home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!spool.mu.edu!agate!ucbvax!mtxinu!taniwha!paul
- From: paul@taniwha.UUCP (Paul Campbell)
- Newsgroups: rec.models.rockets
- Subject: Re: 8' rockets..
- Message-ID: <1368@taniwha.UUCP>
- Date: 28 Dec 92 22:54:34 GMT
- References: <23DEC92.14348203.0041@music.mus.polymtl.ca> <1992Dec24.174616.23127@hpcvaac.cv.hp.com> <24DEC92.15338923.0031@music.mus.polymtl.ca>
- Organization: Taniwha Systems Design
- Lines: 58
-
- In article <24DEC92.15338923.0031@music.mus.polymtl.ca> CT80@music.mus.polymtl.ca (Steph) writes:
- >>: One thing though : we are not experimenting with propellers. Last
- >>: time we use a professional French rocket propeller. We are headed
- >>: to use the same line of engine (although we might take a stronger
- >>: one, :)). It amazes me that there doesn't seem to be any made in
- >>: North America.
-
- ISP (Los Vegas, NV) makes motors for sounding rockets - the stuff that
- we use in 'high power rocketry' is smaller versions of the same stuff
- that they sell, (why do we use the smaller stuff? - only because we
- can't afford the big stuff :-). The propellents are versions of the
- same stuff the Space Shuttle solid boosters use (AP/rubber)
-
- >Yup, we used a manufactured motor the last time around, and we
- >are most likely doing the same thing now. I don't have the specs
- >of the different type of engines with me, all I recall of it is that
- >it was solid-fuel ("propergol" in French; don't know if it's a
- >direct translation of not), and came out to around $1000 apiece.
- >It was donated to us by the French Space Agency. How could we
- >refuse?
-
- Probably not :-) For $1000 roughly we can buy 2-3 'M' reloads from ISP
- (plus you need the casings - but then you get to use these again).
- This will get you up to somewhere in the range of 20-50,000ft which
- is quite legal in many places in the US with appropriate FAA clearance.
-
- >We didn't experiment with the staging concept. First we want to
- >build a reliable parachute ejection system as well as a dependant,
- >expandable inboard computer system. Once that is done, we will
- >most likely include funkier scientific experiments, staging and
- >picture-taking.
-
- Triploi people do lots of this syuff, you can buy on-board computers,
- ejection timers/pyrotechnics or camera systems through people who advertize
- in High Power Rocketry - which is not to say that you shouldn't develop them
- yourself since this is half the fun of this hobby (the other half is 'whoosh!').
-
- For example I fly an <1oz flight computer about as powerfull as an Apple II
- in rockets in the 'H' to 'J' size (and soon in my staged 'K' to 'K').
-
- Tripoli people do fly smaller model rockets - it depends on the person,
- there's a lot of overlap in technologies and in my case at least I live in a
- built up area and have to travel a long way to find somewhere to fly high
- power.
-
- However I think we are kind of dancing around the issue here ... so here's a
- couple of questions:
-
- - How heavy is your flight package?
- - How high do you want it to go?
-
-
- Paul
- --
- Paul Campbell UUCP: ..!mtxinu!taniwha!paul AppleLink: CAMPBELL.P
- "Finally after much thought he tied a dollar bill to the top of the tree, it
- seemed to fit - after all it was the premier capitalist holiday, besides after
- the 'fall' of communism a star didn't seem appropriate anymore ..."
-