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  #11  
Old 08-22-2018, 03:15 PM
DavidQ DavidQ is offline
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If the tube you are looking for is 2.618” OD, yet the BT-80 is only 2.6" OD, you could consider adhering one or more layers of printer paper, or glossy paper, to the outside to increase the diameter by .018".

I've done that on special occasions. Spray adhesive on the tube and the paper works great.

To get the .018", you could use one wrap of paper that is 9 mil thick, which is in the range of photo printer paper, or a couple thicknesses of photocopy paper, which are around 4.5 mil thick.
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  #12  
Old 08-22-2018, 05:01 PM
A Fish Named Wallyum A Fish Named Wallyum is offline
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Quote:
Originally Posted by lgr
Thanks for all the replies so far. And it makes me happy to know that my first question here is one that isn't straightforward to answer

I think you'll find that we can make even the most straightforward question an adventure.
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  #13  
Old 08-22-2018, 05:01 PM
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Earl Earl is offline
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The S-IVB (third stage) tube in the 1/100 scale Saturn V kits (the original Centuri kit and the later various Estes re-issues) would use the same size tube as the one in question here.

If memory serves, the tube included in the Saturn V kit is a bit longer, so it would have to cut shorter.

So...if you (or some other kind soul) has a 'partial' Saturn V kit that includes this tube, you could use that for this 1b build.


Earl


P.S. - Possibly Estes cusromer service might be able to supply you a 'replacement' Saturn V tube for use, since I think they are supposed to be re-issuing that kit soon.
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  #14  
Old 08-22-2018, 05:20 PM
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ghrocketman ghrocketman is offline
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+1 to what Bill just said above.
We could complicate boiling a pot of water.
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  #15  
Old 08-22-2018, 07:01 PM
BARGeezer BARGeezer is offline
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Quote:
Originally Posted by Earl
The S-IVB (third stage) tube in the 1/100 scale Saturn V kits (the original Centuri kit and the later various Estes re-issues) would use the same size tube as the one in question here.

If memory serves, the tube included in the Saturn V kit is a bit longer, so it would have to cut shorter.

So...if you (or some other kind soul) has a 'partial' Saturn V kit that includes this tube, you could use that for this 1b build.


Earl


P.S. - Possibly Estes cusromer service might be able to supply you a 'replacement' Saturn V tube for use, since I think they are supposed to be re-issuing that kit soon.



The original 1/100 Estes Sat 5 (#K-36) and the latest reissue (#2157) both use the BT-80 tube for that stage. Presumably the iterations in between do the same. I think this is done for expedience, since it's far more economical to use a readily available standard size tube than a specialty sized one. The difference is miniscule. The kit in question uses the BT-82 tube, per JumpJet. So, short answer, all you have to do is sand the two centering rings for the slightly smaller diameter and the BT-80- should work as a substitute.

As far as requesting a specific part not listed in their webpages or catalogs, I tried a couple of years ago to order the 3.42" tube used in the 1/45 Estes LJII, since I wanted to clone the old Mercury Atlas. The response was that since they no longer have a dedicated parts department, that would not be possible. So I made my own tube.
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  #16  
Old 08-22-2018, 07:58 PM
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Earl Earl is offline
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Quote:
Originally Posted by BARGeezer
The original 1/100 Estes Sat 5 (#K-36) and the latest reissue (#2157) both use the BT-80 tube for that stage. Presumably the iterations in between do the same. I think this is done for expedience, since it's far more economical to use a readily available standard size tube than a specialty sized one. The difference is miniscule. The kit in question uses the BT-82 tube, per JumpJet. So, short answer, all you have to do is sand the two centering rings for the slightly smaller diameter and the BT-80- should work as a substitute.

As far as requesting a specific part not listed in their webpages or catalogs, I tried a couple of years ago to order the 3.42" tube used in the 1/45 Estes LJII, since I wanted to clone the old Mercury Atlas. The response was that since they no longer have a dedicated parts department, that would not be possible. So I made my own tube.



Well, darn.

Yeah, I've built both the Centuri Saturn V and the 1b and have unbuilt kits of each. I also have the Estes k-36 and several of the later iterations (built the 30th anniversary version back in '99).

I just compared tubes from the various kits and they are different than the Centuri tube.

Now here's the interesting comparison. I just pulled out one of the very early 90's Estes re-issue of the Centuri Saturn 1b and it DOES use the same tube as the original Centuri kit...NOT the BT-80. Go figure.

I've done more intimate comparisons on the original Centuri 1b and the Estes re-issue of same, because I want to build one of the Estes re-issue 1b's I have as a operating two-stager. Knowing that those two kits shared the same tube, I had assumed Estes used that same tube in their Saturn V K-36 and later iterations. Not so.

Earl
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  #17  
Old 08-22-2018, 10:21 PM
lgr lgr is offline
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Thanks for getting to the bottom of this, folks. Here are pics of my crushed tube. It's only on one side, but it's pretty creased. I'm sure I could work with it if needed.
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  #18  
Old 08-22-2018, 10:27 PM
BARGeezer BARGeezer is offline
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Quote:
Originally Posted by lgr
Thanks for getting to the bottom of this, folks. Here are pics of my crushed tube. It's only on one side, but it's pretty creased. I'm sure I could work with it if needed.


That would be a PITA to repair. Easier to sub a BT-80, I think you'll be happier with the end result.
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  #19  
Old 08-23-2018, 07:24 AM
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ghrocketman ghrocketman is offline
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That tube is NOT usable. It is a piece of junk worthy only of a bonfire.
I'd definitely use a BT-80 over that thing, sacrificing a few thousandths of scale accuracy.
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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 !

Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !
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  #20  
Old 08-23-2018, 08:15 AM
lgr lgr is offline
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Ok, I'm not worried about the scale as much as everything fitting together properly. I'll order up a bt-80. Thanks!
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