how to make a early allison v - 1710 front gear case.

Personally, I would make a flange out of sheet styrene, the bulk of the case from basswood (easier to shape in 3D than plastic), then a third layer, the final prop bearing/thrust bearing, from another piece of styrene sheet.

I am trying to remember the shape of that case. If it were rotationally symmetric, you could mount the case on a chuck and turn it in a Dremel or drill, but I don't think it was symmetric, was it?  So you have a carving job.

I have long wanted to make a scratchbuilt Allison in large scale- say 1:12 or 1:8, but cannot find good scale drawings.  Even bought a great book on Allison (Vee for Victory) but there was no good drawing set in there (though lots of good pictures).

hi...don its 5-high her.

thanks for your reply. ya it do,es look rotationally symmetric ,,,to me aney ways .

it says in the book ..,,the c- series(v-1710-11/15s) ....the crankshaft was in the center . and the gear housing was a tapered cylinder...    so turning it in basswood  would work  and the styrene flanges,,,,,thats no prob.

 afterwords...         should i cast it ????,,(or),,, vacuum form it? 

i two would like to see a (v-1710 )  in 1;12 or 1;8 scale ........that would be soooooo bichen!!!!

5-high

hi...don its 5-high her.

thanks for your reply. ya it do,es look rotationally symmetric ,,,to me aney ways .

it says in the book ..,,the c- series(v-1710-11/15s) ....the crankshaft was in the center . and the gear housing was a tapered cylinder...    so turning it in basswood  would work  and the styrene flanges,,,,,thats no prob.

 afterwords...         should i cast it ????,,(or),,, vacuum form it? 

i two would like to see a (v-1710 )  in 1;12 or 1;8 scale ........that would be soooooo bichen!!!!

I wouldn't cast it or vacuform it unless you are planning to make a number of them.  You need to finish a pattern well anyway.  After you finish it, why not just use the part?  I finish with several coats of a thick bodied primer such as Krylon, then two or three coats of enamel.  Use basswood- its tight grain means it fills pretty fast with a good primer.

There is a 1:24 Allison in a car kit, an AMT funny car, forget the name. It is a later model, though.  I want one larger yet. I:8 would be great!  Williams bros. makes large scale models of aircooled radials.  We should get up a letter writing campaign to get them to do an Allison!  Maybe a Merlin too.