Today's Message Index:
----------------------
1. 01:12 AM - Re: YAK 18T Battery (Michael Wikstrom)
2. 05:39 AM - Re: YAK 18T Battery (Rob Rowe)
3. 10:11 AM - Re: Re: New Digital Tach from Flight Data Systems (doug sapp)
4. 01:21 PM - Oil cooler door winterization kit (skidmk)
5. 01:37 PM - Re: Oil cooler door winterization kit (doug sapp)
6. 02:26 PM - Re: Oil cooler door winterization kit (skidmk)
7. 07:40 PM - Emergency System Air Leak (Craig Winkelmann)
8. 07:58 PM - Re: Emergency System Air Leak (skidmk)
Message 1
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| Subject: | Re: YAK 18T Battery |
Rob, Didier,
The Mascot 9740 is a 5A charger in it's 24V version. It's also a three
stage charger which quite quickly drops the 5A
max charge down to the levels needed to charge the battery correctly.
I've had my NP-17-12 batteries since 2004 and never had any
problems...except forgetting cockpit light on etc, like Didier..
Cheers
Michael
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Rob Rowe
Sent: 14 October 2009 23:16
Subject: [?? Probable Spam] Yak-List: Re: YAK 18T Battery
Didier,
The Yuasa NP 17-12 are excellent batteries but be aware that the
manufacturer recommends that they are charged at a MAX current of 25% of
their AH capacity for approx 4-5 hours to avoid damaging the cells.
Therefore at 17AH that's about 4A max ... the Mascot 9740 is a 10A charger,
so may be better to go for a lower current version (4A = model 2140?)
You may want to consider the NPC 17-12 batteries as well, these are slightly
more expensive but may offer a greater lifespan ... they have lasted 8+
years so far in my -52.
FWIW - also try shedding as much load as possible when taxiing as if the
generator is off-line then the batteries will be taking all the electrical
load.
When the generator cuts in again the (partially discharged) batteries can
get charged at very high rates (10+ amps on a -52) ... note your ammeter
reading (x 10) next time and you'll see what I mean.
Battery condition is a factor here, as is ambient temperature, but it's
surprising what a just few minutes taxiing can take out of them.
So I only turn the inverters / strobes / heaters on (the big current users)
just before starting the power checks prior to departure and turn them off
again on exiting the runway after landing - as I operate from a grass strip
this also saves wear & tear on the gyros being bounced around on the ground.
Cheers, Rob R
G-YAKX
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=267965#267965
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| Subject: | Re: YAK 18T Battery |
Michel,
Your choice to charge in series at 24V but I prefer to charge each battery individually
at 12V to confirm they are in a similar condition ... more hassle but
more peace of mind.
The Mascot auto charger uses a constant current output, until the battery's internal
resistance rises to a trigger point, before changing to a series of constant
voltage modes of operation.
So the 24V Mascot 9740 at 5A is still initially charging at c.20% more than the
Yuasa manufacturer's maximum recommended level ... again your choice.
If it "quickly" drops from 5A then this just highlights the high charge rate being
used ... it's not an indicator that the battery charge rate is appropriate.
Anyway it's your money, your batteries, your choice.
Cheers, Rob R
G-YAKX
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=268038#268038
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| Subject: | Re: New Digital Tach from Flight Data Systems |
Guys,Update to those of you waiting for, or are interested in the new FD
digital tachs or g meters-----The new digital tachs are actually not quite
ready to ship yet per Chuck at FD, the tech guys are doing a software
modification to allow the digital tach to be used with the 9 cly radial
engine. He guessed that he could ship in 2-3 weeks. There were also
questions as to rather these tachs could be installed in both cockpits,
Chuck indicated that he could see no reason why this could not be done.
I have the first shipping position on the first 6 tachs off the line.
Yesterday I ordered the last 4 of the G meters they had in stock, thought
that best to grab this stock as another production run is not scheduled for
6 weeks. Those 4 units should arrive here in about a week.
Doug
On Sat, Oct 10, 2009 at 4:05 PM, keithmckinley
<keith.mckinley@townisp.com>wrote:
> keith.mckinley@townisp.com>
>
> Thanks for that post Craig.
>
> I really like their G-meter (thanks again!) the display is large and really
> easy to read. The tach looks like a great deal.
>
> --------
> Keith McKinley
> 700HS
> KFIT
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=267394#267394
>
>
--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax 509-826-3644
Message 4
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| Subject: | Oil cooler door winterization kit |
Hi all,,
anyone know where I can get one of these. Tried Doug, no response.... could be
the loose nut behind the keyboard. Doug.. you out there? you have any of these?
thanks
Mike
--------
Mike "Skidmk" Bourget
Ottawa, Ontario
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=268116#268116
Message 5
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| Subject: | Re: Oil cooler door winterization kit |
I answered, here is is in a nutshell-- Am out right now but will do another
run of the FOD screen and winterizartion kits very soon.doug
On Thu, Oct 15, 2009 at 1:20 PM, skidmk <skidmk@gmail.com> wrote:
>
> Hi all,,
>
> anyone know where I can get one of these. Tried Doug, no response....
> could be the loose nut behind the keyboard. Doug.. you out there? you have
> any of these?
>
> thanks
>
> Mike
>
> --------
> Mike "Skidmk" Bourget
> Ottawa, Ontario
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=268116#268116
>
>
--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax 509-826-3644
Message 6
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| Subject: | Re: Oil cooler door winterization kit |
Hey Doug,,, didn't get the reply. Please let me know as soon as you have them.
thanks
Mike
--------
Mike "Skidmk" Bourget
Ottawa, Ontario
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=268129#268129
Message 7
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| Subject: | Emergency System Air Leak |
Dennis:
You posted this:
"If your emergency system is leaking, the first place to look is at the rubber
O-ring under the 22 mm nut on the air bottle. A very common problem particularly
if the tank was recently removed from the airplane and the fittings removed
from the tank for inspection or servicing. The next place to look is the emergency
air valve. Remove the output line from the emergency air valve with the
valve completely closed. Spray soapy water on the output fitting on the valve.
If it bubbles, the valve is leaking internally."
Where does one get the o-ring for the fitting on the emergency air bottle? My
system leaks all emergency air pressure out in two days. Will do the other tests,
but the bottle was removed and reinstalled once or twice in the recent past.
ALso verify this info would be for a CJ not a Yak.
Craig
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=268165#268165
Message 8
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| Subject: | Re: Emergency System Air Leak |
Craig,,,
this happened to me last fall.... was the check valve on the firewall, on the right
hand side of the plane (when seated in the pilots seat) about half way up.
Refurbished the check valve with new seals and spring, and no more problems.
Might want to check the easy stuff first.
Mike
--------
Mike "Skidmk" Bourget
Ottawa, Ontario
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=268169#268169
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