Well, here goes. Taking the tank apart, pulling the electric motors, and swapping in a gas engine with a idler engaged pulley style transmission. I’m tired of the 1hp from the electric motors, and not being able to have the tank really drive anywhere fun. Will probably go with a 3 to 6 hp engine in the back, and transmission in the front.
Here’s the basic plan for the transmission. The motor spins 2 shafts in opposite directions. Each has a pully on each side, which can be engaged with an idler, giving the 4 options: Left Forward, Left Reverse, Right Forward, Right Reverse.
To turn the 2 shafts in opposite directions, the current plan is to have the chain wrap around a sprocket on each shaft, and an idler to give the proper clearance.
The other option is to drive one shaft with the motor, and have it drive the other shaft in reverse via cogs/gears. But I’m leaning toward the chain method.
Thanks to the Oregon Veterans Home for letting us bring the tank there! We brought it for some of the residents to take a look at it, ask questions, have their picture taken with it, and watch my son drive it a little. We had a great time, the residents seemed to enjoy it, and the staff was really great. I also brought a display of pictures of the build process, most of which were pulled straight from this blog. Here are a few pictures of the great day we had there.
This was my son’s first chance to really drive the tank by himself, with the turret on, in an area big enough to go for a while with nothing to run into. He had a great time. The tank did pretty good.. nothing broke, and the suspension and controls all worked fine. Just need some more HP at some point, it struggles turning in place on soft terrain, and going up steel inclines.
Here is the tank getting some more testing done, and a new driver trying it out…
Here is a quick video montage of the build from the beginning…
Well the tank has reached a point one could call finished. Sure, I will always be tweaking, adding, and finishing up details, but basically, it’s done enough for now. And it looks preeeeeeetty cool.
And here is a little test drive. I had to take the turret off to drive it.. it is made for a kid afterall. Watching this video was the first time I have seen the suspension work on a bump, and it worked great!