File:Wimpy Red ✒ BALLS (4712341978).jpg
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DescriptionWimpy Red ✒ BALLS (4712341978).jpg |
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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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. |
29 December 2021
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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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Camera manufacturer | Canon |
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Camera model | Canon PowerShot S90 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/2 |
ISO speed rating | 250 |
Date and time of data generation | 19:24, 17 June 2010 |
Lens focal length | 6 mm |
JPEG file comment | AppleMark |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | QuickTime 7.6.6 |
File change date and time | 09:42, 18 June 2010 |
Y and C positioning | Co-sited |
Exif version | 2.2 |
Date and time of digitizing | 19:24, 17 June 2010 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 2 |
APEX exposure bias | 0 |
Maximum land aperture | 2 APEX (f/2) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
Color space | sRGB |
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Focal plane Y resolution | 9,643.8356164384 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |