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Old Jul 18, 2003, 03:01 AM
rbutt_no2spam_@btinternet.com
Guest
n/a Posts
Futaba FF8 64k Campac empty

Anyone come across this before?

A guy was flying his 2 week old Caliber when it suddenly nosedived at
height from straight and level flight into the ground.

On investigation the FF8 seems to have reset itself to the internal
model memory 1 (programmed for a Moskito), further delving showed
every CamPac (original Futaba) memory slot to be at a default setting
with each named model slot replaced with mdl-9 mdl-10 etc.as though
the entire contents of the CamPac have been wiped and/or reset.



He has now re-entered some of the data back into the CamPac memory
slots and it (CamPak) appears to be working and holding the settings
(for now)


Problem now is this just a Campac problem or a Transmitter problem?


btw the Caliber almost self destructed on impact and it seems more
cost effective to buy another kit rather than individual spares.


rgds

Bob
Old Jul 18, 2003, 03:01 AM
Martin Round
Guest
n/a Posts
Re: Futaba FF8 64k Campac empty

I've seen reports of mobile phones near transmitters causing this to happen.
But I've never believed them.


Old Jul 19, 2003, 03:01 AM
david
Guest
n/a Posts
Re: Futaba FF8 64k Campac empty

I was going to say mobile fones.

BTW, I fly airbuses and we recentl;y had a case where a fone sent a batch of
texts and DESTRYED the comms computer. Gul[p!

D
"Martin Round" <nospam@blueyonder.co.uk> wrote in message
news:YSFRa.22721$4c.16708@news-binary.blueyonder.co.uk...
> I've seen reports of mobile phones near transmitters causing this to

happen.
> But I've never believed them.
>
>



Old Jul 26, 2003, 03:02 AM
Angelos Gonias
Guest
n/a Posts
Re: Futaba FF8 64k Campac empty

The most common reason for a radio to reset itself during flight is
old, well used, worn switches that will do a "make before break".
Because of the way the switches are wired in the Futaba TXs this will
instantaneously create a short circuit between the internal 5V and
ground power supply rails. Perhaps you should ask your friend if the
incident happened while he was toggling a switch.

Normally the TX will not read of write to the CAMPac unless changes
are made to the model program. However it is possible that the short
circuit corrupted the communication between the radio and the CAMPac.
The first four bytes in the memory (header) indicate if the CAMPac is
initialised and with what TX. If any of them is changed by a false
write then the TX will want to initialise the CAMPac again. However I
am sure that the TX asked for confirmation before resetting the model
programs in the CAMPac to MDL-9..etc and this takes quite some time to
complete as the write cycles to the CAMPac are fairly slow. So I am
sure your friend saw that the TX was re-initialising the CAMPac.

I would say that the whole event was a bad coincidence. If the CAMPac
header data were not corrupted the radio would have been functional
again within a couple of seconds.

Please don't blame mobile phones for everything bad that happens at
the field and you can't explain. Where do you think your phonebook
entries are stored in your mobile phone? Yes, both your phone, SIM
card and the new VISA smart cards have EEPROM memory identical to the
one used for CAMPac. So is your VISA card going to be useless if you
carry it with you together with a mobile phone?

Regards,
Angelos
www.model-gadgets.com


rbutt_no2spam_@btinternet.com wrote in message news:<8q0ehvsmlsgvtcvd55ai7ct8763oiesil9@4ax.com>. ..
> Anyone come across this before?
>
> A guy was flying his 2 week old Caliber when it suddenly nosedived at
> height from straight and level flight into the ground.
>
> On investigation the FF8 seems to have reset itself to the internal
> model memory 1 (programmed for a Moskito), further delving showed
> every CamPac (original Futaba) memory slot to be at a default setting
> with each named model slot replaced with mdl-9 mdl-10 etc.as though
> the entire contents of the CamPac have been wiped and/or reset.
>
>
>
> He has now re-entered some of the data back into the CamPac memory
> slots and it (CamPak) appears to be working and holding the settings
> (for now)
>
>
> Problem now is this just a Campac problem or a Transmitter problem?
>
>
> btw the Caliber almost self destructed on impact and it seems more
> cost effective to buy another kit rather than individual spares.
>
>
> rgds
>
> Bob

 


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