Shock Cords

masking tape is more eco-friendly

(until they bio-degrade) rubber bands can be ingested by birds, which is usually fatal

- iz

Jerry Irv> >

Guess I should stop using rat-poison as ejection wadding, huh?

;)

Joel. phx

Bag-o-glass....

Stephen I use 9/16" tublar nylon on all my rockets 5.5" and smaller. On the 7.5" on up....I use 1" tublar. I build my rockets heavy and I've never had a problem with either. I only use small lengths of Kevlar (around 3/4" wide) for the parts of the cord that are outside the Nomex blanket, say maybe 3 ft or so in length. Finally, I make the apogee cord twice as long as the main cord (40 and

Lloyd Wood BRS Secretary LDRS LD/RSO Level lll

Nylon strap tubing. At least 4 times the length of the rocket...

you can see the "Fireball", a patent pending commercialized version at

Giant Leap Rocketry

- iz

Duane Phillips wrote:

Hmmm, if flying on farms, maybe the farmer would supply us with fertilizer, seed, or something to spread for him?

Bob Kaplow NAR # 18L TRA # "Impeach the TRA BoD" >>> To reply, remove the TRABoD!

I guess we'd have to see the patent claim, but this seems to be "prior art" to me...

Bob Kaplow NAR # 18L TRA # "Impeach the TRA BoD" >>> To reply, remove the TRABoD!

Birds are expendable. I have not seen bird carcases littering remote desert launch sites lately.

Jerry

Static URL's are superior.

Jerry

I would like to use another as a backup instead of just a backup match in one ARRD.

the ARRD works in reverse, so if two are used, and only one fires, you don't have deployment ? I can't see how two of them does anything good ?

Why not two in series. That way if one does not fire or separate hopefully the other one will. Bill Richardson

Drogue less dual deploy is my most common high power rocket recovery method. Works great and usually brings everything close to the pad.

Eric B.

here's a piece of irony

you can kill a mouse by painful poisons (arsenic), or crushing any part of their anatomy the spring-rap happens to catch and let them die a gruesome and possibly slow death, but you can't put one in a payload of a model rocket

- iz

Jerry Irv> >

the problem is that in dynamically generated websites that use frames, the frame URL does not reproduce the actual context

but here's your link to the frame

- iz

Jerry Irv> >

Um, I know. That's the point.

NFPA change request just to show regulation has gone wayyy overboard.

Exactly.

-- Eric Benner TRA # 8975 L2 NAR # 79398

Still lost here.

The ARRD holds a deploymen bad to the bulkhead by holding the hook.

two in series or paralle still do the same thing.

Unless they both fire, your deployment bag is still held to the bulkhead ?

Confused

/ArtU

I will gladly pay you tuesday for a motor on the flying field today.

I have a model rocket magazine article here showing how to attach a heart rate and breathing rate sensor to a mouse in a model rocket. Fox and Mims stuff, 70s.

/ArtU

Silly mouse rule.

Art,

When we say the ARRD's are in series, we mean that the chute or deployment bag is attached to one ARRD. Then that ARRD is attached to the other ARRD which is then attached to the bulkhead. If either ARRD fires and releases, the chain of attachment is broken and the chute or deployment bag is free to deploy.

-- Eric Benner TRA # 8975 L2 NAR # 79398

D'oh, Silly me !

thanks for the explainantion !

/ArtU