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  #1  
Old 10-17-2016, 10:43 PM
leftover leftover is offline
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Default Estes Space shuttle 1284 question

Bought a open partially built 1284 off of eBay.
Looks good but had a couple of questions I need help with

The lower slip in fin parts are missing. instructions say they are ST78 tubes with cr8 centering rings. Can't find anything that matches that number on semroc or anywhere else. Does anybody know what size will match up?

Also, this is my first attempt at a vacuform kit where it is the main assembly with multiple pieces glued to eachmother( much as I love the Star Trek Enterprise it's the main reason I never built the Estes kit. )The orbiter seems a little brittle not surprising considering its age. What is the best glue to use on vacuform? Should I try to do some internal bracing(I know weight is a factor)? And doesn't seem to Ben much surface to glue on.... 🤔Any guidance would be appreciated.
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  #2  
Old 10-18-2016, 10:00 AM
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Use Tenax 7R plastic welder on the vacuform pieces. Line them up carefully with tape and wick it in along the edges. It forms a solid joint very quickly.
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  #3  
Old 10-18-2016, 10:49 AM
aeppel_cpm aeppel_cpm is offline
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Good to know. I also just got a 1284 off of eBay. I had one as a youth, so I've built it before - but the details escape my memory at this late date.
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  #4  
Old 10-18-2016, 01:54 PM
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Quote:
Originally Posted by leftover
The lower slip in fin parts are missing. instructions say they are ST78 tubes with cr8 centering rings.

ST-78 would be an 8" length of Centuri ST-7. I wouldn't be surprised if that's what it is because the Centuri ST-7 was thicker and more robust than the Estes BT-20. Estes and Centuri were owned by the came company when the Shuttle came out and some parts did cross over in the late 70's. The body tube will be Semroc ST-7 and centering ring would be Semroc #7 to #8 based on your numbers. I'm at work so I can't put eyes on mine to check it.
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Old 10-18-2016, 08:55 PM
leftover leftover is offline
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Quote:
Originally Posted by ghrocketman
Use Tenax 7R plastic welder on the vacuform pieces. Line them up carefully with tape and wick it in along the edges. It forms a solid joint very quickly.

Looks like Tenax is discontinued
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  #6  
Old 10-19-2016, 07:19 AM
jetlag jetlag is online now
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The Tamiya thin plastic glue is good stuff, as well. Works just like the Tenax, but is available.

Allen

Last edited by jetlag : 01-13-2017 at 06:40 AM.
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Old 10-19-2016, 08:24 AM
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Haven't tried "Same Stuff", but it's advertised to be just like Tenax 7R. I've never tried it or ProWeld because I still have about a half bottle of Tenax left.
http://www.micromark.com/same-stuff...fl-oz,9002.html
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Old 10-19-2016, 10:14 AM
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"Same Stuff" is the SAME as Tenax 7R and has exact same properties, very fast plastic 'welder' that does not gap-fill at all.
It is much better than the Ambroid Pro-Weld or any of the Plastruct Liquid Cements.
It is in the same class as the Tamiya stuff, but much cheaper.

Don't even consider the GARBAGE put in a bottle Testor's calls Liquid Cement.
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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL
, if you have to ask what is "NORMAL" , you probably aren't !

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ALL systems are GO for MAYHEM, CHAOS, and HAVOC !
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  #9  
Old 01-12-2017, 03:35 AM
leftover leftover is offline
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So purchased this kit off of eBay as a partially built version.

Somebody had already cut out the orbiter half and misc parts and glued most of the together except the upper and lower sections

In addition the have sanded the lower section to a point that actually sanded awa the top,of the Chanel for the attachment lugs ion the center line.
Front of lower section does not line up well with the top.

What now

I had put off this kit because of my lack of experience with vacuform now I remember why.
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  #10  
Old 01-12-2017, 09:31 PM
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When I couldn't get Tenax, I tried the Plastruct Plastic Weld and I liked it alot. I used it on vacu-form V-2 fins and it worked great. It also worked well on regular plastic when I was rebuilding Sandhawks.
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