I've been working on a few articles for Sport Rocketry (forever, now...
I wonder if I'll ever have them done) for recreating and sometimes
fixing old designs. The Mach 10 is one of them.
Basically, I glue the elevator and the elevator reinforcements together
but not to the vertical stabilizer. Instead, I hinge the elevator
assembly to the vertical stabilizer and use hooks and elastic bands to
pull the elevator assembly down to the 'normal' position where Centuri
would have had you glue it.
Then you take some polystyrene tubing about the same width as the
vertical stabilizer and glue it to the leading edge. On one end, the
tubing ends flush with the inner edge of engine mount tube (it goes
through the main body tube and the engine mount tube.) The other end of
the tubing ends about 3/4 up the leading edge of the vertical
You run music wire down through the tube. It attaches to the vertical
stabilizer assembly with a waferglass control horn. The other end
extends into the engine mount tube. You then build a 'piston' that
slides freely in the engine mount tube. It's anchored with some Kevlar
to the clay filled nose cone.
For flight, the piston is positioned so that the music wire 'pushrod'
rests on the piston. This keeps the elevator at 'neutral.' When the
ejection charge fires, the piston and nose cone are tossed overboard,
and the elastic bands pull the elevator to the 'full up' position. It
can now move to this position because the piston is no longer holding
It sounds more complicated than it is. I've built 3 like this now and
they all work fine. I keep flying them until they fly away.
] On Behalf Of Jonathan Sivier
Sent: Wednesday, May 09, 2007 10:40 AM
Subject: Re: [OldRockets] Mach 10
Switenky, Shawn wrote:
> I use a plastic cone PNC 20 from something like Estes Sizzler
> equivalent in my clones. Fill it full of clay. It gets tossed
> ejection, so it won't hurt the glide.
> In my clones, I use a moveable elevator and that makes the
> arrow straight. I've figured out a way to mostly hide all the
> required to make the elevator move so it looks very much like
> Mach 10.
I'd be interested in hearing how you did that. Do you still use
nose that gets ejected?
Secretary, Central Illinois Aerospace
jsivier AT uiuc.edu
CIA Web Site: http://www.prairienet.org/cia/
Home Page: https://netfiles.uiuc.edu/jsivier/www/
"Remember to always keep the pointy end up."
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