---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sat 01/03/09: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 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 _____________________________________ Time: 02:31:21 PM PST US From: Yak Pilot Subject: Re: Yak-List: 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 =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 _____________________________________ Time: 04:24:47 PM PST US From: ronald wasson 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 3 _____________________________________ Time: 05:03:51 PM PST US From: "Mark Davis" Subject: Re: Yak-List: 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" 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 _____________________________________ Time: 11:08:40 PM PST US From: cjpilot710@AOL.COM Subject: Re: Yak-List: 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 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. **************New year...new news. 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