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).
Progress log from 1913 detailing development notes and test results for double rear brakes and other vehicle components.
| Identifier | ExFiles\Box 182\M18\ img094 | |
| Date | 21th February 1913 | |
| DOUBLE REAR BRAKES * R to CJ & W. By.{R.W. Bailey - Chief Engineer} Progress with costs? Pos cures for 1) Gearing or other 2) Vibration 3) Torsional etc/no drum (Coronation rattles) 4) Bevel gear & viscous ae/n desperate 2 fronts needed, no dilly dallying. Pro & cons 21-2-13 AW/TOH Exp 2/B Gen Satisf exc when only ancle periot reduced 24-2-13 & Wor{Arthur Wormald - General Works Manager} Dept's memo. Pro & cons incl Wt-mor. N.B. V lucid 5-3-13 R - CJ. By.{R.W. Bailey - Chief Engineer} No. Wor{Arthur Wormald - General Works Manager} Push forward. Rectify minor faults 20-3-13 R.{Sir Henry Royce} to cf HY{Tom Haldenby - Plant Engineer} Weekly report Agree. push on with several more Rakes C.J. Wor.{Arthur Wormald - General Works Manager} No. afandin ferodo type C.I. liner. 28-3-13 Radiator the 22" rad in the only possible position AW/B'H Exp Dept B weekly report to R.{Sir Henry Royce} J.{Mr Johnson W.M.} incl Pok lighting sets 29-4-13. Weight added: 56.1/4 lb Removed: 51.5 lb Spring & unsprung wts: pro & cons. * 3rd axle now on the road, on 23011 which is worth 1/2 sent to R.{Sir Henry Royce} AW/SM. * Rep. on 2301 Hines rep/B axle v.{VIENNA} good for silence and 'pulling' & low sp.{Mr Spinney} Brakes v.{VIENNA} satisf. 22-4-13 * CJ to No. Put a double brake on the road at once. Run 200 miles a day, pref. in France up to 10,000 miles. Shd not take more than 10 weeks. Poss. effect on 3700 series prod. 22-4-13 * Cooling - Present system is unsatisfactory R telegram to J.{Mr Johnson W.M.} ref 3700 Sty. Steering o Brakes. Wire wheels. Rod. Bonnard. Double rear brakes. R tells vibrations Wor{Arthur Wormald - General Works Manager}/No ref Dept'l memo. ref use heavy closed body. - backward? from Ayeres. CJ message. forward from Paris to C. (not Roscan). re Goulling? 24-4-13 Na{Mr Nadin} - By R to TC of Urgency Report AW/SM 24-13 28-4-13 * R to J c Wor.{Arthur Wormald - General Works Manager} No " " Ref 2301 New trys on several wks/m up to 72 m.p.h. V pleased with brakes. 5-5-13 Sty 9-5-13 & F.{Mr Friese} axle control. P. spring coupling marginal impr. 28-5-13 -72 m.p.h. 2500 r.p.m. (Valves float at about 2550) for Brooklands demo 18/52 inst of 16/52. Stronger Valve spgs. higher compr. (75 to 80 instead of 64) Large carbs may be poss. Bangle for higher comp - B'oil "Adj" try in 43 " & 4" dia? 30-5-13 PISTONS Light. - steel Standardisation aspect. Former foet brake Adj at C's fin Lo C's R to CJ This n/1 car on lines of 3700. Are Director Interloc? Ry car that goes mountaineering - 3" makes heavy work. No brake adj needed. 7-6-13. Neat handbrake Hard adj ill advised, existing one needs a pit. This one can be done. I who'll take it over description - why & what. Pleased that the mayor halts needed. Wor{Arthur Wormald - General Works Manager}/t By.{R.W. Bailey - Chief Engineer} No. Tells of R'n favourable reaction. Need Locomotive type steel for double rear drums 12-6-13 X2 SM Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer} Report. 2300 has done 10,000 miles in France. D.{John DeLooze - Company Secretary} rear brakes - one. v.{VIENNA} gd. ref wear. another not 10,000. Hand brakes good but shd last. 10-7-13 X2 Wor{Arthur Wormald - General Works Manager}/SM. 10-7-13 Standardise R.{Sir Henry Royce} Wor{Arthur Wormald - General Works Manager} No. act 3rd July. Opinion on D.R. brakes. on 2300 with leany land. body. incl fast & heavy run on Continent of 3,238 miles - over 5,000 miles. Brake shoes small ends. page 11 21-7-13 * 2,300 - completed 10,000 miles 29-4-13 FHR - Why do so many good things for us. Worth a risk. 28-5-13 FHR - 100 miles up to 73 mph. Could not imagine anything better. 5-5-13 FHR - Car R/T for mountaineering. hitting & no pit. Carry well. Doesnt heat up any more than standard job. 10-6-13 FHR - Action wonderful improvement. Whole chassis quieter. 9-6-13 Hurst - dinner of 2301. v.{VIENNA} efficient. little springiness in mech/m.{Mr Moon / Mr Moore} R to J.{Mr Johnson W.M.} 31-7-13 By sayg D.R. brakes will mean freedom from trouble. Hope he is correct. Still experimenting. Try SINGLE HELICAL BEVELS for trans. little doubt it shd be helical but let the makers try. Wor{Arthur Wormald - General Works Manager}/Rd The third axle on which gears decent, seem to roll well 26-8-13 | ||