new2hpr

You could try, but it would probably require a long “on” time, possibly latched. Most altimeters just give a blip of current to pop an ematch.Everyone post results from any experiments! 8)Ken

Incidentally, the reason for the attempt is supposedly the concern over hydrazine tanks. ….I read that it was estimated to be 1000 gallons of hydrazine. Talk about a nasty rainstorm below. I’d think that if they at least burst the…   Read more»

I haven’t done it, but a SU composite booster should light a BP sustainer, but not the other way around.

How hard is to get Thermite? Sounds like good stuff.

Thermalite sounds about like what you’d need for that 2-stager “hard to light” project! :DKen

Tim,Sounds like Plan A might just be back on line. In my case, I don’t want the central to light the outboards, but I think we could shield the dipped ematch/Thermalite combo with basic masking tape. The ematch lines would…   Read more»

For maximum entertainment value, I say keep it like it is. There is probably a point of diminishing returns. How many D motors can D motors lift? I know it’s been tried in the hundreds. Success or failure… either would…   Read more»

Very nice work.Now Warren, if you’re going to that much trouble for the thrust ring, why not just machine in the male threads half of the retainer as well? Save you all the extra bolts… Maybe make the nut…   Read more»

That does seem to be a helluvadeal, but I noticed that it does NOT include the Hypertek tanks. Any idea what THEY run, and I assume that the volume of the tank dictates what impulse range you’re in.How are these…   Read more»

Art,Since the magazine is no longer in print, can you scan and post the MHM article/photos?Ken

Very nice shop setup. I’ll have to see if I can use the bandsaw here at work when I start on my PR Competitor3 (my Christmas present to myself… do you see a trend here?)For PR components, I highly recommend…   Read more»

The fireball has worked well for me (3 out of 4 times, anyway 😕 ) The 4th flight had an early eject and the chute pulled the harness quickly down the side of the airframe before the ball even hit…   Read more»

I’d certainly be interested. I have a much greater fear of losing a rocket than destroying one.A long-range “here I am” call without HAM licensing would be sweet. I’ve been avoiding the temptation to join the 1 and 2 mile…   Read more»

As a recent victim of said zipper, let me say I’ve done a bit of reading and there is no ‘perfect’ solution… It’s just you against physics. I had a reasonably long harness (~20′), but with an early deploy at…   Read more»

I think there are a few different “rocket curses” out there.I nailed my L1 on the first try, flew it on a couple more I’s with perfect deployment at the top, then had Art put a beautiful paint job on…   Read more»

I have yet to do my first DD, but from everything I’ve read, drogue in the lower, main by the nose is the standard method. The shock (even if mild) of the drogue opening would probably shear the pins with…   Read more»

Well, so much for the ONE person who knows anything about rocketry at Hobbytown, and knows what to stock in the stores. Might as well rename it RC-town, now…:xKen

As long as you’ve still got sufficient room for the recovery system, the longer motors should be no problem. There’s plenty of support in 14″ of motor mount tubing. Heck, longer motors help move the CG forward, too. (unless you’re…   Read more»

Conway,I see now that the Rockets Magazine (Liberty Launch Systems) has a bunch of PR components and kits IN STOCK. Maybe they have what you need.https://www.libertylaunchsystems.com/apps/wpisa.dll/LLS/Components/PerformanceRocketryKen

Tim,I probably won’t be up this weekend, but if I can get someone to pick them up, how much are your Fuddruckers igniters for 24mm motors? How long are the leads? I’m trying to build up a battery pack (probably…   Read more»

OK, so it’s probably sized by OD. That goes well with mailing tubes. I’ll try it and see.Ken