Not so rediculous.
In the meantime, MVVS has fixed some minor bugs and changed the front bearing system and ignition of the 45.
For results: I have tested the engine with MTW canister mufflers. Header length proved sufficient long to allow the use of swan neck headers. See [link=http://www.prme.nl/forum/viewtopic.php?t=54]here[/link] for the results.
Fuel is Aspen at 1:33 mix with Putoline RS959. Starting is instant, once you get the hang of Aspen. A crowd always gathers to see it happen. [8D]
With non-restricted engine, my 20 lbs tow plane crisply moves out of sight vertically without slowing down. Due to local field noise issues I had to restrict the engine with a 26cc carb and specially restricted MTW TD90 canister, so now the tow plane has towering verticals, but still is fully aerobatic at 78 dB(A) (at 7 meters). With this carb there is absolutely no midrange burble. It sets in just above idle, so even if a little power is applied in landing, the engine reacts to every click of throttle. Power in this setup is much like a pitts muffler style setup which btw looses some 1000 rpm over the can muffler
Stick is set up to open the throttle to 1/3rd when the stick is at 50% to compensate for the lousy Walbro linearity.