Today's Message Index:
----------------------
1. 02:28 AM - Message to Mark (Graeme Frew)
2. 08:20 AM - Re: Need mechanic TX (Forrest Johnson)
3. 08:24 AM - Re: Need mechanic TX (bpx2horn@aol.com)
4. 03:29 PM - Re: Re: Alternator/VR Replacement for the CJ (Yak Pilot)
5. 03:35 PM - Re: Message to Mark (Yak Pilot)
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 |
|
G'day Listers and Mark B inparticular,
I've no idea whether what you've suggested will work Mark but it sounds like
good stuff to me and I've sent it on to the Avionics guy currently
scratching his head over this deal. I certainly appreciate your input. From
what I understand the fuse is blowing as soon as the battery is turned on
even without the generator running and with most other circuits
disconnected. Logic dictates this can't be as hard a problem as it seems but
that's why electrics is regarded as a dark science I guess.
Sometimes this list throws up some gems.
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: | Re: Need mechanic TX |
call me 817 366 3150 I am in Roanoke at 52F.
----- Original Message -----
From: "TXYak" <CKeating@peoplepc.com>
Sent: Tuesday, December 30, 2008 7:46 PM
Subject: Yak-List: 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 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: Need mechanic TX |
-----Original Message-----
From: Forrest Johnson <flushjohnson@charter.net>
Sent: Wed, 31 Dec 2008 10:19 am
Subject: Re: Yak-List: Need mechanic TX
?
call me 817 366 3150 I am in Roanoke at 52F.?
----- Original Message ----- From: "TXYak" <CKeating@peoplepc.com>?
Sent: Tuesday, December 30, 2008 7:46 PM?
Subject: Yak-List: 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 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: | Re: Alternator/VR Replacement for the CJ |
Keith, not meaning to disagree but, just to add to what you said.---
A Transorb is usually designed to protect against very short duration volta
ge spikes.- They are great for EMP type lightning pulse surges and also i
nductive field kicks.- Nothing wrong with putting them in an airplane, ot
her than the fact that they can act as a fuse when their ratings are exceed
ed and simply blow up.- Of course putting a real- fuse in series (like
you suggested) will help prevent that. -Voltage Regulator over-voltage fa
ilures are usually not transient, but instead sustained.- Typically the e
asy way to protect from voltage regulator failure is with some type of crow
bar circuit where when an over-voltage (sustained) condition occurs (over a
certain "set" voltage), a short circuit occurs that then blows a circuit b
reaker, which then opens a relay, which then totally disconnects the power
generation source from the aircraft mains.- The small B&C Alternator offe
rs
a kit that does exactly that.- The bigger B&C has that design protection
built right into their voltage regulator itself.- (Good product!)- =0A
=0ABeing the cheap SOB that I am, I have stayed with the original generator
design because all those folks that are switching to alternators make the
price for spare parts pretty darn cheap.- I can usually find a used gener
ator for about $100.- Compare that to getting a new alternator for exampl
e.- Just my 2 cents.- =0A=0AMark Bitterlich=0A=0A=0A=0A=0A_____________
___________________=0AFrom: keithmckinley <keith.mckinley@townisp.com>=0ATo
: yak-list@matronics.com=0ASent: Tuesday, December 30, 2008 11:32:12 PM=0AS
ubject: Yak-List: Re: Alternator/VR Replacement for the CJ=0A=0A--> Yak-Lis
t message posted by: "keithmckinley" <keith.mckinley@townisp.com>=0A=0ACrai
g,=0A=0AI agree that the alternator would provide a more stable power sourc
e but it is not immune from overvoltage (most likely from a faulty VR). A T
ransorb surge protector and a fuse would be a nice backup.=0A=0AKeith=0A=0A
--------=0AKeith McKinley=0A700 HS=0AKFIT=0A=0A=0A=0A=0ARead this topic onl
ine here:=0A=0Ahttp://forums.matronics.com/viewtopic.php?p=221881#221881
======
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: Message to Mark |
Thank you Graeme.- Just as an aside... reverse current will occur even wi
th the generator running.- It must be over 40%- engine RPM (or more)-
to spin it fast enough to stop this.- If the reverse current protection
relay was stuck closed, it should blow as soon as electrical MAIN power is
turned on.- If the reverse current relay is opening slowly... it could al
so happen at idle.- Bottom line, pull the wires of the generator complete
ly. ALL of them.- Then test it.- =0A=0AAlso, before much longer.. use t
he light bulb current limiter trick- in place of the fuse so that wiring
does not go up in smoke.- 50 amps or more is a significant current draw.
- That's the same as 1.4 KW and that is a LOT of heat.- =0A=0ABest of l
uck. =0A=0AMark Bitterlich=0A=0A-=0A=0A=0A=0A____________________________
____=0AFrom: Graeme Frew <graemefrew@gmail.com>=0ATo: yak-list@matronics.co
m=0ASent: Wednesday, December 31, 2008 5:26:32 AM=0ASubject: Yak-List: Mess
age to Mark=0A=0AG'day Listers and Mark B inparticular,=0AI've no idea whet
her what you've suggested will work Mark but it sounds like good stuff to m
e and I've sent it on to the Avionics guy currently scratching his head ove
r this deal. I certainly appreciate your input. From what I understand the
fuse is blowing as soon as the battery is turned on even without the genera
tor running and with most other circuits disconnected. Logic dictates this
can't be as hard a problem as it seems but that's why electrics is regarded
as a dark science I guess.=0ASometimes this list throws up some gems.=0A
===0A
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! --
|