Hi Guys,

I am getting ready to build a ScaleWings F7F TigerCat. I had chosed to run DA-60's for power but was worried about vibration on a composite airframe. I have read most of this thread and everyone that has these motors seems to be happy with them. I planned on the UMS-77 for power. I am wondering how much forward speed I will loose with radial versus a 2 stroke engine. I would like to run a 22x10 three blade if possible. Has anyone had any deadsticks with these line of engines?

Thanks,
Doug