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  #71  
Old 11-16-2007, 10:16 AM
Rocket Doctor Rocket Doctor is offline
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I forgot to add, the shock cord included is 30 inches long, the main body tube is 27 inches long, using the 1 1/2 rule for the shock cord length, the shock cord should be a minimum of 40.5 inches long, I would say, at least 45 inches long or longer.

For anyone building this kit, I would strongly suggest increasing the length of the shocok cord to prevent the dreaded "Estes dent" I can't see you beautiful rocket wrecked after off of your work because of a short shock cord.

Remember, a shock cord is not a sling shot, you don't want it to come flying back for any reason, Vern had mentioned to me, "It doesn't matter how long a shock cord is, as long as you can fit it into the body tube".

Good luck to everyone building the 1350, and please, report your building, painting and launching here.........photos and a report.
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  #72  
Old 11-16-2007, 01:33 PM
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Royatl Royatl is offline
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Quote:
Originally Posted by excelsior_rocketry
No, The ST-20 ALMOST fits inside the ESTES 2" tube... not quite.

I have no problem with the thicker tube, but this model will be going on a diet to fly on E9s!

Ph



You mean the other way around don't you? ST-20 should be just slightly larger than the hbt-2000.
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  #73  
Old 11-16-2007, 02:01 PM
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Sorry... yes.

Ugh TGIF!!
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  #74  
Old 11-16-2007, 04:16 PM
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Rats. I was hoping an ST-20 would have the same OD because I already have some.

FSI's 2" tube was the same as the ST-20. Estes doesn't have anything close.

BMS has 34" lengths of ST-20 tube couplers. OD is 1.997". Things are looking lighter already.
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  #75  
Old 11-16-2007, 04:20 PM
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Rats. Those couplers may be even thicker than the Estes heavy tube. Now I've started thinking about peeling the inside of the Estes tubes.
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  #76  
Old 11-16-2007, 04:37 PM
Rocket Doctor Rocket Doctor is offline
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The measurements that I gave were from my tube on the prototype.

I will be getting the exact body tube dimensions soon, and will post them, there weren't any dimensions on the origianl bill of material.

The motor mount tube measurements are as follows

HBT - 1000
ID 0.950

OD 1.000

Wall thickness 0.025
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  #77  
Old 11-16-2007, 04:39 PM
Rocket Doctor Rocket Doctor is offline
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Please post your comments on the new thread regarding the 1350 so we can keep all the info on one thread.
Thanks
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