I presume Tord's phone operates under GSM system. That maximum peak power
in principle is 3X of what is in most cell phone in the US. The legal RC
channel frequency is about half of what is in the US. Those are the two
differences. The best way is to ground range or bench test with the cell
phone turned on from time to time. The next time a cell phone in operation
can be some one else, inadvertently. Dealing with the problem is better
than running away from it.
YK Chan
in Seattle.
- Original Message -
From: Tord [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Cc: RCSE [EMAIL PROTECTED]
Sent: Wednesday, May 03, 2000 12:25 PM
Subject: [RCSE] Experience with cellular phones ...
Dear Ken,
Just a short note on the dangers of mixing mobile phones and
electric flight. I had a powered Studio 'B' Avro Vulcan in my
lap, powered by a Kyosho car motor, and a 8:1 Graupner gear box
and a seven cell RC2000 pack. It was not running or anything,
but it was armed when I decided to make a call on phone, and
as soon as I had dialed the number the engine started to run
at full speed! With the tx on one side of me (it was on) and
the plane in my lap I never would have thought it could run
like that. Happily, for this event at least, the prop collet
was loose on the shaft, so I was not damaged, just scared and
puzzled.
The ESC was one of those ultra-safe Gordon Tarling speed
controls, that you have to arm by throttling fully up and then
down
before they start the motor. It had been armed, but I would never
have guessed that it would run when the cellular tried to contact
the nearest repeater.
Further testing showed the transmitter to be totally unaffected
(it was a Graupner mc-15 - a close relative to the JR computer
radios)
but getting the cellular's antenna close to any metal part of the
rx, the wiring or the pushrods set the motor off again! This with
the rubber duckie antenna on the tx in place and just two feet
away!
So while the tx passed with flying colours the kit-built rx did
not!
I guess any rx would have similar problems - glad that the tx
seems
OK with phones ;-)!
So do turn off your cellular before playing with your models. Had
this
been a big model with one of my Aveoxes, god knows if I've been
around
now!
We had 28+ C last week, pretty fair for March in Sweden!
Safe flying!
Tord,
Sweden
--
If reply difficulties - use [EMAIL PROTECTED]
Tord S. Eriksson, Ovralidsg.25:5, S-422 47 Hisings Backa, Sweden
RCSE-List facilities provided by Model Airplane News. Send "subscribe"
and "unsubscribe" requests to [EMAIL PROTECTED]
RCSE-List facilities provided by Model Airplane News. Send "subscribe" and
"unsubscribe" requests to [EMAIL PROTECTED]
