Today's Message Index:
----------------------
1. 02:38 AM - More Nanchang VR Stuff (Graeme Frew)
2. 05:45 AM - Alternator/VR Replacement for the CJ (Craig Winkelmann)
3. 11:12 AM - Re: Alternator/VR Replacement for the CJ (doug sapp)
4. 05:47 PM - Need mechanic TX (TXYak)
5. 05:53 PM - Re: More Nanchang VR Stuff (Yak Pilot)
6. 06:03 PM - Re: More Nanchang VR Stuff (Yak Pilot)
7. 06:26 PM - Re: Need mechanic TX (mikspin)
8. 08:32 PM - Re: Alternator/VR Replacement for the CJ (keithmckinley)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | More Nanchang VR Stuff |
Hi All,
This Nanchang voltage regulator stuff is very topical for me right now. I
have a syndicate member stuck in the middle of the South Island of NZ with
our CJ that keeps blowing the main power 50 amp fuse. He has had an avionics
guy scratching his head over the system for two expensive days now and they
are no closer to a solution. I've had no end of problems with my VR so my
engineer cobbled together a VR using a Harvard part as a start point. It has
worked flawlessly for two years but now it seems we have a major problem.
I've sent the avionics guy all the electrical diagrams I have from the CJ
manuals and he doesn't seem to be any closer to pin pointing the problem. I
was advised through this list a couple of years ago to chuck the VR over my
left shoulder and fit an alternator. At the time it seemed like an expensive
solution but right now it is a path I wish I had gone down. In my humble
opinion an alternator seems like a good long term solution if you are having
electrical trials with your CJ. Hind sight is a wonderful thing.
Happy New Year from those of us first to see it in.
Regards to all on the list.
Graeme
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Alternator/VR Replacement for the CJ |
I installed the B&C alternator and VR on my CJ. George Coy had the mounting plates.
Barry Hancock has had a machine shop replicate them so they are available
from two sources.
www.bandcspecialty.com - The alternator on their site is a 35 amp model. They can make a higher amp version if needed. This alternator uses their LS-1A 28 volt voltage regulator. The alternator lists for $780 and the VR is $268. Add the mounting plate shipping/handling and installation time/wiring.
Installation on the Housai requires a shaft seal to prevent oil from getting into
the alternator.
Anyone thinking about installing an EFIS or other expensive avionics should consider
this as an option. A generator overvoltage condition could be a costly
situation otherwise.
Craig
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=221771#221771
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Alternator/VR Replacement for the CJ |
Craig,
Make that 3 sources as I have the the alterntor mounting plate with seal in
stock also.
Always Yakin,
Doug
On Tue, Dec 30, 2008 at 5:44 AM, Craig Winkelmann <capav8r@gmail.com> wrote:
>
> I installed the B&C alternator and VR on my CJ. George Coy had the
> mounting plates. Barry Hancock has had a machine shop replicate them so
> they are available from two sources.
>
> www.bandcspecialty.com - The alternator on their site is a 35 amp model.
> They can make a higher amp version if needed. This alternator uses their
> LS-1A 28 volt voltage regulator. The alternator lists for $780 and the VR
> is $268. Add the mounting plate shipping/handling and installation
> time/wiring.
>
> Installation on the Housai requires a shaft seal to prevent oil from
> getting into the alternator.
>
> Anyone thinking about installing an EFIS or other expensive avionics should
> consider this as an option. A generator overvoltage condition could be a
> costly situation otherwise.
>
> Craig
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=221771#221771
>
>
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Need mechanic TX |
I'm looking for help completing a Yak 52 project. Need electrical help with a
few items(2 Gear down lights not working, Front starter button doesn't work, Shower
of sparks inop) I'm located in North Dallas at Aero-Country.
Chris Keating
CKeating@peoplepc.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=221853#221853
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: More Nanchang VR Stuff |
Graeme, here is a trick that should be helpful in troubleshooting your 50 a
mp fuse problem.- Pull-the fuse, now take a 28 volt light bulb.... pref
erably somewhere around 50 watts or so.- If you can not find one like tha
t, substitute two 12 volt bulbs in series.- Bottom line is that with say
50 watts worth of light bulb, your current draw will be roughly 2 amps.-
Take the light bulb and connect it with wires in PLACE of the fuse.- This
will LIMIT THE CURRENT DRAW TO 2 AMPS MAXIMUM!-- This way the power ca
n be turned on and LEFT on, without blowing anything.- When the short cir
cuit occurs that has been blowing the fuse, the light bulb will come on ...
full brightness.- You can then turn off, disconnect, isolate other circu
its one at a time until the light bulb goes out.- Using this method you c
an shake, rattle and roll all the wiring just having someone eyeball that l
ightbulb as you do it.- =0A=0AThis method works on ANY kind of problem wi
th a short circuit where a fuse or circuit breaker is blowing as soon as yo
u apply power.- Most technicians look at a light bulb as a simple way of
checking for voltage, as in a "idiot light".- Rarely do they also realize
it can be used as a current limiter, and that the total current draw allow
ed is simply a matter of using different wattage bulbs, using the standard
formula of:- I = P/E-- =0A=0AMark Bitterlich =0AN50YK=0A=0A-=0A
=0A=0A=0A________________________________=0AFrom: Graeme Frew <graemefrew@g
mail.com>=0ATo: yak-list@matronics.com=0ASent: Tuesday, December 30, 2008 5
:36:06 AM=0ASubject: Yak-List: More Nanchang VR Stuff=0A=0AHi All,=0AThis N
anchang voltage regulator stuff is very topical for me right now. I have a
syndicate member stuck in the middle of the South Island of NZ with our CJ
that keeps blowing the main power 50 amp fuse. He has had an avionics guy s
cratching his head over the system for two expensive days now and they are
no closer to a solution. I've had no end of problems with my VR so my engin
eer cobbled together a VR using a Harvard part as a start point. It has wor
ked flawlessly for two years but now it seems we have a major problem. I've
sent the avionics guy all the electrical diagrams I have from the CJ manua
ls and he doesn't seem to be any closer to pin pointing the problem. I was
advised through this list a couple of years ago to chuck the VR over my lef
t shoulder and fit an alternator. At the time it seemed like an expensive s
olution but right now it is a path I wish I had gone down. In my humble opi
nion an alternator seems like a good long term solution if you
are having electrical trials with your CJ. Hind sight is a wonderful thing
.=0AHappy New Year from those of us first to see it in.=0ARegards to all on
==
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: More Nanchang VR Stuff |
Oops, I forgot to mention.- Blowing the 50 amp main fuse is pretty rare.
- I would offer this one test before using my message describing the ligh
t bulb test method.- Turn the generator off.- Start the engine.- Run
the engine up to 60% or more.- Now turn the generator on.- Does the fus
e blow?- Hopefully not.- Slowly bring the generator down to idle and wa
tch the current.- If at idle you see massive neg. current and the fuse th
en blows, you have a reverse current issue.- When the engine is not turni
ng the generator fast enough, or the generator is not turning at all, there
is a direct current path to ground from the battery to the generator.- T
his is true of ANY aircraft using a generator!- In every case, there is a
reverse current cutout relay to prevent this.- In the Russian aircraft t
his is the 200 relay.- I have no idea what it is on the CJ, but there HAS
to be one.- If this relay sticks closed, or gets spot welded closed (hap
pens with
old relays) then as soon as you turn on the aircraft master, the 50 amp fu
se will blow.-- Every time.- Turning off the generator might not be a
good test if the relay has frozen closed.- In this case you need to disc
onnect the generator wiring.- Turn on the electrical master.-The fuse s
hould not blow.- -See if battery voltage appears on the generator PLUS
wire that you now have disconnected.- If it does... your reverse current
relay is stuck closed.- Also try starting and running it with the gen wir
ing disconnected.- If none of that works, go back to using the light bulb
for troubleshooting.- If this reverse current relay is stuck closed, it
might also have smoked the generator, but not all the time.- It might sur
vive.- =0A=0AMark Bitterlich=0AN50YK=0A=0A-=0A=0A=0A=0A________________
________________=0AFrom: Graeme Frew <graemefrew@gmail.com>=0ATo: yak-list@
matronics.com=0ASent: Tuesday, December 30, 2008 5:36:06 AM=0ASubject: Yak-
List: More Nanchang VR Stuff=0A=0AHi All,=0AThis Nanchang voltage regulator
stuff is very topical for me right now. I have a syndicate member stuck in
the middle of the South Island of NZ with our CJ that keeps blowing the ma
in power 50 amp fuse. He has had an avionics guy scratching his head over t
he system for two expensive days now and they are no closer to a solution.
I've had no end of problems with my VR so my engineer cobbled together a VR
using a Harvard part as a start point. It has worked flawlessly for two ye
ars but now it seems we have a major problem. I've sent the avionics guy al
l the electrical diagrams I have from the CJ manuals and he doesn't seem to
be any closer to pin pointing the problem. I was advised through this list
a couple of years ago to chuck the VR over my left shoulder and fit an alt
ernator. At the time it seemed like an expensive solution but right now it
is a path I wish I had gone down. In my humble opinion an alternator seems
like a good long term solution if you
are having electrical trials with your CJ. Hind sight is a wonderful thing
.=0AHappy New Year from those of us first to see it in.=0ARegards to all on
==
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Need mechanic TX |
Chris,
Contact me off list.
Mike Hastings
acromike@gmail.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=221865#221865
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Alternator/VR Replacement for the CJ |
Craig,
I agree that the alternator would provide a more stable power source but it is
not immune from overvoltage (most likely from a faulty VR). A Transorb surge protector
and a fuse would be a nice backup.
Keith
--------
Keith McKinley
700 HS
KFIT
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=221881#221881
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|