Quote:
Originally Posted by Hunin
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[Params]
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SpinCxLoss 0.06
SpinCyLoss 0.03
Vmin 170.0 kmh
Vmax 470.0 kmh
VmaxAllowed 750.0 kmh
VmaxH 560.0 kmh at 4500.0 m
VminFLAPS 130.0 kmh
VmaxFLAPS 250.0 kmh
Vz_climb 20.0 ms
V_climb 270.0 kmh
T_turn 25.0 sec
V_turn 340.0 kmh
K_max 13.0
FlapsMult 1.0
FlapsAngSh 10.0
RangeAbility 480 km
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I took a look at the figures above and compared it to my documentation. See the suggested values below:
?? means I have no idea what the figure is for..
Changes are marked with bold, with source given.
SpinCxLoss 0.06 ??
SpinCyLoss 0.03 ??
Vmin 170.0 kmh - should be 153.0 kmh -
[i] this is for a throttled down (~power off) engine as the UK Morgan report posted above. It needs to be found out what 'Vmin' means in the sim, since in real life, the stall speeds are about 10 mph lower when the engine is opened up (propeller helps the wings, relative airflow speed is higher than airspeed would indicate -> more lift). So if the other planes are using Power ON stall speeds, this should be not be used but a lower stall speed value.[i]
Vmax 470.0 kmh - Should be 520. Now a bit of a comment would be needed here.
Vmax for the 109E-3 with DB 601Aa should be 500 kph (see Baubeschreibung 109E graph posted above). This was achiavable with the 1,35ata rating 5-min (1045PS at SL) and guaranteed within 5%.
However I believe this figure (the 470 kph one) is to be achieved only by using all out boost in the sim, and that is what the testing shows: 470 can only be approached by using the 1-min WEP (W button), ie. 1,45ata. This latter translates to 1175 PS at SL...
If this is the case, the Vmax. should bet 500+, at around 515-520 kph (deducted as power requirements increase with the cube), achiavable in the sim w. the 1-min boost, and so that the proper max. speed (500) could be achieved with the 5-min 1,35ata/2400 rating.
VmaxAllowed 750.0 kmh - correct. Appearantly Il-2COD does not differentiate for dive limit changes with altitude.
VmaxH 560.0 kmh at 4500.0 m - should be 570 kph at 5000m, as per Baubescreibung curves
VminFLAPS 130.0 kmh -
this matches the UK Morgan/RAE report for 109E with flaps fully down
VmaxFLAPS 250.0 kmh - note: this is for fully deployed flaps, for example 20 degrees flaps were allowed up 500 km/h
Vz_climb 20.0 ms - its unclear what this is for, presumably initial climb rate. If so, probably correct if it's understood with 1-minute WEP; if meant for 5 minute rating, too high IMHO. This is based on analysis of German, French and British measurements, and the 109E Baubescreibung.
V_climb 270.0 kmh - should be 250 km/h, as per the Emil 1939 short manual.
This might be significant as it will result in steeper climbs, a working tactic described by UK evaluations for the 109E.
T_turn 25.0 sec - should be around 18-18.92 sec for SL, as discussed above.
V_turn 340.0 kmh - this needs to be re-calculated I think due to the previous change.
K_max 13.0 - ?? No idea what these last three are for..
FlapsMult 1.0
FlapsAngSh 10.0
RangeAbility 480 km - Should be 665 km?
This is probably for range, but its entirely unclear to what altitude and engine setting this should be true. Developer would be needed to comment on this.. In any case, German range tables give economic cruising range at 650 - 665 km for the Emil, pretty irrespective of altitude (different engine setups were, however, required, ie. pitch, rpm, boost etc.).