Hello Foofydoo
Rene's Bluntie was 84" span and flew really good on a KJ66 running at 120K and 25lbs. The engine had the double preload upgrade to go up to 120K. It would be very scale with a standard KJ
http://www.galtechmodels.com/Turbine...ikeM-Kit.shtml
We are in the process of building the next one with a bunch of upgrades.
Cheers
Tarquin