RCU Forums - View Single Post - Second 1/12 scale Panzer rebuild ( NOW FINISHED)
Old 10-14-2007 | 07:19 PM
  #5  
BIGMIG
 
Joined: Feb 2007
Posts: 2,546
Likes: 0
Received 1 Like on 1 Post
From: Amboy, WA
Default RE: Second 1/12 scale Panzer rebuild under-way

To continue on,we get to mounting the rear motor boxes.The posts that the original gear box was mounted on had to be cut off,and a flat sheet of plastic cut to fit for mounting the gear boxes on was installed.This piece is attached to the end of the battery box,to the very back of the tank body,screwed to the original cut off posts,and also glued to the sides of the tank.It is very solid and even made the whole back of the tank more rigid and less flexable.

The two motors were installed and power wires ran toward the front of the tank for later instalition.I cut four little strips about-1/2 by
1 1/2 inches long,drilled three holes in each one and glued two on each side of the battery box for wire holders for routing wires.
Next was to make extensions for the drive shafts for the motor boxes.I bought a short piece of 5/16 tube and a piece of 5/16 soft steel rod.The tube was measured and cut to the length I need for the extensions.The end that slips over the original gear box shaft was drilled and tapped to accomadate a set screw that will be screwed onto the flat of the original shaft to hold the extension in place and to make it turn with the original shaft.For the other end a proper length piece was cut and a flat ground on it to allow the sprocket to fit onto the shaft.Then a center hole was drilled and taped on the sprocket end of shaft for the mounting screw.That shaft was then slid into the tube and a hole was drilled through both the tube and shaft,then taped and a set screw installed to fix the short shaft to the tube so it is now solid.

After installing the extensions a piece of sheet plastic was cut to fit each side,and a hole drilled in each just slightly larger than the shaft to allow the shaft to fit through and this piece attached to the side of the tank and will stabilize each shaft extension and serve as a bearing surface for the shaft.Due to the slow speed of the turning shaft I think this will be suitable,and will have light grease applied for luberication.In the pictures I will post(looked at these,looked at the tank,they look like they are way out of alliengment but test runs on the track at full RPM of the motors and track seems to run true) ?????I think some is kind of an optical allusion and the back sides of tank where shafts passes through lean in slightly and give the apearance of the motors being out of alignment,but tracks seem to run great(go figure) ????

This is the point where I'm at as of today. Pictures to follow---- BIGMIG
Attached Thumbnails Click image for larger version

Name:	Pn35575.jpg
Views:	51
Size:	77.1 KB
ID:	783013   Click image for larger version

Name:	Yu63566.jpg
Views:	39
Size:	46.3 KB
ID:	783014   Click image for larger version

Name:	Ej14532.jpg
Views:	48
Size:	75.1 KB
ID:	783015   Click image for larger version

Name:	Pj18632.jpg
Views:	44
Size:	78.7 KB
ID:	783016   Click image for larger version

Name:	Fq89583.jpg
Views:	45
Size:	75.1 KB
ID:	783017