DMFS BAC 1-11 FSX Upgrade

[Mike71]

--- While I can see the bubble window telling me the mouse indication for negative or positive for "R" knob, it does NOT tell me the number of feet per minute. I can used "A' knob to set to 8,000 ft but the "R" knob does not tell me number of feet per minute.

Regards,

Aharon

The knob only has a mouse tip for + or -

1 Set desired cabin altitude FIRST

2 ensure safety valve is CLOSED

3. look at the little cabin VSI gauge to the lower right as you click on the "R" rate knob (+ for climbing) to set the rate of cabin climb; the vsi needle should move as you click on the "R" knob

 

[Aharon]

The knob only has a mouse tip for + or -

1 Set desired cabin altitude FIRST

2 ensure safety valve is CLOSED

3. look at the little cabin VSI gauge to the lower right as you click on the "R" rate knob (+ for climbing) to set the rate of cabin climb; the vsi needle should move as you click on the "R" knob

I wish this extremely useful tip is written in the manuals!!! Many thanks for the answer, Mike 71

3. look at the little cabin VSI gauge to the lower right as you click on the "R" rate knob (+ for climbing) to set the rate of cabin climb; the vsi needle should move as you click on the "R" knob

That poses a new question I want 2,000 ft per minute climb after take off. Will the cabin altitude setting to 500 ft per minute affect my desired climb rate after take off or is it separate function?

Regards,

Aharon

 

[Mike71]

I wish this extremely useful tip is written in the manuals!!! Many thanks for the answer, Mike 71



That poses a new question I want 2,000 ft per minute climb after take off. Will the cabin altitude setting to 500 ft per minute affect my desired climb rate after take off or is it separate function?

Regards,

Aharon

The cabin will start to climb at the set rate until it reaches the psi limit of 7.5psi, independent of the aircraft rate of climb - that is the whole idea of the system.

I suggest anyone who is unfamiliar with details of pressurization read this web post: https://www.cfinotebook.net/notebook/operation-of-aircraft-systems/pressurization.

One gross misunderstanding about pressurization in airliners, especially by the typical passenger, is the need for it. The assumption is, "well, this not just enough oxygen up there so we need it." WRONG- there is plenty of oxygen - how the hell do they think jet fuel burns without it?

The problem is oxygen in the lungs needs to be under enough pressure to saturate the blood vessels in the lungs so the blood system has an adequate supply; if not, that is hypoxia. Hypoxic people do not feel like thy are choking or suffocating - they just loose mental and physical capability, and quickly - that is why it is termed insidious.

Military pilots go through high altitude refresher training every few years and usually get to see or are chosen to be the guinea pig by taking off one's oxygen mask and play patty cake with another sitting beside them (under the direct supervision of a supervisor). Watching what happens is quite an education. The supervisor will instantly step in and re-attach the person's mask when he knows when the limit has been reached.

Tactical jet pilots are required to have their mask on AT ALL TIMES from takeoff to landing in case of cabin pressure failure; also a good way to loose your helmet - with your head still in it - in case of ejection!

The movie "TOP GUN" shows too much of this mask off macho crap - that is not the way it is in real life.

 

[Aharon]

Thanks for awesome answer and MORE awesome assistances!!! Much appreciated, Mike71!!

Regards,

Aharon