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).
List of copper pipes with specifications for the 20 HP and 40/50 HP chassis.
| Identifier | ExFiles\Box 77\2\ scan0140 | |
| Date | 14th December 1925 | |
| X3512 To BY/HM.{Capt. W. Hallam - Head Repairs} COPY+ BY/SS{S. Smith}7/DB{Donald Bastow - Suspensions}14.12.25. RE. COPPER PIPES ON 20 HP. & 40/50 HP. As requested we give below a list of the copper pipes, used on both the 20 HP. and 40/50 HP. chassis. Sec.No. Piece No. Title. No. Off. Out: dia. S.W.G. Length. 20 HP. CHASSIS. 5000 E.50120 Oil Pipe. 3 .250 20(.036) 3.550 5060 E.52166 Outlet Pipe. 1 1.125 18(.048) 1.750 5060 E.53575 Tube. 30 .500 18(.048) 4.950 5060 E.53576 Tube. 10 .500 18(.048) 3.475 5070 E.51543 Drain Pipe. 1 .187 20(.036) 8.000 5080 E.53196 Breather Pipe. 1 .500 20(.036) 4.750 5100 E.52760 Lub: Pipe. 1 .250 18(.048) .300 5160 E.51733 Ext: Pipe. 1 .375 20(.036) 3.500 5160 E.50460 Drain Pipe. 1 1.000 18(.048) 2.250 5180 E.52455 Discharge Pipe. 1 .375 20(.036) 2.275 5190 E.52594 Pipe. 1 1.125 18(.048) 7.000 5190 E.53464 Pipe. 1 1.000 18(.048) 9.300 5200 E.51039 Delivery Pipe. 1 .500 20(.036) 17.000 5200 E.52454 Pipe. 1 .312 20(.036) 16.750 5200 E.53659 Pipe. 1 .375 20(.036) 14.300 5200 E.53660 Pipe. 1 .500 20(.036) 7.300 5250 E.53377 Inlet Pipe. 1 1.125 18(.048) 4.000 5250 E.50460 Connection. 1 1.000 18(.048) 2.250 5250 E.50783 Escape Pipe. 1 .562 22(.028) 27.500 5260 E.53487 Escape Pipe. 1 .562 22(.028) 11.200 40/50 HP. CHASSIS. 52[obscured] E.73639 Oil Pipe. 7 .375 20(.036) 4.200 5050 E.73373 Tube. 12 } Bt.{Capt. J. S. Burt - Engineer}Out:dia 18(.048) 4.300 5050 E.73374 Tube. 30 } specially 18(.048) 4.800 tapered 5070 E.71979 Drain Pipe. 2 .250 20(.036) 7.750 5080 E.71869 Breather Pipe. 1 .500 20(.036) 5.500 5080 E.51543 Drain Pipe. 1 .187 20(.036) 8.000 5160 E.71327 Drain Pipe. 1 .250 20(.036) .850 5190 E.71319 Pipe. 1 1.250 18(.048) 4.375 5190 E.71328 Pipe. 1 .375 20(.036) 1.125 5190 E.71392 Ferrule. 1 1.500 16(.064) 1.500 5190 E.71944 Inlet Pipe. 1 1.000 18(.048) 8.500 5190 E.71946 Branch Pipe 1 1.000 18(.048) 2.750 5190 E.72759 Pipe. 1 1.250 18(.048) 6.375 5190 E.72913 Bottom Pipe. 1 1.250 18(.048) 13.000 5200 E.70842 Oil Pipe. 1 .625 20(.036) 12.000 5200 E.71204 Oil Pipe. 1 .312 20(.036) 16.750 5200 E.72844 Oil Pipe. 1 .312 20(.036) 6.150 contd :- | ||