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propellers 009.jpg
Jim Allen

propellers 009.jpg

All these propellers have been hardened after annealing to allow pitching. Anneal C-20 beryllium copper by heating to 1450 deg. F (dull red) in a dark room. Quench immediately in ice cold water. If the props are heated to hot during annealing, the beryllium will leach out & the blades connot be hardened. I re-anneal finished balanced pitched props to ensure stabilization before hardening.
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propeller details
Added by
Jim Allen
Date added
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Image metadata

Device
OLYMPUS IMAGING CORP. D595Z,C500Z
Aperture
ƒ/3.8
Focal length
12.0 mm
Exposure time
1/80 second(s)
ISO
100
Flash
Auto, fired
Filename
3618-1122253527-propellers 009.jpg
File size
62.5 KB
Date taken
Wed, 20 July 2005 9:18 PM
Dimensions
640px x 480px

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