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View Full Version : Do you manually adjust prop-pitch, fuel mix etc?



Vargtass82
07-18-2006, 06:19 PM

Treetop64
07-19-2006, 09:28 PM
I adjust those in the planes that historically required manual tweaking of the "Black, Blue, and Red" knobs. Some of the planes had electro-mechanical automatic systems, like the Bf-109 series, so I'll leave it as that for those types.

Some of the Soviet planes had a pretty crazy workload for their pilots, even some of the late war types (La-7s).

PlaneEater
07-20-2006, 04:14 PM
I *should*. I have controls for pitch and mixture both set.

What I've found is that aside from toggling the supercharger when needed, I barely use either pitch or mix, or most of the engine commands. On most planes I'm unfamiliar with the intricacies of tuning the throttle and prop pitch for the best speed.

My impression of the mixture controls is that the different settings don't really seem to do much (aside from idle cutoff). The magneto switches truly are useless--I have them bound but have never, ever used them or know anybody who has. In fact, I remember something about magneto-related features being disabled in the sim a while back.

I also haven't noticed any big benefits to reducing manual pitch from 100%, except for landing or heat control (which the rads do better, I thought).

If somebody could explain how to really wring the full speed out of the manual pitch and mix controls, I'd be very grateful.

Treetop64
07-20-2006, 04:29 PM
Originally posted by PlaneEater:
I *should*. I have controls for pitch and mixture both set.

What I've found is that aside from toggling the supercharger when needed, I barely use either pitch or mix, or most of the engine commands. On most planes I'm unfamiliar with the intricacies of tuning the throttle and prop pitch for the best speed.

My impression of the mixture controls is that the different settings don't really seem to do much (aside from idle cutoff). The magneto switches truly are useless--I have them bound but have never, ever used them or know anybody who has. In fact, I remember something about magneto-related features being disabled in the sim a while back.

I also haven't noticed any big benefits to reducing manual pitch from 100%, except for landing or heat control (which the rads do better, I thought).

If somebody could explain how to really wring the full speed out of the manual pitch and mix controls, I'd be very grateful.

In a tactical situation, leaving your prop at 100% (or minimum pitch) is the only way to go. It's not terribly fuel efficient, but you'll get the most revs - and more power - from the engine. Adjusting the pitch is only practical when you are configured for cruising.

When cruising, you'll want to pull the prop setting back a bit and lose a few hundred RPMs, depending on the plane you're flying. But you'll also want to throttle back a few inches of mercury (or a fraction of a bar of pressure) as well. For example, in many American fighter aircraft, an ideal cruise setting was rougly 30-32" of manifold pressure and 1900-2100 RPM, again contingent upon which craft is flown. Sometimes, if the pilot really wanted to stretch the fuel economy, he could pull the prop back to as low as 1700 RPM or even lower.

Reducing the prop setting acts pretty much like shifting to a higher gear, or overdrive, in an automobile. It's done to maintain a reasonable cruise speed while maximizing fuel economy.

The mixture settings apply the higher you fly. The air is thinner at higher altitudes, so the engine is taking in less air the higher it flies. If you maintain the same amount of fuel flow as you fly higher, the fuel-air mixture in the combustion chamber will become too fuel "rich", and you will lose power. Go high enough and the engine will eventually shut down.

That is why it is nesessasry to "lean" the fuel mixture as you fly higher. The air gets thinner, so inject less fuel into the combustion chamber to maintain the optimum fuel-air balance.

Again, many aircraft have an automactic mixture setting to help reduce the workload for the pilot. This is especially helpful in a tactical situation where you and your adversary are constantly making dramatic altitude changes. That last thing you need to worry about is wheter or not you have the correct mixture setting in a given moment. And God help you if you don't, and your opponenet does...

tagTaken2
07-20-2006, 10:54 PM
Originally posted by Vargtass82:
Can one be serious and fly online without doing anything with it? Or is it like refusing to learn how to drive a car with manual transmission?


For offline use, it's more of a novelty. I play around with it, but I never bothered finding out historical settings for each aircraft. For online, I believe it's important.

Old_Canuck
07-20-2006, 11:25 PM
Originally posted by tagTaken2:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Vargtass82:
Can one be serious and fly online without doing anything with it? Or is it like refusing to learn how to drive a car with manual transmission?


For offline use, it's more of a novelty. I play around with it, but I never bothered finding out historical settings for each aircraft. For online, I believe it's important. </div></BLOCKQUOTE>

I was told that the "prop pitch exploit" was corrected in an earlier patch. Can anyone add more details to this?

Just for fun, try setting the Bf 110 to 60% power and 40% prop pitch. It gets a real deep sound like a Harley loafing along in high gear.

JG53Frankyboy
07-21-2006, 02:45 AM
well, if CEM is activated in the gamesetings, you have to care about
Propeller
Mixture
Supercharger
Radiator
settings (sure, depends on what systems the special planes has) to get the best performance out of the plane................

bubiH
07-21-2006, 03:23 AM
Why take a poll if you want to learn how to do something correctly? Do you plan on blindly following the majority opinion? Instead, why not look for information which you could evaluate for yourself?

And how could you possibly learn whether it is advantageous to use "Prop-pitch" without even asking in your poll if people are using the default setting (100% pitch)? Suppose everyone who answers your poll answered "I manually set everything I can". You would still not know that, perhaps, a much greater number of people use the default setting and never touch the control during combat.

So much for the poll. As for your basic question, I will give you my conclusions about propellor control which I have formed through years of flying this sim and my research about the mechanism of a constant-speed prop: you can, and should, fight without ever touching your RPMs (through the "Prop-pitch" controls.

Why would you ask your engine for less power (RPMs) when you need it most? There is no flight condition in which you can achieve a higher speed or acceleration by using a lower RPM setting (and thus choosing to operate your engine at a speed which produces less power).

Instead, use "prop-pitch" for 1) engine cooling and 2) cruising, to go as far as possible on a limited amount of fuel.

As for the aircraft with a possibility of direct propellor control, there are very few in this game: 109, FW, maybe the Italian planes with Daimler-Benz engines, and perhaps a few others. I don't think any practical advantage can be gained by reverting to manual control because there is a constant danger of over-revving, but I will let specialists address this type of aircraft.

Good luck in your quest for knowledge; be careful in your questioning or the information gained will be useless.

JG53Frankyboy
07-21-2006, 04:25 AM
the Fw190s have actually a ConstantSpeedPropeller when you go to manual.
and you will put more performance out of them flying on manual !
weird but true.
you just have been carefull in powerdives - their CSP can overrev, espacially that one of the Jumo 213 engines.

i fly the BMW Fw190 in auto when im making formation flying - easier to give powersetting to comrades via voicecomm. in combat always on manual.
the Jumo Fw190 i fly always in auto, enough performance and i havent to care engine damage because of overrev.


the german Daimler Benz driven planes , than you have direkt control over the propellerblade angle in manual mode !
there was a time in this game when you could get more power out of the planes when on manual, but this is gone.
so, as it it very difficult to manage (danger of overrev), there is absolutly no need ever to change to manual.
thats Bf109s, Bf110 and Do335.

italian (MC202/5) and japanese (Ki-61) planes with licensed build DB engines have standart CSP propellers.

DIRTY-MAC
07-21-2006, 06:03 AM
Vargtass82 e du svensk?

dbillo
07-21-2006, 06:43 AM
Originally posted by bubiH:
There is no flight condition in which you can achieve a higher speed or acceleration by using a lower RPM setting...

What about a dive?

Art-J
07-21-2006, 09:11 AM
I'd also suggest using RPM control when Your plane equipped with CSP is shot to pieces (engine not worky! http://forums.ubi.com/groupee_common/emoticons/icon_eek.gif) and You're trying to conserve every foot of altitude and every mile of distance while gliding towards Your side of the virtual frontline. Max RPM causes noticeable drag and slows the plane down (cool thing during landings, on final approach, but not in this situation http://forums.ubi.com/groupee_common/emoticons/icon_rolleyes.gif). Lowest RPM possible (or even feathering the prop on a few types of planes) reduces the drag - You've got a few more minutes to drink a relaxing glass of vodka before exciting crashlanding http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif )

Cheers - Art