Hallo Andrej,
auf welche Daten kommst du denn?
Ich komme auf diese
Dragonfly 67dm² - ~2200g
B40 9L 4,4:1 18,5x12
Motor: Hacker B40 9L; 3333rpm/V; 0,0143 Ohms; 1,7A idle.
Battery: Sanyo HR-4/5FAUP; 7 cells; 1800mAh @ 1,2V; 0,004 Ohms/cell.
Drive System: 18,5x12 (Pconst=1; Tconst=1,03) geared 4,4:1.
Airframe: 67dm²; 2189g; 32,7g/dm²; Cd=0,04; Cl=0,43; Clopt=0,78; Clmax=1,08.
Stats: 180 W/kg in; 139 W/kg out; 7,5m/s stall; 8,8m/s
Steigen 6,91m/s @ 51,8°; Sinken -0,6m/s @ -3,9°.
Batt Amps = 60,6
Motor Amps = 60,6
Motor Volts = 6,5
Input (W) = 395,1
Output (W) = 304,1
Loss (W) = 91,0
Motor Ef(%) = 77,0
Motor RPM = 17214
Prop RPM = 3912
Thrust (g) = 2334
PSpd (m/s) = 19,9
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.
.
der Hacker ist mit dem FUN480-33 4,4:1 fast identisch (nur mal so am Rande...)
Motor: Kontronik Fun 480-33 (12V); 3300rpm/V; 0,014 Ohms; 1,7A idle.
Battery: Sanyo HR-4/5FAUP; 7 cells; 1800mAh @ 1,2V; 0,004 Ohms/cell.
Drive System: 18,5x12 (Pconst=1; Tconst=1,03) geared 4,4:1.
Airframe: 67dm²; 2188g; 32,7g/dm²; Cd=0,04; Cl=0,43; Clopt=0,78; Clmax=1,08.
Stats: 180 W/kg in; 140 W/kg out; 7,5m/s stall; 8,8m/s
Steigen 6,96m/s @ 52,3°; Sinken -0,6m/s @ -3,9°.
Batt Amps = 60,3
Motor Amps = 60,3
Motor Volts = 6,5
Input (W) = 393,7
Output (W) = 306,3
Loss (W) = 87,4
Motor Ef(%) = 77,8
Motor RPM = 17257
Prop RPM = 3922
Thrust (g) = 2346
PSpd (m/s) = 19,9
soweit die Theorie
[ 27. Dezember 2004, 10:38: Beitrag editiert von: Robert G. ]