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 engineering modification schemes with their respective issue dates.
| Identifier | ExFiles\Box 4\1\ 01-page221 | |
| Date | 20th November 1934 | |
| sheet 2 Scheme No. Date Issued. LeC.4208. Raised petrol tank and enlarged swan neck. 20.11.34. LeC.4217. Modification to tappets. 23.11.34. LeC.4225. Front expansion box and bottom water pipe (increased ground clearance). 12.12.34. LeC.4236. Modified rear end of rebound girder. 12.12.34. LeC.4242. Modified position of headlamps - 2nd chassis. 12.12.34. LeC.4245. Modified crankshaft flange. 11.12.34. LeC.4250. Steel push rod. 13.12.34. LeC.4255. Modified position of horns. - 2nd chassis. 14.12.34. LeC.4262. Modified controls to suit Marles Steering. 20.12.34. LeC.4272. Revised steering positions. 4.1.35. LeC.4273. Mixture control on instrument board to suit latest instrument board design. 2.1.35. LeC.4275. Modified oil piping on 3rd crossmember. 31.12.34. LeC.4284. Longer pistonand cylinder (for use with strap rods to LeC.3860). 12.1.35. XX LeC.4285. .250" longer piston skirt. 4.1.35. XX LeC.4202. Experimental baffle in oil sump. 16.11.34. N.Sch.4251. Modifications to speedometer drive and bolting. 1.11.34. EVS. 129. Front wings, apron, radiator and headlamps for 2nd chassis. 5.11.34. EVS. 130. Modified position of body brackets. 5.11.34. | ||