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Armor/AFV: Modern - USA
Modern Armor, AFVs, and Support vehicles.
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M-764 earth boring truck
bankmannl
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Zuid-Holland, Netherlands
Joined: October 31, 2006
KitMaker: 649 posts
Armorama: 609 posts
Posted: Friday, June 03, 2011 - 04:28 AM UTC
Hi guys,

I'm thinking about conversing a m-35a2 truck to a m-764 earth boring and pole setting truck.
Now what could I use to represent an auger as used on this vehicle ?
I thought about a router bit from Dremel or even a small sized drill, but i'm not satisfied with the result.
Anyone got any suggestions ?


Frenchy
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Rhone, France
Joined: December 02, 2002
KitMaker: 12,719 posts
Armorama: 12,507 posts
Posted: Friday, June 03, 2011 - 05:13 AM UTC
Hi Gé

Maybe you could try to cut sections out of styrene "washers" similar to this metal one ( proportions and diameters can vary just like the real thing) :


and glue them end to end, like a spiral

(it would be much easier for me to explain this in French )

More reference pics in case you need some :
http://www.easternsurplus.net/285.html

HTH

Frenchy
MacTrucks
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Indiana, United States
Joined: November 12, 2006
KitMaker: 285 posts
Armorama: 228 posts
Posted: Friday, June 03, 2011 - 07:29 PM UTC
Actually, Frenchy, that's a pretty darn good suggestion. Make a couple of styrene washers with the desired outside diameter of the spiral and inside diameter to fit the shaft. Split them both and expand them out to spirals. You can fit them end to end and glue them to a styrene rod. Maybe only use a partial section of the second washer since the spiral doesn't appear to wrap a full two times. The add styrene sections for the gussets along with all the fiddly details.

One consideration that strikes me is if you spiral the washer the diameters will no longer be perfectly round. Options would be to rough in the OD (oversize) and ID (undersize). Expand to the desired spiral and use a temporary medium (putty?) to maintain the spiral while you drill the final inside diameter. Once assembled to the shaft you could turn the outside diameter to the final size. You might not need to go to this extreme, but thought I'd throw it out there.

What scale is your M-35A2 kit to be? 1/35 would be a good candidate for this method. 1/72 might be tougher to do with detail.

I don't think you'll find an auger bit small enough for 1/72 that's for sure. Even in 1/35 they don't seem like they would have enough pitch or twist to look right.

Frenchy
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Rhone, France
Joined: December 02, 2002
KitMaker: 12,719 posts
Armorama: 12,507 posts
Posted: Friday, June 03, 2011 - 08:26 PM UTC
Hi Kent

Thanks for completing my point of view Here's a TM drawing showing the auger details :


Frenchy
bankmannl
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Zuid-Holland, Netherlands
Joined: October 31, 2006
KitMaker: 649 posts
Armorama: 609 posts
Posted: Friday, June 03, 2011 - 08:46 PM UTC
Hi Frenchy, Hi Kent,

That is a @#$+ good idea !!!
Never came up with that one, so I think I will try it.
The scale will be 1/35 and I'm thinking about an M35a2 from AFV club or the old m34 tactical truck from Revell.
Don't know which one it will be !!

Thanks again,


HeavyArty
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Florida, United States
Joined: May 16, 2002
KitMaker: 17,694 posts
Armorama: 13,742 posts
Posted: Saturday, June 04, 2011 - 01:33 AM UTC
The M764 Boring Truck was built on the M35A2 truck. I would go with the AFV Club kit. It is much better detailed than the old Revell M35 as well.

Here is one from the USMC Museum at Camp Pendelton.
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