#21
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Paul If we weren't all crazy, we would go insane - Jimmy Buffett NAR #87246 www.wooshrocketry.org |
#22
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Paul If we weren't all crazy, we would go insane - Jimmy Buffett NAR #87246 www.wooshrocketry.org |
#23
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Rms
Actually, I could really use some help with RMS assembly. I've flown plenty of Aerotech SU, and have bought a couple RMS cases and reloads, but would like to practice up with midpower loads before cracking my L1 later this summer...
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Dean Fox NAR #53946SR ---- "Wherever you go, there you are" |
#24
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RMS are relatively simple to assemble if you follow the instructions that come with the reloads*, that said, I'm reasonably sure that most of us would be willing to assist, you just need to ask. some things you should pack
1/2" masking tape celophane tape hobby knife emery board o-ring lube. rex *they vary a bit depending on which reload you're doing but, the basic assembly remains the same. |
#25
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That wouldn't be acceptable though for a L1 cert flight. At least one of the motors used has to be an H or I. Mike |
#26
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True, but he didn't say anything about a certification flight...
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www.wooshrocketry.org NAR Sec. 558 Look us up on YouTube: http://www.youtube.com/user/guytogo75?feature=mhee unstable by design |
#27
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Maybe I'm wrong, I took it to mean certification because of the previous comments. But the other thing is, to require HPR certification the total installed impulse of all the motors would need to be over 320Ns (160 .01Ns or more per single motor). Mike |
#28
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Beyond 160, you're into H impulse - you're taking this waaaay too seriously.
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www.wooshrocketry.org NAR Sec. 558 Look us up on YouTube: http://www.youtube.com/user/guytogo75?feature=mhee unstable by design |
#29
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Along with something to wipe any grease or lube off of your hands before handling the delay grain. Baby wipes work very well for that. Bill
__________________
It is well past time to Drill, Baby, Drill! If your June, July, August and September was like this, you might just hate summer too... Please unload your question before you ask it unless you have a concealed harry permit. : countdown begin cr dup . 1- ?dup 0= until cr ." Launch!" cr ; Give a man a rocket and he will fly for a day; teach him to build and he will spend the rest of his days sanding... |
#30
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That's true, for a single motor. But not for a cluster of motors. From the NAR site: Who Needs HPR Certification? A person needs High Power certification if they: 1 Launch models containing multiple motors with a total installed impulse of 320.01 Newton-seconds or more, or 2 Launches models containing a single motor with a total installed impulse of 160.01 Newton-seconds or more, or 3 Launches rockets that weigh more than 53 ounces (1500 grams), or 4 Launches models powered by rocket motors not classified as model rocket motors per NFPA 1122, e.g.: a Average thrust in excess of 80.0 Newtons b Contains in excess of 125 grams of propellant c Hybrid rocket motors So clearly you could launch a combination of motors up to 320.00 Ns w/o needing HPR certification. Now, I don't know if there would be anything else you need to consider. I always thought that the total installed propellant weight limit for non-HPR was 125g, 62.5g per motor. The way it's stated above the max limit per motor is 125g. At any rate I don't think I'll be clustering 145 A3's anytime soon! |
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