 |
Underside view of rear tandem axles showing Watts Industrial solid
rubber tyres. In this view, the bottom axle is the 'front rear' axle and
the drive to the axle pair is at the bottom of the photo. The splitter
differential is housed in the front rear differential casing. |
 |
Using a 'slice' of the chassis framework to test out the axle
mounting scheme. The white tube is English Net Curtain railing and forms
the outer jacket for a Dowden cable feed to the splitter diff's lock-up
clutch. |
 |
With the wheels removed, the tandem arm is revealed. This is made
from Exacto solid metal large diameter shafting. Also, the offset final
drive pinions are visible - these mate to 2.5" gear rings mounted one
per wheel. |
 |
The front-rear axle, as seen from the rear of the truck. Notice the
use of Exacto large diameter shafting to locate the rear wheels. A
Meccano double universal joint transfers the power to the rear-rear
axle. Also visible in this photo is the torque rod design that prevents
rotation of the axle. Using a screwed rod allows for fine adjustment of
axle mounting angle. |
 |
Looking inside the front-rear axle box, with the all pinion
differential removed |
 |
All pinion Splitter Differential and rev1 lock-up-clutch (triaxle
metal 19T pinion). You can see tje control cable feed and spring return.
This design was tweaked a little - see on.... |
 |
Splitter Differential in detail. Input is via a 2" hollow large
diameter shaft, to the large diameter bush wheel. Output is the two 19T
pinions. The 1.4" (rear) one is connected to the triaxle shaft that
passes to the rear of the diff casing. The 1/2" face 19T pinion meshes
with a 57T gear on the rod that has the helical pinion (see picture
above). It is this 1/2" pinion that drives the front rear axle diff. |
 |
The 'rev2' lock-up clutch design to give a more space saving bowden
cable feed into the diff casing from the outside. |
 |
Main differential design for both rear axles. Stuart Borrill 3/4"
thrust bearings used at each end, and also at both ends of the drive
helical pin's shaft. |
 |
And from the other end. This was designed to transmit large amounts
of power to the rear wheels, efficiently. |
 |
Final drive from the rear axle to the rear wheel's 2.5" gear ring.
This is a photo of one of the rear axles without the tandem bars etc. |
 |
Outside surface of the dual wide rear wheel. |
 |
Inside surface of the dual wide rear wheel. |
 |
Removing the outermost Watt's tyre reveals the wheel hub's 'fake'
lining. 4 screwed rods hold everything together. |
 |
The hub lining |
 |
the wheel hub from the outside. |
 |
From the radial direction, showing large diameter bush wheels that
rotate on the axle's large diameter dead axles. |
 |
Another view, showing the bush wheels. |
Go to Website Homepage
Webmaster: Phil@scmec.us
Want to know more about the Club?
