further thoughts on mounting an elevator over the wing leading edge.
1) the neutral position of of the new elevator will be affected by the flow over the wing, so it will not be in sync with the front elevator. This causes control problems.
could this elevator replace the front elevator?
2) an elevator over the wing gives a slot effect, and squeezes flow over the wing.
What effect does this have on lift and rear control surface loading? The rear elevons are powered and gyro stabilised as part of the pitch/roll system.
It wouldn't be good if this was a real plane with cable operated surfaces.
Is there a better way of moving the instantaneous AC forward?
The main wing AC is 50mm back from the combined AC
I am planning to put the COG right on the main AC, and rely on gyro stabilisation to smooth out any pitchyness.
The main AC is 100 mm back from the props.
I want the aircraft to blow up and back under static elevator, chopping elevator as it comes past 45 degrees, then gyro stabilise and launch.
Actually the rear will be off the ground unless full up-elevon pins it down.
Once up to 40 mph, which should take about 5 seconds, and 50 meters, full front wing authority should be established.
In fact, turnover can be initiated at much slower speeds due to elevons and elevators adjusting trim.
A plane that would normally stall, will fly really tail down at a very low speed, with enough thrust, then flatten out as it gains speed.
Horizontally this should only take about 2-3 meters.
Any more ideas or comments?
I have seen a model flying boat take off on grass in about a 1 metre slide, with one high mounted motor, so it doesn't take vast amounts of thrust.
mind you, that had half my wing loading.
I just don't want the rear to lift off, and the front skid to drag.
It may not run straight.