Today's Message Index:
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1. 01:47 AM - Larger alternator 30 Amp (chris Sinfield)
2. 08:03 AM - Re: Larger alternator 30 Amp (Larzfromarz)
3. 10:09 AM - Re: Larger alternator 30 Amp (Craig Payne)
4. 10:34 AM - Re: Larger alternator 30 Amp (Rob Turk)
5. 12:06 PM - Re: 2200 timing (xair899)
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| Subject: | Larger alternator 30 Amp |
Hi
has anyone fitted a 30/40amp alternator on a Jab3300? Someone once showed me a
picture of one on the vacum pump drive but did not say if it was successful.
I am doing my elec loads and so far over 30 amps needed.
Chris.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=286361#286361
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| Subject: | Re: Larger alternator 30 Amp |
Chris -
I'd be curious as the list of equipment (and thus loads).
With a 20% margin (results in 24 amp load- continuous) it would seem difficult
to reach that limit with most modern electrical equip, especially with a fixed
gear aircraft with no air-conditioning.
Just curious as many folks ignore the process of summing the electrical loads and
I am happy to see that you are. Don't forget to classify loads as intermittent
and continuous.
Thanks,
Larry
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http://forums.matronics.com/viewtopic.php?p=286390#286390
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| Subject: | Larger alternator 30 Amp |
I recall asking about running an alternator off of the vacuum pump drive a
while ago. One comment was that the (direct) drive didn't turn fast enough
to produce adequate current. In a conventional setup with a pulley the
smaller pulley on the alternator makes it turn faster than the crank. Check
the specs of the alternator before you dive in.
If you have purchased your electrical gear yet it may be simpler, more
reliable and cheaper for find electronics and lighting that draws less. Some
of the LED lighting, radios and EFIS draw less than their predecessors.
-- Craig
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of chris
Sinfield
Sent: Sunday, February 14, 2010 1:47 AM
Subject: JabiruEngine-List: Larger alternator 30 Amp
--> <chris_sinfield@yahoo.com.au>
Hi
has anyone fitted a 30/40amp alternator on a Jab3300? Someone once showed
me a picture of one on the vacum pump drive but did not say if it was
successful. I am doing my elec loads and so far over 30 amps needed.
Chris.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=286361#286361
Message 4
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| Subject: | Re: Larger alternator 30 Amp |
Over at the Yahoo group there are some pictures of someone who fabricated a
pulley on the vacuum pump drive and attached a 45 Amp alternator. If you
have an account, see these pictures:
http://groups.yahoo.com/group/jabiruengines/photos/album/1487153759/pic/list
Rob
----- Original Message -----
From: "chris Sinfield" <chris_sinfield@yahoo.com.au>
Sent: Sunday, February 14, 2010 10:47 AM
Subject: JabiruEngine-List: Larger alternator 30 Amp
> <chris_sinfield@yahoo.com.au>
>
> Hi
> has anyone fitted a 30/40amp alternator on a Jab3300? Someone once showed
> me a picture of one on the vacum pump drive but did not say if it was
> successful. I am doing my elec loads and so far over 30 amps needed.
> Chris.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=286361#286361
>
>
>
Message 5
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A simple check for ignition timing which isn't precise but will show gross errors.
Can't claim credit for it, thank Roger Lewis.
Remove a spark plug from no 1 cylinder and place a finger over the hole, rotate
the prop slowly in the correct sense. When you feel compression you are near
TDC for the firing stroke. Gently put a thin screwdriver in the spark plug hole
to feel when the piston reaches TDC. It will take a few goes as there is a
dead space at the peak. If you have a dial gauge you can use the method in the
manual.
On the flywheel the two magnet centers will be at the 9:30 and 3:30 clock positions.
Mark a tooth against some reference point, then rotate the prop slowly backwards
and count the number of flywheel teeth required to center of the magnets
exactly on the coils.
The flywheel has 101 teeth (99 on older engines), so 1 tooth is roughly 3.6 degrees.
25 degrees / 3.6 = just under 7 teeth.
Nick
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=286419#286419
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