P-47 Wing Repair

The Hobby-Lobby “Hun Hunter” P-47 seems to have a small design flaw.  Because of the size of the wheel well required for retracting the gear, there is not a lot of foam material along the leading edge of the wing in this area.  At the thinest point, it’s pretty thin. The wing is subject to cracking in this area — starting at the leading edge and proceeding through the middle of the wheel well.  There is a carbon spar in the wing so the wing isn’t in any danger (I don’t think) of coming off in flight, but it does …
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Visualizing Circle Holds

(If it was me, I’d click on the “watch on youtube” icon in the lower right corner and select 480p and go full screen — but that’s just me.)

Flying a continuous tight circle pattern around a fixed ground reference point is about the closest thing we can get to parking an airplane in flight. It isn’t too hard to do a lazy orbit around the point, but we want to keep the radius fixed, even if there is a wind. This means that as we fly around the perimeter of the circle we have to continually vary our bank …
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Better FlightGear Smoke

Overview

A popular way to create smoke effects in visual simulation is through particle systems.  Briefly, a particle system emits particles.  Each particle can have a texture as well as a variety of physical characteristics.  Particles can be shot or just placed in the world.  If you shoot your particles you can control a randomize range of angles and speeds.  You can give your particles a life span in seconds and have them grow or shrink over their life.  Particles can have mass and surface area which affects their motion.  They can move relative to the world or relative to …
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