Originally Posted by Finnrotor.com
Even if those car engines could be certified in aviation use, i doubt that they would ever reach sort of TBO that for examble Lycoming has. Even if those engines are massproduced (cheap), a TBO of 300 hours and it would be quite hard to sell it to anyone. An average R22 should get it's engine changed twice a year. Nice.
Finnrotor, you appear to be a bit of an expert on Subaru auto engines. I would like to know which aircraft application using the EJ25 engine yields only a TBO of 300 hours.
I see from your earlier quote, you sugest that aerokopter should use a different engine to obtain certification in the US and Europe. Besides Lycoming, Continental and Franklin, what do you sugest?