Today's Message Index:
----------------------
1. 08:19 AM - Re: M14P sound during flight. (Richard Goode)
2. 08:33 AM - Re: M14P sound during flight. (Mark Pennington)
3. 11:18 AM - Re: M14P sound during flight. (Bill)
4. 11:26 AM - Re: M14P sound during flight. (Mark Pennington)
5. 11:31 AM - Re: M14P sound during flight. (Bill)
6. 11:31 AM - Re: M14P sound during flight. (Anthony Spence)
7. 11:38 AM - Re: M14P sound during flight. (Mark Pennington)
8. 11:43 AM - Re: M14P sound during flight. (Anthony Spence)
Message 1
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| Subject: | M14P sound during flight. |
I would be confident that this is a propeller balancing issue =93
MT props are always well balanced during manufacture, but this is only
static balance, and once a propeller is mounted on an engine, then you
really do need to do a dynamic balance with the proper equipment
=93 which is widely available, particularly with people
maintaining helicopters. Richard.
RICHARD GOODE AEROBATICS
Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK
Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
e-mail: richard.goode@russianaeros.com
<mailto:richard.goode@russianaeros.com>
<http://www.russianaeros.com/> www.russianaeros.com
WORLD LEADERS IN SOVIET & CHINESE RADIAL AIRCRAFT ENGINES
In partnership with Aerometal Kft, Hungary.
From: owner-m14pengines-list-server@matronics.com
<owner-m14pengines-list-server@matronics.com> On Behalf Of Sylvain April
Sent: 28 September 2022 19:36
Subject: M14PEngines-List: M14P sound during flight.
Hi all,
I need your experience on the M14P. I am flying a Murphy Moose with a
M14P 400HP engine spinning a MTV9 propeller.The airplane is on amphib
floats.
The engine runs OK with all the parameters in the green. But the engine
make an unusual noise when we are in flight, it makes a kind of RAA_
RAA_ RAA with a period of about 2 seconds. At 1840 RPM it is very
noticable at 2000 RPM it is louder, this noise can also be felt as a
vibration in the floor of the airplane. The prop check OK no loose blade
or damage, it perform normally, The RPM is constant no variation seen on
an 3 1/8=99=99 analog gauge. We can not find anything loose
on the airplane, The cowling is solid, the float guide wire are tight.
Any idea what can cause this noise, it really seems to come from the
engine.
Thanks
Sylvain April
Envoy=C3=A9 =C3- partir de Courrier
<https://go.microsoft.com/fwlink/?LinkId=550986> pour Windows
Message 2
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| Subject: | Re: M14P sound during flight. |
I had a =9CHarmonic=9D on my M14P.
I purchased a prop balancer and after completing the balance the engine
runs very smoothly at any RPM above a slow idle.
Mark
N621CJ.
On Thu, Sep 29, 2022 at 11:23 AM Richard Goode <
richard.goode@russianaeros.com> wrote:
> I would be confident that this is a propeller balancing issue =93 M
T props
> are always well balanced during manufacture, but this is only static
> balance, and once a propeller is mounted on an engine, then you really do
> need to do a dynamic balance with the proper equipment =93 which is
widely
> available, particularly with people maintaining helicopters. Richard.
>
>
> *RICHARD GOODE AEROBATICS*
>
> *Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK*
>
> Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
>
> e-mail: richard.goode@russianaeros.com
>
> www.russianaeros.com
>
> *W**ORLD LEADERS IN SOVIET & CHINESE RADIAL AIRCRAFT ENGINES*
>
> *In partnership with Aerometal Kft, Hungary.*
>
>
> *From:* owner-m14pengines-list-server@matronics.com <
> owner-m14pengines-list-server@matronics.com> *On Behalf Of *Sylvain April
> *Sent:* 28 September 2022 19:36
> *To:* m14pengines-list@matronics.com
> *Subject:* M14PEngines-List: M14P sound during flight.
>
>
> Hi all,
>
>
> I need your experience on the M14P. I am flying a Murphy Moose with a M14
P
> 400HP engine spinning a MTV9 propeller.The airplane is on amphib floats.
>
>
> The engine runs OK with all the parameters in the green. But the engine
> make an unusual noise when we are in flight, it makes a kind of RAA_ RAA_
> RAA with a period of about 2 seconds. At 1840 RPM it is very noticable a
t
> 2000 RPM it is louder, this noise can also be felt as a vibration in the
> floor of the airplane. The prop check OK no loose blade or damage, it
> perform normally, The RPM is constant no variation seen on an 3 1/8
=99=99
> analog gauge. We can not find anything loose on the airplane, The cowling
> is solid, the float guide wire are tight.
>
>
> Any idea what can cause this noise, it really seems to come from the
> engine.
>
>
> Thanks
>
> Sylvain April
>
>
> Envoy=C3=A9 =C3- partir de Courrier
> <https://go.microsoft.com/fwlink/?LinkId=550986> pour Windows
>
>
--
Replied from my iPhone. Please excuse any typos in the content
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| Subject: | Re: M14P sound during flight. |
What king did you buy and where did you mount it?
> On Sep 29, 2022, at 10:36 AM, Mark Pennington <pennington.construction.inc
.1@gmail.com> wrote:
>
> =EF=BB
> I had a =9CHarmonic=9D on my M14P.
>
> I purchased a prop balancer and after completing the balance the engine ru
ns very smoothly at any RPM above a slow idle.
>
> Mark
> N621CJ.
>
>> On Thu, Sep 29, 2022 at 11:23 AM Richard Goode <richard.goode@russianaero
s.com> wrote:
>> I would be confident that this is a propeller balancing issue =93 M
T props are always well balanced during manufacture, but this is only static
balance, and once a propeller is mounted on an engine, then you really do n
eed to do a dynamic balance with the proper equipment =93 which is wid
ely available, particularly with people maintaining helicopters. Richard.
>>
>>
>>
>>
>>
>> RICHARD GOODE AEROBATICS
>>
>> Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK
>>
>> Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
>>
>> e-mail: richard.goode@russianaeros.com
>>
>> www.russianaeros.com
>>
>> WORLD LEADERS IN SOVIET & CHINESE RADIAL AIRCRAFT ENGINES
>>
>> In partnership with Aerometal Kft, Hungary.
>>
>>
>>
>> From: owner-m14pengines-list-server@matronics.com <owner-m14pengines-list
-server@matronics.com> On Behalf Of Sylvain April
>> Sent: 28 September 2022 19:36
>> To: m14pengines-list@matronics.com
>> Subject: M14PEngines-List: M14P sound during flight.
>>
>>
>>
>> Hi all,
>>
>>
>>
>> I need your experience on the M14P. I am flying a Murphy Moose with a M14
P 400HP engine spinning a MTV9 propeller.The airplane is on amphib floats.
>>
>>
>>
>> The engine runs OK with all the parameters in the green. But the engine m
ake an unusual noise when we are in flight, it makes a kind of RAA_ RAA_ RAA
with a period of about 2 seconds. At 1840 RPM it is very noticable at 2000
RPM it is louder, this noise can also be felt as a vibration in the floor o
f the airplane. The prop check OK no loose blade or damage, it perform norma
lly, The RPM is constant no variation seen on an 3 1/8=99=99 ana
log gauge. We can not find anything loose on the airplane, The cowling is so
lid, the float guide wire are tight.
>>
>>
>>
>> Any idea what can cause this noise, it really seems to come from the engi
ne.
>>
>>
>>
>> Thanks
>>
>> Sylvain April
>>
>>
>>
>>
>>
>>
>>
>> Envoy=C3=A9 =C3- partir de Courrier pour Windows
>>
>>
>>
> --
> Replied from my iPhone. Please excuse any typos in the content
Message 4
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| Subject: | Re: M14P sound during flight. |
I purchased a Dynavibe.
I have photos of the placement of the sensors.
If you go that direction. I can tell you how I did mine.
Mark
On Thu, Sep 29, 2022 at 2:21 PM Bill <wamflight@gmail.com> wrote:
> What king did you buy and where did you mount it?
>
> On Sep 29, 2022, at 10:36 AM, Mark Pennington <
> pennington.construction.inc.1@gmail.com> wrote:
>
> =EF=BB
> I had a =9CHarmonic=9D on my M14P.
>
> I purchased a prop balancer and after completing the balance the engine
> runs very smoothly at any RPM above a slow idle.
>
> Mark
> N621CJ.
>
> On Thu, Sep 29, 2022 at 11:23 AM Richard Goode <
> richard.goode@russianaeros.com> wrote:
>
>> I would be confident that this is a propeller balancing issue =93
MT props
>> are always well balanced during manufacture, but this is only static
>> balance, and once a propeller is mounted on an engine, then you really d
o
>> need to do a dynamic balance with the proper equipment =93 which i
s widely
>> available, particularly with people maintaining helicopters. Richard.
>>
>>
>>
>>
>>
>> *RICHARD GOODE AEROBATICS*
>>
>> *Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK*
>>
>> Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
>>
>> e-mail: richard.goode@russianaeros.com
>>
>> www.russianaeros.com
>>
>> *W**ORLD LEADERS IN SOVIET & CHINESE RADIAL AIRCRAFT ENGINES*
>>
>> *In partnership with Aerometal Kft, Hungary.*
>>
>>
>>
>> *From:* owner-m14pengines-list-server@matronics.com <
>> owner-m14pengines-list-server@matronics.com> *On Behalf Of *Sylvain Apri
l
>> *Sent:* 28 September 2022 19:36
>> *To:* m14pengines-list@matronics.com
>> *Subject:* M14PEngines-List: M14P sound during flight.
>>
>>
>>
>> Hi all,
>>
>>
>>
>> I need your experience on the M14P. I am flying a Murphy Moose with a
>> M14P 400HP engine spinning a MTV9 propeller.The airplane is on amphib
>> floats.
>>
>>
>>
>> The engine runs OK with all the parameters in the green. But the engine
>> make an unusual noise when we are in flight, it makes a kind of RAA_ RAA
_
>> RAA with a period of about 2 seconds. At 1840 RPM it is very noticable
at
>> 2000 RPM it is louder, this noise can also be felt as a vibration in the
>> floor of the airplane. The prop check OK no loose blade or damage, it
>> perform normally, The RPM is constant no variation seen on an 3 1/8
=99=99
>> analog gauge. We can not find anything loose on the airplane, The cowlin
g
>> is solid, the float guide wire are tight.
>>
>>
>>
>> Any idea what can cause this noise, it really seems to come from the
>> engine.
>>
>>
>>
>> Thanks
>>
>> Sylvain April
>>
>>
>>
>>
>>
>>
>>
>> Envoy=C3=A9 =C3- partir de Courrier
>> <https://go.microsoft.com/fwlink/?LinkId=550986> pour Windows
>>
>>
>>
> --
> Replied from my iPhone. Please excuse any typos in the content
>
> --
Replied from my iPhone. Please excuse any typos in the content
Message 5
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| Subject: | Re: M14P sound during flight. |
That=99s the one I=99m looking at. Send pix.
Thank u Mark.
Bill
> On Sep 29, 2022, at 1:29 PM, Mark Pennington <pennington.construction.inc.
1@gmail.com> wrote:
>
> =EF=BB
> I purchased a Dynavibe.
> I have photos of the placement of the sensors.
>
>
> If you go that direction. I can tell you how I did mine.
>
> Mark
>
>> On Thu, Sep 29, 2022 at 2:21 PM Bill <wamflight@gmail.com> wrote:
>> What king did you buy and where did you mount it?
>>
>>>> On Sep 29, 2022, at 10:36 AM, Mark Pennington <pennington.construction.
inc.1@gmail.com> wrote:
>>>>
>>> =EF=BB
>>> I had a =9CHarmonic=9D on my M14P.
>>>
>>> I purchased a prop balancer and after completing the balance the engine r
uns very smoothly at any RPM above a slow idle.
>>>
>>> Mark
>>> N621CJ.
>>>
>>>> On Thu, Sep 29, 2022 at 11:23 AM Richard Goode <richard.goode@russianae
ros.com> wrote:
>>>> I would be confident that this is a propeller balancing issue =93
MT props are always well balanced during manufacture, but this is only stat
ic balance, and once a propeller is mounted on an engine, then you really do
need to do a dynamic balance with the proper equipment =93 which is w
idely available, particularly with people maintaining helicopters. Richard.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> RICHARD GOODE AEROBATICS
>>>>
>>>> Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK
>>>>
>>>> Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
>>>>
>>>> e-mail: richard.goode@russianaeros.com
>>>>
>>>> www.russianaeros.com
>>>>
>>>> WORLD LEADERS IN SOVIET & CHINESE RADIAL AIRCRAFT ENGINES
>>>>
>>>> In partnership with Aerometal Kft, Hungary.
>>>>
>>>>
>>>>
>>>> From: owner-m14pengines-list-server@matronics.com <owner-m14pengines-li
st-server@matronics.com> On Behalf Of Sylvain April
>>>> Sent: 28 September 2022 19:36
>>>> To: m14pengines-list@matronics.com
>>>> Subject: M14PEngines-List: M14P sound during flight.
>>>>
>>>>
>>>>
>>>> Hi all,
>>>>
>>>>
>>>>
>>>> I need your experience on the M14P. I am flying a Murphy Moose with a M
14P 400HP engine spinning a MTV9 propeller.The airplane is on amphib floats.
>>>>
>>>>
>>>>
>>>> The engine runs OK with all the parameters in the green. But the engine
make an unusual noise when we are in flight, it makes a kind of RAA_ RAA_ R
AA with a period of about 2 seconds. At 1840 RPM it is very noticable at 20
00 RPM it is louder, this noise can also be felt as a vibration in the floor
of the airplane. The prop check OK no loose blade or damage, it perform nor
mally, The RPM is constant no variation seen on an 3 1/8=99=99 a
nalog gauge. We can not find anything loose on the airplane, The cowling is s
olid, the float guide wire are tight.
>>>>
>>>>
>>>>
>>>> Any idea what can cause this noise, it really seems to come from the en
gine.
>>>>
>>>>
>>>>
>>>> Thanks
>>>>
>>>> Sylvain April
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Envoy=C3=A9 =C3- partir de Courrier pour Windows
>>>>
>>>>
>>>>
>>
>>> --
>>> Replied from my iPhone. Please excuse any typos in the content
> --
> Replied from my iPhone. Please excuse any typos in the content
Message 6
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| Subject: | Re: M14P sound during flight. |
Mark
I have an MT prop on my YAK50, how and where did you mount the balance
weights?
Anthony
On Thu, Sep 29, 2022 at 14:29 Mark Pennington <
pennington.construction.inc.1@gmail.com> wrote:
> I purchased a Dynavibe.
> I have photos of the placement of the sensors.
>
>
> If you go that direction. I can tell you how I did mine.
>
> Mark
>
> On Thu, Sep 29, 2022 at 2:21 PM Bill <wamflight@gmail.com> wrote:
>
>> What king did you buy and where did you mount it?
>>
>> On Sep 29, 2022, at 10:36 AM, Mark Pennington <
>> pennington.construction.inc.1@gmail.com> wrote:
>>
>> =EF=BB
>> I had a =9CHarmonic=9D on my M14P.
>>
>> I purchased a prop balancer and after completing the balance the engine
>> runs very smoothly at any RPM above a slow idle.
>>
>> Mark
>> N621CJ.
>>
>> On Thu, Sep 29, 2022 at 11:23 AM Richard Goode <
>> richard.goode@russianaeros.com> wrote:
>>
>>> I would be confident that this is a propeller balancing issue =93
MT props
>>> are always well balanced during manufacture, but this is only static
>>> balance, and once a propeller is mounted on an engine, then you really
do
>>> need to do a dynamic balance with the proper equipment =93 which
is widely
>>> available, particularly with people maintaining helicopters. Richard.
>>>
>>>
>>>
>>>
>>>
>>> *RICHARD GOODE AEROBATICS*
>>>
>>> *Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK*
>>>
>>> Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
>>>
>>> e-mail: richard.goode@russianaeros.com
>>>
>>> www.russianaeros.com
>>>
>>> *W**ORLD LEADERS IN SOVIET & CHINESE RADIAL AIRCRAFT ENGINES*
>>>
>>> *In partnership with Aerometal Kft, Hungary.*
>>>
>>>
>>>
>>> *From:* owner-m14pengines-list-server@matronics.com <
>>> owner-m14pengines-list-server@matronics.com> *On Behalf Of *Sylvain
>>> April
>>> *Sent:* 28 September 2022 19:36
>>> *To:* m14pengines-list@matronics.com
>>> *Subject:* M14PEngines-List: M14P sound during flight.
>>>
>>>
>>>
>>> Hi all,
>>>
>>>
>>>
>>> I need your experience on the M14P. I am flying a Murphy Moose with a
>>> M14P 400HP engine spinning a MTV9 propeller.The airplane is on amphib
>>> floats.
>>>
>>>
>>>
>>> The engine runs OK with all the parameters in the green. But the engine
>>> make an unusual noise when we are in flight, it makes a kind of RAA_ RA
A_
>>> RAA with a period of about 2 seconds. At 1840 RPM it is very noticable
at
>>> 2000 RPM it is louder, this noise can also be felt as a vibration in th
e
>>> floor of the airplane. The prop check OK no loose blade or damage, it
>>> perform normally, The RPM is constant no variation seen on an 3 1/8
=99=99
>>> analog gauge. We can not find anything loose on the airplane, The cowli
ng
>>> is solid, the float guide wire are tight.
>>>
>>>
>>>
>>> Any idea what can cause this noise, it really seems to come from the
>>> engine.
>>>
>>>
>>>
>>> Thanks
>>>
>>> Sylvain April
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> Envoy=C3=A9 =C3- partir de Courrier
>>> <https://go.microsoft.com/fwlink/?LinkId=550986> pour Windows
>>>
>>>
>>>
>> --
>> Replied from my iPhone. Please excuse any typos in the content
>>
>> --
> Replied from my iPhone. Please excuse any typos in the content
>
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| Subject: | Re: M14P sound during flight. |
Anthony
I have a 20 inch spinner. The weights are bolted to the spinner backing
plate.
On Thu, Sep 29, 2022 at 2:34 PM Anthony Spence <antspence62@gmail.com>
wrote:
> Mark
> I have an MT prop on my YAK50, how and where did you mount the balance
> weights?
>
> Anthony
>
> On Thu, Sep 29, 2022 at 14:29 Mark Pennington <
> pennington.construction.inc.1@gmail.com> wrote:
>
>> I purchased a Dynavibe.
>> I have photos of the placement of the sensors.
>>
>>
>> If you go that direction. I can tell you how I did mine.
>>
>> Mark
>>
>> On Thu, Sep 29, 2022 at 2:21 PM Bill <wamflight@gmail.com> wrote:
>>
>>> What king did you buy and where did you mount it?
>>>
>>> On Sep 29, 2022, at 10:36 AM, Mark Pennington <
>>> pennington.construction.inc.1@gmail.com> wrote:
>>>
>>> =EF=BB
>>> I had a =9CHarmonic=9D on my M14P.
>>>
>>> I purchased a prop balancer and after completing the balance the engine
>>> runs very smoothly at any RPM above a slow idle.
>>>
>>> Mark
>>> N621CJ.
>>>
>>> On Thu, Sep 29, 2022 at 11:23 AM Richard Goode <
>>> richard.goode@russianaeros.com> wrote:
>>>
>>>> I would be confident that this is a propeller balancing issue
=93 MT
>>>> props are always well balanced during manufacture, but this is only st
atic
>>>> balance, and once a propeller is mounted on an engine, then you really
do
>>>> need to do a dynamic balance with the proper equipment =93 which
is widely
>>>> available, particularly with people maintaining helicopters. Richard.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> *RICHARD GOODE AEROBATICS*
>>>>
>>>> *Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK*
>>>>
>>>> Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
>>>>
>>>> e-mail: richard.goode@russianaeros.com
>>>>
>>>> www.russianaeros.com
>>>>
>>>> *W**ORLD LEADERS IN SOVIET & CHINESE RADIAL AIRCRAFT ENGINES*
>>>>
>>>> *In partnership with Aerometal Kft, Hungary.*
>>>>
>>>>
>>>>
>>>> *From:* owner-m14pengines-list-server@matronics.com <
>>>> owner-m14pengines-list-server@matronics.com> *On Behalf Of *Sylvain
>>>> April
>>>> *Sent:* 28 September 2022 19:36
>>>> *To:* m14pengines-list@matronics.com
>>>> *Subject:* M14PEngines-List: M14P sound during flight.
>>>>
>>>>
>>>>
>>>> Hi all,
>>>>
>>>>
>>>>
>>>> I need your experience on the M14P. I am flying a Murphy Moose with a
>>>> M14P 400HP engine spinning a MTV9 propeller.The airplane is on amphib
>>>> floats.
>>>>
>>>>
>>>>
>>>> The engine runs OK with all the parameters in the green. But the engin
e
>>>> make an unusual noise when we are in flight, it makes a kind of RAA_ R
AA_
>>>> RAA with a period of about 2 seconds. At 1840 RPM it is very noticabl
e at
>>>> 2000 RPM it is louder, this noise can also be felt as a vibration in t
he
>>>> floor of the airplane. The prop check OK no loose blade or damage, it
>>>> perform normally, The RPM is constant no variation seen on an 3 1/8
=99=99
>>>> analog gauge. We can not find anything loose on the airplane, The cowl
ing
>>>> is solid, the float guide wire are tight.
>>>>
>>>>
>>>>
>>>> Any idea what can cause this noise, it really seems to come from the
>>>> engine.
>>>>
>>>>
>>>>
>>>> Thanks
>>>>
>>>> Sylvain April
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Envoy=C3=A9 =C3- partir de Courrier
>>>> <https://go.microsoft.com/fwlink/?LinkId=550986> pour Windows
>>>>
>>>>
>>>>
>>> --
>>> Replied from my iPhone. Please excuse any typos in the content
>>>
>>> --
>> Replied from my iPhone. Please excuse any typos in the content
>>
> --
Replied from my iPhone. Please excuse any typos in the content
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| Subject: | Re: M14P sound during flight. |
Thanks I fighters that, just wanted to check, thanks again.
Anthony
On Thu, Sep 29, 2022 at 14:41 Mark Pennington <
pennington.construction.inc.1@gmail.com> wrote:
> Anthony
>
> I have a 20 inch spinner. The weights are bolted to the spinner backing
> plate.
>
>
> On Thu, Sep 29, 2022 at 2:34 PM Anthony Spence <antspence62@gmail.com>
> wrote:
>
>> Mark
>> I have an MT prop on my YAK50, how and where did you mount the balance
>> weights?
>>
>> Anthony
>>
>> On Thu, Sep 29, 2022 at 14:29 Mark Pennington <
>> pennington.construction.inc.1@gmail.com> wrote:
>>
>>> I purchased a Dynavibe.
>>> I have photos of the placement of the sensors.
>>>
>>>
>>> If you go that direction. I can tell you how I did mine.
>>>
>>> Mark
>>>
>>> On Thu, Sep 29, 2022 at 2:21 PM Bill <wamflight@gmail.com> wrote:
>>>
>>>> What king did you buy and where did you mount it?
>>>>
>>>> On Sep 29, 2022, at 10:36 AM, Mark Pennington <
>>>> pennington.construction.inc.1@gmail.com> wrote:
>>>>
>>>> =EF=BB
>>>> I had a =9CHarmonic=9D on my M14P.
>>>>
>>>> I purchased a prop balancer and after completing the balance the engin
e
>>>> runs very smoothly at any RPM above a slow idle.
>>>>
>>>> Mark
>>>> N621CJ.
>>>>
>>>> On Thu, Sep 29, 2022 at 11:23 AM Richard Goode <
>>>> richard.goode@russianaeros.com> wrote:
>>>>
>>>>> I would be confident that this is a propeller balancing issue
=93 MT
>>>>> props are always well balanced during manufacture, but this is only s
tatic
>>>>> balance, and once a propeller is mounted on an engine, then you reall
y do
>>>>> need to do a dynamic balance with the proper equipment =93 whic
h is widely
>>>>> available, particularly with people maintaining helicopters. Richard.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> *RICHARD GOODE AEROBATICS*
>>>>>
>>>>> *Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK*
>>>>>
>>>>> Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
>>>>>
>>>>> e-mail: richard.goode@russianaeros.com
>>>>>
>>>>> www.russianaeros.com
>>>>>
>>>>> *W**ORLD LEADERS IN SOVIET & CHINESE RADIAL AIRCRAFT ENGINES*
>>>>>
>>>>> *In partnership with Aerometal Kft, Hungary.*
>>>>>
>>>>>
>>>>>
>>>>> *From:* owner-m14pengines-list-server@matronics.com <
>>>>> owner-m14pengines-list-server@matronics.com> *On Behalf Of *Sylvain
>>>>> April
>>>>> *Sent:* 28 September 2022 19:36
>>>>> *To:* m14pengines-list@matronics.com
>>>>> *Subject:* M14PEngines-List: M14P sound during flight.
>>>>>
>>>>>
>>>>>
>>>>> Hi all,
>>>>>
>>>>>
>>>>>
>>>>> I need your experience on the M14P. I am flying a Murphy Moose with a
>>>>> M14P 400HP engine spinning a MTV9 propeller.The airplane is on amphib
>>>>> floats.
>>>>>
>>>>>
>>>>>
>>>>> The engine runs OK with all the parameters in the green. But the
>>>>> engine make an unusual noise when we are in flight, it makes a kind o
f RAA_
>>>>> RAA_ RAA with a period of about 2 seconds. At 1840 RPM it is very
>>>>> noticable at 2000 RPM it is louder, this noise can also be felt as a
>>>>> vibration in the floor of the airplane. The prop check OK no loose bl
ade or
>>>>> damage, it perform normally, The RPM is constant no variation seen on
an 3
>>>>> 1/8=99=99 analog gauge. We can not find anything loose on
the airplane, The
>>>>> cowling is solid, the float guide wire are tight.
>>>>>
>>>>>
>>>>>
>>>>> Any idea what can cause this noise, it really seems to come from the
>>>>> engine.
>>>>>
>>>>>
>>>>>
>>>>> Thanks
>>>>>
>>>>> Sylvain April
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Envoy=C3=A9 =C3- partir de Courrier
>>>>> <https://go.microsoft.com/fwlink/?LinkId=550986> pour Windows
>>>>>
>>>>>
>>>>>
>>>> --
>>>> Replied from my iPhone. Please excuse any typos in the content
>>>>
>>>> --
>>> Replied from my iPhone. Please excuse any typos in the content
>>>
>> --
> Replied from my iPhone. Please excuse any typos in the content
>
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