Air Craft Datasheet

 
The Hacker B40 Brushless Series
Light and Powerful
These small, powerful motors have dominated many areas of e-flight since they were first introduced.

Like all Hacker Brushless Motors, they offer the highest possible power to weight ratio, and are versatile.

The direct drive motors are extremely popular in racing boats, helicopters, pylon racing airplanes, and ducted-fan jets.

The geared motors come with a special front motor plate with an integrated adapter for the Maxon ceramic 4.4:1 planetary gearbox.  This combination has probably powered more gliders to the winner's circle than any other in history.  Small hotliners rip up the sky on the B40 S + gear motors, and 2M LMR competition gliders often use the B40 L+ gear series.  These are also appropriate for "480" to "500" class aerobatic models, using motor versions with lower Kv ratings and, depending on the model, more cells.
 
Model Type Example of Type Motor Choice* Cell Count/Type Prop:
Small Softliner Little Star B40-10S + 4,4:1 6 or 8 x 1200mAh 12,5 x 8 or 14 x 9,5
Mid-Size Softliner or 1600g Thermik Star B40-12L + 4,4:1 8 or 10 x 1600mAh 14 x 10 or 16 x 10
E-Segler or 2000g EXCEL Competition B40-10L + 4,4:1 8 or 10 x 2400mAh 13 x 7 or 15 x 9,5
7-Cells Hotliner Flüchter B40-6S + 4,4:1 7 x 2400mAh 13 x 10,5
Small Hotliner Mini Elipse B40-8S + 4,4:1 7 or 8 x 1200mAh 12,5 x 8
Hotliner or 1400g Lift OFF XS B40-6L + 4,4:1 7 or 10 x 2400mAh 13 x 7 or 14 x 11
Ducted Fans MiniFan 480 B40-10S 8 x 2400mAh  
  MiniFan 480 B40-12S 10 x 2400mAh  
  MiniFan 480 > 350Watt B40-8L    
  Kyosho Impeller B40-10S 8 x 2400mAh  
  Kyosho Impeller B40-12S 10 x 2400mAh  
F5D-Pylon AVIONIC-D, TOKOLOSCHI B40-F5D-FAI 9 x 1600mAh 4,7 x 4,7...5,5 x 4,3
  ARIANE P5 B40-F5D-FAI 7 x RC 2400 4,7 x 4,7...5,5 x 4,3
F5F-Class ARIANE V10 B40-F5F-FAI 10 x 2400mAh 16 x 16 or 17 x 16
Boats ECO B40-12S 7 Cells  
  MONO 1 B40-9L 7 Cells  
  HYDRO 1 B40-12S / B40-8L 7 Cells  
  Mini- MONO / HYDRO B40-11S / B40-10S 7 Cells  

 *motors are examples of common choices, but other types may also be appropriate depending on battery type, cell count, etc...
Kv and Impedance for B40 Motors
The "wind" is number of turns. Ex: B40 8S has 8 winds
 
Winds Ri (impedance) Kv (rpm/volt)
S type L type S type L type
4 - 0,0028 - 7531
5 - 0,0044 - 6025
6 0,0052 0,0063 7100 5000
7 0,0071 0,0086 6086 4286
8 0,0092 0,0112 5325 3750
9 0,0118 0,0143 4733 3333
10 0,0150 0,0181 4260 3000
11 0,0175 0,0212 3873 2727
12 0,0213 0,0258 3550 2500
13 0,0247 0,0299 3277 2308
14 0,0287 0,0348 3043 2143
15 0,0327 0,0397 2840 2000
16 0,0379 0,0459 2663 1875
17 0,0418 0,0506 2506 1765
18 0,0471 0,0571 2367 1667
19 0,0537 0,0651 2242 1579
20 0,0585 0,0709 2130 1500
21 0,0644 0,0780 2029 1429

 
Motor: Weight Diameter Length Shaft Dia. Shaft Length
B40 S  125 g 27,6 mm 47 mm ø 3,17 mm 12 mm
B40 L  158g 27,6 mm 56 mm ø 3,17 mm 12 mm
Direct Drive
 
Geared Motors