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dsavarese0812(at)bellsout
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 Posted: Tue Apr 12, 2016 4:00 am Post subject: What are folks using for a Top-Dead-Center finder? |
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Try this. First, bring the #4 cylinder up on the compression stroke (you can feel the pressure push your finger off the spark plug hole. Next, insert the stop plug. Continue to rotate the prop in the same direction until the piston gently touches the stop plug. Now zero your degree tool, whether it's the cone type disk or the digital protractor. Rotate the prop in the opposite direction just enough to back the piston away from the stop plug. Remove the stop plug. Next, rotate the prop past the TDC point far enough to enable you to insert the stop plug again without it hitting the top of the piston. ie: reinstall the stop plug. Then rotate the prop backwards until the piston once again touches the stop plug. Read the number of degrees on the timing disk or digital protractor. Divide the number of degrees by 2. Remove the stop plug. Continue to rotate the prop backwards until you reach the number of degrees you arrived at when you divided the total number of degrees by 2. This should put the piston directly at TDC.
Hope this helps.
Dennis
From: JL2A <info(at)flyingwarbirds.com.au>
To: yak-list(at)matronics.com
Sent: Tuesday, April 12, 2016 7:31 AM
Subject: Re: What are folks using for a Top-Dead-Center finder?
--> Yak-List message posted by: "JL2A" <info(at)flyingwarbirds.com.au (info(at)flyingwarbirds.com.au)>
Could those that use the stop plug technique please illuminate others on the method? I get it for direct drive engines but not so much for our geared variety.. tried using it stop to stop degree of rotation divided by two, then added to initial prop angle value but answer was no where near TDC!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=454866#454866
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dsavarese0812(at)bellsout
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| Posted: Thu Apr 14, 2016 5:47 am Post subject: What are folks using for a Top-Dead-Center finder? |
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Yes. Don't hesitate to call if you have any questions.
Dennis
From: Greg Wrobel <clouddog22(at)gmail.com>
To: yak-list(at)matronics.com
Sent: Thursday, April 14, 2016 8:30 AM
Subject: Re: Re: What are folks using for a Top-Dead-Center finder?
Is this the same process for the Housai??
On Apr 12, 2016 7:13 AM, "A. Dennis Savarese" <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> wrote:
| Quote: | Try this. First, bring the #4 cylinder up on the compression stroke (you can feel the pressure push your finger off the spark plug hole. Next, insert the stop plug. Continue to rotate the prop in the same direction until the piston gently touches the stop plug. Now zero your degree tool, whether it's the cone type disk or the digital protractor. Rotate the prop in the opposite direction just enough to back the piston away from the stop plug. Remove the stop plug. Next, rotate the prop past the TDC point far enough to enable you to insert the stop plug again without it hitting the top of the piston. ie: reinstall the stop plug. Then rotate the prop backwards until the piston once again touches the stop plug. Read the number of degrees on the timing disk or digital protractor. Divide the number of degrees by 2. Remove the stop plug. Continue to rotate the prop backwards until you reach the number of degrees you arrived at when you divided the total number of degrees by 2. This should put the piston directly at TDC.
Hope this helps.
Dennis
From: JL2A <info(at)flyingwarbirds.com.au (info(at)flyingwarbirds.com.au)>
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Sent: Tuesday, April 12, 2016 7:31 AM
Subject: Re: What are folks using for a Top-Dead-Center finder?
--> Yak-List message posted by: "JL2A" <info(at)flyingwarbirds.com.au (info(at)flyingwarbirds.com.au)>
Could those that use the stop plug technique please illuminate others on the method? I get it for direct drive engines but not so much for our geared variety.. tried using it stop to stop degree of rotation divided by two, then added to initial prop angle value but answer was no where near TDC!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=454866#454866
http://www.matronics.com/Navigator?p; --> http:========================http://www.ma======================
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JL2A
Joined: 07 Apr 2015
Posts: 113
Location: Australia
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| Posted: Mon Apr 25, 2016 6:18 pm Post subject: Re: What are folks using for a Top-Dead-Center finder? |
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thanks Dennis, will give it a go
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