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).
Spring assignments for various car models based on weight distribution calculations and questioning underlying assumptions.
| Identifier | ExFiles\Box 16\7\ Scan297 | |
| Date | 3rd October 1930 guessed | |
| - 4 - 1 spare wheel at rear. We should take 140lbs. from front weight, and add 60 lbs. to rear. 2 spare wheels at rear. We should take 160 lbs. from front weight, and add 160 lbs. to rear. On the assumptions made above as to assigning springs, we should have (for cars with two spare wheels at side):- Table III Type Front Springs Rear Springs Derby 1100 1100 Regent 1150 1200 Dover 1150 1200 St.{Capt. P. R. Strong} Martin 1150 1200 Newmarket (small) 1150 1300 " (large) 1150 1300 Huntington 1150 1300 St.{Capt. P. R. Strong} Andrew 1150 1200 St.{Capt. P. R. Strong} Regis 1150 1300 Trouville 1150 [Handwritten note]: 1350-1400 These springs appear about "one stop" heavier than you assign for cars of this type, and we therefore think either that:- (a) Our weights of table II are heavier than actual practice. (b) You only assign half the passenger load. (c) Unsprung assumptions may be wrong. Will you give us your assistance in this matter please? Maurice Olley B Encl. 2 | ||