>
>Pros:
>Small unit with low current drain ( ~105 mA ) and has navigations screens.
>Stores lots of data. The way I run mine, log point every 12 second with 2
>seconds at sectors, gives about 75 hours of flight recording. You have no
>need to clear the memory as it will write over the earliest data, unlike
>some other types which stop if the memory is full.
Interesting point but there doesn't appear to be a clear consensus on this
as to whether the thing should stop or overwrite. I can make a case for
either way.
The Colibri only starts logging when it
>detects movement above a certain speed.
Another interesting point with both pros and cons. We've used both methods.
Switching on and starting logging is perhaps less confusing to those who
won't read manuals. It also lets you run ground tests easier.
>I have seen postings from Volkslogger users trying to protect the logger
>from small power interruptions. This suggests they may not tolerate small
>power drops.
Use separate master power/battery changeover 2 position switches not the 3
position center off type and these problems tend to go away.
The Volkslogger does have quite large internal capacitors but as its
operating system is "power up and start logging" a power interruption will
show a new flight. Shouldn't really be a problem to convince an O.O. that
it's the same flight as the times are logged.
>Mike Borgelt has poured scorn on the small connector that the Colibri uses
>( a plastic telephone type). However I have not had any problem with these
>after a couple of years of usage. These connectors also get used all the
>time for network connectors where I work and give very little trouble even
>in the dirtiest of places.
We've had about 10 years useage on these and seen a few failures after
about 4 to 5 years on B100s and Cambridge loggers. Seems the crimping of
the bare wire ends in the connector doesn't like vibration/temperature
cycling or maybe the plastic creeps and the crimp loses pressure.
I wouldn't use them in a new design. They are single point contact
connectors whereas most better electronics connectors have at least two
points of contact on each pin. This can be done in design by doubling up
the wires and using two pins for each line. Otherwise if you are happy to
carry the crimping tool in your field kit they should be fine.
While we are on loggers: I've been told there is a new Garmin Etrex with
3000 track point storage which includes altitude storage. Given that these
are under A$500 and IGC loggers are in the region A$1300 - A$1400 and up
can someone tell me why we are still requiring IGC loggers for the kiddie
badges?
Mike Borgelt
Borgelt Instruments - manufacturers of quality soaring instruments
ABN 75532924542
Box 7474 Toowoomba M.C.
Queensland 4352
Australia
Tel 0746 355 784
mob 0428 355 784
0429 355 784
fax 0746 358 796
International
phone: int'l+ 61 7 46 355 784
Cellphone:int'l +61 4 28 355 784
int'l +61 4 29 355 784
fax : int'l+ 61 7 46 358 796
email: [EMAIL PROTECTED]
website:www.ozemail.com.au/~mborgelt
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