F-14 change possibly?

[Stingray72]

Hi all!!

 

I have a question. I downloaded the F-14D by Typhoon, and also the tweak for it by Aleckx. The flight model with the elevators acting dual as ailerons is a great addition. Now, is this a standard feature on all the F-14's? Wondering because I fixed my stock MF A model to have the same feature to it, I just kinda copied and pasted that portion of the data.ini into my A data.ini and Viola! I had a nice rolling F-14A.

 

So my question is can I post that on here if it is really like that in real life for the A as well? I would like to, but only if it is accurate (if not I will also change my A back to stock), and only if that is something I am allowed to do as I don't want to step on anyone's business with an airframe change like this, even a minor one. I know Aleckx did it to Typhoon's D, but did he have to get expressed permission to change it and then post it? Or can I just, at a minumum, upload jst the F-14A data.ini I made?

 

~Stingray

[+Fubar512]

All F-14 variants had differential stabs.

[Stingray72]

Ok, does that mean that the F-14A's elevators did not help roll the plane like they do in the D?

[+FastCargo]

The term 'differential' implies that the stabilizers move differently.

 

In other words, all variants of the F-14 had stabilizers that moved symmetrically for pitch, and asymmetrically for roll. Several other fighters (and some bombers) of that generation also employed this technique to increase manuverability.

 

FC

[Stingray72]

FC, thank you. I hadn't realized that he had said "differential", I thought it said "different" and went and found the answer in a video old enough to only have been F-14A's.

 

So can I post the fix on the downloads page or am I overstepping a boundary somewhere?

 

~Stingray

[turkeydriver]

FC, thank you. I hadn't realized that he had said "differential", I thought it said "different" and went and found the answer in a video old enough to only have been F-14A's.

 

So can I post the fix on the downloads page or am I overstepping a boundary somewhere?

 

~Stingray

 

FYI the reason the F-14 used its horizontal stabs for roll control was because it didn't have ailerons-just spoilers. This seems to be a feature on swing-wing aircraft due to the near impossiblility of having the aileron control roll the same way regardless of sweep angle. The overwing spoilers do work with the stabs to assist in roll. This is one of the shortcomings of a swing-wing design other than complexity and weight-the lack ailerons means you don't roll as fast as a fighter equipped with them.

[+Fubar512]

F-15s, MiG-29s, and Su-27s (to name a few) do not have swing wings, and yet are equipped with differential stabs, or elevons. The reason is simple, they augment the normal ailerons on those aircraft at low air speeds.

 

In the case of the Su-27, its ailerons serve a dual purpose, they double as flaps (flaperons), so roll authority is provided by the elevons during takeoff, approach, and landing.

[Caesar]

All versions of the F-14 used both spoilers and the horizontal stabilizers for roll control, until the wings reached a certain sweep degree. After that point, all roll control, as well as pitch control, was provided by the horizontal stabs.

 

Ref 01-F14AAA-1 para 2.21, dated 15 May 2003: "Roll control is effected by differential stabilizer deflections and augmented by spoilers at wing−sweep positions less than 57º (62º in aircraft BuNo 162611 and subsequent and earlier aircraft incorporating AFC 717)."

 

The F-14B and D NATOPS read similarly at para 2.23, only that those aircraft lock down the spoilers at 62º rather than 57. So, as previously stated, all F-14's use both spoilers and differential horizontal stabs for roll control; later model A's, B's, and D's just lock down the spoilers at higher sweep angles than older A's.