By the way the engine of choice for light aircraft is the rotor. The 13B mazda wankel design. Theyve been proven to be more cost effective and reliable than the 4 times more expensive light aircraft piston engines.
When people bag the rotor they have no idea and just go on by their mates tales who had a rotor rebuilt with second hand seals and shortcuts left right and centre like as expected in lazy 99% Australian workshops.
As it is possible to just spend a few bucks and get them going for beyond the warranty period as many workshops do and call them a refresh. Then these people who pay from 1500au-2500au expect it to be reliable. Rotors have won many endurance races to be banned at bathurst by the v8 camp since 1983. They ran the weird bridge porting cause Peripheral porting has been banned in almost all forms of racing.
Check out and its links:
http://www.monito.com/wankel/wankel.htmlThe aircraft motor gurus know their stuff and are more thorough than we auto guys. The worst that can happen to us is the car stops and we can walk or taxi home.