Today's Message Index:
----------------------
1. 08:41 AM - Re: Re: Airshow : Yak-52 Aerobatic Display. (Robin Hou)
2. 12:09 PM - Re: Airshow : Yak-52 Aerobatic Display. (Etienne Verhellen)
3. 03:25 PM - Leaky Prop (Robin Hou)
4. 03:50 PM - Re: Leaky Prop (Bill Geipel)
5. 06:13 PM - Re: Leaky Prop (Walter Lannon)
6. 06:48 PM - Re: Leaky Prop (A. Dennis Savarese)
7. 08:04 PM - Re: CJ canopy seal (keithmckinley)
8. 08:12 PM - Re: CJ canopy seal (keithmckinley)
9. 08:16 PM - looking for help with "mushy" brakes on CJ (keithmckinley)
10. 09:35 PM - Re: Leaky Prop (Roger Kemp M.D.)
11. 09:42 PM - Re: looking for help with "mushy" brakes on CJ (Roger Kemp M.D.)
12. 10:21 PM - Re: Re: CJ canopy seal (Walter Lannon)
13. 10:21 PM - Re: looking for help with "mushy" brakes on CJ (Sam Sax)
Message 1
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| Subject: | Re: Airshow : Yak-52 Aerobatic Display. |
Great pictures! Thanks for sharing.
Any video?
Message 2
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| Subject: | Re: Airshow : Yak-52 Aerobatic Display. |
If you insist ... :D and there is nothing worth watching on TV
(as it's usually the case) ...
Lens Airshow in the North of France :
http://youtu.be/X0xVxRt7498
http://youtu.be/bSswo8pwly0
http://www.pbase.com/fournier/image/146113478
http://www.pbase.com/fournier/image/146788728
http://forums.matronics.com/files/yak_52_lens_airshow_2012__pilote_etienne_verhellen_109.jpg
http://forums.matronics.com/files/yak5227_122.jpg
http://forums.matronics.com/files/yak_52_g_cbss_etienne_verhellen_781.jpg
http://fanairplane.free.fr/affichage2.php?img=15646
...
Annual International Sanicole Airshow (ISA), Belgium :
http://youtu.be/nEp-WMjJdvw
http://youtu.be/mk8bHKoSpBo
http://www.airshowactionphotography.com/san07/sanicole07_007.jpg
http://www.airshowactionphotography.com/san07/sanicole07_018.jpg
http://www.airshowactionphotography.com/san07/sanicole07_015.jpg
...
Cerfontaine airfield (EBCF), Belgium also called Gravity Park,
the friendliest Yakovlevs airfield in Europe :
http://youtu.be/dBeOu-hrRYc
http://youtu.be/-WQQ0g9SI_s
http://youtu.be/n2e8f7_1ohQ
http://www.gravitypark.be/Flyin/Flyinconfirmedaircrafts/tabid/215/Default.aspx
http://www.gravitypark.be/Galerie/2008YakFlyin/tabid/224/Default.aspx
http://www.gravitypark.be/Portals/0/Images/Events/Flyin%20gallery/cerfontaine005lw2%20-%20picture%20by%20Alain%20Bartier.jpg
...
Various :
http://youtu.be/dxfLFmXklQo
http://youtu.be/0ms0PGBN55g
http://www.rtbf.be/video/detail?id=1730533
http://www.youtube.com/watch?v=M9nQRcR8y40
http://forums.matronics.com/files/yak_52_etienne_going_up__246.jpg
...
It was raining today ... so no Yakovlevs flying [Rolling Eyes]
--------
http://forums.matronics.com/files/corsair_oe_eas_and_yak_52_g_cbss_212.jpg
http://ukga.com/content/view?contentId=29581
http://ukga.com/images/content/image29581.jpg
http://www.flyredstar.org/gallery2/Yak/Etienne%20landing%20in%20YVR.jpg
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410433#410433
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http://forums.matronics.com//files/appareil_saranne_012_138.jpg
http://forums.matronics.com//files/airshow__yak_52_aerobatic_display__etienne_verhellen_28_105.jpg
http://forums.matronics.com//files/airshow__yak_52_aerobatic_display__etienne_verhellen_27_135.jpg
http://forums.matronics.com//files/airshow__yak_52_aerobatic_display__etienne_verhellen_21_117.jpg
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http://forums.matronics.com//files/airshow__yak_52_aerobatic_display__etienne_verhellen_15_499.jpg
http://forums.matronics.com//files/airshow__yak_52_aerobatic_display__etienne_verhellen_13_387.jpg
http://forums.matronics.com//files/airshow__yak_52_aerobatic_display__etienne_verhellen_9_863.jpg
http://forums.matronics.com//files/airshow__yak_52_aerobatic_display__etienne_verhellen_8_113.jpg
http://forums.matronics.com//files/airshow__yak_52_aerobatic_display__etienne_verhellen_2_148.jpg
Message 3
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I took my CJ for a short hop yesterday. Upon landing, the gill shutters wer
e coated with oily mist. It feels heavier than my Phillips XC 25-60, but li
ghter than the grease used in the prop hub. Looking through the gill shutte
rs, the engine case appeared dry. I was in a hurry to get home so did not c
losely exam the source of the leak. The prop was holding rpm just fine the
entire flight, and responded normally when changed rpm.-=0A=0ACan anyone
read the tea leaves and tell where the leak is coming from?=0A=0AThanks in
advance,=0A=0ARobin Hou
Message 4
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Tragic! I'll give you a hundred dollars as is where is?
On Oct 13, 2013, at 17:23, Robin Hou <rmhou@yahoo.com> wrote:
> I took my CJ for a short hop yesterday. Upon landing, the gill shutters we
re coated with oily mist. It feels heavier than my Phillips XC 25-60, but li
ghter than the grease used in the prop hub. Looking through the gill shutter
s, the engine case appeared dry. I was in a hurry to get home so did not clo
sely exam the source of the leak. The prop was holding rpm just fine the ent
ire flight, and responded normally when changed rpm.
>
> Can anyone read the tea leaves and tell where the leak is coming from?
>
> Thanks in advance,
>
> Robin Hou
> <IMAG0586-1280.jpg>
> <IMAG0587-1280.jpg>
Message 5
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Hi Robin;
Very strange!
I don=99t believe the prop is the culprit.
The prop blade partially shown in the photo shows no evidence of grease
(or oil) leakage. Oil leakage from the prop has to originate in the
pitch change area, usually one or both of the piston/cylinder seals or
from the transfer tube gasket in the crankshaft. A leaking inner seal
or tube gasket will leak into the hub and out past the blade grease
seals. Both of those and a leaking outer seal will also leak from the
front of the hub and transfer oil to the blades.
This leak is originating behind the prop. The most likely source is
the crankshaft thrust bearing. Unlike horizontally opposed engines
there is no seal or gasket to prevent thrust bearing lube oil from
leaking out. In most radials (though I do not know for sure how the
Huosai does it) there is a simple slinger ring between the inner race of
the bearing and the bearing thrust nut on the crankshaft. This collects
the bearing oil and =9Cslings=9D it back into the nose case.
The usually reason for leakage from that location is pressure in the
case due to a blocked vent.
Not good at reading tea leaves so the above is just a wild assed guess
(WAG).
Good luck;
Walt
From: Robin Hou
Sent: Sunday, October 13, 2013 3:23 PM
Subject: Yak-List: Leaky Prop
I took my CJ for a short hop yesterday. Upon landing, the gill shutters
were coated with oily mist. It feels heavier than my Phillips XC 25-60,
but lighter than the grease used in the prop hub. Looking through the
gill shutters, the engine case appeared dry. I was in a hurry to get
home so did not closely exam the source of the leak. The prop was
holding rpm just fine the entire flight, and responded normally when
changed rpm.
Can anyone read the tea leaves and tell where the leak is coming from?
Thanks in advance,
Robin Hou
Message 6
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When was the last time the seals in the prop hub piston were replaced? If n
ot from there, check the prop shaft seal. First guess is the hub piston inne
r and outer seals.
Dennis
On Oct 13, 2013, at 5:23 PM, Robin Hou <rmhou@yahoo.com> wrote:
> I took my CJ for a short hop yesterday. Upon landing, the gill shutters we
re coated with oily mist. It feels heavier than my Phillips XC 25-60, but li
ghter than the grease used in the prop hub. Looking through the gill shutter
s, the engine case appeared dry. I was in a hurry to get home so did not clo
sely exam the source of the leak. The prop was holding rpm just fine the ent
ire flight, and responded normally when changed rpm.
>
> Can anyone read the tea leaves and tell where the leak is coming from?
>
> Thanks in advance,
>
> Robin Hou
> <IMAG0586-1280.jpg>
> <IMAG0587-1280.jpg>
Message 7
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| Subject: | Re: CJ canopy seal |
Thanks Walt,
It's very hard to see looking directly at the area but I do see what you mean looking
at the detail in volume 1. My though is that without removing the front
windscreen or center section (for the rear seal). I'd have to use a cherrymax
rivet to reinstall?
My seals are dried out and rock hard.
Keith
--------
Keith McKinley
700HS
X26 Sebastian, FL
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410467#410467
Message 8
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| Subject: | Re: CJ canopy seal |
Thanks Walt,
It's very hard to see looking directly at the area but I do see what you mean looking
at the detail in volume 1. My though is that without removing the front
windscreen or center section (for the rear seal). I guess I'd have to use a cherrymax
rivet to reinstall?
My seals are dried out and rock hard.
Keith
--------
Keith McKinley
700HS
X26 Sebastian, FL
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410468#410468
Message 9
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| Subject: | looking for help with "mushy" brakes on CJ |
My brakes started to feel progressively mushy starting about 50 hours ago. Just
checked the drums and they looked fine and the pucks did not show much wear
at all (pucks and drums have around 200 hours on them ). I find that I'm pulling
the brake handle right up to the stick. I have some room to adjust the cable
on the front stick. Is there anything else I should be looking at? Steering
is normal, brake handle just doesn't seem crisp.
brakes just barely hold for prop check on run-up.
Keith
--------
Keith McKinley
700HS
X26 Sebastian, FL
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410469#410469
Message 10
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Probably a seal in the prop. Either the oil tube seal or the seal on the rim
of the piston if the CJ hub is built Ike the YAKs.
Doc
Sent from my iPad
On Oct 13, 2013, at 5:23 PM, Robin Hou <rmhou@yahoo.com> wrote:
> I took my CJ for a short hop yesterday. Upon landing, the gill shutters we
re coated with oily mist. It feels heavier than my Phillips XC 25-60, but li
ghter than the grease used in the prop hub. Looking through the gill shutter
s, the engine case appeared dry. I was in a hurry to get home so did not clo
sely exam the source of the leak. The prop was holding rpm just fine the ent
ire flight, and responded normally when changed rpm.
>
> Can anyone read the tea leaves and tell where the leak is coming from?
>
> Thanks in advance,
>
> Robin Hou
> <IMAG0586-1280.jpg>
> <IMAG0587-1280.jpg>
Message 11
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| Subject: | Re: looking for help with "mushy" brakes on CJ |
When is the last time the brake differential and the proportionator been rebuilt?
Doc
Sent from my iPad
On Oct 13, 2013, at 10:02 PM, "keithmckinley" <cetopfed@gmail.com> wrote:
>
> My brakes started to feel progressively mushy starting about 50 hours ago. Just
checked the drums and they looked fine and the pucks did not show much wear
at all (pucks and drums have around 200 hours on them ). I find that I'm pulling
the brake handle right up to the stick. I have some room to adjust the cable
on the front stick. Is there anything else I should be looking at? Steering
is normal, brake handle just doesn't seem crisp.
>
> brakes just barely hold for prop check on run-up.
>
> Keith
>
> --------
> Keith McKinley
> 700HS
> X26 Sebastian, FL
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=410469#410469
>
>
>
>
>
>
>
>
>
>
Message 12
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| Subject: | Re: CJ canopy seal |
Hi Keith;
I gave you a bit of a bum steer by referring to "tubing sections". Those
are only in the sliders, not the fixed sections. But I think you found my
error OK.
Rather than tubing the fixed section bows are formed aluminum alloy frames
riveted to the upper longerons. The part that the seal and retaining strip
are riveted to is the external surround that holds the Plexiglas in place
and is bolted to the frame with flush head screws. I think you will have
to remove this to replace the seal. There is very little room between this
and the aft face of the frame making it very difficult to drill out the
existing rivets. Cherry Max rivets will likely not be an option as there
is not enough space for the rivet stem. If you are able to get the old
rivets out without damaging the very soft retaining strip it may be possible
to use short 3/32" POP rivets.
However, you can remove the surround without removing the windshield or
center section glass though you would have to re-seal the glass on
re-installation.
Sorry for the misinformation.
Walt
-----Original Message-----
From: keithmckinley
Sent: Sunday, October 13, 2013 7:52 PM
Subject: Yak-List: Re: CJ canopy seal
Thanks Walt,
It's very hard to see looking directly at the area but I do see what you
mean looking at the detail in volume 1. My though is that without removing
the front windscreen or center section (for the rear seal). I guess I'd have
to use a cherrymax rivet to reinstall?
My seals are dried out and rock hard.
Keith
--------
Keith McKinley
700HS
X26 Sebastian, FL
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410468#410468
Message 13
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| Subject: | looking for help with "mushy" brakes on CJ |
Keith,
The braded steel cable stretches over time - this is the reason it is
getting closer and closer to the stick. If not mistaken (I did it a few
years ago), you can shorten the cable by adjusting the retaining nut in
front side of the stick column...
At some point you may want to replace with a braded stainless steel cable.
Sam Sax
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of keithmckinley
Sent: Sunday, October 13, 2013 11:03 PM
Subject: Yak-List: looking for help with "mushy" brakes on CJ
My brakes started to feel progressively mushy starting about 50 hours ago.
Just checked the drums and they looked fine and the pucks did not show much
wear at all (pucks and drums have around 200 hours on them ). I find that
I'm pulling the brake handle right up to the stick. I have some room to
adjust the cable on the front stick. Is there anything else I should be
looking at? Steering is normal, brake handle just doesn't seem crisp.
brakes just barely hold for prop check on run-up.
Keith
--------
Keith McKinley
700HS
X26 Sebastian, FL
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=410469#410469
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