Simviation Forum

Aug 11^th, 2004 at 4:38pm

CharlieTango Offline
Colonel
"They're beeping and they're
flashing."
Canada

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Posts: 11

I would call myself a novice to the FS series of games, having flown in FS2004 with my PL for almost a year now. Needless to say, lots of questions still arise on a daily basis Grin

.

I just have a quick one regarding mixture control. Say I'm taking off in a Cessna 172 from an airport that sits at an altitude of 4500ft. For takeoff would I want a full rich mixture, as if I were taking off from sea level or from below 3000ft, or should I lean it first to what I would if I were in level flight at 75% power at that altitude?

Thanks!

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Reply #1 - Aug 11^th, 2004 at 4:45pm

X56SB Offline
Colonel
im steelx

Posts: 785

i just keep it at full rich the whole time

C-17&&&&http://i2.photobucket.com/albums/y50/X56SB/c-17.jpg

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Reply #2 - Aug 11^th, 2004 at 5:00pm

RollerBall Ex Member

You wouldn't normally bother leaning a real 172 at that altitude

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Reply #3 - Aug 11^th, 2004 at 9:31pm

MattNW Offline
Colonel
Indiana

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Posts: 1762

Quote:

I would call myself a novice to the FS series of games, having flown in FS2004 with my PL for almost a year now. Needless to say, lots of questions still arise on a daily basis Grin

.

I just have a quick one regarding mixture control. Say I'm taking off in a Cessna 172 from an airport that sits at an altitude of 4500ft. For takeoff would I want a full rich mixture, as if I were taking off from sea level or from below 3000ft, or should I lean it first to what I would if I were in level flight at 75% power at that altitude?

Thanks!

It depends on what you want to do. If you can start the airplane (had that trouble one time at a high altitude airport) and take off then you are OK.

If however you can't get the engine to start you may have to lean it a little to get it to fire. Like I mentioned above I had that problem once when I first got FS2002. I was at a high altitude airfield and was trying to start the Cessna 182. I had to pull the mixture control out about half way to get the thing started.

Also, if you want to perform a maximum performance takeoff then I'd suggest leaning it to max RPM. Just set the engine a little above idle and then adjust the mixture until your RPMs are at their highest with that throttle setting.

In Memory of John Consterdine (FS Tipster)1962-2003

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Reply #4 - Aug 12^th, 2004 at 2:21pm

Fozzer Offline
Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.

Posts: 24861

I find that leaning to the left when banking left, and leaning to the right when banking right comes quite naturally... Grin

...!
...sorry... Wink

...LOL...!

In my little Cessna props I always slightly lean the mixture once above 2500 feet ASL.
I pull the mixture control out until the engine falters, and then push it in slightly until the engine runs sweetly.. 8)...!
If I have Manifold and EGT gauges fitted I keep an eye on them as well.
A fuel flow gauge is useful as well... Wink

...LOL...!
Leaner mixture = more miles to the gallon, and a more efficient engine... Grin

...!

Out of interest I found that trying to take off in a Cessna 152 from Big Bear City Airport (L35), NE of Los Angeles which lies at an altitude of 8000 Feet ASL, it is almost impossible to take off within the length of the runway, and extremely difficult to climb away... Shocked

...!
My little microlights cannot even get off the ground, because of the low air density... Cry

...!
LOL...!
Once you are up in the air and speeding along it's o.k. at high altitudes, but trying to get started on the ground is a different matter... Roll Eyes

....

...!

Cheer all...!

Paul...fiddlin' with his mixture control...as usual... Wink

...!
LOL...!

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Reply #5 - Aug 12^th, 2004 at 2:54pm

CharlieTango Offline
Colonel
"They're beeping and they're
flashing."
Canada

Gender:
Posts: 11

Haha!

I guess that's why it's handy to fly with a passenger or two:

"Okay, we're turning onto a left downwind... alla you in the back! Lean over to the left hand side!"

Actually, what's sad is that we used to do that with passengers back when I was sailing. We'd say we were taking them on a nice cruise on the lake, and then use them for ballast when the wind picked up. Hey, the boat goes faster with more people hanging off the windward side! Grin

But awright, thanks for the advice! At the moment in FS2004 I'm tooling about the Rockies in a Cessna 172, and I've noticed lately that the higher I get and the higher the available airports get, the more the plane has been lagging on takeoff. I wasn't sure if I should lean the mixture more carefully, or just get out and push Grin

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