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by leetrout 2439 days ago
My armchair physics example would be a balance seesaw and let’s say the left side is the “front”. If you attached a rocket motor (or jet engine) in front of the the CG point would the the thrust push the left side of the seesaw up or down?

I believe the issue is precisely this - the engines were moved (and they are bigger so more powerful perhaps?) forward and the thrust probably pushes the nose up.

1 comments

Seesaw isn't the best model really. A seesaw with a turbine engine strapped to it, (besides making a godawful mess and maybe just maybe making the HOA angry enough to worth the trouble of setting up) wouldn't do much since it's a fixed structure and not interacting in any way remotely consistent with a body in motion through a fluid.

Boat might be a better model, or even better, use your hand hanging out the window of a moving car.

If you taped a couple of projections under your hand, and slowly increase the Angle of Attack of your hand to get a feel for what the old design would do.

Then do the same thing but with those protrusions up in front of your hand.

You should notice that it becomes harder in the second arrangement to counter the tendency of your hand to continue pitching up after a point. Assuming your weird mini-not turbine construction stays together in the airstream.