F14B Q's: T/O checklist

[Gideon312]

Good morning all,

Q: In the (NAVAIR) TAKEOFF checklist is stated:

- "ATLS" - "ON"

- "BIDIRECTIONAL" - "NORMAL"

What is the purpose, and where can I find the switches?

 

[Golo]

ATLS - Asymmetric Thrust Limiting System, F-14B only (middle of the left side console, left of the throttle), on with cover closed

With operative ATLS, the magnitude of any asymmetric thrust in MAX power will be reduced, thereby reducing the control requirements to maintain the flight condition
or reducing time to recover if a departure has occurred. ATLS should be engaged from startup to shutdown. ATLS can be turned off if required for tactical considerations
such as single-engine ACM bugout.

(basicaly if one of your engines craps out if you are in full burner, the other engine will be limited to min afterburner (? I think) only as not to send you into deadly flat spin right away.

BIDIRECTIONAL - Hydraulic Bi-Directional Pump, F-14 A and B (back of the right side console), normal with cover closed

To assure the continuance of main system hydraulic pressure with an engine or engine-driven pump inoperative, a second source of pressure is provided by the hydraulic transfer pump. This unit consists of two hydraulic pumps, one in each of the main hydraulic systems, interconnected by a common mechanical shaft. Thus, a pressure deficiency in one
system is automatically augmented using pressure in the other system as the motive power. The result is bidirectional transfer of energy without an interchange of system
fluid. The efficiency of the pump is such that a 3,000-psi system on one side will pressurize the other system to approximately 2,400 to 2,600 psi.

[Gideon312]

Awesome thanks