Free turbine to nominal???

[uhoh7]

So far, since I'm trying learn everything else, I have just set my throttles at auto, and left it there.

 

However I see a "free turbine to nominal" command mapped on the CH profile I'm using, and also I'm reading about take-off power, cruise power.

 

The manual is not totally clear to me on this point.

 

What is "adjust free turbine to nominal"?

 

What are the keyboard shortcuts to take-off, cruise, etc?

 

This not the same as the throttle settings using page-up, I presume.

 

TY sirs

Edited December 20, 2008 by uhoh7

[Threshor]

I'd like to know this as well..

 

Also, how is the new setup workin for you? Are you getting good frames? I have that 30 inch and running at the 2560X1600. I also successfully overclocked up to 3.1 ghz on my Q6600. I'm lookin for another 8800ultra 768mb to sli but can't find one. Stores don't have one locally and newegg doesn't either.

[tn_prvteye]

SLI is overrated...at least for sims. In fact, one of my cards (8800GTX) overheated so I removed it. I haven't seen a difference...in fact, the case is cooler now without the extra card heating it up.

 

I've also got the Q6600...what kind of cooling are you using? I'm considering O/Cing but don't want to press my luck with air-cooling.

 

Sorry to de-rail the thread!

 

I was looking at these commands myself. I was going to post the same question, but you beat me to it.

[Threshor]

ya, heat is an issue. I put in a Zalman 9700 fan and was able to overclock. I can go up to 3.6 ghz but it isn't stable. It took me two days of fiddling with the settings in the bios but it runs good at the 3.1. I have a asus stricker extreme which is tempermental.

 

sorry Uhoh7 we're changing your subject.....!

[RvETito]

No idea about CH profiles but I'll explain to you the free (also called power) turbine. Moving the throttle levers to Auto means that the fuel control unit of the engines will maintain 90% rotor RPM which is achieved by maintaining constant free turbine RPM since the last is what drives the rotors through the intermediate and main gearbox- they are mechanicaly connected. However, the TV3-117VMA on the Ka-50 have another feature implemented. It is possible to readjust the free turbine RPM governor (aka rotor RPM governor) to maintain either low (up to 87%) or high (up to 93%) rotor RPM. This is useful when your take-off and landing locations have severe altitude separation. By nominal is meant the setting of the free turbine RPM governor that it's currently maintaining.

 

The free turbine governor readjustment switch is on the collective stick so this is what I believe is mapped in the CH profile you're using.

[tn_prvteye]

So are there any circumstances when we should set it to "low"?

[Threshor]

I have this mapped to my ch throttle and tried it awhile back and couldn't see the RPM changing.

[kaiserb_uk]

Possibly related - can the Ka50 maintain altitude with one good engine? I took a few cannon hits on one engine and rpm was down to ~60% on the left and was unable to stay airborne - I had to put it down in the field and was unable to lift off again.

 

Is setting the govenor to high a form of boost?

[RvETito]

So are there any circumstances when we should set it to "low"?

 

Personnaly I don't use that option, I always fly with governor settings 90%.

 

Possibly related - can the Ka50 maintain altitude with one good engine? I took a few cannon hits on one engine and rpm was down to ~60% on the left and was unable to stay airborne - I had to put it down in the field and was unable to lift off again.

 

It can not only maintain altitude, it can even hover and climb with OEI, of course without payload and small amount of fuel onboard. Basically, in case of one engine failure you should (after closing cut-off and shut-off valves of the failed engine and suppress the fire if there has been any) jettison the payload you can (you can't drop Vikhr launchers), move the throttle lever of the operating engine from AUTO to MAX and maitnain IAS between 120-150 km/h. Also, open the crossfeed valve to ensure all fuel will supply the operating engine. If there are no other failures you're more than able to maintain level flight and go back to home plate at one engine. Has happened to me few times and I made it safe in one piece. However, OEI landing is a tricky moment, you'd better do it airplane style (with forward speed) because you might not be able to hover at OEI depending on your weight and landing pad condition (elevation). Even when landing on a FARP you'd better estimate your approach to touch down with certain (20-35 km/h) forward speed.

[Threshor]

Thanks AirTito, now there's an emergency procedure that I need to go practice.

[RvETito]

In reality OEI situataions are part of every multiengine helicopter pilot training. I would recommend to everyone to try it- fly level flight at speed 120-150 km/h, shut down (by closing the cut-off valve) one of the engines and see what the other engine will automatically do and how you need to become very gentle on the collective. At that speed your rotor RPM and altitude will not change after shutting down one engine.

[AlphaOneSix]

Another way to test without shutting down an engine is to use the throttles individually, and drop one down to idle and the other up to emegency. That way to can put them both back to auto and not worry about restarting the engine. Not quite the same as having one engine completely off, though.

[crazysundog]

Another way to test without shutting down an engine is to use the throttles individually, and drop one down to idle and the other up to emegency. That way to can put them both back to auto and not worry about restarting the engine. Not quite the same as having one engine completely off, though.

 

 

I agree, good practice for those pesky emergency situations!

 

I've got the throttles mapped to the large rotary axis on my X52 throttle.(I did this in the BS options, and even though I use a Saitek Profile it all works fine together......as an added bonus, the center detent on the rotary axis is the 'Auto' position!) If i take a hit in one engine, I chop the cut-off valve to that engine, and rotate my rotary CCW which gives me Max throttle on the remaining engine. Since you cannot 'click' on the throttle levers, this is great in an emergency.

[AlphaOneSix]

I agree, good practice for those pesky emergency situations!

 

I've got the throttles mapped to the large rotary axis on my X52 throttle.(I did this in the BS options, and even though I use a Saitek Profile it all works fine together......as an added bonus, the center detent on the rotary axis is the 'Auto' position!) If i take a hit in one engine, I chop the cut-off valve to that engine, and rotate my rotary CCW which gives me Max throttle on the remaining engine. Since you cannot 'click' on the throttle levers, this is great in an emergency.

 

I mapped my X52 the same way! Very convenient that the center detent on the rotary corresponds to AUTO.

[crazysundog]

Heh, almost like it was done on purpose!!

[uhoh7]

No idea about CH profiles but I'll explain to you the free (also called power) turbine. Moving the throttle levers to Auto means that the fuel control unit of the engines will maintain 90% rotor RPM which is achieved by maintaining constant free turbine RPM since the last is what drives the rotors through the intermediate and main gearbox- they are mechanicaly connected. However, the TV3-117VMA on the Ka-50 have another feature implemented. It is possible to readjust the free turbine RPM governor (aka rotor RPM governor) to maintain either low (up to 87%) or high (up to 93%) rotor RPM. This is useful when your take-off and landing locations have severe altitude separation. By nominal is meant the setting of the free turbine RPM governor that it's currently maintaining.

 

The free turbine governor readjustment switch is on the collective stick so this is what I believe is mapped in the CH profile you're using.

 

TY for your reply, sir

 

nominal seems to be the default? (no--auto must be default-nominal is boost to 93%)

 

again I'm wondering how all this relates to cruise, take-off and low---well low seem to be exactly that, regardless.

 

I'm thinking when you switch to nominal you are boosting to 93% but cannot stay there more than six minutes.

 

Re my hardware, I'm getting about 40fps in the early campaign missions, once in awhile it drops to 26.

 

thats highest rez, aa and af bumped up, no mirrors, water normal and no civ trafiic.

 

it's great really.

 

Iheard a second card won't get used by BS, so I went for powerfull single card.

 

I turn up fan to 80% when I play--it stays cool.

 

turn down to 25% on desktop, it's quiet.

I stayed 2 core, beacause again, I heard 4 core no benifit in BS, even with affinty. Running stock clock speed right now.

 

There must be some lights which come on with these settings?

[RvETito]

By nominal is meant what the fuel control unit currently is set to maintain- by default it's 90% but if you operate the free turbine readjustment the new RPM value you set will be the nominal- either 87 or 93%. It's a common term for the settings of an automatic system.

 

And yes, IRL they don't shut down an operating engine, just move it's throttle lever to Idle. I like to go the hard way in BS so I just kill it :D

[Acedy]

So are there any circumstances when we should set it to "low"?

 

According to the manual the FT RPM governor should be set to low when you want to perform a descent with a high sinkrate. See p. 6-12f.

[rmakowsky]

Low range would be for high rate of descent so that you don't overspeed your rotor.

 

Also uses less fuel so in a long cruise flight (ie Ferry flight) it might be selected. This is conjecture.

[Scif]

great read this for a stunning sim, i am really enjoying flying missions at the moment and getting to grips with the Flight Model in general.

 

One issue i do have though is trying to bind my rotaries in the game, it just dont seem to pick them up when i have a profile running with the saitek software.

 

Running X52 Non pro with Ch Pro Pedals and Vista 64 Ultimate on a E6400 clocked to 3.1ghz 4gb ram and 4870 512mb.

 

Any suggestions? as i would like to try this setup

[RvETito]

Make sure to have no profile loaded in the SST when you run BS and map everything inside the game.

[Frederf]

Wait, is the free turbine switch a 2 position or 3 position switch? I thought it was just two-position, low and nominal.

[Scif]

I mapped my X52 the same way! Very convenient that the center detent on the rotary corresponds to AUTO.

 

Ok i can now map my rotaries, but im confused, what option do u map them to say the top rotary on the x52 throttle for what u was describing, because i have tried mapping the JOY_RY to throttle, left and right throttle, but none work as u describe.

[uhoh7]

Wait, is the free turbine switch a 2 position or 3 position switch? I thought it was just two-position, low and nominal.

 

That's exactly the question---maybe someone can cut right to it for us feeble minded, hehe

 

if we hit free turbine to nominal, we go to 93%? Do we have to hit anything else?

 

we hit free turbine to low to dive.

 

then how do we get back to 90% (auto where we started)

 

ty sirs.

[crazysundog]

Ok i can now map my rotaries, but im confused, what option do u map them to say the top rotary on the x52 throttle for what u was describing, because i have tried mapping the JOY_RY to throttle, left and right throttle, but none work as u describe.

 

Go to the options menu in Blackshark, go to axis commands... do not have your SST loaded at this point. I do not remember exactly how i did it, but i believe i clicked on the Throttle space under X52 column, went to add, moved my rotary, (Joy_RY) and saved it. I have not mapped left or right throttle to a rotary, as i felt that in an emergency one engine would be lost and raising that lever could do no more harm! Exit game, load profile in SST software, start game; test. That's all the help i can be...

 

That's exactly the question---maybe someone can cut right to it for us feeble minded, hehe

 

if we hit free turbine to nominal, we go to 93%? Do we have to hit anything else?

 

we hit free turbine to low to dive.

 

then how do we get back to 90% (auto where we started)

 

ty sirs.

 

The free turbine switch is a 2 position switch, its either in low or nominal; nowhere else. The switch is located on the collective, on the top left side. I have this mapped to my Nav mode on my X52; I use the Hat3 on my throttle/collective to click up or down.

 

Before today, (i just learned that setting this switch to 'low' is the proper way to descend with forward airspeed quickly with lower RPM's) I would use my rotary to lower my throttle levers to lessen RPM's. Don't know if thats a good idea or not....