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gianenrico(at)gmail.com
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 Posted: Sat Aug 21, 2010 5:36 am Post subject: Governor |
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Ciao yakkisti!
We have this problem ... operating the propeller controls in the
cockpit the propeller speed is not properly responding.For transfer
flight we normally fly with the prop at 64% to save fuel, sometimes we
fly at 59%.Using the prop command now it is not possible to set
properly the speed.This happens in a random way, sometimes it is ok
sometimes it limit our control onto the aircraft.We checked oil
quantity and oil pressure an they are good.We did NOT checked if
there are boring in the oil, but the warning light it is OFF.we have
already checked the command line, from the cockpit lever to the pins
over the governor, all this seems ok.the engine itself is running in a
perfect way.No high temperature no particular problems.we have a small
leakage of oil on the top of the mast of the propeller (since last
december)but this is not a big deal.Another strange aspect we do not
know if it is correlated is about the minimum speed on the ground:with
maximum prop and minimum throttle the engine remains over 30%.we are
thinking that it might be a problem on the oil duct bringing oil from
the engine to the governor;i think that the problem is in the duct or
in the governor itself.we are wondering if it is safe to fly in this
condition
Thanks for your help!
2010/8/21, qaz11 <sinkar88(at)gmail.com>:
| Quote: |
The 15 tooth spline is the low gear gear case. It's designed to accommodate
a large dia prop. Depending on your size of boat, which you failed to
mention, I would have to say that a 14.25 X 17 thru 15 X 17 would be your
best bet. Now if you have a bass boat, the 13.5 dia.would be the correct
choise, but the 17 pitch would leave lot's to be desired hence that pitch is
for standard applications. That's a 1977 by the way. How big is your boat
?......................What you are describing is the length of the
barrel.wrong thrust washer or just the wrong prop. If it were mine I would
put a UN200PTC3R17S-3 with the UN087 thrust washer on there. But being you
are the E bay shopper, I would suggest crossing over the #'s that I have
described, for a more affordable application. That be a 14.25 X 17 for a
4.75 gear case. Glad to help. Good luck.
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Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=309611#309611
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dsavarese0812(at)bellsout
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| Posted: Mon Aug 23, 2010 4:46 am Post subject: Governor |
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Ciao,
Have you checked the prop governor screen on the nose case for blockage? See attached. Remove (19 mm wrench or socket), inspect for blockage and clean this oil passage screen. Be careful not to round the corners of the nut because it is a relatively soft aluminum. It is best to use a socket or box end 19 mm wrench to loosen.
When you run up the engine on the ground to 70% and pull the prop control lever full aft, the % RPM should come down to about 53%. Adjust the stop on the prop governor control arm to bring the engine down to 53%.
Regarding the idle RPM, that should be adjusted to 26% with the idle adjustment on the right side of the carburetor. The adjustment is under the knurled cover on the right side. Remove the knurled cover and you will see a slotted screw adjustment. See the M14 maintenance manual, section 073.10.03, Figure 201, #3. This is the knurled knob I referred to. Follow Task Card 204 to adjust the idle speed.
Hope this helps,
Dennis
[quote] ---
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Prop_Governor_Oil_Passage_Screen.pdf |
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talew(at)bellsouth.net
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| Posted: Mon Aug 23, 2010 5:20 am Post subject: Governor |
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Hi Dennis,
I had a similar problem with my CJ soon after it was certified to fly . The problem was that the clamp was loose on the housing of the
control cable allowing the housing to slip .
Terry
From: A. Dennis Savarese <dsavarese0812(at)bellsouth.net>
To: yak-list(at)matronics.com
Sent: Mon, August 23, 2010 8:45:25 AM
Subject: Re: Governor
Ciao,
Have you checked the prop governor screen on the nose case for blockage? See attached. Remove (19 mm wrench or socket), inspect for blockage and clean this oil passage screen. Be careful not to round the corners of the nut because it is a relatively soft aluminum. It is best to use a socket or box end 19 mm wrench to loosen.
When you run up the engine on the ground to 70% and pull the prop control lever full aft, the % RPM should come down to about 53%. Adjust the stop on the prop governor control arm to bring the engine down to 53%.
Regarding the idle RPM, that should be adjusted to 26% with the idle adjustment on the right side of the carburetor. The adjustment is under the knurled cover on the right side. Remove the knurled cover and you will see a slotted screw adjustment. See the M14 maintenance manual, section 073.10.03, Figure 201, #3. This is the knurled knob I referred to. Follow Task Card 204 to adjust the idle speed.
Hope this helps,
Dennis
[quote] ---
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dsavarese0812(at)bellsout
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| Posted: Mon Aug 23, 2010 8:03 am Post subject: Governor |
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Excellent point Terry.
Dennis
[quote] ---
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bwade154(at)yahoo.com
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| Posted: Mon Aug 23, 2010 9:38 am Post subject: Governor |
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Ciao Have you done the fuel burn and time to destination calculations? is there really enough savings in running the engine at that low an RPM or are you trying to build time. I fly the Yak 52 at 70-70 1.5 hours and time to fill. I've tried 64 but the engine seemed to run ruffer and with 30 gal my long distance traveling time is spent on the ground filling the tanks.
Bill Wade
From: A. Dennis Savarese <dsavarese0812(at)bellsouth.net>
To: yak-list(at)matronics.com
Sent: Mon, August 23, 2010 12:02:07 PM
Subject: Re: Governor
DIV { MARGIN:0px;} Excellent point Terry.
Dennis
[quote] ---
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