[BProckets] Great launch - Altmeter

[mrgizmo]

Actually I'm looking to build an electroniv one, I have pics but no basic
stamp.
----- Original Message ----- 
From: "flint hapirat" <flinthapirat at yahoo.com>
To: "Black Powder rockets discussion list" <bprockets at amateurrocketry.com>
Sent: Sunday, September 26, 2004 3:44 AM
Subject: [BProckets] Great launch - Altmeter


> Hi,
> It depends on how expensive/accurate you want to get.
> You can buy altimeters for rockets (see
> rocketryonline.com and look on the bar for "vendors"
> or click on the search bar for altimeters). Google
> will also help... You could also buy a simple one from
> Estes (I've built it - almost at zero cost). A home
> built version of Estes's altimeter uses a 180degree
> angle bow used to measure angles at high school (1$
> cost). I attached it (epoxy) to a tube and drilled a
> hole at the angle meters center. Through the hole I
> attached a metal wire and a weight. The wire weight
> will always stay vertical. I look at the rocket (from
> a known 100m distance from the launch site - a friend
> is a must for that) and see where apogee happens, I
> fix the angle of the wire with my finger, turns the
> device to the side and write down the angle. A quick
> calculation will tell me the approx. apogee. This will
> not take into consideration shifts of the rocket
> toward me or away from me - but I don't care that
> much.. if it's 90m or 94.6m it's the same...
> Cheers,
> Flint
>
> --- mrgizmo <mrgizmo at vianet.ca> wrote:
>
> > That was just a guess, I wont know for sure until I
> > build an altimeter
> > (sites?). And I still havent brought the motors up
> > to the point where they
> > cato yet, I think I still have a few test batches to
> > go.
>
>
>
>
>
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