CMP Ford F-AT Quad...help?

[DaveW]

The current state of affairs...

[DaveW]

I need some more help!!

But first, the current state of affairs:




Okay...

Fuel Tanks....I assume the Quad Gun Tractor has two tanks, both the same.
Are they the same size as the larger, longer vehicles?

What are the rough dimensions of the tanks?
Mine are scale 10" x 10" by 31" long...which I think is too small.
I'm also not sure if they are close to square, or are they rectangular?
(wider than tall?)

And, what is the position of the filler neck.
I've got pics of Tanks with filler necks in different places...I don't know what tanks go with what vehicle.

Exhaust system...
my current plan is to create a y-pipe under the motor, connecting to the left side pipe.
Then straight back to a straight inline Silencer, with a 90 degree outlet pipe after that.
The Silencer appears to mount under the frame inside of the left fuel tank.
But I am unsure of where the exhaust outlet sits.

Can anyone answer any of this?
I appreciate it if you can.

[Harlé Sylvain]

Hello
Good job!
Yes they are two same size tank , 26x30x82 cm , they are each side along the frame, the filler neck is short and strait .

Hope it helps

[Tony Smith]

Originally Posted by DaveW

I need some more help!!

Fuel Tanks....I assume the Quad Gun Tractor has two tanks, both the same.
Are they the same size as the larger, longer vehicles?

What are the rough dimensions of the tanks?
Mine are scale 10" x 10" by 31" long...which I think is too small.
I'm also not sure if they are close to square, or are they rectangular?
(wider than tall?)

Both of the fuel tanks on any CMP are the same size as each other, BUT the Gun Tractors (both Ford and Chev) and the C60X 6x6 have larger 20 Gallon tanks (12" wide x 13.5" deep x 40" long), while all other CMPs have 12.5 Gallon tanks. These were 12" wide x 10" deep x 32" long (Same as the metric dimensions given by Harlé).

[DaveW]

excellent info...thank you both!!!!!!!!

and that photo helps too.

So, the Quad tanks are close to the same dimensions, except longer.
I may stick with my current design, until I have the body in place.
If I can enlarge the tanks, I will, when I know exactly how well they fit.

[DaveW]

So, everything is on hold at the moment.
I just received information that the back end Towing hardware on my Chassis is NOT a Ford setup.
Supposedly its a Chevy FGT setup.

Which is funny because I just photographed a Chevy Gun Tractor with something entirely different.
(see the attached photo)

I'm not arguing...I'm no expert...thats why I ask for help.
But I'm hoping I will receive some more information (photos) to help me decide what to do.

Redesigning the kit (and model) is not a problem.
Rebuilding this prototype is.
I am able to cut off some parts...some times...
but there might be too much to modify, and as a result, might require building a whole new Frame.

Which, at this point, I really don't want to do.

But, I never release a kit without at least one attempt to build what is in it.
So if I change something like this, I'll have to test build it.

Sometimes there are interchangeable parts...was this set-up ever used on a Ford?
...if so, I am good to leave it in place.
But if its definitely a Chevy specific set-up, then it will have to be changed.
The axles and engine in this FGT are definitely Ford type.

[DaveW]

Thanks Bruce for your help in sorting this out.

So, the bottom line is, that I referred to a couple of photos of an FGT chassis
for the setup at the rear (Hitch/Spring mount, Towing Cable Roller and Guides, Brackets and Plates, etc)

and the reference was obviously a Chevrolet built FGT chassis...not a Ford.

I have been doing a careful job of comparing Ford and Chev chassis,
and trying to make sure I am following Ford designs.
I am already aware of many of the differences.

And yet, I did not check to see if the Ford setup was the same as the one I was designing.
Which it wasn't.
There appear to be many variants out there, but the original Ford and Chev chassis'
appear to each have a "factory" setup of their own.

Luckily, it was not a big fix...
I was able to surgically remove the parts I had already designed and attached to my prototype build.
The removal damage was easily covered with some new surface layers printed on lightweight paper.

The new parts design is much simpler with less parts to build and install.
And it went together quite easily.

I'm glad I didn't have to start from scratch and build an entire new Frame!
But I have cut apart this Frame one too many times making changes,
and as a result my Frame Rails now have a bit of twist in them.
It didn't seriously affect installing the new Towing parts, so I am good to go.
Hopefully this is the last major adjustment.

[DaveW]

Still searching for some info on the exhaust System. Anyone?

As I mentioned before, I'm guessing on a straight cylindrical Silencer, mounted somewhere inboard of the left Fuel tank.

I think its a Y-pipe under the the Oil Pan, leading to a straight (but angled downward) exhaust pipe (straight into the Silencer).

After the Silencer, I have no idea how short/long the Tailpipe is or where it exits.

I have yet to decide if I will include exhaust pipes, since they will be very narrow pipes at this scale, with many sections/parts (because of all the bends and twists)
and subsequently hard to build out of paper.

I would like to at least include a Muffler though, so I'd really like to see a photo of that.

I don't know if Chev is different than Ford, but I'll look at either!...?

[Older photo...still got the Chevy Hitch equipment...]