edward

I understand that – I wasn’t at the meeting so didn’t know if NCR was now pursuing a non-research avenue.Edward

Hybrids are just like solids, if they motor is certified by NAR, CAR or TRA then they are certified for use at a TRA or NAR launch. I just have motors (both solids and hybrids) that are of my own…   Read more»

I don’t know the reason a spool is stable, but you actually only need one of the plates, and it doesn’t matter which. I launched a few C6-5 spools, some with the front plate only, some with the back plate…   Read more»

How about for the highest impulse total rule be changed to a combined highest impulse in each motor class used. That way if someone always flew 90% impulse motors A-M and someone flew 90% A-L and then an 80% M…   Read more»

I believe it has been in process on the desk of the USFS for the past few years – I guess the cogs in the government work slow.Edward

He is around – though I believe he is taking a hiatus from rocketry.Edward

If you send my the plans I can scale them out in AutoCAD.Edward

The reading is taken near the nozzle. I know that is where the thermocouple was on my hybrid tests. It should be the hottest part of the burn because of all the mass that passes through.I’d really like to see…   Read more»

I love PL Premium for fincans. Makes construction a snap. I had constructed Bunny Thumper that way (5.5″ rocket, 1/16″ G10 fins). It worked great until I spacked it at Hartsel. The fins pulled off from the paper tube, but…   Read more»

The anodizing will help to keep the contact down. I’m planning on machining the ends so that there is .015-.020 between the plug and the wall on each side.I’m trying to avoid drilling a hole all the way through the…   Read more»

I’m going to be doing airstarts, so in effect a 2nd stage. I didn’t want to have to have a way to hold the igniters up at the top of the core and didn’t want to swiss cheese the back…   Read more»

Bruce,It is awesome that you like telemetry! I tried this January to build a unit that gave me temp/pressure/humidity but I just couldn’t get into programming it. I used to be able to program in assembly but I’ve lost those…   Read more»

1% does a very good job of accelerating the burn rate. I’ve found that you get a much more conistent propellant if you ball mill some KNO3 until it is very very fine, almost flour like. You then mix that…   Read more»

Very nice! I’ve built quite a test stands over the years and this one is my favorite, fires vertically for hybrids and was within 1% on the NAR data for my certs. I’ve also got a 5000lb one for those…   Read more»

If people want to test motors I’ll be more than glad to bring my test stand – I can go up to 220 lbs and 2500 psi, at up to 50kHz. It would be nice to have a static test…   Read more»

Are you using the 65/35 mixture? I found sorbitol much easier to work with than any other of the sugars. I bought my KNO3 from a supply house in Denver – it was .40 cents/lb in 50 lb bags in…   Read more»

Looks very good! What are you using? Sucrose? Also, where are you getting your KNO3?Edward

The template I saw was two blocks (2×6 lumber) that had a few holes drilled in them. The wire was run in there and held by another block on top. My friend has a similar setup and it has been…   Read more»

Greg,I’m going to make a few of the mechanically held brooms – working on getting a template. I found a couple cheap fish tapes tonight at the pawn shops and now just need to find the broom handle adapters.We’ll see…   Read more»

Yeah, extra incentive to be one of the first ones to see the fire and pick up the brooms from the fire fighting equipment stash. The stragglers will be left with the tanks :DForget getting to the rack, I’ll bring…   Read more»