Today's Message Index:
----------------------
1. 08:27 AM - Re: Re: propeller pull through procedure (Mark Davis)
2. 09:46 AM - Re: Re: propeller pull through procedure (Walter Lannon)
3. 09:52 AM - Re: Re: propeller pull through procedure (gjhagstrom@aol.com)
4. 10:10 AM - Re: Re: propeller pull through procedure (Dr. Robert Schroeder)
5. 10:21 AM - Re: Re: propeller pull through procedure (jblake207@comcast.net)
6. 10:41 AM - Re: Re: propeller pull through procedure (DaBear)
7. 05:24 PM - Yak 50 question (Todd McCutchan)
Message 1
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| Subject: | Re: propeller pull through procedure |
Pappy,
I think the MMO was used for the reddish tint in the Cubi Special
served at the Cubi O'Club. It was hard to detect over the cheap rum.
Mark
----- Original Message -----
From: cjpilot710@aol.com
To: yak-list@matronics.com
Sent: Wednesday, February 19, 2014 8:09 PM
Subject: Re: Yak-List: Re: propeller pull through procedure
So where does MMO come into to this?
Jim "Pappy" Goolsby
In a message dated 2/19/2014 7:05:25 P.M. Eastern Standard Time,
markdavis@wbsnet.org writes:
Jon,
I got multiple all expense paid trips to Subic Bay on Carl
Vinson to have the opportunity to cross the Shit River into the paradise
known as Olongapo......
Mark
----- Original Message -----
From: jblake207@comcast.net
To: yak-list@matronics.com
Sent: Wednesday, February 19, 2014 3:34 PM
Subject: Re: Yak-List: Re: propeller pull through procedure
Hey Mark, Was she? Over 18 that is...
Jon Blake
jblake207@comcast.net
-------------------------------------------------------------------------
-
From: "Mark Davis" <markdavis@wbsnet.org>
To: yak-list@matronics.com
Sent: Wednesday, February 19, 2014 4:29:35 PM
Subject: Re: Yak-List: Re: propeller pull through procedure
<markdavis@wbsnet.org>
All of this math is causing a major helmet fire! Reminds me of an
instructor I had in Schools Command in the Navy who had a useful
equation
for the young Student Naval Aviators and Student Naval Flight
Officers
before they went out on liberty in Pensacola. It went like this:
B4I4Q RU/18?
First person to solve the equation may be eligible to win a free
trip across
the Shit River in Olongapo, R.P.
Mark Davis
N44YK
P.S. I pull twelve blades on my M-14P to hopefully have cleared
the
cylinders twice.
----- Original Message -----
From: "Gill Gutierrez" <gill.g@gpimail.com>
To: <yak-list@matronics.com>
Sent: Wednesday, February 19, 2014 2:20 PM
Subject: RE: Yak-List: Re: propeller pull through procedure
<gill.g@gpimail.com>
>
> This backwards - 720 degrees prop rotation equals 1094 degrees
engine
> rotation
>
> Gill
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of
LawnDart
> Sent: Wednesday, February 19, 2014 2:12 PM
> To: yak-list@matronics.com
> Subject: Yak-List: Re: propeller pull through procedure
>
>
> 1 crankshaft rotation = 360 deg.
> 1 thermodynamic cycle (4-stroke) = 720 deg of crankshaft
rotation.
>
> M14P prop reduction = 0.658 (prop turns less than crankshaft).
> 720 / 0.658 = 1094 deg of prop rotation to complete 1
thermodynamic
> 4-stroke
> cycle.
> 1094 / 180 deg = 6.1 blades (turning one blade of a 2-bladed
prop = 180
> deg
> of prop rotation).
>
> Notes:
> a) substitute 0.xxx for 0.658 if your prop reduction is
different.
> b) for a 3-bladed prop, substitute 120 deg for 180 deg.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=419017#419017
>
>
>
>
>
>
>
>
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Message 2
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| Subject: | Re: propeller pull through procedure |
There seems to be a number of different methods for determining number
of rotations to complete a full cycle. Mostly wrong.
The key is the Otto cycle itself. It needs two revolutions to complete
and has a number of events taking place at very specific points in the
cycle. If you stack a number of these cylinders together whether in a
line or circle or whatever it becomes clear that there must be a
specific interval for those events between cylinders.
The design itself indicates that interval is 180 degs.
To fully cycle 9 cylinders then requires a crankshaft rotation of 1620
degs. (9X180). 1620/360 = 4.5 revolutions for a direct drive engine.
For the M14P: 4.5 X 0.658 X 2 (blades) = 5.922 turns OR 1620 X
0.658 = 1065.96 X 2 = 2132.92/360 = 5.922 turns.
For the HS6A the gear ratio is 0.787. The above is for two blades.
I hate three blades causes there is always one in the way to hit my head
on.
Walt
From: Todd McCutchan
Sent: Wednesday, February 19, 2014 10:59 PM
Subject: Re: Yak-List: Re: propeller pull through procedure
So I get 9.12 blades for complete rotation (1094/120) which means 10
blades to clear all yes?
Todd McCutchan
T-34A & Yak-50
Cell: (260) 402-1740
E-mail: todd@fastaircraft.com
www.fastaircraft.com
On Feb 19, 2014, at 2:12 PM, "LawnDart" <propwash@gmail.com> wrote:
1 crankshaft rotation = 360 deg.
1 thermodynamic cycle (4-stroke) = 720 deg of crankshaft rotation.
M14P prop reduction = 0.658 (prop turns less than crankshaft).
720 / 0.658 = 1094 deg of prop rotation to complete 1 thermodynamic
4-stroke cycle.
1094 / 180 deg = 6.1 blades (turning one blade of a 2-bladed prop
= 180 deg of prop rotation).
Notes:
a) substitute 0.xxx for 0.658 if your prop reduction is different.
b) for a 3-bladed prop, substitute 120 deg for 180 deg.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=419017#419017
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| Subject: | Re: propeller pull through procedure |
I thought it was handed out at the Eastend Club ??
Gary
VF-51 , " Coral Sea" '72- '76
-----Original Message-----
From: Mark Davis <markdavis@wbsnet.org>
Sent: Thu, Feb 20, 2014 9:42 am
Subject: Re: Yak-List: Re: propeller pull through procedure
Pappy,
I think the MMO was used for the reddish tint in the Cubi Special serv
ed at the Cubi O'Club. It was hard to detect over the cheap rum.
Mark
----- Original Message -----
From: cjpilot710@aol.com
Sent: Wednesday, February 19, 2014 8:09 PM
Subject: Re: Yak-List: Re: propeller pull through procedure
So where does MMO come into to this?
Jim "Pappy" Goolsby
In a message dated 2/19/2014 7:05:25 P.M. Eastern Standard Time, markdavis@
wbsnet.org writes:
Jon,
I got multiple all expense paid trips to Subic Bay on Carl Vinson
to have the opportunity to cross the Shit River into the paradise known
as Olongapo......
Mark
----- Original Message -----
From: jblake207@comcast.net
Sent: Wednesday, February 19, 2014 3:34 PM
Subject: Re: Yak-List: Re: propeller pull through procedure
Hey Mark, Was she? Over 18 that is...
Jon Blake
jblake207@comcast.net
From: "Mark Davis" <markdavis@wbsnet.org>
Sent: Wednesday, February 19, 2014 4:29:35 PM
Subject: Re: Yak-List: Re: propeller pull through procedure
--> Yak-List message posted by: "Mark Davis" <markdavis@wbsnet.org>
All of this math is causing a major helmet fire! Reminds me of an
instructor I had in Schools Command in the Navy who had a useful equa
tion
for the young Student Naval Aviators and Student Naval Flight Officer
s
before they went out on liberty in Pensacola. It went like this:
B4I4Q RU/18?
First person to solve the equation may be eligible to win a free trip
across
the Shit River in Olongapo, R.P.
Mark Davis
N44YK
P.S. I pull twelve blades on my M-14P to hopefully have cleared the
cylinders twice.
----- Original Message -----
From: "Gill Gutierrez" <gill.g@gpimail.com>
Sent: Wednesday, February 19, 2014 2:20 PM
Subject: RE: Yak-List: Re: propeller pull through procedure
> --> Yak-List message posted by: "Gill Gutierrez" <gill.g@gpimail.co
m>
>
> This backwards - 720 degrees prop rotation equals 1094 degrees
engine
> rotation
>
> Gill
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of LawnDart
> Sent: Wednesday, February 19, 2014 2:12 PM
> To: yak-list@matronics.com
> Subject: Yak-List: Re: propeller pull through procedure
>
>
> 1 crankshaft rotation = 360 deg.
> 1 thermodynamic cycle (4-stroke) = 720 deg of crankshaft rotation
.
>
> M14P prop reduction = 0.658 (prop turns less than crankshaft).
> 720 / 0.658 = 1094 deg of prop rotation to complete 1 thermodynam
ic
> 4-stroke
> cycle.
> 1094 / 180 deg = 6.1 blades (turning one blade of a 2-bladed prop
= 180
> deg
> of prop rotation).
>
> Notes:
> a) substitute 0.xxx for 0.658 if your prop reduction is different.
> b) for a 3-bladed prop, substitute 120 deg for 180 deg.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=419017#419017
>
>
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| Subject: | Re: propeller pull through procedure |
The mere mention of "Otto" causes me to return to those troubling sleepless
college years and invokes these images:
Thanks Walt.I hope you too will have the "I've got a final tomorrow on a
subject for which I've yet to get the books and go to the lecture" dreams
tonight.I know I will be having.
Oh yeah.then there's these 'laws".Damn you Newton!
Back to my lowest energy state.just corroding away here in the Bahamas.
ras
Message 5
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| Subject: | Re: propeller pull through procedure |
Message 6
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| Subject: | Re: propeller pull through procedure |
Same as the number of licks in a tootsie Pop. 2
That=99s all you need.
Bear
From: owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com>
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Todd McCutchan
Sent: Wednesday, February 19, 2014 2:48 PM
Subject: Re: Yak-List: Re: propeller pull through procedure
Ok. So how many blades for 2 blade & 3 blade to get all 9 cyl for those
of us that are math challenged?
Todd McCutchan
T-34A & Yak-50
Cell: (260) 402-1740
E-mail: todd@fastaircraft.com <mailto:todd@fastaircraft.com>
www.fastaircraft.com <http://www.fastaircraft.com>
On Feb 19, 2014, at 1:20 PM, "Gill Gutierrez" <gill.g@gpimail.com
<mailto:gill.g@gpimail.com> > wrote:
<mailto:gill.g@gpimail.com> >
This backwards - 720 degrees prop rotation equals 1094 degrees engine
rotation
Gill
-----Original Message-----
From: owner-yak-list-server@matronics.com
<mailto:owner-yak-list-server@matronics.com>
[mailto:owner-yak-list-server@matronics.com] On Behalf Of LawnDart
Sent: Wednesday, February 19, 2014 2:12 PM
Subject: Yak-List: Re: propeller pull through procedure
<mailto:propwash@gmail.com> >
1 crankshaft rotation = 360 deg.
1 thermodynamic cycle (4-stroke) = 720 deg of crankshaft rotation.
M14P prop reduction = 0.658 (prop turns less than crankshaft).
720 / 0.658 = 1094 deg of prop rotation to complete 1 thermodynamic
4-stroke
cycle.
1094 / 180 deg = 6.1 blades (turning one blade of a 2-bladed prop =
180 deg
of prop rotation).
Notes:
a) substitute 0.xxx for 0.658 if your prop reduction is different.
b) for a 3-bladed prop, substitute 120 deg for 180 deg.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=419017#419017
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Couple of Yak 50 mx questions:
1 - Does anyone know of the best way to get the gear retraction cylinders
out of the wings?
2 - What is the preferred covering for the control surfaces?
Thanks!
Todd McCutchan
Fast Aircraft
T-34A & Yak-50
Cell - 260.402.1740
Email: todd@fastaircraft.com
Skype: tmccutchan
Web: www.fastaircraft.com <http://www.fastaircraft.com/> &
www.toddmccutchanairshows.com <http://www.toddmccutchanairshows.com/>
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