Today's Message Index:
----------------------
1. 05:10 AM - Re: Yak-52 Rudder Lock (A. Dennis Savarese)
2. 06:59 AM - Re: Adjusting rotor position on M9-35 mags (John Nafziger)
3. 07:32 AM - Re: Yak-52 Rudder Lock (cjpilot710@aol.com)
4. 07:59 AM - Re: Yak-52 Rudder Lock (Scooter)
5. 09:14 AM - Re: Yak-52 Rudder Lock ()
6. 10:03 AM - Re: Yak-52 Rudder Lock (kp)
7. 10:24 AM - Re: Yak-52 Rudder Lock (kp)
8. 02:02 PM - TICO (cjpilot710@aol.com)
9. 02:40 PM - Re: TICO (Scooter)
10. 08:11 PM - Re: A possible suggestion (Roger Bieberdorf)
11. 08:43 PM - Generator switch (Joe Howse)
12. 10:49 PM - Re: Yak-52 Rudder Lock (shinden33)
Message 1
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| Subject: | Re: Yak-52 Rudder Lock |
I pull a bungee cord from the rudder pedal in the rear cockpit to the
frame under the seat. The frame extends outside of the seat and is easy
to reach on either side. If the bungee cord is long enough, you can
loop it though the hole in the frame back toward the rudder pedal.
Works pretty good.
Dennis
----- Original Message -----
From: shinden33
To: yak-list@matronics.com
Sent: Friday, March 16, 2007 12:12 AM
Subject: Yak-List: Yak-52 Rudder Lock
All,
I still live in the desert and occasionally the airplane has to
sit out side in the wind. The seat belts work for a stick control lock
but I don't have a rudder lock. Any suggestions?
Scott
N8252
Message 2
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| Subject: | Re: Adjusting rotor position on M9-35 mags |
Groups,
I wanted to share what Ive learned with these M9-35 mags. Please note
these differ from the M9F mags that are typically on the M14P, so the
timing procedure is slightly modified from what Dennis summarized in
the prior email to the Yak list. Many thanks to Dennis and George Coy
for the help! George shared an excellent write up on Russian magnetos.
If anyone would like a copy, please email me and Ill pass along to
save George the headache.
I summarized Georges emails below:
The M9-35 has mechanical advance mechanism in the magneto. The angle
stamped on the magneto cover is the amount of advance angle (usually 30
to 35 deg). This is the amount the rotor will advance when the shaft
rotates above a certain RPM (I believe it is 600 RPM).
The rotor moves according to speed. It must LAG the #4 point at idle
and will LEAD as it advances 35 deg. If you put the rotor at the # 4
pin at static then when it advances 35 degrees when running, it will
fire the # 6 plug! There are only 40 deg between each spark plug
electrode (360 deg / 9 = 40 deg).
I am not sure the proper angle, but suspect you need to split the
difference. More Lag on the idle would put the finger closer to the
previous cylinder.
As long as the right mag is not used for starting and is off during
start I do not see why it could not be set up with more lag at static
so that the finger could be closer to the pin at the 35 deg advance
point. Of course then someone could exchange mags without realizing the
implications.
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| Subject: | Re: Yak-52 Rudder Lock |
In a message dated 3/16/2007 7:13:00 A.M. Eastern Standard Time,
dsavarese@elmore.rr.com writes:
I think bungee cords are a good idea. The damage is done when controls hit
their stops hard. Bungee is good while your airplane sit on static display
at airshows. One: the protection from wind banging. Two: crowd moving your
control as they WILL do when you're not looking.
I pull a bungee cord from the rudder pedal in the rear cockpit to the frame
under the seat. The frame extends outside of the seat and is easy to reach
on either side. If the bungee cord is long enough, you can loop it though
the hole in the frame back toward the rudder pedal. Works pretty good.
Dennis
----- Original Message -----
From: _shinden33_ (mailto:shinden33@earthlink.net)
Sent: Friday, March 16, 2007 12:12 AM
Subject: Yak-List: Yak-52 Rudder Lock
All,
I still live in the desert and occasionally the airplane has to sit out sid
e
in the wind. The seat belts work for a stick control lock but I don
=99t
have a rudder lock. Any suggestions?
Scott
N8252
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.co
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| Subject: | Re: Yak-52 Rudder Lock |
In the past I have used a rope attached from one rudder pedal to the stick (full
forward) and back to the other rudder pedal. Not sure if this is the best way
but something to consider.
Also with the stick full back rainwater will accumulate in the elevator (mine anyway)
because the drain holes are in the back.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=101009#101009
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| Subject: | Re: Yak-52 Rudder Lock |
Take a piece of 1/4 or 3/8 plywood. Cut two circles approx 6 inches in diameter.
Drill hole in center for eyebolt that is small enough to fit through slot
below rudder. Apply carpet to plywood. Attach rudder lock with eyebolt and
wing nut. I attach a remove before flight streamer to eye of the eyebolt. I
also put shrink wrap on the part of the eyebolt that will touch the rudder to
avoid chafing. Paint the wood red.
This is a home made version of control locks that are available from pilot shops.
Jim Shafer
> I still live in the desert and occasionally the airplane has to sit out side
> in the wind. The seat belts work for a stick control lock but I don't have
> a rudder lock. Any suggestions?
Message 6
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| Subject: | Re: Yak-52 Rudder Lock |
This is how they do it in Russia.
Personally I use a 1inch nylon luggage strap with non slip catch from the
left rudder pedal to the frame just aft of the front seat at shoulder
height.
kp
----- Original Message -----
From: <eyeballs@cox.net>
Sent: Friday, March 16, 2007 4:14 PM
Subject: Re: Yak-List: Yak-52 Rudder Lock
>
> Take a piece of 1/4 or 3/8 plywood. Cut two circles approx 6 inches in
diameter. Drill hole in center for eyebolt that is small enough to fit
through slot below rudder. Apply carpet to plywood. Attach rudder lock
with eyebolt and wing nut. I attach a remove before flight streamer to eye
of the eyebolt. I also put shrink wrap on the part of the eyebolt that will
touch the rudder to avoid chafing. Paint the wood red.
>
> This is a home made version of control locks that are available from pilot
shops.
>
> Jim Shafer
>
>
> > I still live in the desert and occasionally the airplane has to sit out
side
> > in the wind. The seat belts work for a stick control lock but I don't
have
> > a rudder lock. Any suggestions?
>
>
Message 7
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| Subject: | Re: Yak-52 Rudder Lock |
Actually I think the hoop in both pictures is an elevator one whereas the
correct rudder one drops lower over the fin.
----- Original Message -----
From: "kp" <pilko2@btinternet.com>
Sent: Friday, March 16, 2007 5:03 PM
Subject: Re: Yak-List: Yak-52 Rudder Lock
> This is how they do it in Russia.
>
> Personally I use a 1inch nylon luggage strap with non slip catch from the
> left rudder pedal to the frame just aft of the front seat at shoulder
> height.
>
> kp
> ----- Original Message -----
> From: <eyeballs@cox.net>
> To: <yak-list@matronics.com>
> Sent: Friday, March 16, 2007 4:14 PM
> Subject: Re: Yak-List: Yak-52 Rudder Lock
>
>
> >
> > Take a piece of 1/4 or 3/8 plywood. Cut two circles approx 6 inches in
> diameter. Drill hole in center for eyebolt that is small enough to fit
> through slot below rudder. Apply carpet to plywood. Attach rudder lock
> with eyebolt and wing nut. I attach a remove before flight streamer to
eye
> of the eyebolt. I also put shrink wrap on the part of the eyebolt that
will
> touch the rudder to avoid chafing. Paint the wood red.
> >
> > This is a home made version of control locks that are available from
pilot
> shops.
> >
> > Jim Shafer
> >
> >
> > > I still live in the desert and occasionally the airplane has to sit
out
> side
> > > in the wind. The seat belts work for a stick control lock but I
don't
> have
> > > a rudder lock. Any suggestions?
> >
> >
> >
> >
> >
> >
>
Message 8
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Just heard that a L-39 crashed and pilot killed at TIX during the show. I
didn't go today because of heavy steady rain here. Should be a very sobering
tomorrow.
Jim "Pappy" Goolsby
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Message 9
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Details:
L-39 Down At Titusville Airshow, Pilot Killed
Fri, 16 Mar '07
ANN REALTIME REPORTING 03.16.07 1600 EDT: Aero-News has learned the pilot of an
L-39 was killed Friday afternoon, when the single-engine jet crashed during a
performance at the Tico Warbird Airshow in Titusville, FL.
Officials at Space Coast Regional Airport (TIX) confirmed to Florida Today the
pilot was killed in the accident. An airshow program identified the plane's pilot
as former Israeli fighter pilot Eilon Krugman-Kaldi, although officials have
not confirmed Krugman-Kaldi was flying the Czech-made trainer at the time of
the crash.
Witnesses say the plane was performing a loop when it crashed shortly after 2:30
pm. One witness, Tom Erickson, said it appeared the pilot realized he was too
close to the ground during the maneuver, and attempted to pull out of the loop.
"I said to myself that looks too low," Erikson said. "Why was he so low to the
ground? This was a disaster."
Former Golden Knights Army parachute team member Dennis West also saw the plane
crash.
"I was watching one plane before that doing some acrobatic stuff," he said. "When
that plane was done, I saw a jet in the air and I turned to watch him. The
plane was heading south 2,000 feet off the ground, then all of a sudden it just
went straight down. I couldn't hear the impact but I saw the big black puff
of smoke."
The accident occurred minutes after the airfield had reopened, following a rain
shower. Friday is the first day of the planned three-day event
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=101107#101107
Message 10
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| Subject: | A possible suggestion |
Is there any specific operating procedure in the Pilots Manual concerning this
practice?
This is well "beyond me" and my understanding of the systems, but why has it
been a common practice to tie wire the generator switch in the closed position
on CJ's delivered by some west coasters?; with some advice that if the switch
were opened, it would result in failure of the generator? rb
"Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" <mark.bitterlich@navy.mil>
wrote:
Thanks David for sharing your experience. When I went through my own
electrical nightmare, I came close to just bagging the whole mess and
going the "American way", namely by converting to the exact same system
you have in your TW. There is no question that it is the 'cat's meow'.
Then I started to think about it and wondered if there was any
circumstance where you could blow that really beautiful but very
expensive Alternator! Hmmm, thanks for THAT education! I then decided
to sweat some more and see if I could figure out what really was wrong
with my Russian system. At least with it, the parts are cheap....
EXCEPT for that dang DNP-200A thing. So, bottom line is that any way
you look at it, you're damned if you do, and damned if you don't.
By the way, sooner or later all of our readers here are going to
experience the "DNP-200 syndrome". I am thinking about going into
business repairing them... :-)
Dennis.... Thanks for your comments as well. The way I look at it, it
can't hurt anything, and if your batteries go dead that fast, it's
better to know that sooner than later as well!
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of David McGirt
Sent: Wednesday, March 14, 2007 19:40
Subject: RE: Yak-List: A possible suggestion
Mark,
Very good points, I just finished REPLACING my regulator and alternator
in my TW - purely due to a DOS error... ( Dumbass Owner Syndrome )
My batteries we low, and instead of pulling and charging, I started up,
and let them charge off the alternator at low RPM.. thus burning up a 50
AMP Alternator and regulator... That would have worked ( although,
still not the right was to go about it.. ) if I would have waited to
after takeoff, at high RPM, thus getting the full capability of the
Alternator..
After owning up to my error to the Manufacturer, they also asked if I
was starting and shutting down with the Alternator on, and HIGHLY
recommended turn it off during these low RPM areas.. as you suggested..
I know Gen's and Alternator are not the same, but the practice should
help all..
Just my $750 worth of experience.. that is a lot of gas money wasted..
David
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich,
Mark G CIV Det Cherry Point, MALS-14 64E
Sent: Wednesday, March 14, 2007 6:03 PM
Subject: Yak-List: A possible suggestion
--> Point,
MALS-14 64E"
Lately I have become pretty deeply involved in Yak electrical issues.
One part of the Yak (and other Russian aircraft)in the overall design
seems to have a pretty significant failure rate, and also is difficult
to impossible to replace, with the current "if you can find one" price
being around $650 each. This is the DNP-200A "Combined Device" detailed
in my White Paper posted several weeks ago.
I may indeed have become "overly sensitive" to this issue and my
up-coming suggestion may indeed be over-kill. I will leave that up to
each persons individual judgment or even open debate for that matter.
That said, I personally am going to modify my operating habits a little
bit. Namely, I am going to start my engine from now on with the
generator switch in the OFF position. I am going to LEAVE if off for
all taxi operations. I am ONLY going to turn it on when performing the
pre-take-off run up, and of course I will then leave it on for the rest
of the flight.
After landing, I will turn the generator switch off immediately and
leave it off even past engine shut-down.
Why am I doing this?
Because every single time you increase engine RPM to about 40% or so,
the generator comes on right? No... Not really. The generator is on as
soon as you start the engine. The generator VOLTAGE only gets high
enough around 40% or so and then the DNP-200A contactor relay closes and
generator power is fed to the bus. Reduce engine speed back to idle,
and what happens? REVERSE current flows TO the generator and the
DNP-200A contactor OPENS (at least we hope it will) and generator power
is REMOVED from the aircraft bus and the generator LIGHT comes on.
Consider if you will how many times this happens from when you first
start until you are ready to take off.
Reducing the amount of times this happens will extend the life of the
DNP-200A Combined Assy.
Is it worth taking such a step in order to extend the life of this part?
You be the judge.
Mark Bitterlich
N50YK
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Message 11
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| Subject: | Generator switch |
My 2 cents worth.
Locking the gen switch in the off position precludes ( hopefully )
turning it on with a load such as radios, at cruise power, causing a
spike in voltage perhaps damaging equipment.
Joe
Message 12
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| Subject: | Yak-52 Rudder Lock |
Good suggestions all. Thanks a million.
Scott
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