- Jul 14, 2015
- Reaction score
- Northern NJ
Who holds the certificate that keeps the class within the law.??
I have no clue
More than crazy. Irresponsible. Your next question is to ask your mentors whom among them has certification in either NAR or Tripoli and what level cert. Ask them and get back to us with the answer.Does this organization really provide so little guidance and mentorship to students that you have to get these basic questions answered on TRF? That seems pretty crazy to me.
Since these peeps are starting from scratch it needs to be dead simple. No 3D printing. 3FNC (three fins and a nose cone), LOC cardboard tubes, plastic nose cone, 1/8 inch birch plywood fins (through the wall for strength), quality epoxy (not BSI for this). Plywood AV Bay sled (cheap, easy). The key question is whether you want redundant deploy. I would suggest an Eggtimer Apogee (dead simple, only fires at apogee, weighs 5 oz.) with a Eggtimer Quark as backup. 2sLiPos, no 9V batteries. Make the rocket long enough that you can fly it drogue-less and use a JCLR for main release. JLCR will fit in the budget with the parameters above. The 1 Lb. payload can go in the payload section, location to balance the sections so drogue-less will very feasible.And if you want to do some 3D printing, a nose cone with provisions for mounting ballast is an OK choice, but not necessary if you're going to buy a kit. A better choice is designing and 3d printing the "sled" that goes in the electronics bay to hold the altimeter, batteries, etc. You can also 3d-print the charge wells that hold the black powder for ejection.
No , it is not worthwhile, it is indeed ridulous. Sluggo is right but you can not blame the kid. Best curriculum, freshman..intro to rocket dynamics, launch model rockets, Sophomore year go mid and high power with maybe this being final project. Since they are using Open Rocket and Roc Sim ,I am not sure how much physics they are learning. I rather see them take a Statics class and Dynamics class, both college level physics courses for engineers.Don't blame the student for seeking help, blame the organization that thinks throwing kids into the deep end like this with no adequate mentorship is a good educational strategy.
Maybe this is a worthwhile thing, but it sure doesn't seem like it to me. Does anybody have any experience with SystemsGo? (assuming that's who we're talking about.)
Concur, he can even show initiative but stating xy recommendations from this forum and he contacted the kit manufacturer clearly claiming his kit means the design criteria to easily achieve his 1 mile goal.May I also suggest not re-inventing the wheel. There are already kits available that can achieve this, designs that will do as you wish.
Since you are "locked into"having to use a Hypertek hybrid motor, let me ask a "dumb question" . . .I forgot to mention that for this class I have to use a hybrid engine that is purchased from the organization that runs the class. It is $330 for what might be the best option, which is the J190 with FX fuel grain. But it is the cheapest I can go with the engines. The next ones up are all $550 and that is just too much for the engine. What could I do with the J190?
Yes, they have all the necessary equipment to launch these things, although I agree that they are definitely a pain to work with.Since you are "locked into"having to use a Hypertek hybrid motor, let me ask a "dumb question" . . .
Does this organization have all of the necessary Ground Support Equipment ( Fillers, Solenoids, Oxygen tanks, Nitrous Oxide tanks, high-voltage ignition system, etc, etc, etc ), to actually launch Hypertek motors ?
Hypertek motors were the biggest "pain in the rear" to fly out of all the hybrid motors ever produced. ( Believe me, I know from personal experience )
I sold off all of my old Hypertek items, right after we won the BATFE lawsuit.
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