Great Planes Hyperflow 370 EP Ducted Fan w/o Motor

Tower Stock# GPMG3910  •  Manufacturer Stock# GPMG3910
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Notes from our tech department:
This is the Great Planes HyperFlow 370 Ducted Fan Unit without Motor.
For modelers 14 years of age and older.
Direct fit for the Great Planes ElectriFly MiGLET and XPD-8 flying wings.


Uses a 370BB size Brushed motor, unit can also be adapted to use a
20mm and 24mm Brushless In-Runner motor see COMMENTS
56mm fan system replaces any system using this size fan
Includes additional stator vanes to straighten airflow for higher
speed Brushless motors
Housing is precisely molded for smooth airflow and truly awesome
Warranty: Great Planes Model Manufacturing Company guarantees this
product free from defects in both materials and workmanship
at the date of purchase.

The following performance data was achieved using the stock intake
lip and no exhaust duct

370 Brushed 370BB Motor (not included, GPMG0310)
LiPo Voltage Current Power Static RPM Efflux Speed Efflux Speed
Cells Thrust meterssec mileshour
3 11.1V 10.3A 114W 240g (8.5oz) 29,000 32.40 72.48
4* 14.8V 16.0A 230W 408g (14.4oz) 37,500 39.98 89.44

Optional Brushless Motor 20-40-3500
2 7.4V 8.7A 64W 215g (7.6oz) 27,000 30.88 69.08
3 11.1V 15.7A 174W 389g (13.7oz) 35,800 38.81 86.82
4* 14.8V 22.3A 330W 564g (19.9oz) 43,000 48.44 108.36

Optional Brushless Motor 24-33-4875
2 7.4V 17.2A 127W 303g (10.7oz) 32,300 40.91 91.50
3* 11.1V 32.0A 355W 548g (19.3oz) 42,100 73.98 165.49

Optional Brushless Motor 24-45-3790
2 7.4V 9.7A 72W 207g (7.3oz) 27,120 27.95 62.51
3 11.1V 19.9A 221W 450g (15.9oz) 38,600 60.75 135.89
4 14.8V 32.6A 482W 721g (25.4oz) 48,000 97.34 217.73

* Burst Use Only Calculated Values


Great Planes HyperFlow 370 Ducted Fan Unit
Brushless motor ring adapter
2, 2.3, and 3mm Fan Rotor Adapters


Motor, Electronic Speed Control and batteries see COMMENTS
Threadlocking Compound (GPMR6060)
Phillips Screwdriver
1.5mm Hex Wrench (GPMR8010)
Medium CA+ Glue (GPMR6008)


Intake Area: 3.50 sq in (22.6 sq cm)
Fan Swept Area: 2.71 sq in (17.5 sq cm)
Exhaust Area: 2.70 sq in (17.4 sq cm)
Optimum Flying Speed: 56 mph (90kmh)
Maximum RPM: 50,000 RPM
Housing Inner Diameter: 2.14 in (54.5mm)
Outer Diameter: 2.23 in (56mm)
Weight, Fan System Only: 1.3oz (37g)


NOTE: If the three keys in the fan housing do not properly align with
the slots in the adapter ring when installing a 20mm Brushless
motor, trim away any two of the three keys using a hobby knife or a
rotary tool. The one remaining key on the fan housing will fit into
any of the three slots in the adapter ring. Continue with the
20mm Brushless motor installation as described in the manual.

Following are the ONLY recommended power systems for this fan-

Brushed Power Systems:
Speed 370 BB Brushed Motor (GPMG0310)
ElectriFly C-25 ESC
ElectriFly 3-cell 850mAh LiPo

Brushless Power Systems:
ElectriFly Ammo 20-40-3500 Brushless Motor (GPMG5140)
ElectriFly Ammo 24-33-4875 Brushless Motor (GPMG5170)
ElectriFly Ammo 24-45-3790 Brushless Motor (GPMG5185)

ElectriFly SS 12A Brushless ESC (GPMM1810)
ElectriFly SS 25A Brushless ESC (GPMM1820)
ElectriFly SS 35A Brushless ESC (GPMM1830)
ElectriFly SS 45A Brushless ESC (GPMM1840)

3-cell 850mAh LiPo (ONXP1789)
2-cell 1200mAh LiPo (ONXP2170)

jxs 52206
Specs update EEW 82106
updated JAW 6408



Product Documents & Files

Manufacturer Contact Information