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GeorgeCoy
Joined: 02 Dec 2010
Posts: 310
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 Posted: Tue Dec 01, 2020 7:04 am Post subject: Compressor shea couplings |
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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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richard.goode(at)russiana
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| Posted: Tue Dec 01, 2020 7:49 am Post subject: Compressor shea couplings |
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George – 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: richard.goode(at)russianaeros.com (richard.goode(at)russianaeros.com)
www.russianaeros.com
WORLD LEADERS IN RUSSIAN SPORTING AIRCRAFT & ENGINES
In partnership with Aerometal Kft, Hungary.
From: owner-yak-list-server(at)matronics.com <owner-yak-list-server(at)matronics.com> On Behalf Of George
Sent: 01 December 2020 15:02
To: yak-list(at)matronics.com
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
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
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