A project or two
 

A while back I was looking for motors with a shorter length than stock Hank Long or Tamiya Mabuchi
types. The reason for it is shown below in a photo. I have been fiddling with a Heng Long KV-1 with
Asiatam lower hull. I wanted power. I bought a set of steel gear boxes from Phil and initially fit a stock
set of MPI / Maxx Product reductions. They didn't fit in the narrow space afforded by the hull; not only were
the combined length of motor and reduction unit too long they actually overlapped space. This wouldn't do at all.
Hence the search for short can motors. Not finding them easily I decided to take another approach. I modified
the reduction units to make them .125"+ narrower by reducing the gear hubs and pinning them to newly made
shafts. I also shortened the three support spaces by an appropriate amount. I replaced the units' mounting
screws with modified ones screwed into the mounting holes from within ( heads thinned ) so that I could
use nuts to mount the entire unit on the gearbox frame. All of the brass bearings have been soldered to the
gear box frames.

I'm using a RX18 with David's battle system and a Futaba 7 channel receiver. The model weighs a just around 12
pounds using zinc Mato track.

The model is incapable of going fast and will push my heaviest chair around the kitchen. Turns are great and it exudes
power. Just what I wanted! I'm making a few more mods to the upper hull then paint and an appropriate Russian slogan!

Other project to follow.

Jerry

RE: A project or two
 

Interesting solution! Did you have to use a lathe to make the changes?

RE: A project or two
 

As alwaysagreatsolution to a problem. Very nice work. I too have the asiatam KV chassis,made into a KV-2 Beautpanzer. I have a set of reduction boxes in mine from phil w/ETo's 480 motorsand tamiya electroncis. I agree with you. Not fast, but the power is amazing.

RE: A project or two
 

Well you have made the KV-1 what it is supposed to be a "Beast". I would love to see a video of this in action. Nice job.


Cheers,
Wade

RE: A project or two
 

Yes I did use a lathe to trim all the parts and make the new shafts. I used a small square file
to cut flats on the new shafts for the set screws of the small pinion gears ( much less work and less costly than
using my mill ). I also used a drill press to drill the pin holes through the gear hub and shafts. I used small ( very small) steel brads for pins.

I'll try to put up a small video assuming it doesn't rain on my running area before I get to it.

I was quite cross at first with the cramped (gearbox) internals but as it turned out well I'm pleased. I'm hoping to finish the wiring and upper hull mods over the next few days. I'm not wild about the switch hole on the back of the lower hull as it looks pretty wonky but as it is there I'll leave it and it is a convenient way to power up the model.
As I'm not interested in smokers and bb guns I've left those out or in the case of the gun - disabled it basically it's a dumb bar now, the sole purpose of which is to engage the main gun elevation...

Jerry

RE: A project or two
 

Nice work. I've seen those units but they have a larger output shaft and must be turned down.



~ Jeff