CMP Canvas Splash Guard

[Phil Waterman]

Hi All

Rubber or Canvas mud flaps seems to be issue of when the truck was built, and were they ever replaced. My `42 Pat 13 C60S had rubber mud flaps while my `45 HUP had canvas front and rear.

In the process of my recent overhaul of the HUP I replaced the flaps with canvas copies of the originals. But I got the rear ones wrong they were neither stiff enough nor the canvas heavy enough. The result was that the air stream coming off the rear tires would fold them up were they would contact the tire resulting in a heavy thwack on the fender and very quick wear on the flaps.

My original canvas flaps have steel sewn into the middle and bottom in pockets. I copied these and sewed the flaps the same way so what I got wrong was the flaps were not stiff enough to be held down and not get caught by the air current off the tires.

For the next try I will try and use much stiffer canvas.

Cheers Phil

[Marc Montgomery]

yes the canvas should be heavywieght/thick.. typical "canvas" generally sold today is thin about half the weight needed

were you a Convoy subscriber? do you have the template and info for the rear flaps from the mag?

[Marc Montgomery]

As i try to remember..there may have been 3 layers to the rear canvas..front- back and a piece in the middle.... (??) As I recall there was straight stitching on one side and the X stitching on the other?????

Again proper details somewhere in an old Convoy issue

[Phil Waterman]

Hi Marc

I have the flap drawings, can't remember who sent them but I have them. Also have saved my original HUP and C60S flaps as future patterns.

Problem on getting the heavy canvas as used originally which was a heavy cotton canvas which was heavily treated with waterproofing that also had a anti-mold chemical. Recently purchased some new heavy canvas that look the same and was heavily waterproofed but before I could make new flaps it developed black mold. It had been sitting on the shelf in the shop in its plastic bag for about 6 months. So I have got to do some more checking to see if it was just the batch of canvas I bought.

Cheers Phil

[chris vickery]

Surplus 2-1/2 ton truck tarps are a great source of inexpensive heavy canvas.

[David Dunlop]

Check your local tent and awning company as well.


David

[Marc Montgomery]

even tent and awning material tends to be half the weight needed.

When I had the original 60cwt tarp made (and mudflap material)..it was by a company which existed in WWII.. and was the very heavy..treated canvas... the tarp weighed a ton!

and flaps were pretty stiff.. wish I had access to those Convoy templates...Phil may be correct there may have been two strips of stiffeners.

[BCA]

The samples that I have are 3 variations of the same design as posted by Mariano; probably just variations in canvas and perhaps various makers. The canvas is fairly typical of heavyweight tarp canvas but, as Marc said, there appears to be an interior layer of extra canvas or padding. A steel plate, 1.5" wide is sewn into the lower section. The padding and the steel plate give the impression of a thick, almost quilted mudflap.
... Brian