File:Wimpy Red ✒ BALLS (4712341978).jpg
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Mixing up some Wimpy Red on a precise scale, with the recipe on the wall of the <a href="https://www.flickr.com/photos/jurvetson/sets/72157600956531468">RocketMavericks</a> propellant lab. It should make for a brilliant red <a href="https://www.flickr.com/photos/jurvetson/872758351">night launch</a> at BALLS this summer. The red Fe2O3 in the tupperware is a burn rate catalyst, making it a bit less wimpy, and coloring the propellant red. This is unrelated to the red flame that it will produce. That comes from the Strontium Nitrate, a metal salt that becomes SrCl during the burn, and after the Sr ions become excited in the plasma, they drop to the ground state emitting a photon of a precise wavelength, in this case, a brilliant red. (I wrote a beginner’s <a href="http://scienceblogs.com/photosynthesis/2009/05/rocket_propellant_types.php" rel="noreferrer nofollow">primer on propellant chemistry</a> for ScienceBlogs) The rocket fuel is a traditional powdered aluminum mixed with Ammonium Perchlorate for the oxidizer. The binder is combination of Hydroxy-terminated Polybutadiene (HTPB) with Isodecyl Pelargonate as the plasticizer, and a little CAO-5 Antioxidant to extend the shelf life. Mixed as a thixotropic fluid in a paint can shaker under vacuum (photo of that setup below). If this wasn’t wild enough, Toma has four tons of graphite for turning custom nozzles for the high-ISP propellant under development. And after helping us with this last night, he then drove 6 hours to BlackRock, and is testing an P motor with some purple woodie propellant this morning (here's a <a href="https://www.youtube.com/watch?v=DpcN4QjyhmI" rel="noreferrer nofollow">video</a> of the M motor test... 1/8 the size of a P motor and 1/16 the ultimate Q... and <a href="http://www.rocketpedia.org/index.php/Clotho_Project" rel="noreferrer nofollow">Clotho</a><a rel="noreferrer nofollow"> will have four of these special Q motors... so 64x that test in total impulse)</a> |
| Date | |
| Source | Wimpy Red ✒ BALLS |
| Author | Steve Jurvetson from Los Altos, USA |
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- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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This image was originally posted to Flickr by jurvetson at https://flickr.com/photos/44124348109@N01/4712341978. It was reviewed on 29 December 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 21:09, 29 December 2021 | | 2,361 × 1,676 (1.45 MB) | Siloepic (talk | contribs) | Transferred from Flickr via #flickr2commons |
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