4
$\begingroup$

I'm not sure that they are painted lines but it looks they are. What are they for?

enter image description here

enter image description here

More images:

enter image description here

enter image description here

$\endgroup$
4
  • $\begingroup$ It looks like they end a bit for the edge of the blade. Could they be for judging the wear of the blade, i.e. something like "if the line touches the edge, the blade needs to be replaced?" $\endgroup$ – Jörg W Mittag Dec 21 '20 at 11:41
  • 1
    $\begingroup$ @JörgWMittag most definatly not wear indicators. If your fan blade rubbed enough to wear that much you have serios problems. Hard to see if they are 3D or not in these pictures, but I would guess either some sort of alignment mark for manufacturing if they are 2D, or a turbulator of some kind if they are 3D. $\endgroup$ – XRF Dec 22 '20 at 3:10
  • $\begingroup$ This is what I love about aviation: every single piece has a meaning and serves a purpose. Always. If those lines were on a car, everybody would assume they are just decoration. $\endgroup$ – PerlDuck Dec 22 '20 at 13:34
  • 1
    $\begingroup$ I just sent an E-Mail to the E-mail addresses that found in these two pages of Rolls Royce company. Hope to get answer.: rolls-royce.com/products-and-services/civil-aerospace/… and rolls-royce.com/products-and-services/civil-aerospace/airlines/… $\endgroup$ – Roh Dec 22 '20 at 14:06

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.