Scratch build US Army "Scout" Armoured recon vehicle XM800 T

Postby Sub » Thu Dec 10, 2020 5:15 pm

Hi Barry.
Thx for your continued interest, it will be different to all the ww2 German Armour thats true :haha: :haha: .
Started on the 20mm cannon.
Decided to do a rotating cylinder in a fixed outer cylinder for elevation and depression, no pivot point as such, works ok on the bench ( famous last words ).
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Last edited by Sub on Thu Dec 10, 2020 5:26 pm, edited 1 time in total.

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Postby Sub » Thu Dec 10, 2020 5:24 pm

Test fitting it before glueing up.
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Postby Sub » Fri Dec 11, 2020 10:30 pm

Trial fit in the uncompleted turret.
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Postby Sub » Sat Dec 12, 2020 3:57 pm

Hi.
20mm cannon, rotating shell casing ejection port and barrel evacuation blower added.
This rotates in the housing in Sync with the barrel elevation and depression.
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Postby Sub » Sat Dec 12, 2020 4:21 pm

Hi,
Oops forgot to add the shell casing ejection slot end plates :{
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Postby HERMAN BIX » Sat Dec 12, 2020 11:08 pm

Now that’s details !
If my wife was there she would ask “ why??, why put yourself through the hassle, who will see it”
I always answer “ I will” !!
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Postby Sub » Tue Dec 15, 2020 6:42 pm

Hi,
Thank you Mr Bix, you are quite correct.

A few more details added in the cartridge ejection area, and some armour plating added too. Just got to add some bolt heads etc.


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Postby Sub » Tue Dec 15, 2020 9:28 pm

Finally fixed the rotating cylinder elevation and depression mechanism in place and finished off the fairing in of the whole assembly on both sides, also started to fit the cover plates over the ejection port etc, and made a start on the twin level turret roof, still got to fix the barrel cooling cylinder in its final place concentric to the barrel itself.
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Postby midlife306 » Wed Dec 16, 2020 2:11 am

Not boring at all Sub, keep it up


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Postby Sub » Fri Dec 18, 2020 6:32 pm

Hi,
Thank you Mr Midlife for your interest, i was begining to wonder :thumbup:

Been finishing off the basic turret and the removable hatch to allow access inside, the top is unusual as its a stepped roof going off at an angle towards the rear, where the commanders hatch is elevated over the gunners side of the tank, still have to do all the periscopes and both hatches etc and a raised secondary machine gun platform on the gunners side.
There are a few places on the panel edges that will require a little plastic filler where the edges have fused but overall i am reasonably happy with the panel fit and sharp edges etc
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Postby HERMAN BIX » Fri Dec 18, 2020 10:01 pm

That is most definitely a "stealth" AFV !
Such complex angles, surely cant just be for shot deflection...............can it ?? :shh: :shifty: :shifty:
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Postby Sub » Sat Dec 19, 2020 2:29 pm

Hi Mr Bix.
Thank you for your continued interest.
Regarding your comments on stealth design.
This tank was produced in the mid 1970's was highly successful in trials so much so that the US Army ordeted 2 to 3000 of them before the conclusion they were so impressed with it, then out of the blue the project was cancelled much to their dismay , what was the replacement......the slab sided Bradley ???.
It just so happens that also in the mid 1970's DARPA was investigating stealth technology and the first stealth aircraft the HAVE blue flew in the wait for it .....mid 1970's.......then the F117 stealth fighter we now know was operational in 1983.

Maybe, just maybe :/ the XM800T was cancelled to protect the forth coming stealth aircraft and F117...just a thought, but the time lines fit perfectly and could offer a reason why the cancellation of production of the XM800 T amazed so many people.
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Postby abramsky » Sat Dec 19, 2020 10:13 pm

Hi guys
I don't think stealth technology has anything to do with. IFVs are not a tank and to reduce weight they are usually made of aluminum (let's say very simply). As in WWII vehicles, appropriate armor plate angles are used to improve the ballistic capabilities of light armor (similar to WWII tanks since the T34 - as you surely know). For armored land vehicles, more important than lowering the radar signature is mobility, firepower, reduction of thermal signature and silhouette. To achieve this, it is much easier to cover the vehicle with a suitable paint that absorbs radar waves and reduces infrared emissions, and to use multispectral coatings such as SAAB Barracuda or the Polish Lubawa system:
http://www.lubawa.com.pl/pl/kamuflaz-i- ... az-mobilny
As I know XM800T project was canceled because it did not give anything more than what the M113 offered, and as a result, another project was started. In that way the M2/M3 Bradley was born.
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Postby Sub » Sat Dec 19, 2020 10:44 pm

Hi.
Thank you Mr Abramsky, of course you are correct but nothing like a little speculation to get people to look at a thread :haha: .
The weopons system was greatly better than the M113 with the Auto 20mm, fully stabalised, night vision cannon etc, all comes down to money in the end though. :thumbup:
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Postby abramsky » Sat Dec 19, 2020 11:11 pm

There is nothing wrong with speculating :)
Yeayh. You're right about turret, but perfect turret is not a whole vehicle, and the chassis, unfortunately, did not provide increased mobility and enough space for the soldiers and, more importantly, for their equipment (and this was getting bigger and bigger). I think that thanks to the XM800T program, a better (but not perfect) Bradley was created and its turret with a 25mm Bushmaster cannon resembles that of the XM800T in several places.
Ps. Great scratch build. I'm impressed. Good job :)
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Postby Sub » Sat Dec 19, 2020 11:23 pm

Hi,
That was certainly the XM800's issue was that it could not transport 12 equipped troops as you say, and the good parts went on to be incorporated into the Bradley vehicles.

Trying out the turret onto the hull, looks more like the XM800T now thats for sure, still lots more to do.
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Postby BarryC » Sat Dec 19, 2020 11:44 pm

HERMAN BIX wrote:Now that’s details !
If my wife was there she would ask “ why??, why put yourself through the hassle, who will see it”
I always answer “ I will” !!


Yep, that is the reason! :thumbup: :thumbup:

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Postby Exhibitedbrute » Sun Dec 20, 2020 9:57 pm

That’s an interesting theory on the cancellation of the project but, at first glance the general hull shape and angles (though not as tight) do show some similarities to the f117 so it’s quite plausible.

Another complex build. How do you have the patients

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Postby Sub » Mon Dec 21, 2020 8:57 pm

Hi,
Mr Brute, as you say a complex build, i have always had patience.
Added the gunners side extension and additional armour,
Now onto making the elevation and depression mechanism, the twin rotating cylinders don't have a central pivot point, so i will have to get creative.
Regards.
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Postby Sub » Tue Dec 22, 2020 3:46 pm

Hi.
Worked out the mechanics of the elevation and depression ok.
Few pics of it, central gun level then elevated and depressed,
It was fairly simple once you took accout for the arc of the servo arm which meant that the pivot point increased and decreased during elevation and depression, it also had to pivot around the servo arm shaft to avoid any lock ups.
Works well and is smooth in operation.

The clear cable going into the gun " breach " end is fibre optic cable for the gun flash.
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