StuG Ausf B 1/35

[jaxenro]

I admire the clever resourcefulness of home-made tools to solve a problem. Bravo!

One step up from a monkey but it works

[jaxenro]

Slow progress I added the front armor plate and gear covers to the hull tub. The front axles are 1/16 tube and ride in bushings made from 3/32 tube at each side and the center. Currently the axle is one piece to set the center bushing correctly (I set it in a bed of epoxy putty) but I will cut in the center and trim to length. I have a set of miniature worm gears on order to turn the power from the motors sideways that will be super glued to the axles. Still working out which power plant to use but I have some coreless motors with integral gearbox that I think will work well


Gear Cover


Split Axle

[Herr Dr. Professor]

Neat stuff: I will be interested in photos of the transmission as you develop it, for I am trying to get straight in my head how the worm gear will be on the axle and a gear on the motor shafts. I would expect the other way around, but I am quite ignorant about these matters. Carry on, dauntless one!

[jaxenro]

I may end up going the other way as I get everything and review it. I am going in fits and starts because I keep ordering new parts and waiting for them to come in

I am ordering extras though like 10 worm gears instead of 2 so next time I will have them. Planning a Panzer III J and a StuG III D next

[jaxenro]

So this is my current thinking for the drivetrain. The motor is coreless with an integral gearbox and the worm and spur gears are plastic. I haven't decided which will go where but one will be on the axle and the other on a shaft from the motor. The dimensions of the motors are small enough to fit so it should be almost a direct shot and I think powerful enough to make it work. As usual it's all on order so I need to wait for it to arrive to finish it off

Motors
Actual Rated Input Voltage: 6V-12V
Base RPM: 77RPM
Length: 30mm
Diameter: 16mm



Spur Gear
Modulus: 0.5M
Teeth: 10
Length: 8mm
Diameter: 5.5mm


Worm Reduction Gear
Modulus: 0.5M
Length: 10mm
Diameter: 6mm

[Herr Dr. Professor]

"Base RPM: 77RPM" Did I read that correctly: 77 RPM? Wow! I wonder if there are any such motors with enough power for 1/16 AFVs? I like my tanks moving at a crawl, sneaking up on those nasty bad guys.

[jaxenro]

Built in gearbox brings the rpm way down

[Herr Dr. Professor]

Duh! I should have realized that!

[jaxenro]

Front axles are done and the worm gears are finished. Final glueing will wait until I have the spur gears set on the motor/gearbox so I can get it ll lined up correctly

speaking of motors they arrived and the fit looks perfect. I need to build some sort of mount to the gears line up and the motors are fixed in place

[modler]

Front axles are done and the worm gears are finished. Final glueing will wait until I have the spur gears set on the motor/gearbox so I can get it ll lined up correctly

speaking of motors they arrived and the fit looks perfect. I need to build some sort of mount to the gears line up and the motors are fixed in place

Any new progress in the build? I just found this thread and I am impressed with the engineering thus far. I have found that GB projects like this can takes years. I used to build them up from parts like this and have found the more you do the better it gets.