NEW Power unit HT-T350 ST Hendrych Tenshock is a high quality electric motor with reductor. Its used for F5J models where high performance is crucial, which is one of the reasons its also
used for competitions. The motor is a product by a well know quality manufacturer.

NEW Power unit HT-T350 ST Hendrych Tenshock is a high quality electirc motor with reductor, weights 76 grams / 2.68 oz. Its used for F5J models where high performance is crucial, which is one of the reasons its also used for competitions.
This powertrain can be used for models up to 1400gr / 49 oz. The power unit with reductor is capable of delivering 500W constant power. The unit has a gear ratio of 6:1, featuring 3 planetary gear sets and ball bearings.
At about 1200gr model weight, the climb rate is 13 - 16 m/s. The data is calculated with 3S LiPo batteries.
The motor is small, with a diameter of only 21mm, so it fits into any model with no problems.

Recommended setup: 12x7, 12x8 or 13x6 prop on 3S 850 mAh LiPo
Also: 15x8 on 2S 850 mAh LiPo

Power unit HT-T350 ST Hendrych Tenshock specifications:        

Power unit  HT-T 350 ST
(from Hendrych Technik)

Motor:  
Type 1020/14,  KV 4400  (Tenshock)
Rotor poles 4
Max. power on 350 W
Max. Voltage 23 V (max. 4S LiPOL-HV)
Max. current 30 A
Timing 8-10°

Motor weights 76 grams / 2.68 oz.
                                    
Reductor:
Type PG20 planetary gear (3L with BB)
Gear ratio 6 : 1
Max. power on 500 W
Shaft diameter 5 mm
Lubricating without disassembly by hole in shaft
Mounting holes  4xM3 screws in 19 mm diameter

Usage example :

Current was measured during short time static test  in the ground (less than 5 s) not in the air
Mark „PR-XXX“  = Primos Rizner Propelles