This is a wonderful forum! As a new member, I am learning quite a bit, and spending much too much time browsing the contents ;-}.
I am a new docent at our local museum (Historic Flight Foundation in Everett Washington) and we are fortunate enough to have a Mk IX Spitfire in our collection. This aircraft is newly acquired, and is in pristine condition.
I am bombarded by one question over and over, and no one here seems to have the answer. On the back side of the four bladed prop (airscrew?) there are small yellow lines, one per blade, about 1/4 of the way down from the tip. Can anyone enlighten me as to the purpose of these lines?
John
By: gramps - 24th January 2011 at 20:27
Spitfire Mk IX Prop
Thank you for the reply on the chordwise line on the blade. I should be able to sleep better this evening!;)
By: mike currill - 24th January 2011 at 18:22
Isn’t it amazing what you can learn just by reading this forum? I’d never even noticed they were there.
By: Camlobe - 24th January 2011 at 18:16
Hello Gramps, and as Sopwith says, welcome.
The yellow, chordwise lines that you refer to are called ‘Station Lines’. These are the reference lines used to set the pitch angle of the blades when assembling the prop on the prop bench.
Hope this helps.
camlobe
By: Sopwith - 24th January 2011 at 17:52
Welcome to the forum Gramps.I can;t say for sure what the yellow mark would be for other than to give a visual indication when running when viewed from behind for ground crew or pilot,similar to the yellow tips viewed from the front but of course they wouldn’t need to be as visible,if that makes sense.No doubt someone on here will know for sure.Cheers.
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January 24, 2011 at 5:19 pm