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America's Best Choice for RC Electric Jets, Airplanes, and Accessories

50-70mm Set Up Guide

There are many combinations and set ups that will work for electric powered aircraft.  Here are some formulas that will make it easy for you to determine what the proper set up will be for a jet.


To calculate your fan rpm's: Take the voltage of the battery and multiply the KV of the motor = Fan RPM
                                                                   11.1v X 3600= 39,960 rpm.

To calculate what KV motor you need: Take the desired fan RPM divide it by the battery voltage= Needed Motor KV
                                                                   45,000/ 14.8v=3040kv motor.

To calculate what battery you need: Take desired fan RPM divide it by the motor kv = Battery Size
                                                                   45,000/ 3600kv=12.5v (3 cell).

To calculate approximate amps drawn: Take watts divide it by the volts = Amps
                                                                   800 watts/ 14.8v=54amps.

To calculate volts needed: Take watts divide it by the amps = volts
                                                                   450 watts/ 40amps= 11.25volts.

To calculate watts: Take amps multiply it by volts = Watts
                                                                   57amps X 14.8v= 843watts.

These are approximate numbers depending on efficiency, quality of connections, and resistance, but this guide line will help determine what set up to use with electrics.  The data below are estimations based on the above formulas and information provided by the manufacturer.  Fan Jets USA is not responsible for changes in the specifications of the motors by the manufacturer.


The following are recommended setups for edf units based on fan rpm's. The higher the fan rpm, the faster the jet.  Please note that most 50-70mm fans are rated up to 50,000 rpm.  Any thing above this, may exceed the manufacturers recommendations.  The one exception would the Tornado EDF Units that are rated up to 70,000 rpm. Speeds vary based on the weight and aerodynamics of the jet.  

Be sure to use a watt meter when programming the power system to check watt and amp draw. This can be limited by adjusting the throttle epa's. Going up in blade count will have an impact on watt and amp draw. Generally a lower kv motor should be used on edf's that have higher blade counts.


COLOR CODE (Estimations): ORANGE= MILD SETUP
                                         
GREEN= MODERATE SETUP
                                          RED= WILD/EXTREME SETUP

FAN RPM

MOTOR: 50MM CLASS  LI-PO BATTERY:
25C OR HIGER
 
SPEED CONTROL 
34,560
53,280
HET 240-15-4800 2 CELL
3 CELL
30 AMP
30 AMP
44,400
66,600
HET 240-15-6000 2 CELL
3 CELL
30 AMP
30 AMP
48,840 RC LANDER 4400KV 3 CELL 20 AMP
51,000 RC LANDER 4600KV 3 CELL 20 AMP

FAN RPM 

MOTOR: 64MM CLASS  LI-PO BATTERY:
25C OR HIGER
  
SPEED CONTROL 
41,070
54,760
EPF HOBBIES MERCURY
64mm 3700kv
3 CELL
4 CELL

60 AMP
60 AMP

52,170
69,560
 EPF HOBBIES MERCURY
64mm 4700
3 CELL
4 CELL
80 AMP
80 AMP
48,840 RC Lander 3300kv
64mm EDF FAN
4 CELL 75 AMP
59,200 RC LANDER 4000KV
64MM METAL FAN
4 CELL 50 AMP
43,290
57,720
RC Lander 3900kv
64mm METAL FAN
3 CELL
4 CELL
70 AMP
50 AMP
63,640 RC Lander 4300kv
64mm METAL FAN
4 CELL 50 AMP
       
 FAN RPM  MOTOR: 70MM CLASS  LI-PO BATTERY:
25C OR HIGER
 SPEED CONTROL
39,738
52.984
ARC 28-38-2 3 CELL
4 CELL
50 AMP
50 AMP
45,288
60,384
ARC 28-48-1 3 CELL
4 CELL
60 AMP
60 AMP
31,080
41,400
ARC 28-48-1.5 3 CELL
4 CELL
50 AMP
50 AMP
33,300
41,625
49,950
ARC 28-48-2 4 CELL
5 CELL
6 CELL
50 AMP
50 AMP
50 AMP
34,410
45,880
57,350
ARC 28-58-1 3 CELL
4 CELL
5 CELL
75 AMP
 75 AMP
75 AMP
48,840
EPF HOBBIES MERCURY
74MM 2200KV
6 CELL
75 AMP
 44,400  EPF HOBBIES MERCURY
74MM 3000KV
4 CELL
80 AMP
48,840
65,120
HET 1W-30 3 CELL
4 CELL
130 AMP
100 AMP
51,060 HET 2W 3 CELL 50 AMP
40,515
54,020
HET 2W-18 3 CELL
4 CELL
75 AMP
60 AMP

37,740
50,320

HET 2W-20 3 CELL
4 CELL
75 AMP
50 AMP
45,880
HET 2W-22
4 CELL
60 AMP
46,610 HET 2W-23 5 CELL 76 AMP
60,384 HET 2W-25 6 CELL 70 AMP
33,560
44,700
HET 3W 3 CELL
4 CELL
50 AMP
40 AMP
24,975
33,300
HET 4W 3 CELL
4 CELL
50 AMP
40 AMP
48,840 JP HOBBY 70MM
TWIN 2200KV
6 CELL
2X 100 AMP
49,500
 JP HOBBY 70MM
2250KV
6 CELL
100 AMP
44,400
JP HOBBY 70MM
3000KV
4 CELL
75 AMP
44,400 RC LANDER 3000KV
10 BLADE DPS
4 CELL
80 AMP
47,360 RC LANDER
3200KV EDF FAN
4 CELL 55 AMP
52,910 RC LANDER
3575KV METAL FAN
4 CELL 50 AMP
52,984 RC Lander 3580kv 68mm
Dynamic Power Series
4 CELL 70 AMP
57,720 RC LANDER 11 BLADE
3900KV METAL FAN
4 CELL 80 AMP
59,200 RC LANDER
4000KV METAL FAN
 
4 CELL 70 AMP
48,507 RC Lander
4370 KV Metal Fan
 
3 CELL 70 AMP
56,610 RC Lander 2550kv 72MM
Dynamic Power Series
6 CELL 65 AMP
39,516
52,688
Tenshock 1520/12T 3560kv
3 CELL
4 CELL
60 AMP
60 AMP
 49,284 Tenshock 1520/13T 3330kv
4 CELL
50 AMP
45,732
57,165
Tenshock 1520/14T 3090kv
4 CELL
5 CELL
50 AMP
50 AMP
44,585
53,502
Tenshock 1520/18T 2410kv
5 CELL
6 CELL
40 AMP
40 AMP
43,845
58,460
Tenshock 1530/7T 3950kv
3 CELL
4 CELL
100 AMP
100 AMP
51,504
Tenshock 1530/8T 3480kv
4 CELL
75 AMP
45,880
57,350
Tenshock 1530/9T 3100kv
4 CELL
5 CELL
70 AMP
70 AMP


70 mm
MOTOR

 PLANE WEIGHT  DIAMETER  LENGTH  SHAFT DIAM.  BATTERY
(LI-PO)
 NO LOAD CURRENT (IO)  INTERNAL RESISTANCE  KV  MAX CURRENT  NOMINAL POWER
Arc
28-38-2 
N/A  28 MM 37 MM   3.17 MM 3-4 CELL 1.7 A   0.029  3580  45 A 300 WATTS 
 ARC
28-48-1
N/A  28 MM 47 MM   3.17 MM 3-4 CELL  2.8 A  0.009   4080  60 A  500 WATTS
ARC
28-48-1.5 
N/A  28 MM 47 MM  3.17 MM  3-4 CELL  1.6 A  N/A   2800  50 A 400 WATTS 
ARC
28-47-2
 
N/A  28 MM 47 MM  3.17 MM  3-5 CELL  1.2 A  N/A  2250  50 A  500  WATTS 
 ARC
28-58-1
 N/A 28 MM  58 MM 3.17 MM  3-4 CELL  N/A  N/A   3100 75 A  450 WATTS 
HACKER
A30-14M DF
 N/A 35 MM  62 MM 3.17MM  2-4 CELL  N/A  N/A  3500   N/A  N/A
HACKER
A30-18M DF
 N/A 35 MM  62 MM 3.17  2-4 CELL N/A N/A  2900  N/A N/A

HET 1W-30 

UP TO 1600 G 

28 MM

 53 MM

3.17 MM 

3-4 CELL 

5.5 A 

4.5 

 4400

120 A 

1400
4 CELLS 

HET 2W  UP TO 1300 G  28 MM  38 MM  3.17 MM  3 CELL 1.94 A 0.013   4600 50 A  450 WATTS 
HET 2W-18  UP TO 1300 G 28 MM 43 MM 3.17 MM 3-4 CELL 2.6 A 0.014 3650 75 A 750 WATTS
HET 2W-20   UP TO 1300 G

28 MM

 43 MM  3.17 MM

3-4 CELL

 1.72 A  0.015  3400  60 A  700 WATTS
 HET 2W-25 UP TO 1600 G  28 MM  48 MM  3.17 MM  6 CELL  2.2 A  0.015  2720  70 A  1100 WATTS
(6 CELLS)
HET 3W  UP TO 1300 G

28 MM

 38 MM  3.17 MM  3-4 CELL 1.2 A 0.028  3020  35 A  450 WATTS
HET  4W UP TO 1300 G 

28 MM

38 MM  3.17 MM  3-4 CELL 1.94 A 0.013  2250  30 A  450 WATTS
MIGHTY MITE  1020 G 25.4 MM 68.3 MM 3 MM 3-4 CELL 4 A 0.021  4620  42 A 650 WATTS 
 SAP 2842 MB-1 1300-1900 G  28.5 MM 47 MM 4 MM  3-4 CELL 2.8 A N/A  3200  80A; 20 SEC  965 WATTS
RC Lander Fan Combo NA   NA NA 3.17MM  4 CELL NA   NA 3200   55A 750-820
WATTS
 
RC Lander Metal Fan Combo NA 68MM 125MM 3.17MM 4 CELL NA  NA 3575 50A 200-700 WATTS
RC Lander Metal Fan Combo   NA 68MM  125MM 3.17MM 4 CELL NA NA 4000  70A 880-1000 WATTS
RC Lander Metal Fan Combo UP TO 1500 G 68 MM 125MM

3.17 MM

3-4 CELL 1.8A N/A 3900 50 A 500
Watts

RC Lander Metal Fan Combo

UP TO 1600 G

68 MM
FAN

125 MM

3.17 MM

3 CELL

N/A 

N/A

4370 

50 A 

200-700 WATTS 

RC Lander
Dynamic Power
 NA 68 MM NA 3.17MM 4 CELL NA  NA 3580  70 A  880 WATTS 
 RC Lander
Dynamic Power
 NA 72 MM NA 3.17 MM  6 CELL NA NA  2550 60 A  1150
WATTS
 
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