I cannot refrain from comment on the inaccurate assertions of your correspondent “Two-Point-Six.” If I remember aright, Mr. Sutherland, of Aston-Martin’s, tested and proved correct the rev.-counter alone from Mr. Thursby-Pelharn’s T-type M.G. Midget, and the latter gentleman stated that his speedometer and rev.counter agreed exactly. It was left to another correspondent to point out that the rev.-counter on the T-type M.G. does not record the speed of the engine, but that of the dynamo, which on that model is driven at 1.13 times engine speed, and that therefore both the instruments must be reading 13 per cent. fast. This brings the claimed 96 m.p.h. down to approximately 84; the latter is not impossible, but the former definitely is. I am, Yours, etc.,
Leicester. J. A. COOPER.