal type Solex carburetter to Solex Ltd.
View original record Roy. from Hs/Rm. c. Despatch Stores. r 3603 Hs/Rm4/AD28.9.31. We are sending into the Stores for return to Messrs. Solex Ltd. 223-231 Marylebone Rd. London, N.W.1. One horizontal type Solex…

scan0159 Letter to Solex Ltd. declining their offer to send their latest carburetter for trial.
View original record X3603. Hs/Rm.5/AD. September 30th, 1931. Messrs. Solex Ltd. 223-231 Marylebone Rd. London, N.W.1. Dear Sirs, We thank you for your letter of the 29th inst. We do not think that at the moment it would…

scan0160 Effect of various choke sizes on carburetter depression in a Phantom II.
View original record To R. from Hs/Rm. c. Sg. NOT. c. Dn. E. c. IV. X3603. Hs/Rm.3/AD9.10.31. X)080. We send herewith curves indicating the effect of various choke sizes used in a single carburetter on the Phantom II. The…

scan0161 Graph showing B.HP and Depression curves for experiments with various choke sizes on a twin carburetter.
View original record DEPRESSION WITH VARIOUS CHOKE SIZES PH.II EXPERIMENTS USING HALF SOLEX R.M P 29 TWIN CARBURETTER 16 DIA. THROTTLE DIFFUSER DIA. P DENOTES B.H.P. CURVE D DENOTES DEPRESSION CURVE B.H.P. R.P.M. DEPN.…

scan0162 Graph of B.HP and induction depression versus R.P.M. for two different carburettor choke sizes on a standard camshaft.
View original record DEPRESSION WITH VARIOUS CHOKE SIZES RH. P28 P1 STANDARD CAMSHAFT VALVE LIFT .480 VALVE TIMING DIAGRAM: 7.5 IN 55 EX 51 .013 CLCE TABLE: CARBURETTER: R.R. C.H. A CHOKE DIA: 1.40 DIFFUSER AREA: .28 ☐"…

scan0163 Letter from Solex Ltd. apologising for not being able to make contact at the Motor Show.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB EDGE LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 OUR REF HCM/CM. 23rd.…

scan0164 Letter to Solex Limited discussing the requirement for double choke down draught carburetters for 6 and 8-cylinder engines.
View original record +3603 Exptl. Dept. Hs/Rm.10/KW. 24th October,1934. Messrs. Solex Limited, 223-231, Marylebone Road, LONDON, N.W.1. For the attention of Mr. Mills. Dear Sirs, Thank you for your letter of the 23rd…

scan0165 Letter from Solex Ltd. regarding the availability of 35mm and 40mm dual Downdraught Self-Starting carburettors and arranging a meeting.
View original record SOLEX LTD. Director GORDON RICHARDS SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB EDGE LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF: Hs/Rm.10/KW. OUR…

scan0166 Discussion with Solex Carburetter Co. about downdraught carburetters for the Spectre and Wraith models.
View original record X3603 To E. from E/Lid. E/Lid.2/HP.1.11.34. c. Hs/Rm. Mr H.C. Mills, of the Solex Carburetter Co. paid us a visit yesterday, at our request, to discuss downdraught dual carburetters for the Spectre…

scan0167 Carburettor design, float chamber position, insulating washers, and performance characteristics.
View original record - sheet 2 - fitting a 1/4" union into it, and taking away from it a 1/16" diameter pipe to a point well below the bottom half crankcase joint. This drain is always open to the atmosphere and owing to…

scan0168 Loan and potential modification of Solex carburetters for the Wraith design.
View original record - sheet 3 - exhaust heated "frying pan" there should be no difficulty in obtaining good slow running. Mr Mills is sending us one dual downdraught 35 mm. throttle diameter carburetter and one dual…

scan0169 Letter to Solex Ltd. requesting larger carburetter jets following a preliminary test.
View original record X 360 3 Exptl. Dept. Hs/Smth.2/KW. 25th February,1935. Messrs. Solex Ltd., 223-231, Marylebone Road, London, N.W.1. For the attention of Mr. H.C. Mills. Dear Sirs, We have now carried out a…

scan0170 Letter from Solex Ltd. regarding preliminary tests on a 46 m/m downdraught carburettor and sending main jets for experimental work.
View original record x3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB EDGE LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF OUR REF…

scan0171 Letter to Solex Ltd. inquiring about the availability and price of a maximum speed governor and acknowledging receipt of carburetter jets.
View original record +3603 Exptl. Dept. Hs/Smth.17/KW. 28th February, 1935. Messrs. Solex Ltd., 223-231, Marylebone Road, London, N.W.1. For the attention of Mr. H.C.Mills. Dear Sirs, When the writer was at your Works…

scan0172 Letter from Solex Ltd. discussing the availability of different governor carburettor models.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB EDGE LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF Hs/Smith. 17/KW.…

scan0173 Letter to Solex Ltd. requesting a 46 m.m. vertical Governor Carburetter for examination and testing.
View original record Exptl. Dept. Hs/Smth.1/KW. 4th March, 1935. Messrs. Solex Ltd., 223-231, Marylebone Road, London, N.W.1. Your Ref: HCM/CM. Dear Sirs, For the attention of Mr. H.C. Mills. We beg to thank you for your…

scan0174 Letter from Solex Ltd. regarding their patented Governor Carburettor and arranging a loan of a unit for testing.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB EDGE LONDON Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF. Hs/Smth l/KW. OUR…

scan0175 Letter from Solex Ltd. regarding the despatch of a 46 m/m Governor carburettor for testing.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB EDGE LONDON' Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF OUR REF HCM/CM.…

scan0176 Letter to Solex Ltd. concerning the testing of governor and downdraught carburetters.
View original record X3603 Exptl. Dept. Hs/Smth.2/KW. 23rd March,1935. Messrs. Solex Ltd., 223-231, Marylebone Road, London, N.W.1. Your Ref: HCM/CM. Dear Sirs, We beg to thank you for your letter of the 19th inst. and…

scan0177 Letter from Solex Ltd. acknowledging receipt of a 46 m/m Governor carburettor and discussing downdraught carburettor tests.
View original record X3603 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB EDGE LONDON' Telephones PADDINGTON 8621 8624 8622 8625 8623 8626 YOUR REF:…

scan0178 Test report on the performance of a downdraught twin Solex manifold with central water-heating.
View original record To Rm. c. to HS/CTS. X1032 HS/GR.14/KW.7.5.35. 18-C-IV. Downdraught Twin Solex with Central Water-Heated Manifold. The low speed jets were found to be too large for road work and were reduced from…

scan0179 Letter from Solex Ltd. regarding tests on their carburettors and new developments.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB NORWEST LONDON New Telephone Nos. PADDINGTON 5011 (6 lines.) YOUR REF. OUR REF. HCM/CM. Cl.…

scan0180 Letter to Solex Ltd. regarding the suspension of carburettor tests and returning an unsuccessful Governor carburetter.
View original record L1032 Exptl. Dept. Hs/Smth.11/KW. 16th May, 1935. Messrs. Solex Ltd., 223-231, Marylebone Road, London, N.W.1. Your Ref: HCM/CM. Dear Sirs, We thank you for your letter of the 14th inst., and in reply…

scan0181 Requesting the despatch of carburetter parts to Solex Ltd. on a sale or return basis.
View original record <1032> To RHC/CEP. Hs/Smth.12/KW.16.5.35. Solex Carburetter. Will you please despatch to Solex Ltd., 223-231, Marylebone Road, London N.W.1., the following goods :- 1. 46 mm. Governor Carburetter 2.…

scan0182 Letter from Solex Ltd. regarding downdraught and twin carburettor tests.
View original record SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB NORWEST LONDON New Telephone Nos. PADDINGTON 5011 (6 lines.) YOUR REF. Hs/Smth.11/KW. OUR…

scan0183 Letter from Solex Ltd. offering to send an engineer to demonstrate a Governor carburettor.
View original record -2- Messrs. Rolls-Royce Ltd. 17.5.35. May we be allowed to send an engineer to show you how satisfactorily this Governor carburettor will work when correctly adjusted and, if you have not already…

scan0184 Letter to Solex Ltd. regarding the testing of downdraught and governor carburetters.
View original record X.D.32 Exptl. Dept. Hs/Smth.3/KW. 18th May, 1935. Messrs. Solex Ltd., 223-231, Marylebone Road, London, N.W.1. Your Ref: HCM/CM. Dear Sirs, We thank you for yours of the 17th inst., and for your…

scan0185 Letter from Solex Ltd. regarding a returned 46 m/m Governor type Solex carburettor.
View original record X1032 SOLEX LTD Director GORDON RICHARDS SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB NORWEST LONDON New Telephone Nos. PADDington 5011 (6 lines.) YOUR REF. OUR REF. HCM/CM.…

scan0186 Letter from carburettor manufacturer Solex Ltd. concerning trials and performance of Downdraught and Governor models.
View original record X1032 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB NORWEST LONDON New Telephone Nos. PADDINGTON 5011 (6 lines.) YOUR REF. Hs/Smth 3/KW…

scan0187 Letter from Solex Ltd. to Messrs. Rolls Royce Ltd., page 2.
View original record Messrs. Rolls Royce Ltd. 2. 20.5.35. Thanking you in anticipation, We are Yours faithfully, FOR SOLEX LTD., [Signature] Managing Director. [Watermark: SOLEX]

scan0188 Cover note regarding correspondence with Solex Limited and arranging an interview with Mr Mills.
View original record Rm Hs/Smth.from E/Lid. E/Lid.4/HP.10.7.35. Attached is copy of a letter we have received from Solex Limited. together with a copy of our reply. Perhaps you will arrange a convenient date to interview…

scan0189 Letter to Messrs. Solex Limited regarding a proposed visit to the Experimental Department.
View original record E/L1d.3/HP. 10th July 1935. Messrs. Solex Limited., 223-231 Marylebone Road, LONDON.N.W.1. For the attention of Mr H.C.Mills. Dear Sirs, We beg to acknowledge receipt of your letter of the 9th of…

scan0190 Letter from Solex Limited proposing a meeting in Derby to discuss experimental work.
View original record SOLEX LIMITED. 223-231 MARYLEBONE ROAD, LONDON.N.W.1. HCM/CM. 9th July 1935. Messrs.Rolls-Royce Ltd. DERBY. Dear Sirs, For the attention of Mr A.G.Elliott. The writer is proposing coming through to…

scan0191 Letter from Solex Ltd discussing performance issues and modifications to a Governor Carburettor.
View original record X103Z SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams SOLEXCARB NORWEST LONDON New Telephone Nos. PADDINGTON 5011 (6 lines.) YOUR REF. OUR REF.…

scan0192 Letter from Solex Ltd. concerning the allocation of an engineer.
View original record Messrs. Rolls-Royce Ltd. moment to further this proposition, and we will be pleased to allocate an engineer at any time you wish. Thanking you for the courteous interview, and assuring you of our…

scan0193 Letter from Solex Ltd. concerning a surging issue with a trial 40 m/m governor carburettor.
View original record Hs/Smith I have not replied as this is your matter X1032 SOLEX LTD. Director GORDON RICHARDS. SOLEX WORKS - 223-231 MARYLEBONE ROAD LONDON N.W.1. Telegrams 'SOLEXCARB NORWEST LONDON' Telephones…

scan0194 Letter from Solex Ltd. concerning vehicle surging issues at high and medium loads.
View original record Messrs.Rolls Royce Ltd. 10th August, 1935. It must be understood that the surging discussed above is occurring only at fairly high loads. If it occurs at medium loads, such as may be encountered when…

scan0195 Letter from Solex Ltd. regarding the testing of their Solex Governor Carburettor.
View original record MOTOR EXHIBITION CARS & BOATS OCT. 17-26 OLYMPIA OUR STAND N° 437 GALLERY Telegrams 'SOLEXCARB NORWEST LONDON' Telephones PADDINGTON 5011(6 Lines) Telegrams 'SOLEXCARB EDGE LONDON' Telephones…

scan0196 Letter to Solex Ltd. regarding test results of a Governor Carburetter.
View original record X1032 Exptl. Dept. Hs/Smth.12/KW. 6th September,1935. Messrs. Solex Ltd., 223-231, Marylebone Road, LONDON, N.W.1. Dear Sirs, We thank you for your letter of the 4th inst., and regret that owing to…

scan0197 Invoice from Solex Ltd. for parts and requesting payment authorization.
View original record Mr H Smith Hs/Rm. G/Cam/CA52/NR.14.10.35 We have an invoice from Solex Ltd. dated 11th ulto., on which we are charged 5/-d. each less 50% for two Special 5 m/m Needle Valves and 2/6d. each less 50%…

scan0198 Non-receipt of needle valves and banjo screws from Solex Ltd.
View original record G/Cam. c. to Roy. X1032 Hs/Smth.16/KW.18.10.35. Re G/Cam/CA.52/NR.14.10.35 - Solex Ltd. Will you please note that we have no record of ever having received the needle valves and banjo screws in…

scan0199 Receipt of valves and screws from Solex Ltd.
View original record Hs. Rm G/Cam/CA.9/DW.21.10.35. Further to your memo reference Hs/Smth.16/KW.18.10.35. regarding Solex Ltd., please note the valves and screws were received on the 25th January and the booking in sheet…

scan0200 Authorising the payment of an invoice from Solex Ltd for Needle Valves and Banjo Screws.
View original record To Roy. c. to G/Cam. X1032 Hs/Smth.21/KW.22.10.35. Solex Ltd. Re G/Cam/CA.9/DW.21.10.35. Will you please note that the invoice dated the 11th ult. from Solex Ltd. for Needle Valves and Banjo Screws…

scan0201 Arranging for the dispatch of two Solex carburettors to 'Solex' Works in London.
View original record 1032. G/Mt. from Rm/CTS. c. D/BP. Rm/CTS6/R.13.12.37. Will you please arrange for the two Solex carburetters to be despatched to the:- "Solex" Works, 223-231, Marlebone Road, LONDON. N.W.1. and…

scan0202 The despatch of one Solex carburetter to Solex Ltd.
View original record 1032 To Central Stores . c. Roy. c. G/Wt. c. HPS/WB. Rm/CTS.3/MH.27.6.38. Will you please despatch one Solex carburetter, type 40 FIL. No.2711742 to:- Solex Ltd., 223-231, Marylebone Road, London,…

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