AUGUST QUIZ
The noli-pi■torial quiz last month either wasn’t palatable to the customers or else too difficult for them to answer. The answer we wanted was ” 40/50 ” Napier, this great car having No. 1 piston slight ly less domed than the rest, to obviate vibration. Mr. J. A. F. Blight, of Callington, rather ” hoist us with our own petard ” by writing as follows :—
” One answer (if not Ole answer) is the four-cylinder sleeve-valve Voisin of the ‘twenties ; the model was, I believe, known as the ” 22/90.”
” My father owned one, and during a Laystall engine rebuild was elated to find the lone low-compression piston, which he thought was the reason for a pronounced engine ‘ thump ‘ at around 2,000 r.p.m. So he fitted four identical new pistons, whereupon the car motored (So he says I) like a lame kangaroo. Telegrams flew from Lomb in to Paris and back, and back also went, the low-compression piston ! “
