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For discussions related to cold war era Russo-Soviet armor.
BTR-70 and BTR-80 hull differences?
AotrsCommander
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Posted: Wednesday, December 06, 2017 - 06:14 AM GMT+7
I am working on making a CAD model for BTR-80, starting from my model of the BTR-70. As is often the case with trying to work on variants, I'm struggling a bit to synch up the technical drawings and the model.

In this case as usual the measurements you can find are little help, since they have such a wide margin for error. The BTR-80 is consistently listed as being 0.1m wider, though it is difficult to see why that is.

My understanding is that the BTR-80 (hull) is basically[1] the BTR-70 hull, only with the rear section modified (i.e. the centre chamfer taken out and the rear squared off and so on).

(Obviously, the turret and the external details are different.)

Is this correct, or is the BTR-80 actually a slightly different (but almost indistinguishable to my eye on pictures and photos) shape?

The internet is sadly lacking any good side-by-side photos for a good comparison.

Can anyone shed any light on the subject?



[1]I.e. the basic shape and geometry of the hull.
Jacques
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Posted: Wednesday, December 06, 2017 - 10:19 AM GMT+7
Quick response is, they are two completely different hulls.
AotrsCommander
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Posted: Wednesday, December 06, 2017 - 12:18 PM GMT+7

Quoted Text

Quick response is, they are two completely different hulls.



I know the rear and the top surface is different, and some of the surface details are different (where "surfaces details", for the scope of CAD work means "firing ports/lights/doors/splash plates/lights/panels" etc[1]) but are the other parts of the hull - i.e. the underlying shape and size of the hull geometry - the same shape (I.e. the front of the hull, the position of the wheels etc)?

I have been unable to find any images showing a direct comparison to compare, and if the front or the sides, for example, are a different shape[2], it is pretty subtle to my naked eye.

So, if the shape is indeed different, how is it different?



[1]It's not like regular modelling where door holes or something are important, on a CAD model all that is essentially just pasted onto (or into) the hull surface.

[2]Aside from the obvious changes to the upper surface and rear.
seanmcandrews
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Posted: Thursday, December 07, 2017 - 02:25 AM GMT+7
Hi Alex,
the drawings in the following link appear to be the same that originally appeared in M-hobby , their drawings have a good reputation for accuracy. I'd link you directly to the issue they appear in but from what I can see the PDF is no longer available.

Sean

http://www.armorama.com/modules.php?op=modload&name=SquawkBox&file=index&req=viewtopic&topic_id=150885&ord=&page=1
RLlockie
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Posted: Thursday, December 07, 2017 - 03:30 AM GMT+7
M-Khobbi published 1/35 drawings of the BTR-70 in its 01/2006 issue and of the BTR-80 in 05/2006. I have never measured (or seen) a real one of either but that should give you a starting point.
AotrsCommander
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Posted: Thursday, December 07, 2017 - 05:15 AM GMT+7
Righto; thanks all, I think what information I've gotten is enough to work from.

(And the links sean mcandrews provided also had a further link to another BTR-80 walkaround, and you can never have enough walkarounds, so cheers for that!)