- This topic has 13 replies, 5 voices, and was last updated 18 years ago by
Bruce R. Schaefer.
Bruce R. Schaefer.-
Posts
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Geof Givens
Okay, this is a follow-up to my previous thread. I am going to attempt L1 on that crazy rocket. To those of you who replied earlier, I need to get specific.
If all goes well, I’m looking to borrow:
29/180 and 29/240 cases
And looking to buy:
H165R-S and H180W-SIf the first flight is bad, I’m looking to then borrow (for my X-calibur):
38/240 case
and looking to buy:
H(any W, R, or T)-M, probably whatever is cheapest.Can I make specific arrangements to reserve such motors for purchase, and to meet with one or more of you to borrow the case(s)?
Please email me (geof@lamar.colostate.edu) your phone # or very specific info about finding you at OF. I will only be there on Saturday, and will have a lot of kids’ launches to supervise, so my time for squeezing in L1 + 2 more launches of this rocket is limited, especially since I will need to work around your schedule if I’m borrowing your case.
Finally, I’m of the impression that I can register for OF+NCR membership on-site, and I’ll bring a NAR membership application to OF. I’ll also bring a L1 cert form if there is such a thing. Correct me if I’m mistaken about any of this.
Thanks in advance. If you would rather phone me than vice versa, feel free 970-282-3482 evenings. (Expain it’s about rockets so my wife doesn’t hang up on you thinking you are a telemarketer!)
I look forward to officially joining the club.
Geof
MikeS
You can borrow my 29/240 RMS case.
I will be there all day Friday and Saturday. I am in no hurry
You can use the case any time. I will be doing most of my
launching Friday.There can be an anouncement made over the loud speaker
to get all of us to You.Have a great day
Geof Givens
Thanks. Hopefully that will be my second launch. What is your last name, and/or what do you and your biggest rocket look like?
Geof
Bruce R. Schaefer
Geof, there are so many in the club who can certify you. I’ll be RSO Saturday afternoon, so I can’t then. I plan to get their Saturday morning ~10 AM. I’ll be available just before and after my RSO duties. I’d be very happy to do it. Go to our Prez, Joe Hinton; he can point out everyone who can do it. Just remember to bring your paperwork–yes, there is a L1 cert form, and give it to Joe after you’ve certified. He gets the fastest response from NAR.
MikeS
mike shinn
click the www tab….You can see me and my rockets.
JetMechQC
geof, I have a 38-240 you would be welcome to use.
Brian K
Geof Givens
Thanks; how can I get in touch with you or find you?
And, who do I contact about buying the right reloads?
Bruce R. Schaefer
And, who do I contact about buying the right reloads?
GLR’s Tim Thomas (tim4glr@aol.com). He always has quite a range of reloads, but you should e-mail him ahead of time, just to make sure he has what you need. Just some quick tips… make sure you have vent holes (if you don’t, I always have a cordless drill and some bits), a good harness (no elastic–though technically you can, just not strong enough for high power), positive motor retention (some may let you cert with just masking tape, I would prefer that you use some kind of hook or commercial retainer). On a L1 attempt, my rocket shot out the motor casing, and it landed within 60 feet of Nadine Kinney. I NEVER flew without proper retention after that. Make sure you know your CG/CP for stability, that you can hold your rocket by the nosecone or upper section and it doesn’t separate under gravity, that you’ve simmed your rocket to know what delay to use: S? M? or L? Tim has the RDK delays to change to whatever you need. And, a parachute big enough for a safe recovery, but not too big to where it flies away. Did that. 🙄 There’s no written test (only for L2), so it’s just present your rocket, whoever certs you should ask most of the above questions while looking your rocket over, then just launch. Your rocket must have a successful, safe flight without popping your nosecone off… Did that, too. 🙄 What’s traditonal and kinda cool is that after you’ve done your L1, the response will be “Welcome to high power!” L2: “Welcome to higher power!” L3: “Welcome to highest power!” It’s a fantastic journey, Geof.
Geof Givens
I don’t think I’m going high enough quick enough to need the hole. Around 750ft on H165.
About the nose cone…a question. Yes, I know that rule of thumb. My rocket has a ton of nose weight: the nose weighs as much or more than the rest of the rocket. I’m nervous about the motor having enough ooomph to eject the nose. Thus, I’d rather have the nose looser.
Also, due to the concavity of the body shape, the body actually narrows slightly from the parachute storage area upward to the nose cone seam. Thus, the parachute must slip through a slightly increasingly constricted space to deploy successfully. Therefore, I want that nose cone popped with maximal force to help pull out the chute. Don’t want it to barely scrape off.
On the other hand, the shoulder is narrow (0.5in). The fit is fairly smooth and loose, but not perfect.
Any of this alter change your advice on nose snugness?
Also, what is the default time for the “S” delay? I need about 6 sec.
Everything else you suggest is done, in spades. Thanks for the advice…I’ll write to Tim tomorrow.
Geof
Ken Plattner
Make sure the charge from an H180 (about 1.3 g) is enough to pressurize the tube so the nose blows out along with all of the laundry. I had one rocket where the supplied BP was not nearly enough. The nose popped out, but nothing else. Keep the volume of the paylod pay bay to a minimum – only what is needed to hold the chute, harness, nomex and shoulder of the nose. Use a BP calculator to confirm.
Geof Givens
MikeS
Bruce R. Schaefer
JetMechQC
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