SU-85M / SU-100 build

This section is for builds that are not strictly Tamiya or Heng Long. For instance, replacing the electronics from a WSN or Matorro, or even a scratch-build.

Postby Markocaster » Wed May 16, 2018 3:41 am

Hello all,
It’s been ages and ages since I posted anything. So I just picked up a preowned SU-100 project and thought if I posted it would encourage me to work on it faster :)
It’s a trumpeter upper and lower hull, a resin top, and various metal detail parts. Here are a few pics as I got it.
ImageImageImage
So I started doing some research and found the kit I have is somewhere between an su-85m and su-100 just very minor differences but my mantlet seems to match an 85M more than 100
ImageImage
I began cleaning the parts and cut a roof from styrene, then cut out holes and added the hatches. I also added a little height to the copula.
As you can see it was missing a few bits Sassgrunt came to the rescue (thanks Mike ) and I should have some more parts soon.
That’s it for tonight
Cheers Mark


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Postby c.rainford73 » Wed May 16, 2018 3:52 am

Looks great Mark. Will be following along closely, a big fan of this tank :thumbup:
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Postby Raminator » Wed May 16, 2018 11:00 am

Nice find Mark, this'll be a good one. Looks like a WSN lower, Trumpeter upper and An-Bri casemate? I've got one of these kits too, I'll be following along with interest.
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Postby Markocaster » Tue May 22, 2018 11:03 pm

Image
I have made a little more progress, it’s still very rough but the roof is on and hatches mostly in place. I added the fuel drums on one side and did a little texturing with mr surfacer.
I rebuilt the rear engine deck with the extra trumpeter parts , looks much neater and I have an etch grill to go on as well. Anyone spot any glaring errors so far lol ? I still have quite a few little detail bits to attach and then on the the lower half , That’s a whole new adventure lol more on that later.
Cheers Mark


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Postby c.rainford73 » Wed May 23, 2018 3:01 am

Looking good Mark :thumbup:
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Postby Raminator » Tue May 29, 2018 9:26 am

Solid progress, it's starting to look the business. Are you planning on building traverse and elevation for the main gun? The An-Bri SU-85 kit I have has a solid block of resin for the gun mount, so I don't know how easy it would be to work in. It looks like yours is hollowed out for elevation at least, though.
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Postby Markocaster » Thu May 31, 2018 3:47 am

Raminator wrote:Solid progress, it's starting to look the business. Are you planning on building traverse and elevation for the main gun? The An-Bri SU-85 kit I have has a solid block of resin for the gun mount, so I don't know how easy it would be to work in. It looks like yours is hollowed out for elevation at least, though.

I am just going for elevation, it has had a little work done to it by the po.


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Postby Markocaster » Thu May 31, 2018 3:51 am

Image
Evening everyone. The above bits are gears off this tank and the red arrows point to the bits that spin freely when the blue part is held still / on the tank.
So what happens it goes forward at a creeeep and then the gear part starts spinning/slipping. Any ideas on a way to stop the spinning? Thanks and sorry for all the technical terms above lol



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Postby Raminator » Thu May 31, 2018 9:48 am

If the two red parts are rotating together, (i.e. the final drive gear spins the sprocket in the same direction) that's normal.

If they spin independently of each other (i.e. the gear can turn in the opposite direction to the sprocket), that's a problem.
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Postby Markocaster » Thu May 31, 2018 4:11 pm

Raminator wrote:If the two red parts are rotating together, (i.e. the final drive gear spins the sprocket in the same direction) that's normal.

If they spin independently of each other (i.e. the gear can turn in the opposite direction to the sprocket), that's a problem.


Yes sir they can turn in opposite directions. There is a small gold bit next to the gear but it cannot be tightened



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Postby sassgrunt » Thu May 31, 2018 11:20 pm

If I remember correctly, once that white gear started slipping on the shaft; there wasn't anything you could do to fix the problem. It was one of the weak points on the design of the drivetrain, and people who upgraded the gearboxes also make their own shaft and keyed it inside the drive sprocket with a pin. I checked my spares box and had hoped that I had two of them I could send you, but as it turns out, I only have one. Came off a stock WSN years ago and was never used, so it will at least cure ONE side of the drivetrain. I mean, your Su-100 may only drive in circles then, but at least it will do so reliably!

I can get it off to you tomorrow, if you want it. But, since it won't cure the problem (unless someone else has one they can send you), it might be worth considering just replacing the gearbox and drive sprockets altogether with Heng Long ones. Not terribly expensive on eBay. -Mike

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Postby Markocaster » Fri Jun 01, 2018 8:04 am

sassgrunt wrote:If I remember correctly, once that white gear started slipping on the shaft; there wasn't anything you could do to fix the problem. It was one of the weak points on the design of the drivetrain, and people who upgraded the gearboxes also make their own shaft and keyed it inside the drive sprocket with a pin. I checked my spares box and had hoped that I had two of them I could send you, but as it turns out, I only have one. Came off a stock WSN years ago and was never used, so it will at least cure ONE side of the drivetrain. I mean, your Su-100 may only drive in circles then, but at least it will do so reliably!

I can get it off to you tomorrow, if you want it. But, since it won't cure the problem (unless someone else has one they can send you), it might be worth considering just replacing the gearbox and drive sprockets altogether with Heng Long ones. Not terribly expensive on eBay. -Mike


Mike , hi and thanks a million for your help I knew there would be issues w this one, and I bought it to learn. I have fun with the exterior of the tanks but as for the electric and running aspect I still have lots to learn . I think I have my Clark board figured out lol!
But good news, looks looks like we may have a tank club in this area soon. It’s been a while and I am dying to have a go at battling my tiger 1 finally thanks so much for all your help. I am going to experiment with this and if I don’t have any luck I am going to pick up a Taigen lower hull and make a battlefield relic out of the later
I hope this local club happens I need to meet some local guys and learn lol there must be some close to me ???
Thanks again and all the best !
Mark



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Postby sassgrunt » Fri Jun 01, 2018 8:44 am

Hey Mark. Yeah, if you can finance it, I think that Taigen is the way to go for an upgrade. I bought one of their metal hulls for the Trumpeter Su-100 kit, and even though it will take some adapting of the parts, I hope that the end result will prevent future mechanical headaches.

Your build is coming along great, and remember my offer if you want to use this one for a battlefield wreck and start another one.

It's also great that you have a club in your vicinity. (And ironically, it's probably the closest one to me as well, so have fun and I will try and enjoy it vicariously through you). Ha. -Mike

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Postby Markocaster » Tue Jun 05, 2018 3:23 am

Thanks Mike ! I ordered the Taigen lower and metal idler/sprocket for it :)
I am really looking forward to having a local group, hopefully it works out.
Still plugging away at the SU-100,
And now I have most of a t34 in parts I am going to turn that one into a battlefield relic.
How is it I started with 2 projects and now have 5 in various states of disrepair lol


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