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YF-17 Tailplane

Started by KJ_Lesnick, January 15, 2013, 03:45:39 PM

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KJ_Lesnick

January 15, 2013, 03:45:39 PM
I remember hearing something about the tailplane surfaces limiting the full performance of the plane during testing?  Is this correct?
That being said, I'd like to remind everybody in a manner reminiscent of the SNL bit on Julian Assange, that no matter how I die: It was murder (even if there was a suicide note or a video of me peacefully dying in my sleep); should I be framed for a criminal offense or disappear, you know to blame.

famvburg

#1
January 16, 2013, 06:36:02 AM
I've read something like that, but I think it was the F-18 and the remedy was to have the vertical stabs both turn inward, thereby assisting the stabilators in raising the nose.

KJ_Lesnick

#2
January 16, 2013, 11:34:53 AM
famvburg

QuoteI've read something like that, but I think it was the F-18 and the remedy was to have the vertical stabs both turn inward, thereby assisting the stabilators in raising the nose.
You mean the rudders deflecting in?  The vertical stabs aren't all moving.
That being said, I'd like to remind everybody in a manner reminiscent of the SNL bit on Julian Assange, that no matter how I die: It was murder (even if there was a suicide note or a video of me peacefully dying in my sleep); should I be framed for a criminal offense or disappear, you know to blame.

perttime

#3
January 16, 2013, 12:49:01 PM
Quote from: KJ_Lesnick on January 16, 2013, 11:34:53 AM
You mean the rudders deflecting in?  The vertical stabs aren't all moving.
Yes, they deflect the rudders inwards. Take-off videos sometimes show it clearly.

... actually, I've seen video of a Hornet taking off with the air brake up  :o I'm not convinced it was on purpose but it didn't seem to slow it down much.

KJ_Lesnick

#4
January 16, 2013, 04:21:11 PM
I'm wondering if there was any way around having to cant the fins up would a chine shelf be useful?
That being said, I'd like to remind everybody in a manner reminiscent of the SNL bit on Julian Assange, that no matter how I die: It was murder (even if there was a suicide note or a video of me peacefully dying in my sleep); should I be framed for a criminal offense or disappear, you know to blame.

rickshaw

#5
January 16, 2013, 06:58:06 PM
The rudder deflection was only required on the F/A-18 because the USN insisted on moving the main undercarriage.  When that was done, something was required to increase the tailplane deflection to raise the nose more quickly and allow rotation on the take off run.  It was a "trick" that the USN was apparently initially reluctant to believe would work when it was proposed by Northrop.  However, once it was demonstrated they were happy to accept it over a redesign of the rear fuselage.

The YF-17 did not need nor use it IIRC.
How to reduce carbon emissions - Tip #1 - Walk to the Bar for drinks.

KJ_Lesnick

#6
January 17, 2013, 03:32:31 PM
rickshaw

QuoteThe YF-17 did not need nor use it IIRC.
But they did have a flutter issue with tailplanes right?
That being said, I'd like to remind everybody in a manner reminiscent of the SNL bit on Julian Assange, that no matter how I die: It was murder (even if there was a suicide note or a video of me peacefully dying in my sleep); should I be framed for a criminal offense or disappear, you know to blame.

famvburg

#7
January 19, 2013, 07:30:55 AM
Yes, rudders then. I was thinking they were all-moving stabs.
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