Methods for altitude changes

Paul kgyy writes:

For serious climbing, use power and rich mixture, then reduce MP,
prop, and mixture as needed at desired altitude.

_Always_ rich for a climb? At altitudes above a few thousand feet MSL, it
seems that a rich mixture just slows me down.

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...
Paul kgyy writes:

For serious climbing, use power and rich mixture, then reduce MP,
prop, and mixture as needed at desired altitude.

_Always_ rich for a climb? At altitudes above a few thousand feet MSL, it
seems that a rich mixture just slows me down.


When was the last time you cleaned the plugs in your DESK?

In rec.aviation.piloting Mxsmanic wrote:
Paul kgyy writes:

For serious climbing, use power and rich mixture, then reduce MP,
prop, and mixture as needed at desired altitude.

_Always_ rich for a climb? At altitudes above a few thousand feet MSL, it
seems that a rich mixture just slows me down.

In a real airplane with a real engine that generates real heat and
costs real money to overhaul there are conciderations beyond how
fast you go.

--
Jim Pennino

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writes:

In a real airplane with a real engine that generates real heat and
costs real money to overhaul there are conciderations beyond how
fast you go.

I guess that's a problem for real pilots. It's not a problem for me.

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Mxsmanic wrote in
:

writes:

In a real airplane with a real engine that generates real heat and
costs real money to overhaul there are conciderations beyond how
fast you go.

I guess that's a problem for real pilots. It's not a problem for me.


you're not even an unreal, pilot, djikkhedd.


Bertie

In rec.aviation.piloting Mxsmanic wrote:
writes:

In a real airplane with a real engine that generates real heat and
costs real money to overhaul there are conciderations beyond how
fast you go.

I guess that's a problem for real pilots. It's not a problem for me.

Then why bother asking how real airplanes fly?

Just go play with your simulator and do what you want.

Flying a real airplane requires concidering a pile of factors such
as aircraft performance, equipment and condition, weather, temperature,
density altitude, center of gravity, airspace types, pilot health and
general disposition, maneuvering speed, fuel burn, costs, engine
health, etc.


--
Jim Pennino

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_Always_ rich for a climb? At altitudes above a few thousand feet MSL, it
seems that a rich mixture just slows me down.

When you're climbing, airspeed is less and engine power is higher,
generating more heat in the air cooled cylinders. A rich mixture
helps keep cylinder temps under control because more fuel is
evaporated than is burned. Nothing is automatic with these old
engines, though Teledyne has developed a single lever Fadec system
that supposedly takes care of this with electronic monitoring. Still,
even Fadec should enrich the mixture in climb. Pilots with engine
monitors (JPI, EI) may not go to full rich when climbing since they
can monitor cylinder temps in real time.

If you want a good education on piston engine management, read through
John Deakin's articles in Avweb.

Paul kgyy wrote:
Nothing is automatic with these old
engines,

Many carbs actually go beyond the mixture lever's full rich at wide open
throttle.

Paul kgyy writes:

When you're climbing, airspeed is less and engine power is higher,
generating more heat in the air cooled cylinders. A rich mixture
helps keep cylinder temps under control because more fuel is
evaporated than is burned.

But if you are, say, at 9000 or 10000 feet, don't you risk losing a lot of
power just when you need it most if you set a rich mixture?

The POH for the Baron I fly in the sim says "full rich or as required for
altitude," IIRC. Unfortunately it's not very specific about exactly how to
determine the correct mixture at higher altitudes.

If you want a good education on piston engine management, read through
John Deakin's articles in Avweb.

I think I have; I recall it being quite good, albeit complicated.

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In rec.aviation.piloting Mxsmanic wrote:
Paul kgyy writes:

When you're climbing, airspeed is less and engine power is higher,
generating more heat in the air cooled cylinders. A rich mixture
helps keep cylinder temps under control because more fuel is
evaporated than is burned.

But if you are, say, at 9000 or 10000 feet, don't you risk losing a lot of
power just when you need it most if you set a rich mixture?

The POH for the Baron I fly in the sim says "full rich or as required for
altitude," IIRC. Unfortunately it's not very specific about exactly how to
determine the correct mixture at higher altitudes.

That's because it is one of the things all real pilots have to learn
early in their training to fly real airplanes.

Real pilots are also trained to know that "as required for altitude"
means density altitude performance.

If you want a good education on piston engine management, read through
John Deakin's articles in Avweb.

I think I have; I recall it being quite good, albeit complicated.

And yet another difference between simulated by Microsoft and real
flying...

--
Jim Pennino

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