Today's Message Index:
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1. 02:31 PM - Re: Message to Mark (Yak Pilot)
2. 04:24 PM - cj down north of fort worth (ronald wasson)
3. 05:03 PM - Re: cj down north of fort worth (Mark Davis)
4. 11:08 PM - Re: cj down north of fort worth (cjpilot710@AOL.COM)
Message 1
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| Subject: | Re: Message to Mark |
This is a correction to an earlier posting.- Rob Rowe caught me speeding
in my write-up concerning the blowing fuse issue concerning my exact wordin
g.- His correction concerns the individual parts contained in the Combine
d (relay) Device, which I described in a very loose and less than perfectly
technical fashion.- Rob was the only person who caught it.- -Below i
s my correction (brought to my attention by Rob): =0A-=0AWhen I said: "If
the reverse current protection relay was stuck closed, it (the fuse) shoul
d blow as=0Asoon as electrical MAIN power is turned on"- What I SHOULD ha
ve said was: --=93If the MAIN CONTACTOR CONTROL RELAY (one of several r
elays inside of the Combined Device) was stuck closed, it should blow the f
use as soon as the Battery Electrical Master turned was turned on=94.-
=0A-=0AIf the Differential Relay/Polarized Relay or "Reverse Current Rela
y" (as it is also called) stuck closed, it would in fact enable the main co
ntactor relay to close as soon as the generator started spinning and genera
ting enough output voltage.- If the generator was not spinning, there is
no output from it, thus the fuse would NOT blow as soon as the battery elec
trical master was turned on. -However once the engine started and the gen
erator put out around 14-16 volts or so, which it would do at idle=85. then
the Main Contactor WOULD indeed close, completing the path from the batter
y to the generator=85 thus allowing reverse current to flow and the fuse wo
uld blow as well.- =0A-=0AThat said, -I am still not sure if the gene
rator blows as soon as you turn on the master battery power, or if the engi
ne has to be running for it to blow.- -If it blows on power up, then I
would suspect the contacts on the main power contactor are indeed welded sh
ut.- If it blows the fuse only with the engine running at idle, then I wo
uld suspect the polarity relay is stuck closed allowing the main contactor
to close as soon as the generator puts out enough voltage to close the main
contactor relay coil, which is way way below 24 volts.- =0A-=0ARegardl
ess, both problems would be cured by replacing the Combined Device which al
l of the parts mentioned above are contained in!- - =0A-=0AMark Bitte
rlich=0AN50YK=0A-=0Ap.s.- Thanks to Rob Rowe for catching my error.-
Of course all of this assumes there is nothing like- a basic short to gro
und in the aircraft wiring itself.- The replacement of the fuse with a li
ghtbulb of the proper wattage trick is still just as viable in troubleshoot
ing as was mentioned before.- =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
Message 2
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| Subject: | cj down north of fort worth |
Forest Johnson crashed just north of propwash airport (16x) Gear
and flaps down on the base to final turn. He was lead in a 3 ship.
Hit hard nose down . Might be a stall spin accident. Both dead.
There was a fire afterward.
Message 3
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| Subject: | Re: cj down north of fort worth |
Found the following on the web:
http://cbs11tv.com/local/fatal.plane.crash.2.899387.html
Rest in peace, "Flush".
Mark Davis
N44YK
----- Original Message -----
From: "ronald wasson" <ronwasson@mindspring.com>
Sent: Saturday, January 03, 2009 5:23 PM
Subject: Yak-List: cj down north of fort worth
>
> Forest Johnson crashed just north of propwash airport (16x) Gear
> and flaps down on the base to final turn. He was lead in a 3 ship.
> Hit hard nose down . Might be a stall spin accident. Both dead.
> There was a fire afterward.
>
>
>
Message 4
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| Subject: | Re: cj down north of fort worth |
In a message dated 1/3/2009 7:25:15 P.M. Eastern Standard Time,
ronwasson@mindspring.com writes:
What a bad way to start a new year. I liked "Flush". He was a decent
person and love formation flying.
Can anyone give us some accurate details? Who was he leading? Any radio
chatter? Who was the GIB?
Jim "Pappy" Goolsby
--> Yak-List message posted by: ronald wasson <ronwasson@mindspring.com>
Forest Johnson crashed just north of propwash airport (16x) Gear
and flaps down on the base to final turn. He was lead in a 3 ship.
Hit hard nose down . Might be a stall spin accident. Both dead.
There was a fire afterward.
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