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trond.sorgard(at)gmail.co
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 Posted: Sun Nov 16, 2014 4:13 am Post subject: Propeller cycle and pitch issue |
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Hello
Im new in this forum.
I am Trond from Norway.
I have a Yak-52W 2000model
I have problems with my governor/propeller or something else.
To explain.My last flight, f.eks after a low pass when climbing quickly, engine couldnt keep set rpm .. Rpm fell ..resulted in lower speed aswell... lower than normal at this climb angel ...and i have to rapidly put nose down not to stall... You could feel the lack off power. I flew to airfield and landed.
I decided to change governor. Thinking this was it according to hours run.
Termikas changed my governor.
At test runs on ground everything seemed ok. There wasnt weather for flight tests..anyway..Problem thought to be solved.
Then next flight 3 weeks later..when doing run up for testflight. And trying to cycle.
The propeller would not go coarse.
When i tried to cycle with rpm handle nothing happens. I tried everything for 30 minutes. Throttle upp down.. Rpm handle up and down. Different settings..Nothing.
No change in rpm.
Flight was offcourse aborted.
What could be wrong?
Governor is new.. Could this still be a faulty governor??
Or do i have a propeller issue?
Returnline blocked???
Anybody have drawing of oil system on governor and propeller ?I dont in my manuals.
Or have drawings on total oil system included in engine drawing with governor and propeller.???
Are there return filters from propeller to oil tank??
I have a hoffman 3blade propp. If i take the propeller off my yak...and lay it on ground in hangar, should i be able to turn pitch on blades with my hands. F.ex tree guys one on each blade??
Best regards
Trond Sorgard
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picko
Joined: 20 Nov 2013
Posts: 13
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| Posted: Sun Nov 16, 2014 4:26 am Post subject: Propeller cycle and pitch issue |
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Have sent email with PDF mp14 engine manual. Governor schematic included.
Sent from Alspad.
| Quote: | On 16 Nov 2014, at 23:16, "Trond" <trond.sorgard(at)gmail.com> wrote:
Hello
Im new in this forum.
I am Trond from Norway.
I have a Yak-52W 2000model
I have problems with my governor/propeller or something else.
To explain.My last flight, f.eks after a low pass when climbing quickly, engine couldnt keep set rpm .. Rpm fell ..resulted in lower speed aswell... lower than normal at this climb angel ...and i have to rapidly put nose down not to stall... You could feel the lack off power. I flew to airfield and landed.
I decided to change governor. Thinking this was it according to hours run.
Termikas changed my governor.
At test runs on ground everything seemed ok. There wasnt weather for flight tests..anyway..Problem thought to be solved.
Then next flight 3 weeks later..when doing run up for testflight. And trying to cycle.
The propeller would not go coarse.
When i tried to cycle with rpm handle nothing happens. I tried everything for 30 minutes. Throttle upp down.. Rpm handle up and down. Different settings..Nothing.
No change in rpm.
Flight was offcourse aborted.
What could be wrong?
Governor is new.. Could this still be a faulty governor??
Or do i have a propeller issue?
Returnline blocked???
Anybody have drawing of oil system on governor and propeller ?I dont in my manuals.
Or have drawings on total oil system included in engine drawing with governor and propeller.???
Are there return filters from propeller to oil tank??
I have a hoffman 3blade propp. If i take the propeller off my yak...and lay it on ground in hangar, should i be able to turn pitch on blades with my hands. F.ex tree guys one on each blade??
Best regards
Trond Sorgard
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richard.goode(at)russiana
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| Posted: Sun Nov 16, 2014 9:17 am Post subject: Propeller cycle and pitch issue |
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Have you cleaned the filter in the oil supply to the governor?
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
--
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trond.sorgard(at)gmail.co
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| Posted: Sun Nov 16, 2014 11:37 am Post subject: Propeller cycle and pitch issue |
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No.
And i dont think Termikas did either.
I was not present when they did the governor change out.
Where is this filter located?
Regards Trond
Sendt fra min iPhone
[quote] Den 16. nov. 2014 kl. 18.16 skrev Richard Goode <richard.goode(at)russianaeros.com>:
Have you cleaned the filter in the oil supply to the governor?
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
--
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richard.goode(at)russiana
Guest
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| Posted: Mon Nov 17, 2014 4:46 am Post subject: Propeller cycle and pitch issue |
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There is an oil gallery running along the top of the gearbox, but part of
the original casting. On that there is a large hexagonal plug, and under
that is the filter. Obviously if it becomes restricted, then the governor
will not work correctly. It is conventional wire-mesh and easily washable.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
--
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dsavarese0812(at)bellsout
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| Posted: Mon Nov 17, 2014 6:55 am Post subject: Propeller cycle and pitch issue |
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Here's a photo of it. When you remove the hex plug, use a box end wrench and not an open end wrench because you can easily round off the flats on the hex because it is aluminum.
Dennis
| Quote: | A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1 |
On 11/17/2014 6:45 AM, Richard Goode wrote:
[quote] [quote]--> Yak-List message posted by: "Richard Goode" <richard.goode(at)russianaeros.com> (richard.goode(at)russianaeros.com) There is an oil gallery running along the top of the gearbox, but part of the original casting. On that there is a large hexagonal plug, and under that is the filter. Obviously if it becomes restricted, then the governor will not work correctly. It is conventional wire-mesh and easily washable. Richard Goode Aerobatics Rhodds Farm Lyonshall Hereford HR5 3LW Tel: +44 (0) 1544 340120 Fax: +44 (0) 1544 340129 www.russianaeros.com --
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trond.sorgard(at)gmail.co
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| Posted: Mon Nov 17, 2014 11:08 am Post subject: Propeller cycle and pitch issue |
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YAKY52
Joined: 08 Oct 2013
Posts: 8
Location: Bergamo Italy
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| Posted: Tue Nov 18, 2014 3:51 pm Post subject: Re: Propeller cycle and pitch issue |
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Due to my recent experience on this subject, check first the propeller blades free of travel, take off the front hub (easy and no pain ops) and try to opereate the pitch mechanism by hand.
there is not much of lubrication there and moisture after some time mess up bearings and other parts.
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trond.sorgard(at)gmail.co
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| Posted: Tue Nov 18, 2014 4:02 pm Post subject: Propeller cycle and pitch issue |
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Hello
I have done that.
Had it of yesterday. Tried to move blades.
Where not able to move the blades.
I have a 3-blade hoffman propeller.
What propp do you have?
Regards Trond
Sendt fra min iPhone
| Quote: | Den 19. nov. 2014 kl. 00.51 skrev YAKY52 <vulavula(at)libero.it>:
Due to my recent experience on this subject, check first the propeller blades free of travel, take off the front hub (easy and no pain ops) and try to opereate the pitch mechanism by hand.
there is not much of lubrication there and moisture after some time mess up bearings and other parts.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=433996#433996
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