a_bab

I'd buy some 1" and 1/2" tubes, but since the shipping is a killer I want to ask if any of you have some negative experience concerning these tubes. I want to use them for nozzle less only rockets, including BP and whistle. They seem to be made or chipboard rather then virgin kraft, so I'm not expecting any wonders here.

While I'm perfectly aware that there are some tests to do in order to reach tune up these tubes to the max, I'd like to know what shoudl I expect from them before buying them.

I know Steve is a member here; I hope this topic is not going to offend anyone because after all we all have the interest to have everything going smooth.


So: any experience with these convolute wound tubes?

I can aquire some spiral wound supposedly high quality tubes made by a known european supplier. These tubes are 1" internal diam. and the wall thickness could be as much as 1/4" or even more.

My question is if there's anyone with some experience regarding what kind of rockets I can make out of these? Since they are for 3 pounds, the motors will be quite powerfull and I'm afraid even a simple BP (cored of endburner) will fail given the weak nature of the spiral wound tubes.


Any opinions please?

BC = barium chlorate (as in Best green Color)

As the good greens are elusive to me and the ones saying that "BC green is arguable the best" obviously never saw a green obtained by BC/shellac, I'm considering more and more to use it.

But, BC it is known as giving among the most sensitive compositions, some being known to be able to take fire spontaneously. This is plain scarry. Imagine what happends if this takes place in an already finished shell? So the question of safety remains, vs the benefices of a really good green.

There are two things I'd like to get answers for:

1. Is it feasable to obtain BC from the electrolysis of BaCl2 using Ti/MMO electrodes. Did somebody do it?
2. Is it really that sensitive, and if so what are the factors making it so (obviously no sulphur/sulphides etc, but there may be others)


I mention I have access to Ba nitrate/KP/AP/MgAl etc. but the green sucks compared to BC (barium chlorate).