Hi,
Some months ago I began to model a Gyroflug Speedcanard SC-01B, a well-known
german canard-aircraft. (this one:
http://www.airliners.net/photo/Gyroflug-SC-01B-160-Speed/1389966/L/)
Very similar to the Long-EZ by Rutan, but the fuselage is from a Twin-Astir,
the airfoils by Eppler ( the exactly name I can give you, if you want). It has
a 160PS strong engine and flys like a jet.
My attempt to create a fdm was not successful: it always fell down, or spinned.
So I asked Oliver Predelli, (author of the Braunschweig scenery and some
YASIm-aircrafts) for help.
At least he had the same problems, but he managed to get a stable fdm- but the
perfomance was far away from realistic: it went never be faster than 90 kn
though it had an engine power of 4000 PS!
Some days ago I discovered the LongEZ by Helijah- but the fdm is "fake".
I got my hands on it and just changed the position of the canard and the main
wing, so it has canard config: The same behavior: spinning, slow though it had
enough power...
So it seems to me, that YASim is not be able to simulate this type of aircraft
correct. Am I right?
In the attachement you will find the fdm-file by Oliver in hope someone can
help.
Regards
HHS
still in work: http://www.hoerbird.net/galerie.html
But already done: http://www.hoerbird.net/reisen.html
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<airplane mass="1200 ">
<!--
Engine: 160 hp at 2700 rpm
empty weight: 435 kg = 960 pound
take off weight: 680 kg = 1500 pound
fuel capacity: 110 kg = 243 pound
takeoff at 120 km/h = 65 kn
climb rate at 150 km/h = 81 kn: 700 - 1000 ft/min
cruising speed at 75% throttle: 260 km/h = 140 kn
max speed: 360 km/h = 194 kn
during stall: nodding frequency 0.75 Hz, nodding angle +/- 10 deg
rudder in winglet is only working to the outside, pull-back with spring, right rudder to the right, left rudder to the left, right and left independent to each other
aileron in main wing
-->
<!-- Approach configuration -->
<approach speed="60" aoa="15">
<control-setting axis="/controls/engines/engine[0]/throttle" value="0.4"/>
<control-setting axis="/controls/gear/gear-down" value="1"/>
</approach>
<!-- Cruise configuration. -->
<cruise speed="150" alt="6000">
<control-setting axis="/controls/engines/engine[0]/throttle" value="0.75"/>
<control-setting axis="/controls/gear/gear-down" value="0"/>
</cruise>
<!-- pilot eyepoint -->
<cockpit x="1.0" y="0.0" z="0.6"/>
<!-- fuselage -->
<fuselage ax="2.6" ay="0" az="0" bx="-1.8" by="0" bz="0.46" width="0.8" taper="0.5" midpoint="0.5" cx="2" cy="2"/>
<!--The wing length is from tips to fuselage, including intakes. -->
<!-- Winglets reduce the efficient wing length by 20%, so the wing definition in YASIM is longer than real -->
<wing x="-0.4" y="0.4" z="0.2"
length="4.8"
chord="1.2"
incidence="-1.0"
twist="-1.0"
taper="0.6"
sweep="18"
dihedral="0.0"
effectiveness="1.5"
camber="0.1">
<stall aoa="20" width="10" peak="1.8"/>
<flap0 start="0.4" end="0.8" lift="1.7" drag="1.2"/>
<control-input axis="/controls/flight/aileron" control="FLAP0" split="true"/>
<control-input axis="/controls/flight/aileron-trim" control="FLAP0" split="true"/>
<control-output control="FLAP0" side="left" prop="/surface-positions/left-aileron-pos-norm"/>
<control-output control="FLAP0" side="right" prop="/surface-positions/right-aileron-pos-norm"/>
<control-speed control="FLAP0" transition-time="1"/>
</wing>
<hstab x="2.08" y="0.17" z="0.2"
length="2.0"
chord="0.9"
incidence="0.0"
taper="1.0"
sweep="0"
effectiveness="1.5"
camber="0.35">
<stall aoa="9" width="1" peak="3.0"/>
<flap0 start="0" end="1" lift="1.5" drag="1.5"/>
<control-input axis="/controls/flight/elevator" control="FLAP0" invert="true"/>
<control-input axis="/controls/flight/elevator-trim" control="FLAP0" invert="true"/>
<control-output control="FLAP0" prop="/surface-positions/elevator-pos-norm"/>
<control-speed control="FLAP0" transition-time="1"/>
</hstab>
<!-- left winglet -->
<vstab x="-2.12" y="4.1" z="0.0"
length="0.97"
chord="0.72"
taper="0.3"
sweep="0">
<stall aoa="15" width="14" peak="1.0"/>
<flap0 start="0.1" end="0.6" lift="1.7" drag="1.5"/>
<control-input axis="/controls/flight/rudder" control="FLAP0" invert="true"
src0="-1.0" src1="0.0"
dst0="-1.0" dst1="0.0"/>
<control-input axis="/controls/flight/rudder-trim" control="FLAP0" invert="true"/>
<control-output control="FLAP0" prop="/surface-positions/rudder-pos-norm"/>
</vstab>
<!-- right winglet -->
<vstab x="-2.12" y="-4.1" z="0.0"
length="0.97"
chord="0.72"
taper="0.3"
sweep="0">
<stall aoa="15" width="14" peak="1.0"/>
<flap0 start="0.1" end="0.6" lift="1.7" drag="1.5"/>
<control-input axis="/controls/flight/rudder" control="FLAP0" invert="true"
src0="0.0" src1="1.0"
dst0="0.0" dst1="1.0"/>
<control-input axis="/controls/flight/rudder-trim" control="FLAP0" invert="true"/>
<control-output control="FLAP0" prop="/surface-positions/rudder-pos-norm"/>
</vstab>
<propeller x="0.0" y="0.0" z="0.2"
mass="50" moment="10" radius="2.0"
cruise-power="3000" cruise-speed="150"
cruise-rpm="2000" cruise-alt="8000"
takeoff-power="4000" takeoff-rpm="2600"
contra="1">
<actionpt x="-2.0" y="0" z="0.4"/>
<piston-engine eng-power="4000" eng-rpm="2700" displacement="1462" compression="10" turbo-mul="1">
<control-input axis="/controls/engines/engine[0]/throttle" control="THROTTLE"/>
<control-input axis="/controls/engines/engine[0]/starter" control="STARTER"/>
<control-input axis="/controls/engines/engine[0]/magnetos" control="MAGNETOS"/>
<control-input axis="/controls/engines/engine[0]/mixture" control="MIXTURE"/>
</piston-engine>
</propeller>
<!-- gear nose -->
<gear x="2.07" y="0" z="-0.9"
retract-time="5"
compression="0.3">
<control-input axis="/controls/gear/gear-down" control="EXTEND"/>
<control-output control="EXTEND" prop="/gear/gear[0]/position-norm"/>
<control-speed control="EXTEND" transition-time="7"/>
<control-input axis="/controls/flight/rudder" control="STEER" square="true"
src0="-1.0" src1="1.0"
dst0="-0.5" dst1="0.5"/>
</gear>
<!-- left main -->
<gear x="-0.7" y="0.75" z="-0.9"
compression="0.2"
spring="0.8"
damp="3">
<control-input axis="/controls/gear/brake-left" control="BRAKE"/>
<control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
<control-speed control="BRAKE" transition-time="1"/>
</gear>
<!-- right main -->
<gear x="-0.7" y="-0.75" z="-0.9"
compression="0.2"
spring="0.8"
damp="3">
<control-input axis="/controls/gear/brake-right" control="BRAKE"/>
<control-input axis="/controls/gear/brake-parking" control="BRAKE"/>
<control-speed control="BRAKE" transition-time="1"/>
</gear>
<!-- left wing tank -->
<tank x="-1.0" y="0.2" z="0.25" jet="false" capacity="110"/>
<!-- right wing tank -->
<tank x="-1.0" y="-0.2" z="0.25" jet="false" capacity="110"/>
<!-- ballast -->
<ballast x="2.2" y="0.0" z="0.2" mass="360"/>
</airplane>
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