Today's Message Index:
----------------------
1. 02:00 AM - Re: Performance Charts for Yak-52 (Mike Beresford)
2. 05:44 AM - Re: Re: What is the cylinder torque value for the nuts at the base. (George Coy)
Message 1
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| Subject: | Re: Performance Charts for Yak-52 |
I'd be interested in seeing if there is something available. I've thought
of doing one myself, but my aircraft spends too much of its time in mainten
ance since coming to Australia.
On Friday, 21 June 2019, 04:03:12 GMT+3, HawkerPilot2015 <timsmiscaz@gm
ail.com> wrote:
Anyone have or know of old school "spaghetti" charts for performance for th
e -52? Looking at hot and high performance.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=489752#489752
S -
WIKI -
-
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
Message 2
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| Subject: | Re: What is the cylinder torque value for the nuts at the |
base.
OI have confirmed with the factory that the tightening torque of the
nuts that holds the cylinders to crankcase is 3.5 Kgf-m or 304 lbf-in.
The threads have to be clean and dry.
George Coy
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Cliff Coy
Sent: Wednesday, June 19, 2019 12:57 PM
Subject: Re: Yak-List: Re: What is the cylinder torque value for the
nuts at the base.
The torques are for clean and dry threads.
Please reference the M14-P Overhaul Manual Pg.142-143.
The Manual is available here:
http://motorstarna.com/m-14p-overhaul-manual
Overtorque of the nuts will increase the chance of the studs pulling
from the crankcase leading to further leakage.
Cliff
On Tue, Jun 18, 2019 at 2:33 PM doug sapp <dougsappllc@gmail.com
<mailto:dougsappllc@gmail.com> > wrote:
Also, from Mark Pennington, this is interesting:
https://mail.google.com/mail/u/0/?tab=rm
<https://mail.google.com/mail/u/0/?tab=rm&zx=vl5ywvgzpugl#inbox/FMfcg
xwChJkxdFPJVWFSFZcLkGTCcGrW?compose=DmwnWrRnXVSjzwCjrftdqMTFtpZNSfCdPxQ
gNrBwDsFKJDZfWGgpgdvcrDhTRrHnqLgLwBlQDDDL&projector=1>
&zx=vl5ywvgzpugl#inbox/FMfcgxwChJkxdFPJVWFSFZcLkGTCcGrW?compose=DmwnW
rRnXVSjzwCjrftdqMTFtpZNSfCdPxQgNrBwDsFKJDZfWGgpgdvcrDhTRrHnqLgLwBlQDDDL&p
rojector=1
On Tue, Jun 18, 2019 at 10:52 AM doug sapp <dougsappllc@gmail.com
<mailto:dougsappllc@gmail.com> > wrote:
I do believe the question was asked but maybe missed by some of us.
What is "wet" torque? What exactly does this mean? If I interpret the
cut n past from the net correctly then torquing the cly base studs to
304 to 330 inch pounds WET is way excessive.
>From
:https://www.engineeringtoolbox.com/torque-lubrication-effects-d_1693.htm
l
When a bolt is lubricated - less torque is required to achieve bolt
axial load or tension. Reduction of torques for lubricated vs. dry bolts
are indicated in the table below.
Lubricant
Torque Reduction
(%)
No lube
0
Graphite
50 - 55
White Grease
35 - 45
SAE 30 oil
35 - 45
SAE 40 oil
30 - 40
On Tue, Jun 18, 2019 at 3:56 AM A. Dennis Savarese
<dsavarese0812@bellsouth.net <mailto:dsavarese0812@bellsouth.net> >
wrote:
Matt,
A torque spec is there for a reason. The "feels about right" spec is
not in the spec sheet. Over-torquing is definitely not a good thing.
You may want to reconsider your torquing technique in the future.
The M14 torque specs are no where near 35 ft/lbs. That is actually 25%
more than the high end of the spec. The torque specs are as posted on
this subject.
Dennis
On Tuesday, June 18, 2019, 1:57:39 AM EDT, woodja51 <mwuillemin@mac.com
<mailto:mwuillemin@mac.com> > wrote:
<mailto:mwuillemin@mac.com> >
I bought an electronic torque wrench that beeps when you get close to
and the again when at the correct torque. And used the Chinese spanner
with it attached. I took my nuts up on paper gaskets ( there are
aluminium ones there it seems as standard ?) to 35
=C3=A2=82=AC=CB=9C lbs which is closer to the values on the m14 I
think. They should always be wet/ lubed for torque setting I believe. I
might have slightly over torqued them but would rather be a little in
the high side. Matt
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=489701#489701
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--
Clifford Coy
Border Air Ltd.
C-Parts Inc.
629 Airport Rd.
Swanton, VT 05488
802-868-2822 TEL
802-868-0035 FAX (MANUAL RECEIVE)
Skype: Cliff.Coy
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