[BProckets] Great launch - Altmeter

[flint hapirat]

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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