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dreel(at)cox.net
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 Posted: Thu Apr 27, 2006 4:52 am Post subject: Mysterious Oil Leak |
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Whenever I remove the nosewheel fairing cap to check the security of my =
RV8A nose gear leg fairing, I notice a ring of oil collected atop the =
nosewheel rotation limit stop. I can't think of any possible source for =
oil down here. Grease yes, but not oil. Has anyone observed a similar =
mystery? Has anyone got a clue?
Dave Reel - RV8A 10 hrs
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KBelue(at)drs-tem.com
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| Posted: Thu Apr 27, 2006 5:05 am Post subject: Mysterious Oil Leak |
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I've noticed when I change oil, if I get any oil in the nose gear mount (the
boxed section where the nose gear goes into the engine mount) oil will
appear at the bottom of the gear leg for a long time. I spray engine cleaner
in this boxed area and spray it with a high pressure hose to clean it out.
Kevin D. Belue
[quote] --
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jclarkmail(at)gmail.com
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| Posted: Thu Apr 27, 2006 5:06 am Post subject: Mysterious Oil Leak |
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I have seen something similar on a friends RV9A.
I suspect there is some low pressure/suction in the area that is pulling a
drop or two from the engine compartment down the faring. Have not
investigated further.
James
On 4/27/06, DAVID REEL <dreel(at)cox.net> wrote:
| Quote: |
Whenever I remove the nosewheel fairing cap to check the security of my =
=3D
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| Quote: | RV8A nose gear leg fairing, I notice a ring of oil collected atop the =3D
nosewheel rotation limit stop. I can't think of any possible source for =
=3D
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| Quote: | oil down here. Grease yes, but not oil. Has anyone observed a similar =
=3D
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| Quote: | mystery? Has anyone got a clue?
Dave Reel - RV8A 10 hrs
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--
This is an alternate email. Please continue to email me at
james(at)nextupventures.com .
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sportav8r(at)aol.com
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| Posted: Thu Apr 27, 2006 5:44 am Post subject: Mysterious Oil Leak |
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Ditto. The spilled engine oil weeps out of the rivet holes all along the fairing as well as out the bottom, onto the pant. Disgusting looking, but really cool how it shows the air streamlines 
I try to avoid spilling any oil into the gear/engine mount for this reason, but when cleaning the high pressure screen, it's hard not to drop some down there.
-Stormy
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Mark Phillips in TN
Joined: 10 Jan 2006
Posts: 431
Location: Columbia, TN
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| Posted: Thu Apr 27, 2006 8:55 am Post subject: Mysterious Oil Leak |
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In a message dated 4/27/06 7:53:43 AM Central Daylight Time, dreel(at)cox.net
writes:
| Quote: | . I can't think of any possible source for =
oil down here.
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I'll hazard a SWAG assuming the 8-A is similar to my 6-A: air at top of leg
fairing is higher pressure (open to lower cowl near outlet) than at bottom- I'd
kinda believe that the relative pressure along the surface of the
pressure-recovery wheel pant is lower, except at the front. Oil mist travels down the
leg and gathers along the bent section of leg. Is the inside of the leg fairing
coated with an oily film or if you place a paper towel against the rear edge
of the fairing does it expose oil seepage from the joint?
Mark Phillips do not archive
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From The PossumWorks... |
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dreel(at)cox.net
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| Posted: Fri Apr 28, 2006 3:30 am Post subject: Mysterious Oil Leak |
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Thanks for the info guys. I went to the airport & low & behold, there was
some oil on the back of the triangular plate that forms the nose gear leg
support box on the bottom of the engine mount. The back of the leg above
the fairing was also oily and black. The fairing is unpainted & I couldn't
see any oil on it when I shined a strong light on it. I didn't disassemble
it to check because I've been having trouble getting the fairing to stay in
position on the gear leg & didn't want to upset my latest attempt to secure
it. I think it's quite likely the oil is being sucked down by
gravity/airflow along the gear leg as you guys have said. No need to worry
about anything rusting down there.
Dave Reel
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