When the compressive force on a speeder spring is reduced, the propeller blades will
- remain fixed.
- fine off.
- coarsen.
Explanation
Reducing the speeder spring's compressive force lowers the RPM at which the flyweights balance, so at the running speed the flyweights now overcome the spring (an overspeed signal). The governor then ports oil to increase blade angle, coarsening the blades to load the engine and restore on-speed. A coarser blade is the standard governor response to overspeed.
iccam asking:
why? if i reduce the speeder sreeng pressure the fly weight close and the pitc become finner
Community Comments (2)
M
Mysticdemon Posts: 1 01.04.2018 / 01:36
Since there is low force on the speeder weight that means less tension so the pilot valve will go up
If pilot valve goes up it reduces tension on spring which will increase oil pressure and make the blade more coarse
Watch this video from 9:25
Easy to understand
https://youtu.be/3qvpuUB8H0U
If pilot valve goes up it reduces tension on spring which will increase oil pressure and make the blade more coarse
Watch this video from 9:25
Easy to understand
https://youtu.be/3qvpuUB8H0U
J
Jordi Posts: 198 18.06.2020 / 13:19
for anyone who doesnt have time to see the video here is an image which expresses perfectly what the question means also the answer is correct.https://www.flight-mechanic.com/wp-content/uploads/2017/07/7-17.jpg
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