uk.tech.rocketry Google Group

December update

2009-12-03T00:12:59Z

Greetings All,
The December update is now online.
Verna & Randy
[link]

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2009-11-22T17:16:29Z

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November update

2009-11-01T03:12:07Z

Greetings All,
The November updates for Photo of the Month and Fire & Smoke are now online.
[link]
Verna & Randy

Re: Easy questions regarding two-stage model

2009-10-21T08:34:09Z

Neil wrote:
If you email the webmaster you will get a reply but give them a chance
they wear many hats.

Re: Easy questions regarding two-stage model

2009-10-20T22:08:16Z

I did do some designs like that, but then I thought it was getting a bit
extravagant. Perhaps it is the easier thing to do after all.
Neil

Re: Easy questions regarding two-stage model

2009-10-20T22:05:20Z

Thanks. I found them now you said they were there.
Neil

Re: Easy questions regarding two-stage model

2009-10-20T19:41:16Z

I had been down to a couple (it was certainly the easiest way to get to a
big enough, open enough field to fly without having to cross everything that
it all wasn't going to end up stuck up a tree somewhere. I missed the last
couple for various reasons, only some of which were not having a model to

Re: Easy questions regarding two-stage model

2009-10-20T16:09:55Z

On Mon, 19 Oct 2009 23:20:42 +0100, "Neil"
<snip>
IF you drill a delay, holding the drill in the fingers is quite
satisfactory. Each 1/16" (roughly) is two seconds of delay time.
However, see below.
You are correct in that the delay grain composition is different from
that of the propellant. If you drill out 2.3 mm you will probably

Re: Easy questions regarding two-stage model

2009-10-20T15:53:41Z

I suggest you go along to a club flight if there is one near you. All
knowledge will then be yours.
Failing that there is a lot more traffic on the UKRA public forum for
which you can ask for a guest login without being a member.
Failing that, you can gap stage BP motors up to 8" or so, above which

Re: Easy questions regarding two-stage model

2009-10-20T15:04:05Z

On Oct 19, 3:20 pm, "Neil" <n...@chapellane69.free-online .co.uk>
wrote:
Drilling delays only works to shorten a longer delay down to NO LESS
than the shortest delay sold for that motor. REASON: If the delay is
shorter, there will not be enough material left to retain the
extremely high pressure while the propellant is still burning.

Easy questions regarding two-stage model

2009-10-19T22:20:42Z

Or at least I am sure they are questions that have been answered many times
and possibly in many ways before, it's just that I'm having a little trouble
finding the answers at the moment...
Since my first (and so far only) model bit the dust the other week, I have
decided to reincarnate the salvagable parts (fins, nose, motor mount) into

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2009-10-08T15:49:10Z

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October update

2009-10-01T02:30:21Z

Greetings to All,
The October Photo Of The Month and Fire & Smoke are now on line.
Verna & Randy
[link]

Re: Rockets & Things

2009-09-16T22:22:56Z

greetings, Rockets-things is still going and run by Malcom

Re: Rockets & Things

2009-09-15T21:15:36Z

Yes [link]
Very little. Try posting on the UKRA website. I know your not a memeber
but there is a sign up form on the forum section where you can access a
general discussion formum as a non member.
Damian