Wing-Physics under-water.

I've been calculating the wing-physics for our game using the surface-area of the wing, speed, lift-coeff, and air-density, but obviously it freaks out underwater (since the water-density would be 1000 instead of 1.2 kg/m²..)
I was wondering how to solve this, without messing with the main rigidbodies drag and angular drag.

Any ideas?

 

in my experience, most planes dont fly under water

 

What's going wrong with it? The only difference between water and air in my speedboat simulator is the fluid density and it works fine.

 

well, the fluid density is around 1000x higher then above-water, even if I lerp between it, the force-difference is too high and stuff spazzes out. Also, that looks awesome man

 

Things will spaz out if the forces are too great relative to the mass of the object. My boat sim works because it's using real numbers for everything (my water is also 1000x denser than air). Could your masses be too small? If I just make a 1 meter cube and drop it in the water as a 1kg mass, it'll freak out too because it's so light. Then you need a much smaller physics time step for it to work.

It shouldn't need to be crazy though, my boat sim is only running at 100Hz on the physics side.

 

Here you can see aerodynamics and hydro. The boat is chine walking at high speed and eventually the air blows it over:

Again, that's having water that's ~1000x denser than the air. Works fine, I suspect your rigid body masses are too low. This is the trouble people get themselves into when they *don't* use real values for physics. Fake one thing and then later it comes back to bite you...