Flaps & wingsweep behaviour

[Mauritz]

While playing around with flaps & wingsweep configurations I noticed some unexpected behavior.

 

With wings swept manually aft of 25° and moving the flaps handle past 5° the wings were automatically actuated forward & the auxiliary flap deployed.

 

Ever curious I decide to pull the wing handle into emergency mode & commanded 30° sweep & moved the flaps past 5°, again the wings came forward to 20 & deployed aux flaps. Upon retracting the flaps the wings moved back to 30°.

 

Accelerating to above 300 kts ias @ 15,000ft with the wings to auto at about 25° and moving the flaps handle once again moved the wings full forward to deploy auxiliary flaps

 

Apart from disallowing movement of the wing aft of 21° and 50° when deployed I was not expecting the flaps system to interact with sweep in this way.

 

As an aside I was glad to see this behavior does not occur with the wings past 50, even if the flaps handle is allowed to move aft in the cockpit.

[Golo]

Probably a BUG, it should behave like this:

 

From 01-F14AAP-1 (01-F14AAA-1)

 

2.20.5.3 (2.19.2.4) Flap Wing Interlocks. The main flap and auxiliary flap commands are interlocked electrically and mechanically with the wing sweep to prevent flap fuselage interference. An electrical interlock in the CADC and a mechanical command in the wing-sweep control box prevent wing sweep aft of 22° with auxiliary flaps extended. In a similar manner, upon extension of the main flaps, the wings are electrically and mechanically limited to wing-sweep angles less than 50°. The FLAP handle is mechanically prevented from moving to the down position if wing position is aft of 50°. If flaps are lowered with wings between 21° and 50°, main flaps will extend but auxiliary flaps will remain retracted.

Edited December 16, 2020 by Golo

[Golo]

@Cobra847@Naquaii Hi, guys since we were on a subject of flaps function, can you take a look at this too? I thing it got overlooked, I was gonna bring this up later but now is as god of a time as any I guess. I already mentioned it Victorys post about flaps, note 2.