Today's Message Index:
----------------------
1. 03:39 AM - List troll (Brian Lloyd)
2. 04:51 AM - Re: Thump/Chuff (cpayne@joimail.com)
3. 05:35 AM - Re: Re: Thump/Chuff (A. Dennis Savarese)
4. 05:53 AM - tailwheel redux (Drew Eginton)
5. 06:01 AM - Re: Re: Thump/Chuff (Ernest Martinez)
6. 06:15 AM - Re: Re: Thump/Chuff (Frank Haertlein)
7. 06:29 AM - Re: Re: Thump/Chuff (A. Dennis Savarese)
8. 06:40 AM - Re: tailwheel redux (Boyd Braem)
9. 07:11 AM - Re: Yak-List Digest: 18 Msgs - 12/05/03 (Duncan)
10. 07:16 AM - Panel Stickers (Duncan)
11. 10:37 AM - Re: Yak-List Digest: 18 Msgs - 12/05/03 (Jerry Painter)
12. 12:40 PM - Re: Re: Thump/Chuff (Brian Lloyd)
13. 12:44 PM - Chinese Material Specs?? (Jay McIntyre)
14. 12:48 PM - Re: tailwheel redux (Boyd Braem)
15. 01:21 PM - Re: Re: Thump/Chuff (Frank Haertlein)
16. 01:41 PM - Re: Re: Thump/Chuff (Greg Arnold, R.G.)
17. 02:55 PM - Re: Re: Thump/Chuff (Boyd Braem)
18. 05:18 PM - Re: Re: Thump/Chuff (Greg Arnold, R.G.)
19. 06:57 PM - Re: Re: Thump/Chuff (Rick Basiliere)
20. 08:11 PM - Re: tailwheel redux (BUTLER, FRANCIS)
21. 10:03 PM - Re: Re: Thump/Chuff (Brian Lloyd)
22. 10:03 PM - Re: Re: Thump/Chuff (Brian Lloyd)
23. 10:21 PM - Re: Chinese Material Specs?? (Walt Lannon)
Message 1
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--> Yak-List message posted by: Brian Lloyd <brian@lloyd.com>
Cy Galley wrote:
> --> Yak-List message posted by: "Cy Galley" <cgalley@qcbc.org>
>
> Hey Bozo,
>
> Scroll down and unsubscribe. You were able to subscribe so you can show
> your intelligence by unsubscribing rather than your poor taste comment which
> gets you nothing except the contempt of other readers. These other readers
> cannot unsubscribe you... You must do it.
This is the list troll who comes along periodically to get us all worked up. When
you respond to him you make his day. He is trying to get just the kind of
response above. Matt quickly identifies the source and kills the account but
the troll comes back using yet another email address and does it again.
He lives to have people yelling at him on the list so the way to ruin his day and
get him to go away is to completely ignore him. I mean *completely*. NOT
ONE WORD.
Please
please
please
do not respond to the troll.
This will be my only post on the subject.
--
Brian Lloyd 6501 Red Hook Plaza, Suite 201
brian@lloyd.com St. Thomas, VI 00802
+1.340.998.9447 - voice +1.360.838.9669 - fax
GMT-4
Message 2
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--> Yak-List message posted by: cpayne@joimail.com
Pat,
My 2 cents: Try adding a solvent such as Marvel Mystry Oil
to both the oil and the fuel. Helps with carboned and
leaded-up valves and guides as well as carb gunk. Especially
if all you ever burn is 100LL.
Craig Payne
Pat,
My 2 cents: Try adding a solvent such as Marvel Mystry Oil to both the oil
and the fuel. Helps with carboned and leaded-up valves and guides as well as
carb gunk. Especially if all you ever burn is 100LL.
Craig Payne
Message 3
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--> Yak-List message posted by: "A. Dennis Savarese" <adsavar@gte.net>
Stop being modest Craig. The info on MMO is worth at least $1.00! MMO in
the fuel does wonders for the carb. You and I know it and believe in the
stuff. As you have said on numerous occasions, "walk down the pits at the
Reno air races and take a look at how many empty gallon containers there are
of MMO". Do they know something we don't? Not any more. And as Paul
Harvey would say, "And now you know the rest of the story".
Happy holidays
Dennis
----- Original Message -----
From: <cpayne@joimail.com>
Subject: Yak-List: Re: Thump/Chuff
> --> Yak-List message posted by: cpayne@joimail.com
>
> Pat,
> My 2 cents: Try adding a solvent such as Marvel Mystry Oil
> to both the oil and the fuel. Helps with carboned and
> leaded-up valves and guides as well as carb gunk. Especially
> if all you ever burn is 100LL.
>
> Craig Payne
>
>
> Pat,
>
>
> My 2 cents: Try adding a solvent such as Marvel Mystry Oil to both the oil
> and the fuel. Helps with carboned and leaded-up valves and guides as well
as
> carb gunk. Especially if all you ever burn is 100LL.
>
>
> Craig Payne
>
>
Message 4
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--> Yak-List message posted by: Drew Eginton <deginton@marketswitch.com>
Francis:
"No one says you have to taxi with the tailwheel locked. I still don't
understand
how your giving up any control axis on the ground. The tailwheel locks, the
stick doesn't."
Stick aft creating downforce on elevator, no turning moment. Need to
turn? Stick forward, no downforce on elevator.
This is the analogue to "speed, quality, price: choose any two" which we
use in the software business. ("Lateral, vertical, longitudinal: on the
ground you get longitudinal, and one of the other two.")
Unless I'm missing something.
Dean:
"I have read your post 50 times and cannot figure out what you mean by giving
up a control axis just because your tail wheel happens to lock at some point
in your control travel. You have full 3 axis control, the stick and rudder
provide that, and they don't lock."
The elevator is neutralized with the stick neutralized, which is where it
is (on my plane) when the pin retracts from the tailwheel. Then, no
downforce available. One does *not* have simultaneous elevator derived
downforce *and* turning moment, so long as that wheel is locked. (Or, at
best, the wheel is crossed against the rudder, which means one will go
hop-hop-hop sideways until something breaks.)
Unless I'm missing something.
*****
It's very helpful to learn I can adjust its engagement point, which I will
do, I think, in lieu of rigging a separate control. Thanks, Dean.
Okay, I assume this has gotten picayune for many of you. I do enjoy flying
in most any non-icing condition; I'm not a pro, so I don't have to be
perfect over my expected 50 year flying career. (If I ever have the
misfortune of groundlooping something, it won't cost me my job.) So I fly
when I can, which is not enough given the software life, and I go places
where it's punky or windy or slick, and I like to use my feet on the ground
with the tail pinned to the ground by elevator downforce. When I bent the
prop on the Decathlon it was when I was 1000 hours into my flying life, and
complacent, and idling on the ramp with my feet on the floor and my head
and hands down looking for my cell phone which was ringing somewhere on my
person. A mysterious hand (the Hand of Avenging Pride?) lifted the tail
and neatly ground the prop into the pavement, then (just as I restored my
hands and feet to their proper places), gently set me back down. Quoting
Poe, "Nevermore." As I said, I didn't get a chance to say "Watch this"; I
just had a chance to repeat to myself, later, 500 times "I can't effing
believe this." I keep hands on throttle and stick, feet in the stirrups
and prefer to use them all. Thanks to all for the helpful comments. Dean,
I may need to call you sometime, I have a periodic hankering for an -18,
and I imagine at some point I'll go full rich stupid and want to buy one,
and use that manual-locking tailwheel control.
--drew
Message 5
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--> Yak-List message posted by: "Ernest Martinez" <ernest.martinez@oracle.com>
Its great on Salads too.
Ernie
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis
Savarese
Subject: Re: Yak-List: Re: Thump/Chuff
--> Yak-List message posted by: "A. Dennis Savarese" <adsavar@gte.net>
Stop being modest Craig. The info on MMO is worth at least $1.00! MMO
in
the fuel does wonders for the carb. You and I know it and believe in
the
stuff. As you have said on numerous occasions, "walk down the pits at
the
Reno air races and take a look at how many empty gallon containers there
are
of MMO". Do they know something we don't? Not any more. And as Paul
Harvey would say, "And now you know the rest of the story".
Happy holidays
Dennis
----- Original Message -----
From: <cpayne@joimail.com>
Subject: Yak-List: Re: Thump/Chuff
> --> Yak-List message posted by: cpayne@joimail.com
>
> Pat,
> My 2 cents: Try adding a solvent such as Marvel Mystry Oil
> to both the oil and the fuel. Helps with carboned and
> leaded-up valves and guides as well as carb gunk. Especially
> if all you ever burn is 100LL.
>
> Craig Payne
>
>
> Pat,
>
>
> My 2 cents: Try adding a solvent such as Marvel Mystry Oil to both the
oil
> and the fuel. Helps with carboned and leaded-up valves and guides as
well
as
> carb gunk. Especially if all you ever burn is 100LL.
>
>
> Craig Payne
>
>
=
==
==
==
==
Message 6
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--> Yak-List message posted by: "Frank Haertlein" <yak52driver@earthlink.net>
Dennis;
When I first timed my engine you could see normal black deposits on the
top of the piston. I've been running MMO lately. I timed my engine again
a few weeks ago and the top of the piston was clean : ) I winder what
other things are getting cleaned that you can't see?
I'm sold.
Frank
N9110M
Yak52
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis
Savarese
Subject: Re: Yak-List: Re: Thump/Chuff
--> Yak-List message posted by: "A. Dennis Savarese" <adsavar@gte.net>
Stop being modest Craig. The info on MMO is worth at least $1.00! MMO
in the fuel does wonders for the carb. You and I know it and believe in
the stuff. As you have said on numerous occasions, "walk down the pits
at the Reno air races and take a look at how many empty gallon
containers there are
of MMO". Do they know something we don't? Not any more. And as Paul
Harvey would say, "And now you know the rest of the story". Happy
holidays Dennis
----- Original Message -----
From: <cpayne@joimail.com>
Subject: Yak-List: Re: Thump/Chuff
> --> Yak-List message posted by: cpayne@joimail.com
>
> Pat,
> My 2 cents: Try adding a solvent such as Marvel Mystry Oil
> to both the oil and the fuel. Helps with carboned and leaded-up valves
> and guides as well as carb gunk. Especially if all you ever burn is
> 100LL.
>
> Craig Payne
>
>
> Pat,
>
>
> My 2 cents: Try adding a solvent such as Marvel Mystry Oil to both the
> oil and the fuel. Helps with carboned and leaded-up valves and guides
> as well
as
> carb gunk. Especially if all you ever burn is 100LL.
>
>
> Craig Payne
>
>
=
==
direct advertising on the Matronics Forums.
==
==
==
Message 7
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--> Yak-List message posted by: "A. Dennis Savarese" <adsavar@gte.net>
Yep! Sure is.
----- Original Message -----
From: "Ernest Martinez" <ernest.martinez@oracle.com>
Subject: RE: Yak-List: Re: Thump/Chuff
> --> Yak-List message posted by: "Ernest Martinez"
<ernest.martinez@oracle.com>
>
> Its great on Salads too.
>
> Ernie
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis
> Savarese
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: Thump/Chuff
>
> --> Yak-List message posted by: "A. Dennis Savarese" <adsavar@gte.net>
>
> Stop being modest Craig. The info on MMO is worth at least $1.00! MMO
> in
> the fuel does wonders for the carb. You and I know it and believe in
> the
> stuff. As you have said on numerous occasions, "walk down the pits at
> the
> Reno air races and take a look at how many empty gallon containers there
> are
> of MMO". Do they know something we don't? Not any more. And as Paul
> Harvey would say, "And now you know the rest of the story".
> Happy holidays
> Dennis
> ----- Original Message -----
> From: <cpayne@joimail.com>
> To: <yak-list@matronics.com>
> Subject: Yak-List: Re: Thump/Chuff
>
>
> > --> Yak-List message posted by: cpayne@joimail.com
> >
> > Pat,
> > My 2 cents: Try adding a solvent such as Marvel Mystry Oil
> > to both the oil and the fuel. Helps with carboned and
> > leaded-up valves and guides as well as carb gunk. Especially
> > if all you ever burn is 100LL.
> >
> > Craig Payne
> >
> >
> > Pat,
> >
> >
> > My 2 cents: Try adding a solvent such as Marvel Mystry Oil to both the
> oil
> > and the fuel. Helps with carboned and leaded-up valves and guides as
> well
> as
> > carb gunk. Especially if all you ever burn is 100LL.
> >
> >
> > Craig Payne
> >
> >
>
>
> > ==
> ==
> ==
> ==
>
>
Message 8
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| Subject: | Re: tailwheel redux |
--> Yak-List message posted by: Boyd Braem <bcbraem@comcast.net>
Oh, and they used to have a whole mess of B-18s (C-45/AT-7/AT-11) out
in Hawaii for "pilot training, short itme"--meaning for guys that
didn't get enough monthly time. You could see all the tracks in the
grass along the run-way--"taxi practice".
Boyd.
Message 9
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| Subject: | Re: Yak-List Digest: 18 Msgs - 12/05/03 |
--> Yak-List message posted by: "Duncan" <Duncan1574@hotmail.com>
FNG is also an expression used in the US military in general and the Navy
SEAL Teams speciffically.
Russ "Air Boss" Witte-Dycus
Message 10
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--> Yak-List message posted by: "Duncan" <Duncan1574@hotmail.com>
IMHO, I think you should upload them to the files section of the YPA website
so any and all can have access to them.
Russ "Air Boss" Witte-Dycus
Red Star Pilot's Association
http://yakpilots.org
"Communism: Lousy Politics-Excellent Airplanes"
Message 11
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| Subject: | RE: Yak-List Digest: 18 Msgs - 12/05/03 |
--> Yak-List message posted by: "Jerry Painter" <wild.blue@verizon.net>
Drew,
It's not just the potential for shimmy and you usually wouldn't lock for
taxi anyway, and as Richard says, you don't lose any other axis of motion.
In any case, you're trying to keep it on the ground and maximize tailwheel
tire traction so full aft elevator is what you want.
(big secret about to be revealed here) Bigger, heavier, faster aircraft have
a lot more inertia and so are generally much more stable, easier to fly and
land. But if you land sideways or start to turn on takeoff and lose
it...watch out!
The inertia of a large mass times its higher velocity squared is more
difficult to start moving (i.e., to initiate a ground loop) and much, much,
MUCH more difficult to reverse (stop an incipient ground loop) than a small
mass at a lower velocity. That's the real reason for a tailwheel lock and
the reason early aircraft (and some gliders still) used a skid (dig it in).
Keep it straight so you don't have to worry about looping, gear collapse and
all the rest that gets bent, regardless of wind.
An aerobatic airplane like a -50 has lots of control authority for keeping
straight during touchdown or takeoff in a crosswind. Controllability is not
the problem. It's the potential for the inertia related loss of control on
the ground, subsequent ground loop and gear collapse, regardless of wind.
Another thing. Landing or taking off in a crosswind is an altogether
different matter than doing same in a GUSTING crosswind. Sounds like you
know all about what can happen in a gusting wind. You're not the lone
ranger--lots of highly experienced pilots have bent props taxiing.
If you've ever seen a ground loop of even something the size of a 180, you
know how slooooowwwwly it seems to happen. You wonder "why doesn't he stop
it?" But of course, he can't stop it.
Jerry Painter
I have to say I don't understand the big shrug over this issue. I
understand why a heavy aircraft like a Mustang, designed in an era when
there were at least four and probably six runways from which to choose,
might lock the tailwheel when in the taxi or landing configuration. But
it's a fact that if one locks the tailwheel with stick full aft, the
vertical axis is forfeited; if the stick is neutralized in order to
manipulate direction, lateral axis control is forfeited. So, if one
assumes that one flies tailwheel aircraft from engine start to engine
shutdown (versus only when the wheels are up) this is problematic because
it is designed to exploit only 2 of 3 control axes at any moment. Further,
it would seem to guarantee higher sideloads on that long gear; on a
blustery day, one can pin the tailwheel or correct directionally -- but not
both at the same time ((unless one wants to try to steer while pinning an
aircraft to a runway at 100 kph by differential braking (no thanks)). All
of my tailwheel time (about 700 hours) is in a J-3 and Decathlon, which are
light and squirrelly in a good blow on the ground, and interesting to
wheel-land in a quartering blow, but the Yak is light as well. The only
incident I've ever had occurred at 3 mph on the ramp in a Decathlon in 20
mph gusting 30, and I will never take control authority for granted in a
light tailwheel plane again. I didn't even get to say "watch this" before
I ruined a prop and crank.
Anyhow, thanks for the notes and the great news that the plane has enough
rudder authority, anyhow, to land in above-book conditions.
Just trying to use my feet,
--drew
Message 12
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--> Yak-List message posted by: Brian Lloyd <brian@lloyd.com>
Frank Haertlein wrote:
> --> Yak-List message posted by: "Frank Haertlein" <yak52driver@earthlink.net>
>
> Dennis;
> When I first timed my engine you could see normal black deposits on the
> top of the piston. I've been running MMO lately. I timed my engine again
> a few weeks ago and the top of the piston was clean : ) I winder what
> other things are getting cleaned that you can't see?
And before you get too carried away patting yourself on the back, one of the symptoms
of light detonation is the loss of normal combustion deposits on the top
of the piston and in the combustion chamber.
So a spiffy-clean piston is *NOT* a good sign.
--
Brian Lloyd 6501 Red Hook Plaza, Suite 201
brian@lloyd.com St. Thomas, VI 00802
+1.340.998.9447 - voice +1.360.838.9669 - fax
GMT-4
Message 13
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| Subject: | Chinese Material Specs?? |
--> Yak-List message posted by: "Jay McIntyre" <jayatnowra@hotmail.com>
Hi Guys... a friend has a project CJ that was stored on it's belly sometime in
the past and consequently he has found extensive corrosion in the lower spar cap.
He is currently doing some research in to replacing it and it seems to be
no big drama, but what we were wondering was if anyone can shed any light on the
Chinese material specs, particularly "LY-12M" for this job
<EM>Regards, Jay</EM>
P.S. see you at Classic Fighters 2005!
<A href="http://www.classicfighters.co.nz/">www.classicfighters.co.nz
Gaming galore at <a href="http://g.msn.com/8HMBENNZ/2728??PS=">XtraMSN Gaming!
Message 14
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| Subject: | Re: tailwheel redux |
--> Yak-List message posted by: Boyd Braem <bcbraem@comcast.net>
Drew--
Don't apologize to anyone about dinging a prop. If you fly enough, it
will happen, among other things. No matter how good you are and where
you held the stick.
Boyd.
Message 15
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--> Yak-List message posted by: "Frank Haertlein" <yak52driver@earthlink.net>
Brian;
I've heard about MMO cleaning top ends from others as well. I don't
think we all had detonating engines
Frank
N9110M
Yak52
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Brian Lloyd
Subject: Re: Yak-List: Re: Thump/Chuff
--> Yak-List message posted by: Brian Lloyd <brian@lloyd.com>
Frank Haertlein wrote:
> --> Yak-List message posted by: "Frank Haertlein"
> --> <yak52driver@earthlink.net>
>
> Dennis;
> When I first timed my engine you could see normal black deposits on
> the top of the piston. I've been running MMO lately. I timed my engine
> again a few weeks ago and the top of the piston was clean : ) I winder
> what other things are getting cleaned that you can't see?
And before you get too carried away patting yourself on the back, one of
the symptoms of light detonation is the loss of normal combustion
deposits on the top of the piston and in the combustion chamber.
So a spiffy-clean piston is *NOT* a good sign.
--
Brian Lloyd 6501 Red Hook Plaza, Suite 201
brian@lloyd.com St. Thomas, VI 00802
+1.340.998.9447 - voice +1.360.838.9669 - fax
GMT-4
=
==
direct advertising on the Matronics Forums.
==
==
==
Message 16
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--> Yak-List message posted by: "Greg Arnold, R.G." <catfsh4u@bellsouth.net>
Hi all:
I'm new to the list having bought my Yak this year. I am reading everything
you'all post with great interest. Basically, my limited understanding of
fuels can be comprised in one paragraph. Hopefully I got this straight: If
you run a high octane fuel such as 100LL chances are you will eventually
build up carbon deposits on your valves and pistons. Carbon deposits on
valves can cause thumps, chuffs and all manner of hesitations, not to
mention valve seat pitting and damage. Eventually you will have to get a
valve job from the carbon build up on the piston tops. Running MMO can help
clean up these deposits. It may reduce octane. We don't know if the
Russians used hardened valves and seats, therefore we better use 100LL, or
maybe a 50/50 blend, but definitely not straight unleaded premium mogas.
Does MMO reduce the build up of helpful lead oxides? That would be a
concern..does anyone know? Is "light" detonation such a bad thing?
Shouldn't I be able to hear it if my engine was pinging? Sorry..lots of
questions from a newbie.
Greg Arnold
N624PT
----- Original Message -----
From: "Brian Lloyd" <brian@lloyd.com>
Subject: Re: Yak-List: Re: Thump/Chuff
> --> Yak-List message posted by: Brian Lloyd <brian@lloyd.com>
>
> Frank Haertlein wrote:
>
> > --> Yak-List message posted by: "Frank Haertlein"
<yak52driver@earthlink.net>
> >
> > Dennis;
> > When I first timed my engine you could see normal black deposits on the
> > top of the piston. I've been running MMO lately. I timed my engine again
> > a few weeks ago and the top of the piston was clean : ) I winder what
> > other things are getting cleaned that you can't see?
>
> And before you get too carried away patting yourself on the back, one of
the symptoms of light detonation is the loss of normal combustion deposits
on the top of the piston and in the combustion chamber.
>
> So a spiffy-clean piston is *NOT* a good sign.
>
> --
>
> Brian Lloyd 6501 Red Hook Plaza, Suite 201
> brian@lloyd.com St. Thomas, VI 00802
> +1.340.998.9447 - voice +1.360.838.9669 - fax
> GMT-4
>
>
Message 17
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--> Yak-List message posted by: Boyd Braem <bcbraem@comcast.net>
Greg--
Please get some instruction.
By all means use MMO.
No, you can't hear an airplane engine ping, knock or detonate. If you
can do the bend over and kiss your butt good-bye thing.
Boyd.
Message 18
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--> Yak-List message posted by: "Greg Arnold, R.G." <catfsh4u@bellsouth.net>
----- Original Message -----
From: "Boyd Braem" <bcbraem@comcast.net>
Subject: Re: Yak-List: Re: Thump/Chuff
> --> Yak-List message posted by: Boyd Braem <bcbraem@comcast.net>
>
> Greg--
>
> Please get some instruction.
>
Indeed. I have taken Dennis Savarese's maintenance course for the Yak 52.
An excellent course I might add. I also have some time with an instructor
who flys primarily a Zlin doing very basic stuff loops, slow rolls, cubans,
etc. Right now I'm looking for a good instructor that can provide me
additional aerobatic instruction in the Yak. Any suggestions?
> By all means use MMO.
>
> No, you can't hear an airplane engine ping, knock or detonate. If you
> can do the bend over and kiss your butt good-bye thing.
The only time I've ever heard a piston engine really bang, knock, ping or
whatever was once while flying a rental C-172 to Savannah, GA at about 5,000
feet the engine made a large clanking sound and then shuddered. I remember
falling forward on the yoke as the airplane slowed. Partial power for about
2 minutes then another large clank then silence..dead sticked the plane into
Sanford airport which fortunately was right near the large lake I happened
to be over at the time...I still remember *vividly* the tower telling me as
I landed midfield "crash trucks are rolling". I can honestly say I never
thought about bending over and kissing my butt goodbye...there was no time
to think really.. just did what I had to do to get me and my passenger down
safely ;)
gpa
=======================================================================
>
>
Message 19
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--> Yak-List message posted by: "Rick Basiliere" <discrab@earthlink.net>
Where are you and where do you desire the aerobatic instruction take place?
Respectfully, Rick
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com]On Behalf Of Greg Arnold,
R.G.
Subject: Re: Yak-List: Re: Thump/Chuff
--> Yak-List message posted by: "Greg Arnold, R.G." <catfsh4u@bellsouth.net>
----- Original Message -----
From: "Boyd Braem" <bcbraem@comcast.net>
Subject: Re: Yak-List: Re: Thump/Chuff
> --> Yak-List message posted by: Boyd Braem <bcbraem@comcast.net>
>
> Greg--
>
> Please get some instruction.
>
Indeed. I have taken Dennis Savarese's maintenance course for the Yak 52.
An excellent course I might add. I also have some time with an instructor
who flys primarily a Zlin doing very basic stuff loops, slow rolls, cubans,
etc. Right now I'm looking for a good instructor that can provide me
additional aerobatic instruction in the Yak. Any suggestions?
> By all means use MMO.
>
> No, you can't hear an airplane engine ping, knock or detonate. If you
> can do the bend over and kiss your butt good-bye thing.
The only time I've ever heard a piston engine really bang, knock, ping or
whatever was once while flying a rental C-172 to Savannah, GA at about 5,000
feet the engine made a large clanking sound and then shuddered. I remember
falling forward on the yoke as the airplane slowed. Partial power for about
2 minutes then another large clank then silence..dead sticked the plane into
Sanford airport which fortunately was right near the large lake I happened
to be over at the time...I still remember *vividly* the tower telling me as
I landed midfield "crash trucks are rolling". I can honestly say I never
thought about bending over and kissing my butt goodbye...there was no time
to think really.. just did what I had to do to get me and my passenger down
safely ;)
gpa
=======================================================================
>
>
Message 20
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--> Yak-List message posted by: "BUTLER, FRANCIS" <FRANCIS_BUTLER@butler-machinery.com>
Yes, I think your missing something.
When taxiing the 50 with proper taildragger control inputs for a given wind direction,
the tail locking mechanism does not interfere with anything. Momentarily
bumping the stick forward if need be to release the tailwheel, isn't going
to stand airplane on its nose. Are you wanting to taxi in Hurricane force winds?
I generally taxi mine with the tailwheel unlocked, in order to S turn a
bit to see ahead of me.
It sounds like you have convinced yourself you need to modify the system. Have
at it, let us know how it works out. Hell, what do I know, I bought my 50 with
zero tailwheel expirience. Its my first taildragger, and started flying it
after a few of hours in a champ.
Regards,
F.Butler
-----Original Message-----
From: Drew Eginton [mailto:deginton@marketswitch.com]
Subject: Yak-List: tailwheel redux
--> Yak-List message posted by: Drew Eginton <deginton@marketswitch.com>
Francis:
"No one says you have to taxi with the tailwheel locked. I still don't
understand
how your giving up any control axis on the ground. The tailwheel locks, the
stick doesn't."
Stick aft creating downforce on elevator, no turning moment. Need to
turn? Stick forward, no downforce on elevator.
This is the analogue to "speed, quality, price: choose any two" which we
use in the software business. ("Lateral, vertical, longitudinal: on the
ground you get longitudinal, and one of the other two.")
Unless I'm missing something.
Dean:
"I have read your post 50 times and cannot figure out what you mean by giving
up a control axis just because your tail wheel happens to lock at some point
in your control travel. You have full 3 axis control, the stick and rudder
provide that, and they don't lock."
The elevator is neutralized with the stick neutralized, which is where it
is (on my plane) when the pin retracts from the tailwheel. Then, no
downforce available. One does *not* have simultaneous elevator derived
downforce *and* turning moment, so long as that wheel is locked. (Or, at
best, the wheel is crossed against the rudder, which means one will go
hop-hop-hop sideways until something breaks.)
Unless I'm missing something.
*****
It's very helpful to learn I can adjust its engagement point, which I will
do, I think, in lieu of rigging a separate control. Thanks, Dean.
Okay, I assume this has gotten picayune for many of you. I do enjoy flying
in most any non-icing condition; I'm not a pro, so I don't have to be
perfect over my expected 50 year flying career. (If I ever have the
misfortune of groundlooping something, it won't cost me my job.) So I fly
when I can, which is not enough given the software life, and I go places
where it's punky or windy or slick, and I like to use my feet on the ground
with the tail pinned to the ground by elevator downforce. When I bent the
prop on the Decathlon it was when I was 1000 hours into my flying life, and
complacent, and idling on the ramp with my feet on the floor and my head
and hands down looking for my cell phone which was ringing somewhere on my
person. A mysterious hand (the Hand of Avenging Pride?) lifted the tail
and neatly ground the prop into the pavement, then (just as I restored my
hands and feet to their proper places), gently set me back down. Quoting
Poe, "Nevermore." As I said, I didn't get a chance to say "Watch this"; I
just had a chance to repeat to myself, later, 500 times "I can't effing
believe this." I keep hands on throttle and stick, feet in the stirrups
and prefer to use them all. Thanks to all for the helpful comments. Dean,
I may need to call you sometime, I have a periodic hankering for an -18,
and I imagine at some point I'll go full rich stupid and want to buy one,
and use that manual-locking tailwheel control.
--drew
Message 21
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--> Yak-List message posted by: Brian Lloyd <brian@lloyd.com>
Frank Haertlein wrote:
> --> Yak-List message posted by: "Frank Haertlein" <yak52driver@earthlink.net>
>
> Brian;
> I've heard about MMO cleaning top ends from others as well. I don't
> think we all had detonating engines
I am sure you are right. It couldn't possibly be detonation. What could possibly
happen? I certainly wouldn't worry about it. Heck, I wouldn't even give
it a second thought.
--
Brian Lloyd 6501 Red Hook Plaza, Suite 201
brian@lloyd.com St. Thomas, VI 00802
+1.340.998.9447 - voice +1.360.838.9669 - fax
GMT-4
Message 22
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--> Yak-List message posted by: Brian Lloyd <brian@lloyd.com>
Greg Arnold, R.G. wrote:
> --> Yak-List message posted by: "Greg Arnold, R.G." <catfsh4u@bellsouth.net>
>
> Hi all:
>
> I'm new to the list having bought my Yak this year. I am reading everything
> you'all post with great interest. Basically, my limited understanding of
> fuels can be comprised in one paragraph. Hopefully I got this straight: If
> you run a high octane fuel such as 100LL chances are you will eventually
> build up carbon deposits on your valves and pistons.
Carbon/soot deposits come from running too rich. Lead deposits come from running
100LL.
> Carbon deposits on
> valves can cause thumps, chuffs and all manner of hesitations, not to
> mention valve seat pitting and damage. Eventually you will have to get a
> valve job from the carbon build up on the piston tops. Running MMO can help
> clean up these deposits. It may reduce octane. We don't know if the
> Russians used hardened valves and seats, therefore we better use 100LL, or
> maybe a 50/50 blend, but definitely not straight unleaded premium mogas.
> Does MMO reduce the build up of helpful lead oxides? That would be a
> concern..does anyone know? Is "light" detonation such a bad thing?
Yes.
> Shouldn't I be able to hear it if my engine was pinging?
No. You cannot hear detonation (pinging) in an aircraft engine the way you can
in a car.
--
Brian Lloyd 6501 Red Hook Plaza, Suite 201
brian@lloyd.com St. Thomas, VI 00802
+1.340.998.9447 - voice +1.360.838.9669 - fax
GMT-4
Message 23
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| Subject: | Re: Chinese Material Specs?? |
--> Yak-List message posted by: "Walt Lannon" <lannon@look.ca>
Hi Jay;
For what it's worth, given that I am currently working under an alcoholic
fog, the Chinese specification for aluminium alloy LY12 heat treated to a
tensile strength of > 40 Kg/sq. mm is equivalent to AMS 2024 T3 alloy. I
have previously considered this with reference to skin replacement and
determined that 2024T3 is an acceptable alternative.
Whether this applies to the spar cap material I do not know and I have not
seen any reference in the Specifications Manual to LY12M. I don't know the
significance of the "M".
As I said -- for what it's worth!!
Good Luck;
Walt
----- Original Message -----
From: "Jay McIntyre" <jayatnowra@hotmail.com>
Subject: Yak-List: Chinese Material Specs??
> --> Yak-List message posted by: "Jay McIntyre" <jayatnowra@hotmail.com>
>
> Hi Guys... a friend has a project CJ that was stored on it's belly
sometime in the past and consequently he has found extensive corrosion in
the lower spar cap. He is currently doing some research in to replacing it
and it seems to be no big drama, but what we were wondering was if anyone
can shed any light on the Chinese material specs, particularly "LY-12M" for
this job
>
>
> <EM>Regards, Jay</EM>
> P.S. see you at Classic Fighters 2005!
> <A href="http://www.classicfighters.co.nz/">www.classicfighters.co.nz
>
> Gaming galore at <a href="http://g.msn.com/8HMBENNZ/2728??PS=">XtraMSN
Gaming!
>
>
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