#21
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When folding a streamer, make the width of the folds less than the width of the body tube
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#22
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for fun, or for competition?
Quote:
IIRC, that was the limit set for NAR streamer duration events. Wider being better, the 10:1 thing was to prevent someone flying a streamer shorter and wider. This kinda forced people to stay within reasonable bounds and "evened up" the playing field. For plain ol' sport flying, make your streamers any size or shape you want. Longer has definite advantages if you are launching over bush or tall grass, as a looong streamer will often drape over the tops of surrounding foliage and be much easier to see.
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NAR 20602 used to be "powderburner" in another life |
#23
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as to BT-60
If your streamer is big enough to upset the stability of the rocket in descent mode, even a BT-60 will generally land just fine. If you can make it work out so the rocket falls on its side, all you need to do is build strong fins (that is, choose smart shapes, use appropriate thickness and material, etc).
You can often get away with NO streamer----just tether the separated nose cone to the rocket and it will tumble down. Called "nose-blow" recovery, this is an old system that everyone nowadays seems afraid to use.
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NAR 20602 used to be "powderburner" in another life |
#24
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I've gone as big as the BT55 Vigilante sustainer with crepe paper streamer. I always launched it in a pasture, so it had fairly soft landings. I don't think I'd do it if the model was bigger and/or I was recovering on hard ground with little vegitation and sure wouldn't on pavement.
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I love sanding. |
#25
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EVERYTHING I launch somehow finds pavement, water, or a tree.
If I launched a rocket in the Sahara, it would find pavement, water, or a tree. If I launched a rocket on the moon, it would find pavement, water, or a tree. If I launched a rocket on an A8-3 from the geographic center of a 1000 acre sod farm, it would find pavement, water, or a tree. Etc.
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Never trust an atom. They make up everything. 4 out of 3 people struggle with math. Chemically, alcohol IS a solution. NAR# 94042 SAM# 0078 |
#26
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Quote:
IIRC Wiley Ley in his book Rockets, Missiles and men in space claimed there were rockets launched at White Sands after WW2 which used the nose blow method of recovery.
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Bernard J. Herman Ohio RLS Starport Sagitta Rockets email bherman@sagittarockets.com NAR # 97971 SR What's your idea on the best way to change Washington D.C.? Let us know at the Cantina Sagitta Cantina We're looking for a few good Catos, please tell us about any you may have had. Survey of Anecdotal Malfunctioning Engines or S.A.M.E. |
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