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Saint Maurice
07-27-2006, 02:50 PM
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


♠ .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)See E-flite Park (http://www.horizonhobby.com/Products/Default.aspx?ProdID=EFLM1100) 400 (http://www.horizonhobby.com/Products/Default.aspx?ProdID=EFLM1100) and Power 60 (http://www.horizonhobby.com/Products/Default.aspx?ProdID=EFLM4060A) series that mimic replacement sizes for old brushed motors and glow engines.
http://www.gregcovey.com/Glow_Conversions_Made_Easy.htm (http://www.gregcovey.com/Glow_Conversions_Made_Easy.htm)

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

http://www.maxxprod.com/mpi/mpi-2601.html (http://www.maxxprod.com/mpi/mpi-2601.html)

Rugar
08-01-2006, 02:33 PM
All posts in this thread were moved to duplicate thread in power systems.
http://www.wattflyer.com/forums/showthread.php?t=8884

Please do not double post the same thread in two different forums.