Hey Guys,
I hear you on the 300' take off.

I 'm just trying to get the thing to fly off grass for the buyer and I thought changing the outlet diameter would be the best way to go.
Chris, that's interesting about increasing the diameter. I thought decreasing the diameter would work! I totally agree with mugenkidd, about the sweet spot of the exit velocity. I have a older YA_F18_Single with its dual 2.5" exits, same fan and engine with about 15 degree of flaps, amazing how she halls butt and is up and at'em at 300' on grass.
I thought I'd ask here on RCU to see if someone else has a good viable solution without me having to make any super major changes. Figured the thrust tube would be the best place to start. I was hoping to get this to work out, as I'm getting a sweet price for it that's gonn'a help fund my next turbine.
Thanks For The Suggestions,
Keith