I post this for Michel Wilson, who was recently at a Autosport show in Birmingham, England.
"I was told that the heads are prototype castings for a new 1500cc bike
being developed for Rickman Metisse which is due to be announced in
June."
Still very interesting as it is not a 4 in line. Curieus if the two inside exhaust valves stay cool enough with this concept.
Greets,
Walter
T4T: 2,4ltr Type 4 Turbo engine, 10.58 1/4 mi in a streetlegal 1303
"Mine isn't turbo'd to make a slow engine fast, but to make a fast engine insane" - Chip Birks
Admittedly, it has been more than 50 years since the AJS 'triple knocker' addressed the question. The triple knocker was a three [yes 3] cam single that had two front mounted exhaust cams/valves. During the long trip up to 1,500 feet in altitude [from sea level] during the Isle of Man race, the triple knocker gave the [then European] competition two choices, 1) back off and let the AJS win; 2) burn their exhasut valves and let the AJS win. Some teams tried strategy 1), some tried strategy 2). In either case, the AJS won.
Now, they have learned a lot about air flow and cooling in the last 50 years, but I wouldn't want to be riding an air cooled four valve per cylinder motorcycle up the Isle of Man climb to 1,500 feet while chasing a liquid cooled machine. [I HATE IT when I burn exhast valves.]
I'm curious what the bore centers and max size are
I bet those would cool just fine on a street car.
Addendum to Newtons first law:
zero vehicles on jackstands, square gets a fresh 090 and 1911, cabby gets a blower.
EZ3.6 Vanagon after that.(mounted, needs everything finished) then Creamsicle.
