#51
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Cylinder assembly question
Carl,
Curiosity has killed more cats than I can count, but I can't help myself here... When you insert the ceramic nozzle into the casing, do you start from the top down, or just a quick insertion from the... short end? And, does the ceramic nozzle have a bulge in the middle, or is it more wedge-shaped?
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Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635 |
#52
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Carl McLawhorn NAR#4717 L2 semroc.com |
#53
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So the ceramic is not "heat hardened", but "pressed", similar to a piece of tablet candy? As in several thousand pounds of pressure? This is a "dry" clay with a very low moisture content, yes? The product "fluidizes" as it's pressed.
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Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635 |
#54
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It is dry ceramic and presses to about 40% of its original volume with 10,000 psi. Does anyone know where Vern got his original "ceramic clay"?
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Carl McLawhorn NAR#4717 L2 semroc.com |
#55
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I've been in manufacturing and sales for over 30 years - inventory is EVIL - but a neccesary evil. It was rumored about 10 years ago that Estes' long range plan was to offer only one delay per size (ie the only C motor would be the C6-5 ect.) which really kills inovative design Quote:
Don't get me started about soccer moms! Dale Greene |
#56
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OK Carl, I give up. And as long as you're answering that one, how about an explanation of how "port burners" got their name. |
#57
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I first saw Port-Burning (PB) in the 1965 Centuri catalog. They called their engines made on the Coaster machine port or center burning solid propellan grain. Estes, I think, always just said center burning. I did not hear core burning until recently, probably associated with Aerotech.
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Carl McLawhorn NAR#4717 L2 semroc.com |
#58
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Now that would be cool! I'm not sure if that wouldn't make tracking more difficult, though. My grandson loves the redline, green gorilla, etc motors. Having that kind of availability during boost in the smaller motors would be very cool, though. I have been asked that question about rocket motors (from people who are unfamiliar with rocketr) on many occasions. James |
#59
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Yep to all that! I especially loved the B14 motors. James |
#60
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Exactly! James |
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