Today's Message Index:
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1. 07:04 AM - Compressor shea couplings (George)
2. 07:49 AM - Re: Compressor shea couplings (Richard Goode)
Message 1
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| Subject: | Compressor shea couplings |
For General info:
The shear pins of the coupling of the air compressor are manufactured in two
dimensions:
* 3 millimeters on diameter for the shear pin p/n 14-611-252;
* 3.5 millimeters on diameter for the shear pin p/n 14-611-252-01.
Please note this coupling is a fuse and the shear torque has to be 22 kgf-m
or 159 lbf-ft. If pins with bigger diameter are installed then at overload
this fuse will not protect the gears of the engine. We strongly recommend
installing pins with maximum 3.5 millimeters on diameter. In order to do
this it is sometimes necessary to make new holes in coupling, with the
diameter between 3.5 and 3.518 millimeters (of course reamed holes).
George Coy
Message 2
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| Subject: | Compressor shea couplings |
George =93 absolutely correct. And of course the pins need to be
of the right material which will shear when overloaded!
RICHARD GOODE AEROBATICS
Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK
Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
e-mail: <mailto:richard.goode@russianaeros.com>
richard.goode@russianaeros.com
www.russianaeros.com <http://www.russianaeros.com>
WORLD LEADERS IN RUSSIAN SPORTING AIRCRAFT & ENGINES
In partnership with Aerometal Kft, Hungary.
From: owner-yak-list-server@matronics.com
<owner-yak-list-server@matronics.com> On Behalf Of George
Sent: 01 December 2020 15:02
Subject: Yak-List: Compressor shea couplings
For General info:
The shear pins of the coupling of the air compressor are manufactured in
two dimensions:
* 3 millimeters on diameter for the shear pin p/n 14-611-252;
* 3.5 millimeters on diameter for the shear pin p/n 14-611-252-01.
Please note this coupling is a fuse and the shear torque has to be 22
kgf-m or 159 lbf-ft. If pins with bigger diameter are installed then at
overload this fuse will not protect the gears of the engine. We strongly
recommend installing pins with maximum 3.5 millimeters on diameter. In
order to do this it is sometimes necessary to make new holes in
coupling, with the diameter between 3.5 and 3.518 millimeters (of course
reamed holes).
George Coy
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