Hyd failure - What to do...

[Yeti42]

Whilst enjoying a particularly energetic sortie on the GS server last night I managed to sustain some damage which resulted in a hyd 1 failure and engine surging (I'm presuming the intermittent bangs where engine surges).

Question: As far as I could tell the hyd 1 failure resulted in no wheel brakes, no nosewheel steering and the need to emergency lower the gear (down lever and twist) HYD ISOL switch was set to T.O./LDG. Is there an emergency procedure for hyd failures? Is this accurately modelled yet? Wing sweep, outboard and inboard spoilers, air brake and SAS all appeared to be functioning correctly...... Asking for a friend.... ;) Thanks

[QuiGon]

http://www.heatblur.se/F-14Manual/general.html#hydraulic-system

If only one of the hydraulic pumps fail it’s possible to pressurize that system from the other pump via the hydraulic transfer pump. This pump is an omni-directional hydraulically driven pump that can supply either system from the other and will maintain a pressure between 2,400 and 2,600 psi if the driving system is at around 3,000 psi. If one system pressure falls below 500 psi the pump will be secured to prevent pump damage and preserve pressure in the working system. The pump can also be manually disengaged by the pilot.

[Yeti42]

http://www.heatblur.se/F-14Manual/general.html#hydraulic-system

 

That doesn't tell me much apart from the transfer pump will try to pressurize both systems automatically if one system fails. I found the NATOPS section:

 

Complete loss of combined hydraulic

pressure will result in the following

caution lights due to the loss of a single

channel SAS actuator function: PITCH

SAS, ROLL DGR, YAW DGR, ARI DGR,

and SPOILERS lights.

The following important equipment is inoperative:

a. One-half authority of SAS/ARI actuators in

pitch, roll and yaw.

b. L AICS.

c. Inboard spoilers.

d. Emergency generator.

e. DLC.

f. Speedbrakes.

g. Normal hook.

h. Hook extend (emergency actuation available).

i. Flaps and slats (emergency actuation

available).

j. Landing gear (emergency actuation available).

k. Wheelbrakes (emergency actuation available).

l. Refuel probe (emergency actuation available

if system fluid remains in return line).

m. Auxiliary flaps.

n. Nosewheel steering.

o. Gun drive

 

It appears the rest of the failures are not modelled though. Bold items failed correctly, red items did not fail in any way...

 

Edit: Interestingly though, there's no NATOPS checklist for loss of RIO.... LOL

Edited July 30, 2019 by Yeti42

[stuart666]

Ive noticed a similar problem in multiplayer, that I take damage and the hydraulics bleed off and go mushy, before failing completely. Ive failed to discover whether there is a set proceedure that can help with this.

 

 

I dont know about RIO in NATOPs, but i think TopGun covered it fairly well. :D

[Yeti42]

Ive noticed a similar problem in multiplayer, that I take damage and the hydraulics bleed off and go mushy, before failing completely. Ive failed to discover whether there is a set proceedure that can help with this.

 

 

I dont know about RIO in NATOPs, but i think TopGun covered it fairly well. :D

 

Yes, I was in multiplayer, I suspect a hyd leak is being simulated which would result in a degradation of one or both hyd systems, the NATOPS manual says "HYD TRANSFER PUMP switch SHUTOFF" for combined pressure zero, this makes sense as you don't want to be pumping the remaining fluid from the flight system to the combined system as you'll end up with no fluid for ether system... So in summary, if it's a leak - "HYD TRANSFER PUMP switch SHUTOFF" If it's a pump failure leave the transfer switch to normal and switch the emergency pump to high before landing

[QuiGon]

It appears the rest of the failures are not modelled though. Bold items failed correctly, red items did not fail in any way...

Interesting, would be great to get some input from the devs on this! :thumbup:

[stuart666]

Yes, I was in multiplayer, I suspect a hyd leak is being simulated which would result in a degradation of one or both hyd systems, the NATOPS manual says "HYD TRANSFER PUMP switch SHUTOFF" for combined pressure zero, this makes sense as you don't want to be pumping the remaining fluid from the flight system to the combined system as you'll end up with no fluid for ether system... So in summary, if it's a leak - "HYD TRANSFER PUMP switch SHUTOFF" If it's a pump failure leave the transfer switch to normal and switch the emergency pump to high before landing

 

 

Thanks, I think ill bind that to my warthog. Its literally happening all the time.

 

 

Of course there is the question how much of this damage model is representative with what we will ultimately get when the whole system is overhauled.

[Rudel_chw]

 

It appears the rest of the failures are not modelled though. Bold items failed correctly, red items did not fail in any way...

 

I wrote a kneeboard-sized extract of the Natops procedure, but when testing it I found the same: items that were not affected by the failure:

 

https://1drv.ms/b/s!Ai6cuX3YQI26hYZib7KHARDbrIsFiA

 

Lets hope that this is because of early access and they will be modeled later.