Hi Roger:
I'm fairly certain that their contra motors aren't intended for control line use.
Quite heavy for our purposes, no ?
Frank
Frank,
Countra-rotating systems are heavier do not know the weight of the model sold by the Paweł Dziuba single engine (photo), but these HImax model CR3516-1030 weighs 275gr - 9.7oz ....
http://www.maxxprod.com/mpi/mpi-266.htmlFeatures:
High Efficiency - High Power - High Torque - Lightweight - Equivalent to .50 size glow engine.
Specifications:
Weight: 275g, (9.7oz) with prop adapter
Max Power: 800W, (This is dependent on several factors)
Max RPM: 12,000 RPM
Diameter: 35.3mm, (1.39")
Length: 64.3mm (2.53")
Shaft Diameter: 4.73mm (3/16") front shaft, 9.48mm (3/8") rear shaft
Motor Mounting Holes: 4 holes, 3.17mm through, on 43mm, (1.7") bolt circle
Maximum Case Temperature: 65oC, (149oF)
KV= 1030, Rm = .0.035, Io of front motor = 4.8A/10V, lo of rear motor = 2.3A/10V
Efficient Operating Current =30-36 A per rotor, 40A Max 15 seconds per rotor.
Suggested Props: For 3-cell operation APC 12x6P front prop, APC 11x8E rear prop
Battery: 3-cell Lipo that can sustain 70 to 80 amp continuous draw.
ESC: Two 35 Amp ESCs or equivalent. Also needs a MPI 2160 or 2460 Y-harness to join the two ESC to throttle channel.
ESC setting: Cutoff - soft, Brake - disabled, Throttle type - airplane, fixed endpoints.
Rogerio.