JR,
I have the elevator/aileron setup,and am very pleased with it.My plane has a 25 lb turbine in it,and weighs 23 lbs empty.I have a Tam smoker in it,with 40 oz fluid.I'm guessing at a 32 lb takeoff weight.I have flown it off concrete and grass.I can horse it off the grass in a little less than 300 ft,but that isn't very comfortable.With an 18 lb motor,you're gonna need 500 ft of grass.The plane really slows well,especially with flaps,and lands and stops well.I have had an issue with stress cracks developing on the side of the fuselage in line with the forward edge of the main gear wheel wells/gear doors,when flying it off grass.I believe it happens on takeoff roll when the main gear drag in the grass with the heavy weight.They reinforced the fuse with carbon fiber around the gear flex plate/engine mount area,but should have extended it forward of the wheel well,as that is a weak point when the airplane flexes under load.I reinforced the cracking area with 3 layers of 8 oz cloth,and epoxy,and have flown off grass 5 times since then with no trouble.I would say the quality of the grass I fly off is medium to good,but not excellent.
Jascat,
150 meters of pavement is definitely enough to takeoff,and will be enough to land when you're comfortable with the jet,as it does slow very well,but I would start with a little more for comfort,until you get used to it.I hope this helps guys,and Good luck!![8D]
Erik