Activity

Okay, now I’m NOT going to miss this one! (Ken, thanks for the memb card!)

There’s also an online practice test for the NAR L2 test. I’m only a NAR member at the moment, but personally I’d prefer the TRA L2 test. From what I understand, you can take it multiple times the same day,…   Read more»

Thanks guys for the info and David for the practice test.

Heres a practice test//www.astralisrocketry.com/Knowledge_2.htmlDavid

Per recent posting from Ken Good, it looks like the 3 part Tripoli form from the notebook is going to be a thing of the past and the TRA cert forms will also be downloadable from the web “real soon…   Read more»

For NAR L1 Certs, you’ll need fellow NAR members, L2 or better, to witness and sign off on the important High Power Certification Application. Then you’ll need to pass the written NAR L2 test which can be administrered on site….   Read more»

You can do both on the same day with TRA. I did. After a successful L1 flight you will need to take the test and as long as you pass you will need to make a successful L2 flight.

8) You can do both in the same day. Call Joe for the test, and motors you will need. I would be glad to sign off on your flights! Tim

Come to the dark side Luke…… Oh sorry…. something came over me.Art, Joe, Tim and James are TRA if I remember correctly, there are probably more. You will need to contact one of them to make sure they will be…   Read more»

I used PL Premium Polyurethane in my PML Sudden Rush, which I built with an extended motor tube to accept 4 grain CTI 54mm motors.PML Sort of warns against using a K load in this kit. It’s their Quantum Tube…   Read more»

In my PML QT kits for everything except the external fin fillets with very good results. I also have used foam in concert with it as urethane foam should adhere to it rather well.Sort of feel foaming a fin can…   Read more»

Just a note. My ‘Mad Dog’ fell from about 6000′. Seven feet of itwas in the ground, had to be dug out.What was left….And what was held togeather, was heldwith PL Premium.Most all points of glue were broke. EB portions…   Read more»

Edward,I have also had some thoughts about the offset mass on the moonburner motors. While there is no doubt that the unburned propellant mass and gas flow down the offset core produce some type of moment arm as you describe…   Read more»

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»

As I usually fly minimum diameter, I always orient the core between fins and I like to use carbon airframes on moonburner shots, as I know carbon is a better insulator than glass.Thoughts?Actually, carbon fiber is a great heat conductor…   Read more»

Edward, I had once heard the 200F limit on motor temps. I assume that is the surface temp (duh) and it is taken several places around the circumference of business end?I ask because I’ve always worried about moonburners getting so…   Read more»

I second that.My apologies for jumping the gun a bit.

Thanks for the useful info, Ed.-Adrian

I wanted to know if liquid nails could be used in level one and two rocket construction. Liquid nails in very very stong and is great for bonding wood. It is flammable though. Or is epoxy still the best way…   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»