I second that John,
Seen B40's with "super heavy duty" not the
"alkaline" as specified. No doubt in B400's with the AA batteries too.
What's an outlanding cost?
Mike
At 05:00 PM 14/01/2009, you wrote:
Eveready super heavy duty batteries are simple
Zinc Carbon cells developed from the leclanche
cells of the 19th century, they are basically
low capacity and of dubious value. They are also
prone to electrolyte leakage when discharged
with resulting damage to the battery holders and
surrounding electronics. I would strongly
recommend that they are not used in anything
other than simple cheap disposable flashlights.
Alkaline batteries have significantly better
performance (up to 6 times depending on load
characteristics), however by far the best
performing batteries in capacity and discharge
characteristics are the Lithium batteries recommended by Spot.
Yes they are expensive but if you do the math
as our American friends like to say, it is worth
spending the extra money to achieve the performance.
John Parncutt
----------
From: [email protected]
[mailto:[email protected]] On Behalf Of John Switala
Sent: Wednesday, 14 January 2009 5:38 PM
To: 'Discussion of issues relating to Soaring in Australia.'
Subject: Re: [Aus-soaring] Australian Multi
Class Nationals - Glidertracking - Day 2
Peter
Initially I was told that the Lithium batteries
were not required for the reasons Scott Penrose
raised. So I purchased some average quality
batteries, Eveready Super Heavy Duty. We got
low battery lights on the first day of use! I
dont know the science of the different
batteries but were installing some lithiums in
the units for tomorrow onward. Well see what happens!
If the batteries do run out there is absolutely
no requirement for the pilot to change batteries
in flight. We just wont be able to track that
aircraft like the good ole days!
The biggest problem, outside of battery failure,
seems to be the spot start process. Its only
two buttons but seems difficult to get right for
some. Its understandable though, when your
main focus is flying a competition task.
Regards
John
From: [email protected]
[mailto:[email protected]]
On Behalf Of Peter Stephenson
Sent: Wednesday, 14 January 2009 4:19 PM
To: Discussion of issues relating to Soaring in Australia.
Cc: DDSC chat
Subject: Re: [Aus-soaring] Australian Multi
Class Nationals - Glider tracking - Day 2
John,
have you any idea how long the batteries last on
continuous tracking? Spot specify not cheap
Lithium batteries ($8.95 a pair of AA Lithium
Energisers at my chemist next door) only and we
have been discussing how long they last.
Changing them in mid-air is a bit fiddly and
probably dangerously impairing good look-out.
PeterS
PeterS
John Switala wrote:
Guys
Spot tracking devices have been installed in all
gliders in the 18 metre and Open classes for Day
2 of the Australian Multi Class Nationals being held at Benalla, Victoria.
Yesterday we had a few pilots who forgot to turn
on the spots and a couple of failures due to low
batteries, so not all gliders were shown. The
ones that were on the track maps gave us a good
look at what was happening out there!
There are 8 gliders in Open class and 12 gliders in 18 metre.
The link for Open class is:
<http://track.glidingmaps.com/event/multiclass09-open/current/display>http://track.glidingmaps.com/event/multiclass09-open/current/display
The link for 18 metre class is:
<http://track.glidingmaps.com/event/multiclass09-18m/current/display>http://track.glidingmaps.com/event/multiclass09-18m/current/display
Launch time is 2:15pm. Class launch sequence
is: Standard, 18M, 15M, then Open.
The original task set for the day was a 720km
fixed task, but the temperature didnt break the
inversion so a delay was called. The B task was
selected but the day again did not prove to be
cooperative. Then the wind changed affecting
the runway selection. The gliders have been
re-gridded and a C task determined. The task is
an AAT (Assigned Area Task) of 3 hours duration for all classes in the comp
The task is:
Benalla
Boree Creek - 30 kilometre radius area
Deniliquin - 70 kilometre radius area
Glenrowan - 15 kilometre radius area
Benalla
Minimum distance is 319 kilometres; Maximum distance is 709 kilometres.
Weather forecast is a blue day, temperature 41C
in Benalla. Thermal strengths should be an
average of 8-10 knots over the task. Heights
forecast are 10,000-12,000 feet. Wind is
currently Northerly to change in the late afternoon to more westerly.
Browsers to use are Firefox or Safari. Internet
Explorer does not function well.
Thanks to New South Wales Gliding through the
Narromine Club for the loan of their 10 spot devices.
Thanks also to John Wharington and Scott Penrose
for the development effort for glider tracking.
John Switala
Ops Director
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