From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Comparing different brake systems, their performance issues, and potential improvements.
| Identifier | Morton\M18\ img103 | |
| Date | 11th July 1914 | |
| of describing the peculiarities of the brakes quite adds to our stock of knowledge. A description of my present view - DRB so much better than the old Central one & overheating? getting too much? we ought to tax them in a far different way. Lord Montagu always used his side brake with his foot, which was not adjusted more than once a year. Now if the old side brake will do this work, -- then the present footbrake must do so much larger, -- but I'm prepared to admit it may not be as perfect an article as we can get it. B By far the reports read out alarm us with the exception of Mr Spratt's & Mr Otterwood's. Review serious shortcomings of the old Central, conclude - it could not pull up the car in the same distance as the present brakes. I do not consider any of the DRB complaints as bad as the complaints I can bring against the old Central, all the it was far better than the average. It suffered badly from elasticity between it & the road wheels & our more from the frying pan in & not into the fire but into another frying pan in which I think we shall be able to get out. If for long Alpine descents - special difficulties - & almost if not quite impossible to make brakes which will stand them & long descents without disadvantage, we ought to be delighted if they are not permanently damaged by the way ordinary cars apply their brakes. Looks at Jungfrau elect Rly & the use of a elect generator brake. I think we shall have to make quite a different attempt to cope with such work. outlines a 'compression' brake scheme (open the exh. valve on both down strokes - 2 cycle?). power absorption by such a scheme works to about horsepower absorption by suction stroke. -- Not prepared to go back to Central without a struggle. [Marginalia Left] ANH R's cool Appraisal of Pan into Frying Pan Alpine use another trying point CLASSIC New creation approved. another R cool classic & paper CJ [Entries] another R to J Wider Brakes instructed - re-bled Brakes - thought of me. some tested. I should expect that any times; Rocway & expensive braking down would arise Raybestos unless we keep the possibilities in view. 11-7-14 (91) X2 Wor{Arthur Wormald - General Works Manager} Mer TC 1) Waldron 2) Blackshaw reports 1) Unsatisfactory - get heated & thereafter squeak. Superior in and continuous pulling up. People complain of rapid wear & jerky 'jaggering' mechanism. garbled). Defence - 2) Billy Blackshaw much prefers DRB if driven by myself -- old brakes used to make the car dance across the road. New one wears quicker, the old one was driven by some forty v clumsy they soon got hot & the other troubles. Stark & Old on much worn tyres away quicker. I've not met anyone outside RR Works whom like the new brake. 11-7-14 (93) X20 Mr. Baileys Instruction Sheet 2/1357 P Wor{Arthur Wormald - General Works Manager} X719 Lighter horizontal at braking DRB - Ferodo glue-pressed. Re-using ferodo old with order enough for 3 sets. too open. Evans W. Wood proved at higher pull-up, now in stones. 15-7-14 (94) EM (Too marriott) 11-8-14 A-A (Ambrose-Taffy) Ward report - up to part lent touring - DRB material silent, gentler, though superior to old. No periodic vibration in r.{Sir Henry Royce} axle or transm. Improved ground clearance - static pull-up, read no disadvantages. (Hot & not said Lafond Crom) Quatro brakes were used with speed & amount of use. On 2 occasions it stayed on for several seconds in emergencies & during which car was practically unmanageable. Dump all pin-fahrt (pins) on one Bell nut throughout. Grinding noise. 16-7-14 (95) | ||