Servo HBS 870 BB, MG Graupner 7991

Servo HBS 870 BB, MG20 mm Heli TS Servo Graupner 7991 Description
Ideal for motorised model aircraft and model gliders, helicopters (swashplate), model boats and RC cars. Overvoltage diodes provide protection against voltage peaks caused by return currents.

• High voltage, operating voltage up to 8.4 V!
• Direct operation with 2-cellLiPo batteries
• Operating voltage range 4.8 ... 8.4 V
• Brushless
• 2 x ball bearings
• Metal gearbox

Info
High-Voltage Brushless Servo (HBS) HBS (high-voltage brushless servo) combines the performance of brushless technology with all the advantages of high-voltage servos. In addition to the unparalleled acceleration, greater efficiency, and no wear of carbon brushes, these servos can be supplied with an operating voltage of up to 8.4V. Direct connection of 2-cell LiPo battery packs is now possible with no problem; in addition, these servos also provide top performance at an operating voltage of just 6V. Precision in manufacturing and assembly as well as the very best component quality make uncompromising power and speed available to the servo mechanism. A new dimension in the combination of power, speed, acceleration, precision, and resolution.

Specification
Holding torque 6.0V, approx.: 220 Ncm
Transit speed at 6.0 V, approx. : 0,09 Sek/40°
All-up weight, approx.: 68 g
Angular travel incl. trim, approx. : 2 x 45 °
Transit speed at 7.4V, approx. : 0,07 Sek/40°
No-load current drain, approx. : 47 mA
Torque at 6.0V, approx.: 110 Ncm
Holding torque 7.4V, approx.: 260 Ncm
Charging rate at 6.0V approx.: 2390 mA
Dimensions (LxWxH): 40 x 20 x 40 mm
Torque at 7.4V, approx. : 130 Ncm
Bearings: Lager bb2x
Replacement gearbox: 7991.2
Charging rate of 7.4V approx.: 2850 mA
Gear unit: Getriebe mg
Operating voltage : 4,8 ... 8,4 V
Neutralimpuls: 1,5 ms
Max. Ansteuerfrequenz: 2,5 / 400 ms / Hz