David Megginson writes:
For the record, I fly lean of peak, wide-open throttle regularly in cruise
-- my engine runs cooler, I burn a lot less gas to produce the same power
(about 8.5 gph instead of 10 gph), my spark plugs don't foul, and the risk
of CO poisoning virtually vanishes, so
On Tue, 02 Mar 2004 18:53:34 -0500, David Megginson
[EMAIL PROTECTED] wrote:
It varies with throttle and mixture. At 75% power, mine indicates about
5 psi running lean of peak or about 7 psi running rich of peak. I don't
remember what it indicates in a full-rich, full-power climb.
Is it usual
Matthew Law wrote:
Is it usual to make the approach or initial climb-out with the mixture
set full rich and prop fine in your aircraft? I'm just wondering
because it's part of the downwind and pre-take off checks for the
aircraft I fly (although I skip over the prop check because it's not
David Megginson wrote:
Like the Archer, the Warrior has a fixed-pitch prop. You have to go up
to the Archer (or the now-discontinued Pathfinder) to get a CS prop on a
PA-28.
For go up to the Archer, read go up to the Arrow.
All the best,
David
___
Matthew Law wrote:
Is it usual to make the approach or initial climb-out with the mixture
set full rich and prop fine in your aircraft? I'm just wondering
because it's part of the downwind and pre-take off checks for the
aircraft I fly (although I skip over the prop check because it's not
Ryan Larson wrote:
For landing it is advisable to make sure that your mixture is rich
enough to do a go around with full power.
Unless you choose to do overshoots pushing forward both levers (or knobs, in
a Cessna). I still go to full rich for descent and landing, but it
certainly doesn't do
On Thursday 04 March 2004 01:16, Ryan Larson wrote:
Matthew Law wrote:
Is it usual to make the approach or initial climb-out with the mixture
set full rich and prop fine in your aircraft? I'm just wondering
because it's part of the downwind and pre-take off checks for the
aircraft I fly
David Megginson wrote
[This posting is directed primarily at YASim's daddy, Andy
Ross, but I'll be
interested in hearing from others as well.]
1. Engine Idle
--
I've been spending a bit of time on the PA-28 model in YASim, and one
problem is that the engine idles far
David Megginson wrote:
I've been spending a bit of time on the PA-28 model in YASim, and
one problem is that the engine idles far too fast sitting still on
the ground (around 1000 rpm, instead of 600-650 rpm). Is there any
simple parameter I can tune to slow it down a bit?
Not really. The
Andy Ross said:
What do we need to do to get YASim to publish convincing values for
these properties for piston engines?
/engines/engine[*]/oil-pressure-psi
/engines/engine[*]/oil-temperature-degf
/engines/engine[*]/fuel-pressure-psi
I'm not quite sure what convincing values
Andy Ross
David Megginson wrote:
I've been spending a bit of time on the PA-28 model in
YASim, and one
problem is that the engine idles far too fast sitting still on the
ground (around 1000 rpm, instead of 600-650 rpm). Is there
any simple
parameter I can tune to slow it down
Andy Ross wrote:
I'm not quite sure what convincing values for these properties would
be. The pressures are pump-driven and are, or should be, static under
normal conditions, right?
Not quite. First, I think that the main pumps run off the accessory drive
(I'll have to check), so they will be
Jim Wilson wrote:
If you had an oil-pressure-psi-idle and oil-pressure-psi-maxrpm property you
could then interpolate something reasonable. Oil-temperature could be hacked
up from a normal maximum and some combination of rpm, time and outside temp.
I'm not sure about fuel-pressure. Is that
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