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From: email@example.com (Bill Allison)
Subject: Re: Help - Power mosfets - difficult load
Date: 28 Oct 2002 01:05:26 -0800
References: <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org>
NNTP-Posting-Date: 28 Oct 2002 09:05:26 GMT
> Phil wrote:
> > > ** You "ignored" my comments about the risks of using a direct
> > > link to the PWM generator - one glitch could spell curtains to those
> > > fets.
> > No - I pointed out that I would use a current generation fail-safe
> > receiver. "Glitches" in RC kit are a thing of the past.
> ** Is that what the advertising brochure says??
No - knowledge and personal experience. I have to entrust, week in
week out, F3A competition aircraft (= highly mobile 3hp circular saw)
with a replacement value of $3000+, my safety and the safety of others
to such equipment.
Although "glitch" free, people do of course experience complete
failures, but they are extremely rare, and usually external to the
electronics, e.g. wiring failures due to poor installation.
> The servo
> > output from the RX is *guaranteed* to be either that commanded by the
> > transmitter or that output by the programmable receiver fail-safe.
> ** Its your money and your fets.
> > bad signal I have the choice of "hold last command" or "switch to a
> > predetermined setting" (I would set throttle closed). For low battery
> > I can have throttle close to warn pilot but allow him/her to re-open
> > it to maintain control.
> ** Such simple faith in electronic perfection is touching.
> > >
> > > ** I am quietly confident of a nice graveyard pic.
> > but wishing me success nevertheless, right? :)
> > Anyway, the figures I'm seeing in the literature and the figures and
> > calcs in Winfield's posts tend to suggest that you will be
> > disappointed.
> ** They suggest imminent disaster to me.
> . . . . . . ............ Phil
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