Hi Ashley
 My friend whom I described in an earlier post had his electronics mounted
on top of a 4 cell AA battery pack. His rocket was fiberglass and he had it
mounted in the middle of the rocket. it was rubber banded in. I'd give you
his email address but he doesn't like to talk about his rocket escapades ha
long story . It seem to work real well with a little hand held computer that
he'd written software for. I can't remember what the device was called but I
believe he told it was made in the uk. He would plug in to the hand held and
it would show the projectory and max altitude and thurst  of the rocket
engine. I was going to developed something similar for my radio control
aircraft but never got around to doing it. Mike Johnston
----- Original Message -----
From: "Ashley Roll" <ash@DIGITALNEMESIS.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Sunday, June 02, 2002 6:48 AM
Subject: Re: [EE] [OT]


> Hi Wouter,
>
> Good point, I had assumed that the board size would be quite small because
> it would be the diameter of the projectile..
>
> Are there any texts available on the design of electronics for high-G
> environments? I'd be interested for my rocket timer project.. The board
I'd
> developing for that purpose will be mounted along the axis of acceleration
> so flex isn't the problem, just the weight of the components.
>
> I'm looking at a SOIC-28 '876 and a SMT resonator at present.. Also some
> D2PAK (TO-252?) MOSFETs and mainly 0805 size resistors and caps.. Any
hints?
>
> Cheers,
> Ash.
>
> ---
> Ashley Roll
> Digital Nemesis Pty Ltd
> www.digitalnemesis.com
> Mobile: +61 (0)417 705 718
>
>
>
>
> > -----Original Message-----
> > From: pic microcontroller discussion list
> > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of wouter van ooijen
> > & floortje
> > hanneman
> > Sent: Sunday, 2 June 2002 8:52 AM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: Re: [EE] [OT]
> >
> >
> > > If you were to arrange the PCB so the axis of acceleration
> > goes through
> > the
> > > surface and "pushes" the components onto the board, I'd
> > assume that you
> > > wouldn't have any problems..
> >
> > I would not do that unless the PCB is very small: it might
> > bent and hence
> > (when the component is more stiff) the solder will crack.
>
> --
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