Redline Airshows RV8's - Oshkosh 2018 - Sunday 

Maxime Mergen yea that’s what I was wondering

Sounds like aeio540

Redline website says 200hp - IO-360? Maybe strange noise is from combination of 2 sets of engines and props

They must be turning 2600rpm and full power to get that sound if they are in fact 360's....but it does not sound like a 360 to me either. I am a io360 RV8 owner.

Sweet sounding for sure. Makes me want to park the 172 and start building.

well you can’t do aerobatics in Icon a5 and you get less speed