Vaysa, it's rather strange because I worked quite a lot on the FM of this plane , in order to enable it to take off with maximal charge (torpedo or M bomb).
I have checked once again this morning on 4.122. The problem you have may be due to not following the procedure needed to have such seaplanes take off:
1) raise the throttle to 40%.
2) WAIT till the wake becomes really wide and the plane begins to move up to a speed 11-12 km/h
3) apply right aileron very strongly and push progressively the throttle to 70% - You must get a straight course. As soon as your plane is on a straight course, speed will build up and you can release the pressure on the right aileron
4) push throttle forward (no need to get even at max throttle, even 80% or 90% is enough to get over 100kmh)
5) at 100kmh begin to pull your stick and your plane takes off smoothly, even at full charge
I can take off from the water
using the elevator trim.
I also adjusted the rudder trim and the plane does not pull at the propeller torque.
I tried to paint a polar according to your calculations.
But in the figure, different numbers are obtained.
lineCyCoeff 0.103
AOAMinCx_Shift 1.3
Cy0_0 0.213
AOACritH_0 20.0
AOACritL_0 -18.0
CyCritH_0 1.3731587
CyCritL_0 -0.80639166
CxMin_0 0.034 // 0.033
parabCxCoeff_0 4.8E-4
Cy0_1 0.213
AOACritH_1 20.0
AOACritL_1 -18.0
CyCritH_1 1.3731587
CyCritL_1 -0.80639166
CxMin_1 0.034
parabCxCoeff_1 4.8E-4
parabAngle 5.0
Decline 0.010
maxDistAng 40.0
draw_graphs 0
Not everything works out as you want. I'm just an amateur.
I have not found a table or picture of the polar for this biplane on the Internet, so my construction is only from the field of guesses and assumptions.
Also, your motor produces only 357 hp.
A three-blade propeller with a diameter of 3.1 - 3.2 meters can take off close to 0.70 - 0.73 motor power. So it seems to me.
Therefore, the propeller removes 574.9 hp from me. from the Hispano-Suiza-12Nb motor. And the model 15 develops 205 km. per hour near the ground at 17 degrees on the map of Smolensk.
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Topic: Levasseur PL15 (Read 10201 times)
