Q) How do you tell which Electric Motor is equal to what Glow Engine?
A) One of the biggest confusions for most people selecting an electric motor is, “What is a watt?” The glow guys are used to horsepower and electric power systems are measured in watts.
(1 hp = 746 watts or about 750 watts)
Don't go by the max rating for HP that engine manufacturers publish. That is a MAX figure and very seldom is an engine for sport use operated at that figure. The h.p. drops off quite a bit when the RPM is not at the rated figure which is usually around 16,000 RPM’s or greater.
Glow Engines vs. Electric Motors
See E-flite Park 400 and Power 60 series that mimic replacement sizes for old brushed motors and glow engines.
- ♠ .20-size glow engine / 300w electric motor
- ♠ (OS Max 0.20 engine develops 0.4 hp = 300w electric motor (AXI 2820) )
- ♠ .35-size glow engine / 500w electric motor
- ♠ (Fox 0.35 stunt engine develops 0.7 hp = 522w electric motor)(AXI 2826)
- ♠ .40-size glow engine develops 1.0 hp = 750w electric motor (AXI 2826 or 4120)
- ♠ .60-size glow engine develops 1.3 hp = 975w electric motor (AXI 4120 or 4130)
- ♠ .90-size glow engine develops 1.6 hp = 1200w electric motor (AXI 5320 or 4130)
- ♠ 1.20-size glow engine develops 3.0 hp = 2250w electric motor (AXI 5330)
- ♠ DA-50 develops 5.0 hp = 3750w electric motor (AXI 5330)
- ♠ DA-100 develops 9.8 hp = 7311w electric motor (Double AXI 5330)
Himax Brushless Motors
HC50 Outrunner 800-1500 Watts HC50 - These motors are for large models weighing 6-8Lb for 3-D flight, 8-15Lb for aerobatic flight and 10-20Lb for leisure flight.
• Gas equivalent - .46 - .90
HC63 Outrunner 1700-2200 Watts HC63 - These motors are for large models weighing 10-12Lb for 3-D flight, 17-22Lb for aerobatic flight and 22-30Lb for leisure flight.
• Gas equivalent - 1.20 - 1.80