Antriebsberechnungen für Lift OFF (ohne Gewähr)

 

Da ich selber keinen Lift Off besitze, aber immer wieder gelesen habe: welcher Antrieb??,  habe ich mal zu rechnen angefangen.

Flächengröße wurde mit 35 dm² und Profil RG14 zugrunde gelegt. Bei anderen Vorgaben ändern sich die gerechneten Werte geringfügig.

 

ACHTUNG: auf Drehzahlfestigkeit und Beschädigungen der Luftschraube achten.

 

Bei einem Opus ca. 2,3kg mit 18 Zellen, ca. 70A  = ca. 1200 Watt, hat´s einen furchtbaren Knall gegeben.

Der Rumpf wurde hinter dem Motorspant abgerissen.

Ursache: ein Luftschraubenblatt ist gerissen. Die dadurch entstehende Unwucht hat der Rumpf natürlich nicht ausgehalten.

 

 

 

 

Motor: Kontronik Fun 500-27 (12V); 2770rpm/V; 0,0158 Ohms; 2A idle.

Battery: Sanyo 1700SCR; 10 cells; 1700mAh @ 1,2V; 0,004 Ohms/cell.

Speed Control: On/Off Switch; 0,003 Ohms; High rate.

Drive System: 17x13 (Pconst=1,12; Tconst=1,3) geared 5,2:1.

Airframe: Lift OFF; 32dm²; 1979g; 61,8g/dm²; Cd=0,037; Cl=0,19; Clopt=0,64; Clmax=0,94.

Stats: 255 W/kg in; 218 W/kg out; 11m/s stall; 13,4m/s opt @ 45% (27:22); 24,5m/s level @ 80% (7:56); 13,73m/s @ 90°; -1,13m/s @ -4,8°.

 

AirSpd (m/s) = 0,0

Drag (g) = 0

Lift (g) = 0

Batt Amps = 51,7

Motor Amps = 51,7

Motor Volts = 9,8

Input (W) = 505,2

Output (W) = 431,0

Loss (W) = 74,2

Temp (°C) = 98,3

Motor Ef(%) = 85,3

Motor RPM = 24037

Elect Ef(%) = 69,5

Prop RPM = 4623

Thrust (g) = 2754           Standschub

PSpd (m/s) = 25,4         Luftgeschwindigkeit am Prop – im Stand

Prop Ef(%) = 0,0

Total Ef(%) = 0,0

Time (m:s) = 1:58          Laufzeit bei Steigen von 13,73m/s mit 90°

 

 

 

 

Motor: Kontronik Fun 500-27 (12V); 2770rpm/V; 0,0158 Ohms; 2A idle.

Battery: Sanyo 1700SCR; 14 cells; 1700mAh @ 1,2V; 0,004 Ohms/cell.

Speed Control: On/Off Switch; 0,003 Ohms; High rate.

Drive System: 15x10 (Pconst=1,12; Tconst=1,3) geared 5,2:1.

Airframe: Lift OFF; 32dm²; 2193g; 68,5g/dm²; Cd=0,037; Cl=0,19; Clopt=0,64; Clmax=0,94.

Stats: 321 W/kg in; 284 W/kg out; 11,6m/s stall; 14,1m/s opt @ 47% (29:16); 25,8m/s level @ 83% (9:16); 16,23m/s @ 90°; -1,19m/s @ -4,8°.

 

AirSpd (m/s) = 0,0

Drag (g) = 0

Lift (g) = 0

Batt Amps = 51,2

Motor Amps = 51,2

Motor Volts = 13,8

Input (W) = 705,6

Output (W) = 622,5

Loss (W) = 83,1

Temp (°C) = 107,4

Motor Ef(%) = 88,2

Motor RPM = 35041

Elect Ef(%) = 72,4

Prop RPM = 6739

Thrust (g) = 3407

PSpd (m/s) = 28,5

Prop Ef(%) = 0,0

Total Ef(%) = 0,0

Time (m:s) = 2:00

 

 

 

 

Motor: Kontronik Fun 500-27 (12V); 2770rpm/V; 0,0158 Ohms; 2A idle.

Battery: Sanyo 1700SCR; 16 cells; 1700mAh @ 1,2V; 0,004 Ohms/cell.

Speed Control: On/Off Switch; 0,003 Ohms; High rate.

Drive System: 14x10 (Pconst=1,12; Tconst=1,3) geared 5,2:1.

Airframe: Lift OFF; 32dm²; 2300g; 71,9g/dm²; Cd=0,037; Cl=0,19; Clopt=0,64; Clmax=0,94.

Stats: 353 W/kg in; 314 W/kg out; 11,9m/s stall; 14,5m/s opt @ 41% (35:42); 26,4m/s level @ 74% (9:21); 17,3m/s @ 90°; -1,22m/s @ -4,8°.

 

AirSpd (m/s) = 0,0

Drag (g) = 0

Lift (g) = 0

Batt Amps = 51,6

Motor Amps = 51,6

Motor Volts = 15,7

Input (W) = 812,3

Output (W) = 723,1

Loss (W) = 89,2

Temp (°C) = 113,7

Motor Ef(%) = 89,0

Motor RPM = 40385

Elect Ef(%) = 73,0

Prop RPM = 7766

Thrust (g) = 3505

PSpd (m/s) = 32,9

Prop Ef(%) = 0,0

Total Ef(%) = 0,0

Time (m:s) = 1:59

 

 

 

 

Motor: Kontronik Fun 500-48 (12V); 4885rpm/V; 0,005 Ohms; 4A idle.

Battery: Sanyo 1700SCR; 10 cells; 1700mAh @ 1,2V; 0,004 Ohms/cell.

Speed Control: On/Off Switch; 0,003 Ohms; High rate.

Drive System: 14x10 (Pconst=1,12; Tconst=1,3) geared 5,2:1.

Airframe: Lift OFF; 32dm²; 1979g; 61,8g/dm²; Cd=0,037; Cl=0,19; Clopt=0,64; Clmax=0,94.

Stats: 353 W/kg in; 314 W/kg out; 11m/s stall; 13,4m/s opt @ 37% (23:00); 24,5m/s level @ 66% (6:44); 16,97m/s @ 90°; -1,13m/s @ -4,8°.

 

AirSpd (m/s) = 0,0

Drag (g) = 0

Lift (g) = 0

Batt Amps = 83,0

Motor Amps = 83,0

Motor Volts = 8,4

Input (W) = 700,0

Output (W) = 621,2

Loss (W) = 78,8

Temp (°C) = 103,0

Motor Ef(%) = 88,7

Motor RPM = 38391

Elect Ef(%) = 62,3

Prop RPM = 7383

Thrust (g) = 3168

PSpd (m/s) = 31,3

Prop Ef(%) = 0,0

Total Ef(%) = 0,0

Time (m:s) = 1:14

 

 

 

 

Motor: Kontronik Fun 500-48 (12V); 4885rpm/V; 0,005 Ohms; 4A idle.

Battery: Sanyo 1700SCR; 12 cells; 1700mAh @ 1,2V; 0,004 Ohms/cell.

Speed Control: On/Off Switch; 0,003 Ohms; High rate.

Drive System: 13x8 (Pconst=1,12; Tconst=1,3) geared 5,2:1.

Airframe: 32dm²; 2086g; 65,2g/dm²; Cd=0,037; Cl=0,19; Clopt=0,64; Clmax=0,93.

Stats: 390 W/kg in; 351 W/kg out; 11,4m/s stall; 13,7m/s opt @ 41% (24:27); 25,2m/s level @ 74% (7:08); 17,98m/s @ 90°; -1,14m/s @ -4,8°.

 

AirSpd (m/s) = 0,0

Drag (g) = 0,0

Lift (g) = 0,0

Batt Amps = 78,2

Motor Amps = 78,2

Motor Volts = 10,4

Input (W) = 813,9

Output (W) = 731,9

Loss (W) = 82,0

Temp (°C) = 106,3

Motor Ef(%) = 89,9

Motor RPM = 48216

Elect Ef(%) = 65,0

Prop RPM = 9272

Thrust (g) = 3532

PSpd (m/s) = 31,4

Prop Ef(%) = 0,0

Total Ef(%) = 0,0

Time (m:s) = 1:18

 

 

 

 

Motor: Kontronik Fun 500-48 (12V); 4885rpm/V; 0,005 Ohms; 4A idle.

Battery: Sanyo 1700SCR; 14 cells; 1700mAh @ 1,2V; 0,004 Ohms/cell.

Speed Control: On/Off Switch; 0,003 Ohms; High rate.

Drive System: 12x8 (Pconst=1,12; Tconst=1,3) geared 5,2:1.

Airframe: 32dm²; 2193g; 68,5g/dm²; Cd=0,037; Cl=0,19; Clopt=0,64; Clmax=0,93.

Stats: 435 W/kg in; 394 W/kg out; 11,7m/s stall; 14,1m/s opt @ 36% (26:40); 25,8m/s level @ 64% (8:04); 19,04m/s @ 90°; -1,17m/s @ -4,8°.

 

AirSpd (m/s) = 0,0

Drag (g) = 0,0

Lift (g) = 0,0

Batt Amps = 78,4

Motor Amps = 78,4

Motor Volts = 12,2

Input (W) = 954,8

Output (W) = 864,1

Loss (W) = 90,7

Temp (°C) = 115,3

Motor Ef(%) = 90,5

Motor RPM = 56698

Elect Ef(%) = 65,6

Prop RPM = 10904

Thrust (g) = 3642

PSpd (m/s) = 36,9

Prop Ef(%) = 0,0

Total Ef(%) = 0,0

Time (m:s) = 1:18

 

 

 

 

Motor: Kontronik Fun 600-32 (12V); 3250rpm/V; 0,0056 Ohms; 4A idle.

Battery: Sanyo 1700SCR; 10 cells; 1700mAh @ 1,2V; 0,004 Ohms/cell.

Speed Control: On/Off Switch; 0,003 Ohms; High rate.

Drive System: 15x13 (Pconst=1,12; Tconst=1,3) geared 4,3:1.

Airframe: Lift OFF; 32dm²; 2027g; 63,3g/dm²; Cd=0,037; Cl=0,19; Clopt=0,64; Clmax=0,94.

Stats: 333 W/kg in; 295 W/kg out; 11,2m/s stall; 13,6m/s opt @ 34% (24:11); 24,8m/s level @ 60% (7:02); 16,3m/s @ 90°; -1,14m/s @ -4,8°.

 

AirSpd (m/s) = 0,0

Drag (g) = 0

Lift (g) = 0

Batt Amps = 78,2

Motor Amps = 78,2

Motor Volts = 8,6

Input (W) = 675,5

Output (W) = 598,3

Loss (W) = 77,2

Temp (°C) = 90,8

Motor Ef(%) = 88,6

Motor RPM = 26201

Elect Ef(%) = 63,7

Prop RPM = 6093

Thrust (g) = 2981

PSpd (m/s) = 33,5

Prop Ef(%) = 0,0

Total Ef(%) = 0,0

Time (m:s) = 1:18

 

 

 

 

Motor: Kontronik Fun 600-32 (12V); 3250rpm/V; 0,0056 Ohms; 4A idle.

Battery: Sanyo 1700SCR; 14 cells; 1700mAh @ 1,2V; 0,004 Ohms/cell.

Speed Control: On/Off Switch; 0,003 Ohms; High rate.

Drive System: 14x8 (Pconst=1,12; Tconst=1,3) geared 4,3:1.

Airframe: Lift OFF; 32dm²; 2241g; 70g/dm²; Cd=0,037; Cl=0,19; Clopt=0,64; Clmax=0,94.

Stats: 420 W/kg in; 379 W/kg out; 11,7m/s stall; 14,3m/s opt @ 47% (20:44); 26,1m/s level @ 83% (7:16); 19,55m/s @ 90°; -1,2m/s @ -4,8°.

 

AirSpd (m/s) = 0,0

Drag (g) = 0

Lift (g) = 0

Batt Amps = 76,7

Motor Amps = 76,7

Motor Volts = 12,3

Input (W) = 941,7

Output (W) = 849,4

Loss (W) = 92,3

Temp (°C) = 104,3

Motor Ef(%) = 90,2

Motor RPM = 37957

Elect Ef(%) = 65,9

Prop RPM = 8827

Thrust (g) = 4185

PSpd (m/s) = 29,9

Prop Ef(%) = 0,0

Total Ef(%) = 0,0

Time (m:s) = 1:20

 

 

 

 

 

Motor: Kontronik Fun 600-32 (12V); 3250rpm/V; 0,0056 Ohms; 4A idle.

Battery: Sanyo 1700SCR; 16 cells; 1700mAh @ 1,2V; 0,004 Ohms/cell.

Speed Control: On/Off Switch; 0,003 Ohms; High rate.

Drive System: 14x8 (Pconst=1,12; Tconst=1,3) geared 4,3:1.

Airframe: Lift OFF; 32dm²; 2348g; 73,4g/dm²; Cd=0,037; Cl=0,19; Clopt=0,64; Clmax=0,94.

Stats: 498 W/kg in; 449 W/kg out; 12m/s stall; 14,6m/s opt @ 42% (24:11); 26,7m/s level @ 75% (7:52); 22,72m/s @ 90°; -1,23m/s @ -4,8°.

 

AirSpd (m/s) = 0,0

Drag (g) = 0

Lift (g) = 0

Batt Amps = 88,1

Motor Amps = 88,1

Motor Volts = 13,3

Input (W) = 1171,4

Output (W) = 1055,9

Loss (W) = 115,5

Temp (°C) = 124,9

Motor Ef(%) = 90,1

Motor RPM = 40812

Elect Ef(%) = 62,4

Prop RPM = 9491

Thrust (g) = 4838

PSpd (m/s) = 32,1

Prop Ef(%) = 0,0

Total Ef(%) = 0,0

Time (m:s) = 1:09

 

 

 

 

 

Motor: Kontronik Fun 600-32 (12V); 3250rpm/V; 0,0056 Ohms; 4A idle.

Battery: Sanyo 1700SCR; 20 cells; 1700mAh @ 1,2V; 0,004 Ohms/cell.

Speed Control: On/Off Switch; 0,003 Ohms; High rate.

Drive System: 12x8 (Pconst=1,12; Tconst=1,3) geared 4,3:1.

Airframe: Lift OFF; 32dm²; 2562g; 80g/dm²; Cd=0,037; Cl=0,19; Clopt=0,64; Clmax=0,94.

Stats: 550 W/kg in; 502 W/kg out; 12,5m/s stall; 15,3m/s opt @ 34% (29:02); 27,9m/s level @ 60% (9:05); 23,37m/s @ 90°; -1,28m/s @ -4,8°.

 

AirSpd (m/s) = 0,0

Drag (g) = 0

Lift (g) = 0

Batt Amps = 82,1

Motor Amps = 82,1

Motor Volts = 17,2

Input (W) = 1411,3

Output (W) = 1287,4

Loss (W) = 123,9

Temp (°C) = 132,4

Motor Ef(%) = 91,2

Motor RPM = 53550

Elect Ef(%) = 65,3

Prop RPM = 12453

Thrust (g) = 4751

PSpd (m/s) = 42,2

Prop Ef(%) = 0,0

Total Ef(%) = 0,0

Time (m:s) = 1:15

 

 

 

 

 

Motor: Kontronik Fun 600-18 (12V); 1840rpm/V; 0,017 Ohms; 1A idle.

Battery: Sanyo 1700SCR; 16 cells; 1700mAh @ 1,2V; 0,004 Ohms/cell.

Speed Control: On/Off Switch; 0,003 Ohms; High rate.

Drive System: 16x13 (Pconst=1,12; Tconst=1,3) geared 4,3:1.

Airframe: Lift OFF; 32dm²; 2348g; 73,4g/dm²; Cd=0,037; Cl=0,19; Clopt=0,64; Clmax=0,94.

Stats: 365 W/kg in; 329 W/kg out; 12m/s stall; 14,6m/s opt @ 37% (42:14); 26,7m/s level @ 66% (11:01); 18,88m/s @ 90°; -1,23m/s @ -4,8°.

 

AirSpd (m/s) = 0,0

Drag (g) = 0

Lift (g) = 0

Batt Amps = 55,3

Motor Amps = 55,3

Motor Volts = 15,5

Input (W) = 857,4

Output (W) = 773,5

Loss (W) = 83,9

Temp (°C) = 96,8

Motor Ef(%) = 90,2

Motor RPM = 26189

Elect Ef(%) = 72,8

Prop RPM = 6091

Thrust (g) = 3805

PSpd (m/s) = 33,5

Prop Ef(%) = 0,0

Total Ef(%) = 0,0

Time (m:s) = 1:51

 

 

 

 

 Motor: Kontronik Fun 600-18 (12V); 1840rpm/V; 0,017 Ohms; 1A idle.
Battery: Sanyo 1700SCR; 20 cells; 1700mAh @ 1,2V; 0,004 Ohms/cell.
Speed Control: On/Off Switch; 0,003 Ohms; High rate.
Drive System: 16x10 (Pconst=1,12; Tconst=1,3) geared 4,3:1.
Airframe: 32dm²; 2562g; 80g/dm²; Cd=0,037; Cl=0,19; Clopt=0,64; Clmax=0,93.
Stats: 458 W/kg in; 412 W/kg out; 12,6m/s stall; 15,2m/s opt @ 44% (42:03); 27,9m/s level @ 80% (10:51); 22,7m/s @ 90°; -1,26m/s @ -4,8°.

AirSpd (m/s) = 0,0
Drag (g) = 0
Lift (g) = 0
Batt Amps = 62,3
Motor Amps = 62,3
Motor Volts = 18,8
Input (W) = 1173,2
Output (W) = 1056,9
Loss (W) = 116,3
Temp (°C) = 125,7
Motor Ef(%) = 90,1
Motor RPM = 31717
Elect Ef(%) = 70,7
Prop RPM = 7376
Thrust (g) = 5168
PSpd (m/s) = 31,2
Prop Ef(%) = 0,0
Total Ef(%) = 0,0
Time (m:s) = 1:38
 

 

 

 

Motor: Kontronik Fun 600-18 (12V); 1840rpm/V; 0,017 Ohms; 1A idle.

Battery: Sanyo 1700SCR; 20 cells; 1700mAh @ 1,2V; 0,004 Ohms/cell.

Speed Control: On/Off Switch; 0,003 Ohms; High rate.

Drive System: 16x13 (Pconst=1,12; Tconst=1,3) geared 5,2:1.

Airframe: Lift OFF; 32dm²; 2562g; 80g/dm²; Cd=0,037; Cl=0,19; Clopt=0,64; Clmax=0,94.

Stats: 403 W/kg in; 371 W/kg out; 12,5m/s stall; 15,3m/s opt @ 37% (46:01); 27,9m/s level @ 66% (11:55); 20,97m/s @ 90°; -1,28m/s @ -4,8°.

 

AirSpd (m/s) = 0,0

Drag (g) = 0

Lift (g) = 0

Batt Amps = 52,6

Motor Amps = 52,6

Motor Volts = 19,6

Input (W) = 1033,0

Output (W) = 952,2

Loss (W) = 80,8

Temp (°C) = 94,0

Motor Ef(%) = 92,2

Motor RPM = 33943

Elect Ef(%) = 75,4

Prop RPM = 6528

Thrust (g) = 4371

PSpd (m/s) = 35,9

Prop Ef(%) = 0,0

Total Ef(%) = 0,0

Time (m:s) = 1:56

 

 

Hab ich von einem RCline-User bekommen

 

-----Ursprüngliche Nachricht-----
Von: T. R.
Gesendet: Montag, 3. März 2003 22:46
An: 'RGreissel'
Betreff: Hallo, mal wieder!

 

Hallo Robert,

 

lange ist es her, aber jetzt melde ich mich mal wieder. Wenn Du mit meinem Namen nichts mehr anfangen kannst, dann helfe ich Dir kurz. Ich bin der vom RCline-Forum mit der Hotliner-Antriebsauslegung, alles klar?

Nach langem Überlegen habe ich mich doch für den Fun 600-18 entschieden. Ich konnte einen günstigen bei eBay mit dem 4,4:1 Getriebe ersteigern. Zuerst bin ich den Lift off mit meinen vorhandenen 16 Zellen  von Typ 4/5 RC geflogen, was schon mächtig abgeht. Der Flieger steigt deutlich besser als die anderen 10 Zellen und 70 Ampere Antriebe in unserem Verein und hat beim Heizen, durch das höhere Gewicht, einen super Durchzug, echt klasse. Beim Landen macht sich dann aber die höhere Masse wiederum negativ bemerkbar. Na ja, man kann nicht alles haben. In der Zwischenzeit hat sich ein Vereinskollege, nach dem Absturz seiner Maschine, von seinem Schulze Regler und 20 gepushten Zellen getrennt und mir diese recht günstig überlassen. Mit dieser Antriebskonfiguration bin ich letzte Woche zum ersten Mal geflogen und war geplättet. Der Antrieb entspricht jetzt Deiner vorletzten Auslegung und ist wohl das Maximum was man dem Flieger leistungsmäßig zumuten kann. ECHT GEIL!!!! Ich wollte Dir unbedingt davon berichten, da Du ja so viel Zeit in die Antriebsauslegung investiert hast.

 

Nochmals vielen Dank,