lumpman2 Posted October 1, 2013 Share Posted October 1, 2013 For some reason my Munar rover just will not stay on the ground. When I try to apply forward movement on the wheels, it always wants to use torque and flip as well. Precision controls help a little bit, but eventually they don't become precise when you hold down a key for too long and the thing wants to flip again. I did try using docking mode for translation movement, but that's no different from staging mode. As far as I know there is nothing that can apply torque (2 command seats). This happened before with my other rover but this one is the same as another one I tried which did NOT flip at all. The only difference is that now I'm using the treaded wheels rather than the tires. Link to comment Share on other sites More sharing options...
abihoooo Posted October 1, 2013 Share Posted October 1, 2013 Usually I turn off the motors on the front wheels and lock the steering on the rear wheels on my rovers. I also helps to have a low center of mass on your rover. Link to comment Share on other sites More sharing options...
lumpman2 Posted October 1, 2013 Author Share Posted October 1, 2013 (edited) Okay, I'll have to try that. I tried switching off the motors on the wheels in back (the side that was on the ground while flipping) and it started moving at 2m/s. EDIT: Tried that, it started moving a bit slower but still wanted to tip backwards. I didn't even make the rover that short either; it's like an average sized rover and the wheels are about two girders apart. I don't see why it should be tipping backwards though. Edited October 1, 2013 by lumpman2 Link to comment Share on other sites More sharing options...
Muka Posted October 1, 2013 Share Posted October 1, 2013 Rebind keys for rover control since same keys are used for yaw/roll and pitch. In high gravity bodies that's not the issue, but on ones with lower gravity force reaction wheels have enough force to sometimes filp Your rover Link to comment Share on other sites More sharing options...
Tank Buddy Posted October 1, 2013 Share Posted October 1, 2013 Switch your rover throttle and steering to the arrow keys and make sure SAS is off. If that doesn't work you have a design flaw. Link to comment Share on other sites More sharing options...
lumpman2 Posted October 2, 2013 Author Share Posted October 2, 2013 I changed the rover controls to the numpad keys since I use the arrow keys for the camera a lot. But the thing still doesn't want to stay on the ground. Any ideas what could be the problem here? Link to comment Share on other sites More sharing options...
Sirine Posted October 2, 2013 Share Posted October 2, 2013 Survive flips intact? well, below are example of "flips proof"..http://www./view/x9cbaigb736jcv3/004-Ultimate_Rover_F.craftAnd Fort...put more strut..http://www./view/ws9bwxa3i9bm1pb/004-Ultimate_Rover_J.craftAnd if you are looking for anomalies at Mun, you better change from Rover to something such as rocket type VTOL shuttle craft. Link to comment Share on other sites More sharing options...
Runboy Posted October 2, 2013 Share Posted October 2, 2013 I just saw this thread and only the last picture,so sorry if I missed anything.If my calculations are correct,your rover is flipping because it has a high center if mass.Like,a TOWER on top of the rover. Link to comment Share on other sites More sharing options...
Runboy Posted October 2, 2013 Share Posted October 2, 2013 The center of mass is (For this rover post/thread only) the point that pulls you back when you accelerate.Your wheels want to go forward but the top wants to stay behind(Thus resulting in the leaning/flipping-back problem).If the center of mass was lower,the leaning back would be stopped by whatever is supporting the rover from behind (The wheels),but with a high center of mass the top's support is farther away,therefore resulting in un-supported leaning-back.P.S. This is the best way I could describe what is happening,but if I was too complicated or unexact in some parts,im sorry.Here is a smiling Kerbal to compensate for your time lost---> Link to comment Share on other sites More sharing options...
lumpman2 Posted October 2, 2013 Author Share Posted October 2, 2013 Right, I first thought a high center of mass meant there was a lot of mass in the middle. Then I read your first post and then figured it out. I decided to decommission the whole lander (as in eva one of the guys, have the other guy lift the docked rover and jump out and let the lander + rover blow up on the ground). I'm now going to send a rescue mission for the two guys Thanks for the help Link to comment Share on other sites More sharing options...
nuclearpower13 Posted October 2, 2013 Share Posted October 2, 2013 Its possible that your center of mass is off center and the amount of thrust generated by the wheels counters gravitys abilty to push your rover down. I had the same problem with my large habitation rover i put on duna and i solved it by attaching RCS thrusters and adding the large RCS tank to the hull of the rover the additional weight plus the force generated by the RCS pushing down got my rover to stay on its wheels. But for your rover you might need to widen the surface area and use the RoveMax Model one wheels which should provide additional stabilization. Link to comment Share on other sites More sharing options...
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