wanted: Chev CMP chassis views

[Hanno Spoelstra]

Originally Posted by Tony Wheeler

I find the best way to think about CMP frames in general, be they Ford or Chev, is to consider the siderail as 3 separate sections: front section, rear section, midsection - the latter being straight channel. All front sections are identical, and all rear sections are identical - it's only the midsection that varies, and only in length, according to wheelbase. No doubt this greatly simplified production, and may have been standard industry practice in truck manufacture.

Niels was so kind to measure up the chassis of his CGT and C30 trucks - please refer to the attached drawing from the Chevrolet manual to which I added red lines at datum points "C", "D", "E" and "F".

Chevrolet CMP Frame dimensions_redlined.jpg

He reported the following frame height dimensions on the outside of the C30 frame rail:
C: 20 cm
D: 20,5 cm
E: 18 cm
F: 14,5 cm
On the CGT it was bit hard to get the measurements, but from what Niels could tell they where the same as on the C30.

As the distance between "C" and "D" is the same on all chassis (transfer case is fitted to cross member "D"), this means the difference in chassis length is in the mid-section "D"-"E" as follows:
C30: 150 cm
CGT: 73 cm

The difference between the two is 77 cm. I would expect it to be equal to the difference between the wheelbases: 134" - 101" = 33" = 83,8 cm, so there may be some more measuring up needed.

Tomorrow I will post some of the pictures Niels made.

Hanno