Today's Message Index:
----------------------
1. 08:54 AM - Re: Oshkosh and MTW (\)
2. 09:06 AM - Re: Re: Engine RPM and propeller speed (Walter Lannon)
3. 09:42 AM - Re: Engine RPM and propeller speed (N642K)
4. 10:03 AM - Re: Oshkosh and MTW (Brian Lloyd)
5. 10:03 AM - Re: Re: Engine RPM and propeller speed (A. Dennis Savarese)
6. 12:16 PM - Re: Re: Engine RPM and propeller speed (Mark Davis)
7. 02:07 PM - Re: Re: Engine RPM and propeller speed (Brian Lloyd)
8. 02:51 PM - Re: Re: Engine RPM and propeller speed (Roger Kemp)
9. 08:21 PM - Re: Re: Engine RPM and propeller speed (Walter Lannon)
Message 1
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| Subject: | Re: Oshkosh and MTW |
Geees the way I remember it he was your wingman when I shot him down.
we changed his call sign from "Dbear" to "Dead Bear". One more turn I migh
t have gotten you too.
Pappy
-----Original Message-----
From: Brian Lloyd <brian@lloyd.com>
Sent: Tue, Aug 7, 2012 10:33 pm
Subject: Re: Yak-List: Oshkosh and MTW
On Tue, Aug 7, 2012 at 6:47 PM, " <cjpilot710@aol.com> wrote:
Dead Bear,
Pappy, is that supposed to be a hint?
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian@lloyd.com
+1.767.617.1365 (Dominica)
+1.916.877.5067 (USA)
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Message 2
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| Subject: | Re: Engine RPM and propeller speed |
Hi Dennis;
I probably am wrong but I seem to recall from the manual that the operating
T.O. RPM limit for the M14P was 2901 and the overspeed limit was 2950.
It appears that "N642K" may still not understand that the tachometer has
nothing to do with the propellor.
Cheers;
Walt
-----Original Message-----
From: A. Dennis Savarese
Sent: Tuesday, August 07, 2012 12:54 PM
Subject: Re: Yak-List: Re: Engine RPM and propeller speed
<dsavarese0812@bellsouth.net>
The V530 limits are your engine RPM limits, which according to the
manual is 2950 RPM. I prefer to use 2900 though.
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 8/7/2012 2:42 PM, N642K wrote:
>
> Thanks Dennis. Once again you come thru with the answer. I guess I need
> to look up the limits of the V530 and double check what is already
> programmed on my Horizon tach.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=380323#380323
>
>
Message 3
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| Subject: | Re: Engine RPM and propeller speed |
Thanks Walt but I get it
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=380410#380410
Message 4
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| Subject: | Re: Oshkosh and MTW |
On Wed, Aug 8, 2012 at 8:51 AM, " <cjpilot710@aol.com> wrote:
> Geees the way I remember it he was your wingman when I shot him down.
>
When was that? The only one I ever played "tactical" with was Barry.
> we changed his call sign from "Dbear" to "Dead Bear". One more turn I
> might have gotten you too.
>
Must have been someone else.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian@lloyd.com
+1.767.617.1365 (Dominica)
+1.916.877.5067 (USA)
Message 5
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| Subject: | Re: Engine RPM and propeller speed |
Hi Walt,
From the M14P maintenance manual, here are the specs pertinent to this
conversation.
Take-off rating is 2900 RPM +-1 (99%). "Given in brackets are nominal
values of the crankshaft speed of rotation in percent against the unified
tachometer (99.4 % corresponds to 2900 r/min of the crankshaft)".
I have no idea where they come up with 99.4% corresponds to 2900 r/min.
There are numerous misprints in the manual caused by translation. I'd
stick with 99%=2900 period.
1.2. SPECIFICATIONS
1.2.1. Engine
Designation................................................................................
M-14P
Cooling system
..........................................................................
Air-type
Engine starting system
.............................................................. Air-type
Engine continuous operation time:
At take-off rating
.................................................. Up to 5 min
At maximum permissible speed, of rotation .......... ...................
Up to 1 min
At other ratings ..................................
...................................... Not limited
Iverted engine operation:
Ratings ...........................................
..........................................Nominal
Continuous operation time .........................
.............................. Up to 2 min
Total time within service life
...................................................... Up to 18 %
_/Maximum permissible speed of rotation ...............
................... 2950 (101 %) r/min/_
Acceleration (pickup) from 760 r/min (idle) to take-off
rating on stationary airplane ..............
....................................... Up to 3 s
Maximum permissible crankshaft speed drop when
changing over to one-magneto operation at nominal
rating II and cruise rating I (low-pitch airscrew) ..
...................... 85 r/min (3 %)
Number and arrangement of cylinders .................
.................... 9, radial, single-row
Cylinder numbering ..................................
................................ Counter clockwise if viewed from
rear cover side, top cylinder is Ho. 1
Cylinder bore
.............................................................................
105 mm
Piston stroke:
Cylinder No. 4 ....................................
....................................... 130 mm
Cylinders Nos 3 and 5
............................................................... 130.15 mm
Cylinders Nos 2 and 6 .............................
................................. 130.23 mm
Cylinders Nos 8 and 9 .............................
................................. 130.39 mm
Cylinders Nos 1 and 7 .............................
................................. 131.25 mm
Total displacement ..................................
................................. 10.161 1
Compression ratio ...................................
................................. 6.30.1
Direction of rotation of crankshaft and airscrew shaft ...............LH
Engine dry mass ..................................... 214 kg+2%
NOTE: Engine dry mass does not include mass of the generator,
compressor, fine
filter with pipelines, engine frame ring, exhaust manifold parts,
tachometer generator.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 8/8/2012 11:04 AM, Walter Lannon wrote:
>
> Hi Dennis;
>
> I probably am wrong but I seem to recall from the manual that the
> operating T.O. RPM limit for the M14P was 2901 and the overspeed limit
> was 2950.
> It appears that "N642K" may still not understand that the tachometer
> has nothing to do with the propellor.
>
> Cheers;
> Walt
>
> -----Original Message----- From: A. Dennis Savarese
> Sent: Tuesday, August 07, 2012 12:54 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: Engine RPM and propeller speed
>
> <dsavarese0812@bellsouth.net>
>
> The V530 limits are your engine RPM limits, which according to the
> manual is 2950 RPM. I prefer to use 2900 though.
>
> A. Dennis Savarese
> 334-285-6263
> 334-546-8182 (mobile)
> www.yak-52.com
> Skype - Yakguy1
>
> On 8/7/2012 2:42 PM, N642K wrote:
>>
>> Thanks Dennis. Once again you come thru with the answer. I guess I
>> need to look up the limits of the V530 and double check what is
>> already programmed on my Horizon tach.
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=380323#380323
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
Message 6
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| Subject: | Re: Engine RPM and propeller speed |
His confusion may be from the fact that he has an M-14B with an M-14P nose
case and standard Russian paddle blade prop on it, so the engine for all
practical purposes is the same as an M-14P regarding RPM limitations.
Engine RPM is engine RPM regardless of the nose case gear ratio.
Mark Davis
N44YK (w/M-14P, but also a spare M-14B in hangar with an M-14P nose case on
it.)
----- Original Message -----
From: "Walter Lannon" <wlannon@shaw.ca>
Sent: Wednesday, August 08, 2012 10:04 AM
Subject: Re: Yak-List: Re: Engine RPM and propeller speed
>
> Hi Dennis;
>
> I probably am wrong but I seem to recall from the manual that the
> operating T.O. RPM limit for the M14P was 2901 and the overspeed limit was
> 2950.
> It appears that "N642K" may still not understand that the tachometer has
> nothing to do with the propellor.
>
> Cheers;
> Walt
>
> -----Original Message-----
> From: A. Dennis Savarese
> Sent: Tuesday, August 07, 2012 12:54 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: Engine RPM and propeller speed
>
> <dsavarese0812@bellsouth.net>
>
> The V530 limits are your engine RPM limits, which according to the
> manual is 2950 RPM. I prefer to use 2900 though.
>
> A. Dennis Savarese
> 334-285-6263
> 334-546-8182 (mobile)
> www.yak-52.com
> Skype - Yakguy1
>
> On 8/7/2012 2:42 PM, N642K wrote:
>>
>> Thanks Dennis. Once again you come thru with the answer. I guess I need
>> to look up the limits of the V530 and double check what is already
>> programmed on my Horizon tach.
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=380323#380323
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
Message 7
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| Subject: | Re: Engine RPM and propeller speed |
On Wed, Aug 8, 2012 at 12:13 PM, Mark Davis <markdavis@wbsnet.org> wrote:
>
> His confusion may be from the fact that he has an M-14B with an M-14P nose
> case and standard Russian paddle blade prop on it, so the engine for all
> practical purposes is the same as an M-14P regarding RPM limitations.
> Engine RPM is engine RPM regardless of the nose case gear ratio.
>
And any tach that uses the impulses on the p-leads is using crankshaft RPM
(probably a better name than "engine RPM") and not prop or output shaft RPM.
FWIW: p-lead pulses per crank rotation = number-of-cylinders/2
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian@lloyd.com
+1.767.617.1365 (Dominica)
+1.916.877.5067 (USA)
Message 8
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| Subject: | Re: Engine RPM and propeller speed |
And...who's on first? To really confuse... a M-14 DHPF with an M-14 P nose case?!!
Along with a few other minor but significant changes to allow for the prop
governor accessory drive.
Doc
-----Original Message-----
>From: Mark Davis <markdavis@wbsnet.org>
>Sent: Aug 8, 2012 2:13 PM
>To: yak-list@matronics.com
>Subject: Re: Yak-List: Re: Engine RPM and propeller speed
>
>
>His confusion may be from the fact that he has an M-14B with an M-14P nose
>case and standard Russian paddle blade prop on it, so the engine for all
>practical purposes is the same as an M-14P regarding RPM limitations.
>Engine RPM is engine RPM regardless of the nose case gear ratio.
>
>Mark Davis
>N44YK (w/M-14P, but also a spare M-14B in hangar with an M-14P nose case on
>it.)
>
>
>----- Original Message -----
>From: "Walter Lannon" <wlannon@shaw.ca>
>To: <yak-list@matronics.com>
>Sent: Wednesday, August 08, 2012 10:04 AM
>Subject: Re: Yak-List: Re: Engine RPM and propeller speed
>
>
>>
>> Hi Dennis;
>>
>> I probably am wrong but I seem to recall from the manual that the
>> operating T.O. RPM limit for the M14P was 2901 and the overspeed limit was
>> 2950.
>> It appears that "N642K" may still not understand that the tachometer has
>> nothing to do with the propellor.
>>
>> Cheers;
>> Walt
>>
>> -----Original Message-----
>> From: A. Dennis Savarese
>> Sent: Tuesday, August 07, 2012 12:54 PM
>> To: yak-list@matronics.com
>> Subject: Re: Yak-List: Re: Engine RPM and propeller speed
>>
>> <dsavarese0812@bellsouth.net>
>>
>> The V530 limits are your engine RPM limits, which according to the
>> manual is 2950 RPM. I prefer to use 2900 though.
>>
>> A. Dennis Savarese
>> 334-285-6263
>> 334-546-8182 (mobile)
>> www.yak-52.com
>> Skype - Yakguy1
>>
>> On 8/7/2012 2:42 PM, N642K wrote:
>>>
>>> Thanks Dennis. Once again you come thru with the answer. I guess I need
>>> to look up the limits of the V530 and double check what is already
>>> programmed on my Horizon tach.
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=380323#380323
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
Message 9
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| Subject: | Re: Engine RPM and propeller speed |
Hi Dennis;
Thanks for the info.
I agree, 2900 RPM (99%) period is a good number. I would not set up the
governor for the max. allowable of 2950 but would regard that as an
accidental overspeed limit.
Walt
-----Original Message-----
From: A. Dennis Savarese
Sent: Wednesday, August 08, 2012 10:00 AM
Subject: Re: Yak-List: Re: Engine RPM and propeller speed
<dsavarese0812@bellsouth.net>
Hi Walt,
>From the M14P maintenance manual, here are the specs pertinent to this
conversation.
Take-off rating is 2900 RPM +-1 (99%). "Given in brackets are nominal
values of the crankshaft speed of rotation in percent against the unified
tachometer (99.4 % corresponds to 2900 r/min of the crankshaft)".
I have no idea where they come up with 99.4% corresponds to 2900 r/min.
There are numerous misprints in the manual caused by translation. I'd
stick with 99%=2900 period.
1.2. SPECIFICATIONS
1.2.1. Engine
Designation................................................................................
M-14P
Cooling system
..........................................................................
Air-type
Engine starting system
.............................................................. Air-type
Engine continuous operation time:
At take-off rating
.................................................. Up to 5 min
At maximum permissible speed, of rotation .......... ...................
Up to 1 min
At other ratings ..................................
...................................... Not limited
Iverted engine operation:
Ratings ...........................................
..........................................Nominal
Continuous operation time .........................
.............................. Up to 2 min
Total time within service life
...................................................... Up to 18 %
_/Maximum permissible speed of rotation ...............
................... 2950 (101 %) r/min/_
Acceleration (pickup) from 760 r/min (idle) to take-off
rating on stationary airplane ..............
....................................... Up to 3 s
Maximum permissible crankshaft speed drop when
changing over to one-magneto operation at nominal
rating II and cruise rating I (low-pitch airscrew) ..
...................... 85 r/min (3 %)
Number and arrangement of cylinders .................
.................... 9, radial, single-row
Cylinder numbering ..................................
................................ Counter clockwise if viewed from
rear cover side, top cylinder is Ho. 1
Cylinder bore
.............................................................................
105 mm
Piston stroke:
Cylinder No. 4 ....................................
....................................... 130 mm
Cylinders Nos 3 and 5
............................................................... 130.15 mm
Cylinders Nos 2 and 6 .............................
................................. 130.23 mm
Cylinders Nos 8 and 9 .............................
................................. 130.39 mm
Cylinders Nos 1 and 7 .............................
................................. 131.25 mm
Total displacement ..................................
................................. 10.161 1
Compression ratio ...................................
................................. 6.30.1
Direction of rotation of crankshaft and airscrew shaft ...............LH
Engine dry mass ..................................... 214 kg+2%
NOTE: Engine dry mass does not include mass of the generator,
compressor, fine
filter with pipelines, engine frame ring, exhaust manifold parts,
tachometer generator.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 8/8/2012 11:04 AM, Walter Lannon wrote:
>
> Hi Dennis;
>
> I probably am wrong but I seem to recall from the manual that the
> operating T.O. RPM limit for the M14P was 2901 and the overspeed limit was
> 2950.
> It appears that "N642K" may still not understand that the tachometer has
> nothing to do with the propellor.
>
> Cheers;
> Walt
>
> -----Original Message----- From: A. Dennis Savarese
> Sent: Tuesday, August 07, 2012 12:54 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: Engine RPM and propeller speed
>
> <dsavarese0812@bellsouth.net>
>
> The V530 limits are your engine RPM limits, which according to the
> manual is 2950 RPM. I prefer to use 2900 though.
>
> A. Dennis Savarese
> 334-285-6263
> 334-546-8182 (mobile)
> www.yak-52.com
> Skype - Yakguy1
>
> On 8/7/2012 2:42 PM, N642K wrote:
>>
>> Thanks Dennis. Once again you come thru with the answer. I guess I need
>> to look up the limits of the V530 and double check what is already
>> programmed on my Horizon tach.
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=380323#380323
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
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