#21
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On a separate note about the Thunder Series:
@Earl is correct; Thunderhawk and Thunderbird were made with Centuri tubing (ST-7 and ST-10), and Centuri nose cones (PNC-76 and PNC-106). This can be verified on their plans here at oldrocketplans. ThunderRoc used Estes BT-60 tubing and an Estes PNC-60AH nose cone. Compare the part numbers from the ThunderRoc instructions to that of Mean Machine: http://www.spacemodeling.org/jimz/centuri/cen5340.pdf https://estesrockets.com/wp-content...EAN_MACHINE.pdf Both use body tube #30396 and Nose Cone #71043. That being said, from what I can tell, BT-60 and St-16 are so close as to be interchangeable. eRockets even merged the tube and nose cone categories on it's website. |
#22
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Since these newer short lived kits were produced by Estes in Penrose, I wonder if they would scan the plans for us?
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#23
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Quote:
BT-60 has a wall thickness of 0.021" ST-16 has a wall thickness of 0.020" Estes tubing was thinner walled only if you went smaller than BT-55. BT-55 and up generally have a wall thickness of 0.021".
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'Til next time, Mike Toelle NAR 31692 L1 SAM 0373 |
#24
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Quote:
Thanks for the comparison numbers Mike. Earlier this eve I did look at the catalog I.D. of each respective tube and saw that the Estes BT-60 was the slightest bit smaller I.D. than the Centuri ST-16. Verrry slight. But I did not do the full comparison on wall thicknesses. I was gonna try to pull out one of my opened Thunder Roc kits and compare that tubing to some boxed Centuri ST-16 I have and see how it matches up. But they are both very, very close for sure. Earl
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Earl L. Cagle, Jr. NAR# 29523 TRA# 962 SAM# 73 Owner/Producer Point 39 Productions Rocket-Brained Since 1970 |
#25
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Getting a lot of neat unknown Centuri info on this kit and general Centuri info on this thread.
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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, TURMOIL, FIASCOS, and HAVOC ! |
#26
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Quote:
So this eRockets reference is wrong? - https://www.erockets.biz/body-tube-sizes/ I wonder what they're actually selling, since they've combined ST-16 and BT-60: - https://www.erockets.biz/semroc-bod...g-sem-st-16180/ The numbers are inconsistent, 1.64"-1.60" would have a thickness of 0.020".
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Paul If we weren't all crazy, we would go insane - Jimmy Buffett NAR #87246 www.wooshrocketry.org |
#27
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Since most of my builds are actually old vintage kits, not clones, I can tell you even Estes body tubes are not all the same. The dia. and thickness of Estes body tubes have changed over the years. The differences are so small, one could not even tell. I have a vintage Centuri USS America and the ST-16 is exactly the same as the older Estes Bt-60. Also the ST-5 tubes are identical to some, not all Estes Bt-5 tubes.
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#28
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Here are images of the front and the back of the Centuri Firebird kit FYI.
Earl
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Earl L. Cagle, Jr. NAR# 29523 TRA# 962 SAM# 73 Owner/Producer Point 39 Productions Rocket-Brained Since 1970 |
#29
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I think the nosecone for cloning that is in the current Tazz kit.
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