Max89 Posted November 30, 2017 Share Posted November 30, 2017 Anyone know about this bump on the F-15C's rudder? It's present on most F-15C kits, but why haven't I been able to find a single photo of the actual aircraft where this bump is visible? Quote Link to post Share on other sites
CF104 Posted November 30, 2017 Share Posted November 30, 2017 Hi, Check out the following photo. F-15C Photo showing rudder 'bumps'. Cheers, John Quote Link to post Share on other sites
BillS Posted November 30, 2017 Share Posted November 30, 2017 Rotary actuator fairing Quote Link to post Share on other sites
Max89 Posted November 30, 2017 Author Share Posted November 30, 2017 (edited) Ah, I see it there. It's very clear on that photo. How come I don't see it on this aircraft? Did they change it on later blocks or is it just difficult to see because of the lighting? http://www.airliners.net/photo/USA-Air-Force/McDonnell-Douglas-F-15C-Eagle/1089354/L?qsp=eJwtjUsKwkAQRO/SawU/ECW7eAFdeIGmp4gDYzJ0d8AQcndnorv68WohGQfHx59zBrVkYJUX7Siz8tuoXUjRR3Nlj%2BPQiU%2Bcyu7a7A/HS1OGNqrf5hIFdnQiyI7wz%2B8aoLWCycbs68epSujj584VEqLlxBsFzjHRun4BqOcyRg%3D%3D http://www.airliners.net/photo/USA-Air-Force/McDonnell-Douglas-F-15C-Eagle/1137086/L?qsp=eJwtjUsKwkAQRO/SawU/ECW7eAFdeIGmp4gDYzJ0d8AQcndnorv68WohGQfHx59zBrVkYJUX7Siz8tuoXUjRR3Nlj%2BPQiU%2Bcyu7a7A/HS1OGNqrf5hIFdnQiyI7wz%2B8aoLWCycbs68epSujj584VEqLlxBsFzjHRun4BqOcyRg%3D%3D Edited November 30, 2017 by Max89 Quote Link to post Share on other sites
airmechaja Posted November 30, 2017 Share Posted November 30, 2017 I have the Drendel F-15 walk around and none of the C's or E's in that book have the fairing. The book was published in 2001. I know someone here will have the answer. Quote Link to post Share on other sites
CF104 Posted November 30, 2017 Share Posted November 30, 2017 The 2nd Edition of "The Modern Eagle Guide" by Jake Melampy has a brief description of the rudder bulges and why some have them and others don't on page 126. To paraphrase, the early rudders didn't have it while later ones did with varying bulge sizes. This was due to early problems with the rudder at the rotary actuator attachment point. Apparently this external reinforcement has been incorporated internally which is why you now see some with and without the bulge. Cheers, John Quote Link to post Share on other sites
BoeingDriver Posted December 1, 2017 Share Posted December 1, 2017 That’s because those rudder types are no longer installed on the jet. The 15 has gone through a few different rudder mods. Quote Link to post Share on other sites
Ol Crew Dog Posted December 8, 2017 Share Posted December 8, 2017 On November 30, 2017 at 12:08 AM, BillS said: Rotary actuator fairing It's the beef up for the mounting of the rudder on the top of the rudder actuator, we started developing cracks on the teeth on the mount causing the rudder not maintaining enough deflection. Also the mount bolts are are safety with wired so they don't back off as the tourque of the rudder actuator caused the mount bolts to loosen, we lost some rudders inflight . I think the was me that Stated about the rudders in Jakes first book. Quote Link to post Share on other sites
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