Got the recovery harness done.I found some really nice 9/16" tubular nylon webbing on Ebay for $0.18 a foot with shipping. I used 20ft of that, and a short length of some 1" wide Kevlar ribbon I had. I tied the two together with a water knot.
Captain Low-N-Slow
Got the recovery harness done.I found some really nice 9/16" tubular nylon webbing on Ebay for $0.18 a foot with shipping. I used 20ft of that, and a short length of some 1" wide Kevlar ribbon I had. I tied the two together with a water knot.
NAR 91107, Level 2
I think paint and I have an uneasy truce going.
Captain Low-N-Slow
I've seen firsthand how easily the attachment points on nose cones break, on even the heavier LOC cones. These nose cones from Mercury are very thin. I usually drill two holes and tie a loop of cord through them for the attachment point. But I worry about it tearing through the thin plastic, especially with the extra nose weight. You know me, if it's worth doing, it's worth over doing. So I tied knots in the cord and used some 1/4" plywood discs as washers. They didn't add hardly any weight, and they should help.
NAR 91107, Level 2
I think paint and I have an uneasy truce going.
Captain Low-N-Slow
Boy, this little guy turned out heavy. Fully loaded, without motor, it weighs 37oz! An H73 only gets it to 50 ft/sec off the rail. I might have to go with an H123, 70 ft/sec, if it's breezy.
NAR 91107, Level 2
I think paint and I have an uneasy truce going.
Shredding since 1997
Originally Posted by qquake2k
At 50 ft/sec I think that is really quite brisk. JMO, but I consider anything over 35 ft/sec fine. And any under, a light or no wind launch.
YMMV
Jeff Gortatowsky
Redondo Beach, CA. NAR 70988 Level 2
2013 Stats: Flights: 51
Approximate Total Impulse: 8,562Ns (Equivalent to a 67% M motor.)
Approx. Average Cost per flight: $15.47USD
Approx. Total RETAIL Cost: $789USD (Not necessarily what I paid)
Link will take you to: About me, The Flights, and The Fleet
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"(Scientific) Skepticism is not a set of beliefs, it is a set of methods for asking questions about reality." -- Doctor Steven Novella
Many rockets, no time.
I like!
Plays with wood, cardboard, and carpenters glue at home.
L1 will have to wait until 2013. Oh well.......patience is a lost virtue any-ways...
Thinks before building.
I bet you could save a not insignificant amount of weight by using 10 feet of shock cord instead of 20. Why so much?
2013 impulse burned: 5205.1 Ns
2013 impulse lined up to burn: ~56,445 Ns
Many rockets, no time.
Probably to get the rocket to slow down lots before the shock cord goes taught and threatens to zipper the tube.
I usually put in no less than 2 metres in my larger LPR's, and almost 3 in my MPR's.
L1 will have to wait until 2013. Oh well.......patience is a lost virtue any-ways...
Thinks before building.
Hmm. My level 1 cert rocket has about 4 feet of shock cord, and my Giga Drill Breaker rocket has about 6 feet. But then again, both are heavily overbuilt in order to survive hard landings on dry lakebeds. My level 1 rocket survived a 250 ft/s lake stake with zero damage aside from the nose cone.
2013 impulse burned: 5205.1 Ns
2013 impulse lined up to burn: ~56,445 Ns
Captain Low-N-Slow
I finally got to launch Plasma Fart yesterday. You can read about it in my launch report.
NAR 91107, Level 2
I think paint and I have an uneasy truce going.
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