Apollo space capsule stability tests - Supersonic Small Scale Project
Added 2018-04-14 02:34:26 +0000 UTCWe test out Tim Hamilton's Apollo capsule-shaped projectiles to see if this shape, fired BACKWARDS would fly in a stable manner.
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Here is a small lower mach number supersonic tunnel <a href="https://www.youtube.com/watch?v=_9FJgxwnD6A" rel="nofollow noopener" target="_blank">https://www.youtube.com/watch?v=_9FJgxwnD6A</a>The tunnel used for the reentry tests of the Apollo and other capsules, had to go to 30+mach not just 1 or 2. When you get into hypersonic ranges like bullets [see mach number needle lower portion of picture] heating becomes a problem. Now the shape of the capsule was designed to move the shockwave and friction forward off the surface [bow wave or detached shock rather than a oblique shock] to prevent melting like this... even at about 7-8 mach. <a href="https://www.youtube.com/watch?v=RChlt5wdqBs" rel="nofollow noopener" target="_blank">https://www.youtube.com/watch?v=RChlt5wdqBs</a>
Kimball Rustin Roy Scarr
2018-04-27 06:04:49 +0000 UTCBasic supersonic shockwaves, and shape <a href="https://www.youtube.com/watch?v=-tpwj5rA-OQ" rel="nofollow noopener" target="_blank">https://www.youtube.com/watch?v=-tpwj5rA-OQ</a> Transition from subsonic [non-compressible air flow] through transonic conditions [transitional air flow] and into supersonic [compression-able flow] <a href="https://www.youtube.com/watch?v=W2Hfukjqv7I" rel="nofollow noopener" target="_blank">https://www.youtube.com/watch?v=W2Hfukjqv7I</a>Why is the capsule designed the way it is? It has two different flight modes a) launch and b) reentry where stability is important. How to do this design one side for on stable situation and design another for the second. <a href="https://www.youtube.com/watch?v=j493HvCkMbM" rel="nofollow noopener" target="_blank">https://www.youtube.com/watch?v=j493HvCkMbM</a>
Kimball Rustin Roy Scarr
2018-04-26 15:16:28 +0000 UTCThe silly putty isn't THAT sticky. It has to stick a LITTLE just so the slug wouldn't fall out of the shell prematurely.
TAOFLEDERMAUS
2018-04-14 22:40:16 +0000 UTCThat's the plan. I wanted to recover as many as possible. That will probably be this month's give away, and I usually throw in extra stuff too.
TAOFLEDERMAUS
2018-04-14 22:39:26 +0000 UTCthanks!
TAOFLEDERMAUS
2018-04-14 22:38:25 +0000 UTCLike Dannys t-shirt, Bush Company is a gas
2018-04-14 21:59:23 +0000 UTCJeff, I'm thinking that if you had put some corn starch or baby powder between the slug and the silly putty it would have separated cleaner and not had a sticky release, which is probably why a few of the putty slugs tumbled.
Jon Ellwood
2018-04-14 12:26:54 +0000 UTCVery cool guys!
Robert Hanlin
2018-04-14 09:35:07 +0000 UTCWould love to have one of those for a souvenir!
Dave Raines
2018-04-14 08:58:09 +0000 UTCGeoffs question of the day....to Danny..."do you have a knife ?" haha
2018-04-14 08:22:29 +0000 UTCPatreon give away? One of those "re-entry vehicles" would be quite a prize ;) ...
2018-04-14 07:06:30 +0000 UTCAwesome work! The water tests were a highlight for me, I wonder if that would be useful for other rounds?
LukeTheJoker
2018-04-14 05:19:14 +0000 UTCGreat video. Loved that history/background intro Thanks guys
TheNetsrac
2018-04-14 04:03:59 +0000 UTCInteresting. For something with no spin it was fairly accurate.
Mark Trombley
2018-04-14 03:05:31 +0000 UTCWe shall see...
tubleweed_jac
2018-04-14 02:35:02 +0000 UTC
