Propeller Protractor
Object detail
Accession number
2006.432
Description
An aluminium propeller protractor with two liquid filled levels on front at centre and bottom left, protractor has wooden handle on reverse. Has wooden storage case with removable lid on which has been printed PROPELLER PROTRACTOR CASE. Used to measure the propeller blade angle or control surface at a specific station to determine proper adjustment.
Brief History
Used to measure the propeller blade angle or control surface at a specific station to determine proper adjustment.
The frame of the protractor is aluminium and has three sides which are 90ยบ to each other. A level is mounted on one corner of the front of the frame. This corner spirit level swings out and is used to indicate when the protractor is vertical. A moveable ring is located in the frame and is used to set the zero reference angle for blade or control surface angle measurements.
The frame of the protractor is aluminium and has three sides which are 90ยบ to each other. A level is mounted on one corner of the front of the frame. This corner spirit level swings out and is used to indicate when the protractor is vertical. A moveable ring is located in the frame and is used to set the zero reference angle for blade or control surface angle measurements.
Marks
Propeller protractor case
Credit Line
Propeller Protractor, 2006.432. The Museum of Transport and Technology (MOTAT).
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