Hi.
Got it, thank you very much for your help.
I think i will try to increase pitch with the
"pitch_neutral_default" and see what happens.
Btw i am always learning, i didn't knew the cruise throttle
setting behavior as you described it, thank you again.
Chris
On 11/19/2013 08:20 PM, Loic Drumettaz wrote:
Hi,
If you want to reduce speed without using an airspeed sensor,
the easiest is to set nominal pitch using pitch_neutral_default
in the airframe configuration.
This will offset the measured pitch.
You can tune pitch_neutral in flight by adding
settings/estimation/ins_neutrals.xml in paparazzi center.
Constant airspeed in level flight is then obtained with accurate
(no static error) attitude pitch loop.
nominal_cruise_ throttle is a preset of thrust which is
corrected by auto throttle loop. Reduce it will only increase
the airplane altitude error, but won't help to reduce speed ( at
least in steady flight)
Loic
Le 19 nov. 2013 16:41, "Chris" <
address@hidden>
a écrit :
Hi.
I was thiniking that if i want to make an airplane to go
slower could i use a higher angle of attack during flight thus
increasing lift (within the lowest drag envelope of course)?
If i am right what settings other than minimum cruise throttle
do i need or is possible to adjust?
I am asking because i have an airplane (the huge Cessna) that
can fly more than safely with 80km/h
and have significantly reduced drag but the autopilot gives it
a cruising speed of 110km/h even with low throttle (40%) and
at 3 degrees wing pitch during flight.
I am searching for those last bits that can decrease fuel
consumption to a minimum :-D
Chris
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