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Old 02-01-2011, 11:24 AM
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blackshire blackshire is offline
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Default Joust-1 pre-launch photograph

Craig, although the fins in your drawings don't reflect the Joust-1 vehicle's actual "pure delta" fins (a good close-up, pre-launch photograph of Joust-1 is attached below), those clipped-delta fins from the NASA "blue book" Joust-1 drawing *are* (I'm pretty sure) accurately representative of the upper-stage fins of OSC's two-stage (Talos-Sergeant) Starbird vehicle.
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Last edited by blackshire : 02-01-2011 at 11:42 AM. Reason: This ol' hoss done forgot somethin'.
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  #12  
Old 02-01-2011, 11:56 AM
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CPMcGraw CPMcGraw is offline
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As I worked on the sketch, I could see there were differences in the outline versus the final vehicle. The nose cone is another obvious inconsistency. The outline shows a blunt tip (rounded), while the final flight configuration had a full sharp-tipped conical.

What I suspect is the outline represents the base vehicle (Castor), and thus is good for getting the length and transition sections of the boost module. Those portions would be 'locked' to the developers, as it was a COTS (Commercial Off The Shelf) item. Fins could be changed, as could the final payload, but not so much the motor section.

I did look at that photo after putting the sketch together. With a bit more refining, we should have something closer to the actual shape soon.
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  #13  
Old 02-01-2011, 01:10 PM
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I agree--I think they "refined" (reduced the size of, and changed the shape of) the Joust-1's movable steering fins from the Starbird upper stage (which required more "control authority" than Joust-1 because the Starbird had longer and heavier payloads, plus a massive Talos first stage).
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Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
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http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
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