It's not going to sound right, either - the Merlin is a very distinctive-sounding engine that is probably seared into the minds of everyone who's been to a WWII

It's not going to sound right, either - the Merlin is a very distinctive-sounding engine that is probably seared into the minds of everyone who's been to a WWII-era aircraft show. Then again, you've got nothing to fear; the Rotax engine will be fine as long as the Bf 109 replicas also have them ;)