My son have a rustler 4x4 vxl.

When we jump High and give full trottle in the air the truck dosnt want to go backwards.
It just standing still.

Wonder if itís ever possible to do this with the 2s, if i gear it to optional gearing would it help?
Would it help to order a 3s lipo?
Or cant this truck offer enough torque to do backflips when you are in air?

On my e maxx brushless i easily can do backflips in High air if i just toutch the trottle, but this stock rustler wont do it.

Appriciate any advice to get him to do it, he want to practise on this if the truck can get more torque to do it.
I thought it should be easy since itís a brushless 4x4.