Today's Message Index:
----------------------
1. 06:34 AM - Dorm rooms (Russ)
2. 07:18 AM - How many blades? (Jon Boede)
3. 07:33 AM - Re: How many blades? (Hans Oortman)
4. 07:41 AM - Re: How many blades? (ronald wasson)
5. 07:53 AM - Re: How many blades? (Ernest Martinez)
6. 08:02 AM - Re: How many blades? (netmaster15@juno.com)
7. 08:39 AM - Re: How many blades? (kp)
8. 08:46 AM - Re: How many blades? (Hans Oortman)
9. 11:08 AM - YAK 52 FUEL TANK STRAPS (warren hallstrom)
10. 11:24 AM - Re: YAK 52 FUEL TANK STRAPS (doug sapp)
11. 01:03 PM - Re: YAK 52 FUEL TANK STRAPS (warren552)
12. 03:08 PM - pneumatic test item (Jon Boede)
13. 03:31 PM - SV: How many blades? (=?iso-8859-1?Q?H=E5vard_Dale?=)
14. 03:37 PM - Re: YAK 52 FUEL TANK STRAPS (A. Dennis Savarese)
15. 03:44 PM - Re: Re: YAK 52 FUEL TANK STRAPS (A. Dennis Savarese)
16. 03:53 PM - Re: How many blades? (A. Dennis Savarese)
17. 06:02 PM - Re: How many blades? (david stroud)
18. 09:10 PM - Re: How many blades? (Walter Lannon)
19. 09:38 PM - cleaning air compressor outlet (Jon Boede)
Message 1
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I have a room at the dorms that will be available starting Thursday night for any
late comers... Contact me via email so we can arrange it.
Russ
Message 2
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| Subject: | How many blades? |
How many blades does it take to ensure that you've cleared all the cylinder
s?
I've heard to pull 6, 9, and 12.
Jon
Message 3
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| Subject: | How many blades? |
12!
More will not hurt the engine but yourselves...as you know it's very tiring!
Hans
Dutch Yak Pilot
_____
Van: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] Namens Jon Boede
Verzonden: dinsdag 10 juni 2008 16:15
Aan: yak-list@matronics.com
Onderwerp: Yak-List: How many blades?
How many blades does it take to ensure that you've cleared all the
cylinders?
I've heard to pull 6, 9, and 12.
Jon
Message 4
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| Subject: | Re: How many blades? |
12 blades turns the crank around 6 times . Each piston goes up down
the bore at least twice for the complete four stroke cycle. Real
world I have never went more than four before I hit the lock.
On Jun 10, 2008, at 9:15 AM, Jon Boede wrote:
> How many blades does it take to ensure that you've cleared all the
> cylinders?
>
> I've heard to pull 6, 9, and 12.
>
> Jon
>
>
Message 5
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| Subject: | Re: How many blades? |
6 turns may encounter the lock, I have had oil come out of the pipe on
successive turns, I've always done 12 to be super sure that I've
gotten ALL the oil out of the cylinders, not just searching for a
lock.
All......my CJ is gone, I am no longer a Chang pilot, I'm now a measly
172 driver. I may still see some of you @ AYS, so long...its been fun.
Ernie
On Tue, Jun 10, 2008 at 10:39 AM, ronald wasson
<ronwasson@mindspring.com> wrote:
> 12 blades turns the crank around 6 times . Each piston goes up down the
> bore at least twice for the complete four stroke cycle. Real world I have
> never went more than four before I hit the lock.
> On Jun 10, 2008, at 9:15 AM, Jon Boede wrote:
>
> How many blades does it take to ensure that you've cleared all the
> cylinders?
>
> I've heard to pull 6, 9, and 12.
>
> Jon
>
> http://www.matronics.com/Navigator?Yak-List
> href="http://forums.matronics.com">http://forums.matronics.com
> href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
>
>
Message 6
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| Subject: | Re: How many blades? |
I believe Ron is ASSUMING you have a 2 blade prop. If you have installed
a 3 blade prop that changes things a bit.
-- ronald wasson <ronwasson@mindspring.com> wrote:
12 blades turns the crank around 6 times . Each piston goes up down the
bore at least twice for the complete four stroke cycle. Real world I h
ave never went more than four before I hit the lock.
On Jun 10, 2008, at 9:15 AM, Jon Boede wrote:How many blades does it tak
e to ensure that you've cleared all the cylinders?
I've heard to pull 6, 9, and 12.
Jon
http://www.matronics.com/Navigator?Yak-Listhref="http://forums.matroni
cs.com">http://forums.matronics.comhref="http://www.matronics.com/cont
ribution">http://www.matronics.com/contribution
========================
========================
========================
========================
========================
========================
=
Message 7
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| Subject: | Re: How many blades? |
The very real danger situation is oil trapped behind a closed inlet valve
within the inlet manifold, as the engine
fires on another cylinder and subsequently the oil is ingested in a gulp
.............. well you know the rest !
Stick to 12 and play safe.................. more in sub zero situations
would be my advice..........
----- Original Message -----
From: "Ernest Martinez" <erniel29@gmail.com>
Sent: Tuesday, June 10, 2008 3:50 PM
Subject: Re: Yak-List: How many blades?
>
> 6 turns may encounter the lock, I have had oil come out of the pipe on
Message 8
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| Subject: | How many blades? |
True.....but......crank turing around 6 times is not completely
true....don't forget the prop makes less turns than the crankshaft (1,54 if
I'm not mistaking...)...i.e. the crank makes only about 4 turns.....
Fly safe!
Hans
Dutch Yak Pilot
_____
Van: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] Namens netmaster15@juno.com
Verzonden: dinsdag 10 juni 2008 16:58
Aan: yak-list@matronics.com
Onderwerp: Re: Yak-List: How many blades?
I believe Ron is ASSUMING you have a 2 blade prop. If you have installed a 3
blade prop that changes things a bit.
-- ronald wasson <ronwasson@mindspring.com> wrote:
12 blades turns the crank around 6 times . Each piston goes up down the
bore at least twice for the complete four stroke cycle. Real world I have
never went more than four before I hit the lock.
On Jun 10, 2008, at 9:15 AM, Jon Boede wrote:
How many blades does it take to ensure that you've cleared all the
cylinders?
I've heard to pull 6, 9, and 12.
Jon
http://www.matronics.com/Navigator?Yak-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/contri
bution
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ttp://www.matronics.com/Navigator?Yak-List
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tronics.com
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www.matronics.com/contribution
===================================
Message 9
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| Subject: | YAK 52 FUEL TANK STRAPS |
Hi All,
I am currently getting both fuel tanks welded in my 52 due to leakage.
When we removed the lower wing panels the middle tank strap was missing
which added to the premature tank removal. Does anyone know of a source for two
straps that I can replace upon reinstalling the repaired tanks? Any help would
be appreciated.
Thanks
Warren Hallstrom
aviat501@yahoo.com
Message 10
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| Subject: | Re: YAK 52 FUEL TANK STRAPS |
Warren,
I would have a set out of a CJ6, but have no experience about
interchangability.
Check it out if you have a CJ near by. Your step should ship today.
On Tue, Jun 10, 2008 at 11:05 AM, warren hallstrom <aviat501@yahoo.com>
wrote:
> Hi All,
> I am currently getting both fuel tanks welded in my 52 due to
> leakage. When we removed the lower wing panels the middle tank strap was
> missing which added to the premature tank removal. Does anyone know of a
> source for two straps that I can replace upon reinstalling the repaired
> tanks? Any help would be appreciated.
>
> Thanks
>
> Warren Hallstrom
> aviat501@yahoo.com
>
> *
>
> *
>
>
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
Message 11
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| Subject: | Re: YAK 52 FUEL TANK STRAPS |
Hi Doug,
maybe someone on the YAK list has experience with the CJ straps in
regard to modifying them to work in the YAK.
Thanks
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=187214#187214
Message 12
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| Subject: | pneumatic test item |
As annoyed as I've gotten lately with pneumatic issues, I'd be willing to p
ay someone (a rare thing for me to say!) for the following:
1. Adapter that goes from 1/4" NPT to the 17mm nut and flare. Might be fro
m 1/4" NPT to the nipple and then a short double-female additional piece.
2. 17mm nut and flare "cap"... so that I can cap a nipple and stop air from
coming out.
I want to be able to test things like the QSF-2A valves and air pressure ga
uge before removing them from the airplane. Once #1 is out to 1/4" NPT it
will be easy to get a long braided-steel line to and adapter to put it on a
n air/nitrogen high pressure source.
If you've got something you can sell, or you can make it, please email me!
Jon
Message 13
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| Subject: | How many blades? |
Hi,
I always does 24 turns, first 6 very slow to let possible oil in
cylinders a
chance to sip out. And the first 12 with a light hand, after 12 turns I
prime 5 times and let the prime fuel help us flush away the last oil.
Then I
do the rest of our pre flight. Just before entering the cockpit I prime
new
5 and another 6 turns light handed DO NOT USE FORCE. I jump into cockpit
and
strap my self in and let the primed fuel get between 2-4 min rest, then
prime 1 for each 10 Celsius below 100 celsius EGT. Pump fuel pressure
and
hit the start button. With this procedure I have had no miss starts and
the
engine has not taken any damage. But remember that overpriming can cause
hyd
lock as well, so it is important to wait the 2-4 min and let the fuel
wapour.
Best Regards
Havard Dale
www.yaknorway.com <http://www.yaknorway.com/>
_____
Fra: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] P=E5 vegne av Hans Oortman
Sendt: 10. juni 2008 17:43
Til: yak-list@matronics.com
Emne: RE: Yak-List: How many blades?
True.....but......crank turing around 6 times is not completely
true....don't forget the prop makes less turns than the crankshaft (1,54
if
I'm not mistaking...)...i.e. the crank makes only about 4 turns.....
Fly safe!
Hans
Dutch Yak Pilot
_____
Van: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] Namens netmaster15@juno.com
Verzonden: dinsdag 10 juni 2008 16:58
Aan: yak-list@matronics.com
Onderwerp: Re: Yak-List: How many blades?
I believe Ron is ASSUMING you have a 2 blade prop. If you have installed
a 3
blade prop that changes things a bit.
-- ronald wasson <ronwasson@mindspring.com> wrote:
12 blades turns the crank around 6 times . Each piston goes up down the
bore at least twice for the complete four stroke cycle. Real world I
have
never went more than four before I hit the lock.
On Jun 10, 2008, at 9:15 AM, Jon Boede wrote:
How many blades does it take to ensure that you've cleared all the
cylinders?
I've heard to pull 6, 9, and 12.
Jon
http://www.matronics.com/Navigator?Yak-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
ontri
bution
ttp://www.matronics.com/Navigator?Yak-List
tronics.com
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href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics
.com/
Navigator?Yak-List
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href="http://www.matronics.com/contribution">http://www.matronics.com/c
Message 14
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| Subject: | Re: YAK 52 FUEL TANK STRAPS |
Virtually all Yak 52's have only 2 straps holding the fuel tanks, even
though there are 3 braces on the top side of tanks. Many of the cracks
that develop in the fuel tanks are caused by the expansion/contraction
of the metal tanks during hot weather causing the tanks to expand
because the vent system in pre-1989 Yak 52's is very poorly designed.
Have you ever opened the fuel caps during hot weather and heard the
"whoosh"? With a vent system like the post 1989 Yak 52's have on them
(two vent tubes under the belly of the airplane behind the nose wheel
indentation instead of one), the problem of expansion and contraction
disappears. Welding will fix the existing cracks, but it may happen
again (cracking).
You may want to consider replacing the metal 60 liter fuel tanks with
our custom made fuel bladders which are designed specifically to fit
into the entire fuel cavity. This will give you a true 87 liters per
side. Or approximately 46 US gallons total. Another hour of gas. They
are an easy 2-day installation. If you are interested, please contact
me off-line at dsavarese0812@bellsouth.net, or call me at 334-285-2141,
central time in the US.
Dennis Savarese
----- Original Message -----
From: warren hallstrom
To: yak-list@matronics.com
Sent: Tuesday, June 10, 2008 1:05 PM
Subject: Yak-List: YAK 52 FUEL TANK STRAPS
Hi All,
I am currently getting both fuel tanks welded in my 52 due
to leakage. When we removed the lower wing panels the middle tank strap
was missing which added to the premature tank removal. Does anyone know
of a source for two straps that I can replace upon reinstalling the
repaired tanks? Any help would be appreciated.
Thanks
Warren Hallstrom
aviat501@yahoo.com
Message 15
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| Subject: | Re: YAK 52 FUEL TANK STRAPS |
The CJ straps will not fit.
Dennis
----- Original Message -----
From: "warren552" <aviat501@yahoo.com>
Sent: Tuesday, June 10, 2008 3:01 PM
Subject: Yak-List: Re: YAK 52 FUEL TANK STRAPS
>
> Hi Doug,
> maybe someone on the YAK list has experience with the CJ
> straps in regard to modifying them to work in the YAK.
>
> Thanks
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=187214#187214
>
>
>
Message 16
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| Subject: | Re: How many blades? |
12 blades with the 2 blade prop. 18 blades on the 3 blade prop. The
gear ratio on the M14P is .658 to 1 (prop to crank).
Dennis
----- Original Message -----
From: H=E5vard Dale
To: yak-list@matronics.com
Sent: Tuesday, June 10, 2008 5:28 PM
Subject: SV: Yak-List: How many blades?
Hi,
I always does 24 turns, first 6 very slow to let possible oil in
cylinders a chance to sip out. And the first 12 with a light hand, after
12 turns I prime 5 times and let the prime fuel help us flush away the
last oil. Then I do the rest of our pre flight. Just before entering the
cockpit I prime new 5 and another 6 turns light handed DO NOT USE FORCE.
I jump into cockpit and strap my self in and let the primed fuel get
between 2-4 min rest, then prime 1 for each 10 Celsius below 100
celsius EGT. Pump fuel pressure and hit the start button. With this
procedure I have had no miss starts and the engine has not taken any
damage. But remember that overpriming can cause hyd lock as well, so it
is important to wait the 2-4 min and let the fuel wapour.
Best Regards
Havard Dale
www.yaknorway.com
-------------------------------------------------------------------------
-----
Fra: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] P=E5 vegne av Hans Oortman
Sendt: 10. juni 2008 17:43
Til: yak-list@matronics.com
Emne: RE: Yak-List: How many blades?
True.....but......crank turing around 6 times is not completely
true....don't forget the prop makes less turns than the crankshaft (1,54
if I'm not mistaking...)...i.e. the crank makes only about 4 turns.....
Fly safe!
Hans
Dutch Yak Pilot
-------------------------------------------------------------------------
-----
Van: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] Namens netmaster15@juno.com
Verzonden: dinsdag 10 juni 2008 16:58
Aan: yak-list@matronics.com
Onderwerp: Re: Yak-List: How many blades?
I believe Ron is ASSUMING you have a 2 blade prop. If you have
installed a 3 blade prop that changes things a bit.
-- ronald wasson <ronwasson@mindspring.com> wrote:
12 blades turns the crank around 6 times . Each piston goes up down
the bore at least twice for the complete four stroke cycle. Real world
I have never went more than four before I hit the lock.
On Jun 10, 2008, at 9:15 AM, Jon Boede wrote:
How many blades does it take to ensure that you've cleared all the
cylinders?
I've heard to pull 6, 9, and 12.
Jon
http://www.matronics.com/Navigator?Yak-Listhref="http://forums.matronic
s.com">http://forums.matronics.comhref="http://www.matronics.com/contri
bution">http://www.matronics.com/contribution
ttp://www.matronics.com/Navigator?Yak-Listtronics.comwww.matronics.com/co
ntribution
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics
.com/Navigator?Yak-Listhref="http://forums.matronics.com">http://forums
.matronics.comhref="http://www.matronics.com/contribution">http://www.m
atronics.com/c http://www.matronics.com/contribution
Message 17
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| Subject: | Re: How many blades? |
Hello Havard. I need to understand more about basic starting and running
of my Huosai
engine in my Fairchild project. Just to be clear, when you say prime 1
for each 10 celsius below
100 Celsius EGT did you mean to say OAT ? Thanks.
David Stroud Ottawa, Canada
C-FDWS Christavia
Fairchild 51 under construction CF-YXV
----- Original Message -----
From: H=E5vard Dale
To: yak-list@matronics.com
Sent: Tuesday, June 10, 2008 6:28 PM
Subject: SV: Yak-List: How many blades?
Hi,
I always does 24 turns, first 6 very slow to let possible oil in
cylinders a chance to sip out. And the first 12 with a light hand, after
12 turns I prime 5 times and let the prime fuel help us flush away the
last oil. Then I do the rest of our pre flight. Just before entering the
cockpit I prime new 5 and another 6 turns light handed DO NOT USE FORCE.
I jump into cockpit and strap my self in and let the primed fuel get
between 2-4 min rest, then prime 1 for each 10 Celsius below 100
celsius EGT. Pump fuel pressure and hit the start button. With this
procedure I have had no miss starts and the engine has not taken any
damage. But remember that overpriming can cause hyd lock as well, so it
is important to wait the 2-4 min and let the fuel wapour.
Best Regards
Havard Dale
www.yaknorway.com
-------------------------------------------------------------------------
-----
Fra: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] P=E5 vegne av Hans Oortman
Sendt: 10. juni 2008 17:43
Til: yak-list@matronics.com
Emne: RE: Yak-List: How many blades?
True.....but......crank turing around 6 times is not completely
true....don't forget the prop makes less turns than the crankshaft (1,54
if I'm not mistaking...)...i.e. the crank makes only about 4 turns.....
Fly safe!
Hans
Dutch Yak Pilot
-------------------------------------------------------------------------
-----
Van: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] Namens netmaster15@juno.com
Verzonden: dinsdag 10 juni 2008 16:58
Aan: yak-list@matronics.com
Onderwerp: Re: Yak-List: How many blades?
I believe Ron is ASSUMING you have a 2 blade prop. If you have
installed a 3 blade prop that changes things a bit.
-- ronald wasson <ronwasson@mindspring.com> wrote:
12 blades turns the crank around 6 times . Each piston goes up down
the bore at least twice for the complete four stroke cycle. Real world
I have never went more than four before I hit the lock.
On Jun 10, 2008, at 9:15 AM, Jon Boede wrote:
How many blades does it take to ensure that you've cleared all the
cylinders?
I've heard to pull 6, 9, and 12.
Jon
http://www.matronics.com/Navigator?Yak-Listhref="http://forums.matronic
s.com">http://forums.matronics.comhref="http://www.matronics.com/contri
bution">http://www.matronics.com/contribution
ttp://www.matronics.com/Navigator?Yak-Listtronics.comwww.matronics.com/co
ntribution
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics
.com/Navigator?Yak-Listhref="http://forums.matronics.com">http://forums
.matronics.comhref="http://www.matronics.com/contribution">http://www.m
atronics.com/c http://www.matronics.com/contribution
-------------------------------------------------------------------------
-----
Checked by AVG.
6/10/08 7:22 AM
Message 18
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| Subject: | Re: How many blades? |
How many blades?
Since any 4 stroke cycle engine cylinder requires 720 Deg. of crankshaft rotation
to complete a cycle then the basic MINIMUM requirement is two revolutions of
the crankshaft. This applies whether there is one cylinder or nine.
The nine cyl. radial has an 80 deg. cycle interval (720/9). In two revolutions
of the crank all cylinders
have completed a cycle. Two complete cycles are recommended to clear the cylinders.
Therefore with a direct drive engine the theoretical minimum is 8 blades
for a two blade and 12 for a three blade. The actual minimum recommended is 9
blades for a two blade prop.
For the Huosai engine with a gear ratio of 0.787 the requirement for prop rotation
would be 720 X 0.787 = 566.6 degs or 1.57 turns per cycle. Two complete
cycles would take 3.15 revolutions or 7 blades (for a two blade)
For the M14P it would be 720 X 0.658 = 474 degs. or 1.32 turns per cycle. Two cycles
would need 2.63 revolutions or 6 blades (for a two blade) or 9 for a
three blade.
More won't hurt but is really not necessary.
What is necessary is that the prop be turned VERY SLOWLY so that at the first sign
of oil from the exhaust turning is stopped (and maybe slightly backed up)
so that cylinder can be completely drained before continuing.
Cheers;
Walt
----- Original Message -----
From: Jon Boede
To: yak-list@matronics.com
Sent: Tuesday, June 10, 2008 7:15 AM
Subject: Yak-List: How many blades?
How many blades does it take to ensure that you've cleared all the cylinders?
I've heard to pull 6, 9, and 12.
Jon
Message 19
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| Subject: | cleaning air compressor outlet |
Anybody have step-by-step directions for cleaning the outlet on the air com
pressor?
Jon
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