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Standard rover wheel does not seem to handle more than 21m/s


YoD

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When performing rover testing in the KSC, the wheel behaviour seems unexpected.

At 20m/s, everything is rather ok: 

Rover20msok.png

 

However reaching 21m/s (approx.) makes the rover drift/bump/salto, and changing the wheel traction level does not seem to have any impact:

Roverdrift21msnok.png

If rover behavior is not predictable on full flat ground, it can hardly be used in other situations.

Maybe one of the reason is that the runaway is not actually flat, but slightly inclined, and going over a specific speed limit creates a collision detection between wheel and ground. However, it should not produce that behaviour. 

That type of behaviour might also happens with planes, complicating a normal take off.

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It is actually worse than I thought: I tried to maintain a speed of 10-11m/s, and the same drift continue to happen (with no info or log displayed in anyway).

Drift behaviour seems to be based on an amount time passed driving, no matter the speed, which is even more unexpected as there is no way to avoid it.

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