This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionOtto Engines - WMSTR Montage 2.ogv
English: This is a quick montage of the Otto engines running at the Western Minnesota Steam Threshers Union (WMSTR), in Rollag, Minnesota.
The little trip arm on end of each engine fires the spark plug, while the cams open and close the intake and exhaust valves. The spinning balls are the centrifugal governor and the camshaft is powered from gearing on the main crankshaft.
These machines are designed to run at a constant speed and only use fuel when the engine RPM slows down. These engines on display are running unloaded and so the only operating resistance is from bearing friction and operating the valve train.
Date
Source
Own work
Author
DMahalko, Dale Mahalko, Gilman, WI, USA -- Email: dmahalko@gmail.com
Licensing
I, the copyright holder of this work, hereby publish it under the following licences:
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the licence, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible licence as the original.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation Licence, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the licence is included in the section entitled GNU Free Documentation Licence.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue
You may select the licence of your choice.
Captions
Add a one-line explanation of what this file represents
{{Information |Description={{en|1=This is a quick montage of the Otto engines running at the Western Minnesota Steam Threshers Union (WMSTR), in Rollag, Minnesota. The little trip arm on end of each engine fires the spark plug, while the cams ope