Today's Message Index:
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1. 07:22 AM - Re: M14P hot cylinders (Richard Goode)
2. 10:26 AM - Re: M14P hot cylinders (Anthony Savarese)
Message 1
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| Subject: | M14P hot cylinders |
Hello Dennis,
One small point =93 was this sent to Matronics in the first place?
Certainly I did not receive it!
Then I would make the point that these temperatures are high =93
remember that maximum continuous cylinder temperature is 220=C2=B0C, and
up to 240=C2=B0C for short periods.
Then I would also say that the system of measurement is not that
accurate, in my opinion, and the presence of very small amounts of dirt
between cylinder head; sending washer and sparking plug can easily
distort the figures.
And I think another issue is that the Murphy Moose is a big aeroplane
and with a standard M 14 P it does need to work pretty hard to climb in
high ambient temperatures.
Best wishes
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 RUSSIAN SPORTING AIRCRAFT & ENGINES
In partnership with Aerometal Kft, Hungary.
From: owner-m14pengines-list-server@matronics.com
<owner-m14pengines-list-server@matronics.com> On Behalf Of Anthony
Savarese
Sent: 25 September 2021 21:55
Subject: Re: M14PEngines-List: M14P hot cylinders
As a second test and disregarding the MGL instrument, immediately, and
I mean immediately upon shutdown, using a laser temperature sensor point
the laser at the exact same point on each cylinder and read the temps. I
suggest at the flat surface around the base of each spark plug just
outside the spark plug insert. Make note of the temps on each cylinder
and compare them to the differences between the cylinder temps
you=99re seeing from the MGL.
DENNIS
Sent from my iPhone
On Sep 25, 2021, at 1:56 PM, Sylvain April <sapril001@hotmail.com
<mailto:sapril001@hotmail.com> > wrote:
=EF=BB
Hi,
I have been helping a friend with a high temperature of the cylinder
heads on his M14P engine,
The engine is installed in a Murphy Moose and the upper cylinders are
geting hoter than the lower cylinders.
25 to 30 Deg C. Hoter than the lower cylinders.
The bafling is tight and there is no obstruction behind the cylinder
heads to the passage of cooling air.
We have added ample cheeks to the cowling and we have re centered the
front of the cowling that was a little low and was providing a larger
opening below the prop spinner than above it. It did improve the cooling
of the upper cylinders but we still have a big difference between the
upper cylinder heads and the lower cylinders head.
Here are the reading from the MGL instrument that we bench checked with
boiling water.
#1 :224 C
#2 :217 C
#3 :208 C
#4 :196 C
#5 :193 C
#6 :195 C
#7 :201 C
#8 :205 C
#9 :201C
On a warmer day after climbing.
#1 :242C
#2 :241C
#3 :234C
#4 :217C
#5 :216C
#6 :215C
#7 :221C
#8 :230C
#9 :223C
The oil temperature stay at 150 to 155 Deg F and the o=C3=AFl pressure
is staying 75 to 80 PSI.
>From another Moose I used to fly the o=C3=AFl temperature reach 185 Deg
F to 195 F. And the o=C3=AFl pressure stay around 65 PSI.
The upper cylinders where also warmer in that Moose but not as much
difference with the lower cylinders.
When I look at the cold oil temperature and relatively high o=C3=AFl
pressure I Wonder if the o=C3=AFl is doing it=99job of removing
the heat of the engine, I mean the oil jet on the crank not spraying the
cylinders. All cylinders are geting dripping o=C3=AFl from the crank but
the lower cylinders would Always get more o=C3=AFl due to the gravity
and would be cooler.
In cruse the temps are aceptable but there must be a reason for this 30
Deg C.difference.
Any idea would be greatly appreciated.
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 hot cylinders |
Hello Richard,
Yes, this was posted to the Matronics list, on the M14 Engines list. Not the
Yak list.
I completely agree with your points about the CHT=99s and the accuracy
of the instrument. That was the reason I suggested the laser temperature gu
n/sensor. I was just trying to be low keyed about the instrument accuracy b
y suggesting an alternative temperature test. Personally, I=99m not a
proponent of any of the MGL equipment. Primarily because of my personal exp
eriences with MGL stuff. If I had to put it in single crass word, that word w
ould be =9Cjunk=9D.
I think he=99s going to find the MGL instrument readings are nowhere c
lose to the hand held laser gun.
Great to hear from you and best regards,
Dennis
Sent from my iPhone
> On Sep 26, 2021, at 10:24 AM, Richard Goode <richard.goode@russianaeros.co
m> wrote:
>
> =EF=BB
> Hello Dennis,
>
> One small point =93 was this sent to Matronics in the first place? C
ertainly I did not receive it!
>
> Then I would make the point that these temperatures are high =93 rem
ember that maximum continuous cylinder temperature is 220=C2=B0C, and up to 2
40=C2=B0C for short periods.
>
> Then I would also say that the system of measurement is not that accurate,
in my opinion, and the presence of very small amounts of dirt between cylin
der head; sending washer and sparking plug can easily distort the figures.
>
> And I think another issue is that the Murphy Moose is a big aeroplane and w
ith a standard M 14 P it does need to work pretty hard to climb in high ambi
ent temperatures.
>
> Best wishes
>
> 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 RUSSIAN SPORTING AIRCRAFT & ENGINES
> In partnership with Aerometal Kft, Hungary.
>
> From: owner-m14pengines-list-server@matronics.com <owner-m14pengines-list-
server@matronics.com> On Behalf Of Anthony Savarese
> Sent: 25 September 2021 21:55
> To: m14pengines-list@matronics.com
> Subject: Re: M14PEngines-List: M14P hot cylinders
>
> As a second test and disregarding the MGL instrument, immediately, and I m
ean immediately upon shutdown, using a laser temperature sensor point the la
ser at the exact same point on each cylinder and read the temps. I suggest a
t the flat surface around the base of each spark plug just outside the spark
plug insert. Make note of the temps on each cylinder and compare them to th
e differences between the cylinder temps you=99re seeing from the MGL.
> DENNIS
>
> Sent from my iPhone
>
>
> On Sep 25, 2021, at 1:56 PM, Sylvain April <sapril001@hotmail.com> wrote:
>
> =EF=BB
> Hi,
>
> I have been helping a friend with a high temperature of the cylinder heads
on his M14P engine,
>
> The engine is installed in a Murphy Moose and the upper cylinders are geti
ng hoter than the lower cylinders.
> 25 to 30 Deg C. Hoter than the lower cylinders.
> The bafling is tight and there is no obstruction behind the cylinder heads
to the passage of cooling air.
> We have added ample cheeks to the cowling and we have re centered the fr
ont of the cowling that was a little low and was providing a larger opening b
elow the prop spinner than above it. It did improve the cooling of the upper
cylinders but we still have a big difference between the upper cylinder hea
ds and the lower cylinders head.
> Here are the reading from the MGL instrument that we bench checked with bo
iling water.
>
> #1 :224 C
> #2 :217 C
> #3 :208 C
> #4 :196 C
> #5 :193 C
> #6 :195 C
> #7 :201 C
> #8 :205 C
> #9 :201C
>
> On a warmer day after climbing.
>
> #1 :242C
> #2 :241C
> #3 :234C
> #4 :217C
> #5 :216C
> #6 :215C
> #7 :221C
> #8 :230C
> #9 :223C
>
> The oil temperature stay at 150 to 155 Deg F and the o=C3=AFl pressure is
staying 75 to 80 PSI.
> =46rom another Moose I used to fly the o=C3=AFl temperature reach 185 Deg
F to 195 F. And the o=C3=AFl pressure stay around 65 PSI.
> The upper cylinders where also warmer in that Moose but not as much differ
ence with the lower cylinders.
>
> When I look at the cold oil temperature and relatively high o=C3=AFl press
ure I Wonder if the o=C3=AFl is doing it=99job of removing the heat of
the engine, I mean the oil jet on the crank not spraying the cylinders. All
cylinders are geting dripping o=C3=AFl from the crank but the lower cylinde
rs would Always get more o=C3=AFl due to the gravity and would be cooler.
> In cruse the temps are aceptable but there must be a reason for this 30 De
g C.difference.
>
> Any idea would be greatly appreciated.
>
> Thanks
> Sylvain April
>
>
>
>
> Envoy=C3=A9 =C3- partir de Courrier pour Windows
>
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