Kubelwagen Rear
The chassic plate extends to the rear underneath the gearbox, which it's screwed too via the lower mounting point. The gearbox is an old Tamiya Hotshot unit. A pair of aluminium braces attach to the rear of the body.
The steering servo lead runs in the body tunnel from the front to the back.
Large hole cut in upper body, you can also see the top gearbox mounting point.
In the well at the bottom of the picture are the 4 screws from the aluminium brackets, I filled this well with epoxy to make it stronger. When the model is completed the weight is much more than the suspension springs were designed for, so I had to fit large spacers at the top of the damper to compress the springs as much as possible given the small suspension travel when running.
Cut the centre of the wheels out and then cut the centres out of the original Hotshot rear wheels.
Also grind down the central hole in the wheel until it's level with the surrounding wheel.
Make up a guide to hold the wheel central within the wheel, this goes down the central hole.
Like so.
On the outside of the wheel you can see 5 fake bolt heads, drill a small hole centrally through each bolt head, this will also come through the wheel centre which you can see above.
Now you can grind each fake bolt head down a bit, drill the hole out to fit 8BA bolts, these bolt through to the wheel centre and a washer and nut can be fitted.
The procedure for fitting a wheel to the axel is - mount wheel centre onto axel, screw up locking nut, place wheel onto wheel centre, fit all 5 bolts and then fit washers and nuts (this bit is very fiddly as you can only access one bolt at a time from underneath the gearbox)
You can see the five new bolt heads fitted
The rear of one of the bolts can be seen here.
These will need thread lock compound or they will work loose.
Spacer inserted around damper to compress spring, with tie-wrap to stop it coming off.
For the motor I used a Falcon 5 pole '540 size' low rev unit, with a 14 tooth pinion. To give slow speed and more torque.
Looking into the rear of the body, you can see the combined receiver/ESC unit, servo reverse circuit (battery has been removed for picture).
Note velcro pads either side to hold rear engine door on. Also two bolt heads that hold the body too the chassis.