Algodoo

how do you make a gravity group?

This is good except for the fact that it doesn't actually work as an engine.

good job

This is pretty good. It seems quite reliable. Good job 9/10

just a bouncy engine?

This is nice 10/10

hmmmm

This is a decent 8/10 - the controls are reversed, and the driver is too small, among other things

The tyres need balancing 7/10

Looks familiar

But it's not very well built, so 5/10

it's pretty good keep it up

This is pretty good. I don't know why it hasn't been rated

I like the concept but there's a lot of room for improvement, so 8/10

VERY good job indeed. 10/10

runs well 9/10

This is nice

This is awesome.

This is great. 9/10

That could easily be improved by the shape of the shell, and adding a barrel.

This is an excellent job, but the only problem is that it's sorta slow (I think), and that when it goes over a hill, the front lifts up. 8/10

Hey wild bill, I used this as a featured scene on the new Algodoo Chatroom, if you don't mind I like it

http://algochat.webs.com/

You could work on making it a bit stronger, as in making the shot actually knock down the stack of boxes with force. The shot also bounces off, which is a problem. 6/10

Excellent scene. One thing you might want to fix is the inaccuracy of the minigun when airborne (pointed in different directions). 9/10

This one seems to jam a bit more often than your other guns. 9/10
As always, it would be a lot better if your guns had a KICK from the recoil.

Amazing. 10/10

I think it still lifts a bit even when you bring sim.frequency up to 400, so I think the scene might just need a bit of tweaking... Again, as I said I threw this together fairly quickly, without trying to see if this accurately represented an airfoil.

Some other things: I should probably make 2 rows of air on each side of the wing to simulate the extra pressure that keeps air from scattering in real life, which happens in mine.

EDIT:
ok I think there are several problems with this actually... It seems like the wing may just be pushed up by several circles that bounce on the base of the moving construction, or the wing may just be following the path between the two rows of air... I'll have to investigate it..

ah gory!
9/10

Good job. 10/10