Hi Chaitanya, Your query prompted me to rig my model and double check the flap throws. Like you I have 15 mm deflection for take off and 35 mm for landing. I fly from a grass strip and have a Wren ss for power. I find I have to use a fair bit of elevator to get the model to unstick andyou have just reminded me to dial in a few clicks of 'up' elevator trim for take off. The landing flap deflection allows me to 'draw' the model in using a resonable amount of power. The speed bleeds off quickly when I close the throttle and the landing becomes very manageable. Flying from a grass stripwith a restricted length runway ensures that every landing is like a carrier landing.
Apologies for under-estimating your jet activity. I wish I had the same level of jet support in my club. Re. the intake area, as a former D/F flyer I am particularly interested in duct design and the Flash does seem to have sacrificed 'form over function' but I am no expert. This forum is testiment to the number of people who have experienced over heating for whatever reason. However the good guys seem to have it mastered and fly with turbines of similar size to yours although the factory addition of naca inlets at the rear bears testiment to the underlying problem. I fly without a by-pass and have experienced no problems with the rear end being only slightly warm. I use a Wren augmenting thrust tube with a 2mm ceramic blanket for insulation. Ron.