Vintage Thing No.4.1 - The supercharged two stroke Trojan engine
At last - more info including a picture of that weird engine I found backalong A chap called David Pickard has sent me a link to the Trojan Trust website where there is a reproduction of an article published in the October 1946 issue of the Commercial Vehicle User's Journal . What wonderful names we used to have for our magazines! And the engine featured in this article appears to be the same supercharged engine that I found in an old copy of The Motor Vehicle by Newton and Steeds. This engine powered the 15cwt & 25cwt Trojan vans after World War II and in general terms the Commercial Vehicle User's Journal matches the technical description provided by Newton and Steeds - to wit 24bhp and 1186cc (65.5mm x 88mm). Although it is a four cylinder engine, it has six cylinders - four of them paired in two split cylinders that share a common combustion chamber. But the most interesting feature of the design is an inlet rotor in the head of the charging cylinders. This ...