Today's Message Index:
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1. 05:52 AM - Re: M-14P Air Compressor (Rico Jaeger)
2. 07:50 AM - Re: Re: Hydraulic lock? (Bitterlich, Mark G CIV NAVAIR, WD)
3. 01:58 PM - Re: Re: Hydraulic Lock (Jill Gernetzke)
Message 1
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| Subject: | Re: M-14P Air Compressor |
Much appreciated, Doc! Thank you!!
On Mon, Apr 22, 2013 at 9:09 PM, Roger Kemp M.D. <viperdoc@mindspring.com>wrote:
> I do Rico. The problem is that it is one the maintenance posters that I
> got from West London Aeroclub. They are at the hanger so it will be
> tomorrow before I can get a pix of it. If memory serves George Coy's
> website has the YAK 52 parts manual among others on it. There is a blow up
> of the compressor in the parts manual.sorry man, that is about the only
> thing on the M-14 that I have not torn apart. ;^))
> Doc
>
> Sent from my iPad
>
> On Apr 22, 2013, at 1:09 PM, Rico Jaeger <rijaeger@wausau.k12.wi.us>
> wrote:
>
> Greetings from (still) Wintery Wisconsin! I may be in the market for a set
> of Yak Skis soon...
>
> 'Still chasing air system woes. Does anyone have an exploded view of the
> air compressor they'd be willing to share? THANX!!
> --
> Rico Jaeger
> Choir / East High School
> General Music / Horace Mann
>
> *
>
> ==================================
> //www.matronics.com/Navigator?Yak-List
> ===================================cs.com
> ===================================matronics.com/contribution
> ==================================
> *
>
> *
>
> *
>
>
--
Rico Jaeger
Choir / East High School
General Music / Horace Mann
Message 2
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| Subject: | Re: Hydraulic lock? |
Also prime it a lot and make sure fuel flows out the intake drains verifying they
are not clogged up.
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis Savarese
Sent: Monday, April 22, 2013 17:16
Subject: Re: Yak-List: Re: Hydraulic lock?
Only one - pull the rear plugs. The airplane still sits at a slightly
nose-high attitude on the ground. A little more of a pain. But
definitely worth the effort.
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 4/22/2013 3:50 PM, andrew.park wrote:
> I hate to bore you all with this subject but to save an inexperienced
> Yak guy the same fate as poor Mark I'd apprciate just one more day of
> advice. The original post from Mark was about his aircraft not flying
> for 6 months which resulted in his hydrauliced engine. I am in the
> same situation having not started my 18t for 2 months however I have
> swung the prop 18 times every 2 weeks. It has the drain mods and
> obviously its not a tail dragger. So this Sat im going to start it
> rain or shine. Its still fairly warm here, t shirt and shorts weather.
> Ive noted I have lost a lot of oil on the dip stick. Reading the past
> days comments I should do the following:
>
> 1/ pull the prop thru 18 times with drains open
> 2/ remove front spark plugs from lower 3 cylinders and pull thru 18
> times and refit plugs
> 3/ prime engine with Mags off and throttle off, pull thru until I get
> clean fuel thru drains
>
> Any comments?
>
>
> Andrew Park
> New Zealand
>
>
> -------- Original message --------
> From: Didier Blouzard <didier.blouzard@gmail.com>
> Date: 23/04/2013 8:06 AM (GMT+12:00)
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: Hydraulic lock?
>
>
> I add this to my Must Do List
> Thanks Dennis
>
> Didier
>
>
> 2013/4/22 A. Dennis Savarese <dsavarese0812@bellsouth.net
> <mailto:dsavarese0812@bellsouth.net>>
>
> <dsavarese0812@bellsouth.net
> <mailto:dsavarese0812@bellsouth.net>>
>
> Particularly when the temps get below 0 C it is a VERY
> good idea to have a heat pad on the oil cooler or use some
> sort of heater to warm the oil in the oil cooler.
>
> I know of one that literally blew apart in the very cold
> winter weather when the oil tank and sump and engine
> compartment were heated, but the oil cooler wasn't.
>
>
> A. Dennis Savarese
> 334-285-6263 <tel:334-285-6263>
> 334-546-8182 <tel:334-546-8182> (mobile)
> www.yak-52.com <http://www.yak-52.com>
> Skype - Yakguy1
>
> On 4/22/2013 2:32 PM, Didier Blouzard wrote:
>
> Interesting.
> I also did put on my main tank EZ Heat systems. Two
> pads and on the oil sump one pad.
> A very very good aftersales service.
> One of my pas did not work and without any question
> they sent me a replacement.
> Since now 3 years I am using them and it works
> perfectly fine.
>
> Works very well. When temperature is below minus 5 you
> must also use an air heater to warm cylinders and it
> take about 40mn to warm up to 10 degres oil and 15
> degres cyl temp.
> That's really great to start warm
>
> Good to share experience on that
>
>
> Didier
>
>
> 2013/4/22 Bitterlich, Mark G CIV NAVAIR, WD
> <mark.bitterlich@navy.mil
> <mailto:mark.bitterlich@navy.mil>
> <mailto:mark.bitterlich@navy.mil
> <mailto:mark.bitterlich@navy.mil>>>
>
>
> CIV NAVAIR,
> WD" <mark.bitterlich@navy.mil
> <mailto:mark.bitterlich@navy.mil>
> <mailto:mark.bitterlich@navy.mil
> <mailto:mark.bitterlich@navy.mil>>>
>
>
> Didier,
>
> I've put an electric heater on the oil tank itself,
> and have seen
> them mounted on the sump as well. These are typically
> "EZ-Heat"
> type devices:
>
> http://e-zheat.com/shop/
>
> My oil cooler has also been changed "back" to having a
> veratherm
> (basically a thermostat) internal to the oil cooler
> itself. This
> serves two purposes, first it allows the oil to warm
> up must
> faster, and two ... it helps to prevent an
> over-pressure situation
> in the cooler when the engine is started under very cold
> conditions without pre-heat. There was actually a
> change in the
> YAK-50 design that pulled these things OUT of the oil
> cooler at
> one time. I'm not sure why, maybe Richard Goode might
> know. In any
> case, mine works very well.
>
> Mark
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> <mailto:owner-yak-list-server@matronics.com>
> <mailto:owner-yak-list-server@matronics.com
> <mailto:owner-yak-list-server@matronics.com>>
> [mailto:owner-yak-list-server@matronics.com
> <mailto:owner-yak-list-server@matronics.com>
> <mailto:owner-yak-list-server@matronics.com
> <mailto:owner-yak-list-server@matronics.com>>] On
> Behalf Of Didier
> BLOUZARD
> Sent: Saturday, April 20, 2013 4:18
> To: yak-list@matronics.com
> <mailto:yak-list@matronics.com>
> <mailto:yak-list@matronics.com
> <mailto:yak-list@matronics.com>>
> Subject: Re: Yak-List: Re: Hydraulic lock?
>
> <didier.blouzard@gmail.com
> <mailto:didier.blouzard@gmail.com>
> <mailto:didier.blouzard@gmail.com
> <mailto:didier.blouzard@gmail.com>>>
>
>
> Nobody mentioned that when parking for a long time
> you'll loose
> less time and sweat to drain all oil out of the motor.
> And when
> coming back before starting warm the oil outside the
> plane before
> putting it back. Then you'll be sure that there can't
> be oil in
> your lower cylinder?
> Plus oil will be warm before starting
>
> ~,gM4Gqz.'8a
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> >-Zvkkj+x
> 'ojj+a
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> SPI'j[(jzyhikx&i
> kx&.+-
> &*'YN*.~zw,hjCex
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> 'o{k
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Message 3
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| Subject: | Re: Re: Hydraulic Lock |
Good feedback, Mark.
Most prop strikes occur with wood composite or carbon fiber blades. (We
haven't had a prop strike teardown with a metal prop, yet.) The inertia of
energy is absorbed by the blades disintegrating or being shaved off.
I agree with your assessment of a hydraulic lock on startup, but not when
the engine fires and it pulls fuel or oil in from the intake tubes. If it
fires, there is a good likelihood that the accessory shaft will twist.
At landing speed, the aircraft travels 3.5 feet for each blade in contact
with the ground at initial point of contact. As the engine slows, this
increases. Consequently, the rearward deflection of a very thin blade
exceeds the rotational shearing. Additionally, the reduction of blade
length per rotation with a normal flare landing is less than a tenth of an
inch. In other words, the wood fails well before any engine parts are
stressed to the +400 foot/lbs of torque design load.
Jill
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