Alt-BEAM Archive

Message #07060



To: beam@sgiblab.sgi.com
From: "Jaroslav 'Lord Slayer' Pelan" pelanj@feld.cvut.cz
Date: Mon, 25 Oct 1999 08:59:01 MET-1MEST
Subject: [alt-beam] Re: Rocket telemetry


hELLO,
if you wish just to measure the maximum altitude and do not need
the data in the rocket, take simply the thing used for measuring
angles you use in school (don't know the proper name). then put it
on a stick like that

___________x__________
\ / |
\ / |
------- |

looks like a pistol. x means attach a weight on a thread (in the
center of the (angle-o-meter?)).

now, get a friend and let him stand say 50 or 100m away from the
launching point.

after launch he must aim at the rocket and hold the thread in
position while the rocket reaches it's maximum height.

use this measured angle for computing the height which should be

height=(friends distance)*tangens( the angle)
R
|\
| \
| \
| \
| \
| \
| \ <-the inner angle
|____\F
^
| friend


hmm, hope this is clear enough and that it will be useful
greetings
JP



> Does anyone know how I can build an altimeter for a model rocket? Is there any other telemetry that could be launched (that doesn't cost a forutne to build)? Has anyone else done anything with rockets before?
>
> Chris
>
> ---------------------------------------------------
> Get free personalized email at http://www.iname.com



The EviL DaRKloRd SlaYEr



7061 Mon, 25 Oct 1999 07:58:18 +0100 Re: [alt-beam] Re: James Watt's sculpture, jewelry, and bots. beam@sgiblab.sgi.com Sean Rigter [mailto:rigter@cafe.net]
Hi James,

Have a peek at the ZX97lite which is a stripped down version.

http://www.xs4all.nl/~rodneyk/zx97_e.html

I worked with Rodney Knaap to adapt the ZX97 to fit on a single sided PCB.
Additional memory and I/O are connected via a flex cable on the expansion
bus.
I also have several designs, including a 6 chip version, of the EZ80
controller (no video, blank slate OS, 24 I/O, 32K nonvolatile memory) which
is
programmed via a PC printer port. When loaded with modified ZX81 rom code,
control programs written in ZX Basic will execute on power up.

regards

wilf

James G Watt wrote:

> In article <1118137B823BD1118C8E006097A7983E305B44@server2.powertech.bc.
> ca>, Wilf Rigter writes
> > It is
> >backward compatible with the ZX81, still B/W but now includes a 512K
> >nonvolatile RAMDISK, lot's of graphics modes and plenty of I/O.
Implemented
> >with CMOS Z80, memory chips
>
> Very cool :-) I want one.
> That robot hand thing on my web page is actually controlled via my ZX
> Spectrum.
>
> >and 18 other 74HC chips, the power supply
> >current is a cool 40mA at 6V which makes it possible to run off solar
power!
>
> Don't think that'd be an option here in 'Sunny Glasgow' (Scotland).
> --
> James G Watt
>
> http://www.kinetic-arts.demon.co.uk
> Part of the Video Arcade Game Collectors WebRing.
>
> You are in a little maze of twisty passages, all different.

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