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Originally Posted by superart
Anyone play with RC planes on here? Could you suggest an electric motor, or pair of motors, for a 90lb plane? Nitro or jet is not an option. Speed would be nice, but is not prime concern, but stability and minimizing vibration is. Plane will be used for an experimental recon project.
I'd appreciate a few suggestions from all price ranges.
Thanks.
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Finding electric motors to push a 90Lb plane around won't be easy. Electric motors by their nature are heavy for their power output. Plus you will need some mechanism to control the power to them. And then the actual power supply...you will need batteries of some sort. Again, heavy will be the name of the day for any available battery technology. Not sure what would fill the bill. Maybe some >14.4v cordless drill motors and their battery packs. You'd probably more than four motors, forget about two. And unless that thing cruises really efficiently, you'll be out of juice in minutes.
As a comparison, an ultralight with a person usually weighs in at ~400 ibs. Those machines can rarely top 100MPH and usually pack ~25HP Rotax motor or something like that. 25HP equates to about 19 kilowatts...that's a lot of electric motors by comparison, even with a quarter the power (to match your aircraft's weight). I would probably not go the eletric motor route with something that weighs that much. It will be limited in endurance, which is important for recon, and cost some serious kilobucks. Go with a heat cycle motor.