Electric motor

I saw an electric motor, approx 2" diameter and 4 or 5" long, at a yard sale with a bunch of R/C planes. It looked like the plane had a 4' wing span. What might an electric motor like this cost? Any chance of it pulling a .35 size control line plane? I didn't get the name or specs of the motor so just any general info you folks might have is what I'm after.( I could go back and get it)
Thanks,
Norm

The newer motors are getting much lighter and much more powerful. I don't know what you would have seen there, especially since it was being sold on a garage sale. I would expect it to be an older version. Suitable batteries with sufficient capacity are getting lighter today (but not less expensive) along with the lighter motors. And there are several planes flying today (well, maybe not at this very minute) that not only can complete the pattern, but have been entered in contests.

The biggest problem is the weight and cost of the batteries, along with the problem of a shut-off which is not allowed by FAI rules. An electric motor doesn't just run out of juice, as do our fuel fired engines. They can go pretty constant for a while, and then start tapering off. Since the toughest part of the pattern is at the very end, you don't want much (any really) tapering off before you reach the end of the pattern. But then you do need it to end.

Here in the US we can still use a timer, or some such. Under FAI rules something may need to be added to make electric flight a plausable reality. Don't expect the overweight, underpowered (or really overweight if we wish to achieve comparable power) electrics to be a major challenge in the near future. But they certainly can be another avenue to challenge the mind, and flying against one another in an electric only event could make them quite appealing.

Len, do no worry about FAI rules and shut-offs. The old FAI rules speaks about internal combustion piston engine, so the shut-off problem is out of sense, you just cannot use electric engine. New rules allow it as well as shut of and clever regulators. I actually tested relatively small 6oz heavy brush less engine easily handling 12x4 plastic prop – that is quite enough for such a model. The weight with LiPoly battery pack is comparable to piston engine with full tank. I have already constant rpm regulator on desk, but no time to go further, may be after flying season.

it is probably an old ferrite can motor like a Speed 700. If you run it on the right number of NiCads it will have enough power to lift the plane off the ground.

The latest electric stuff is pretty potent. Use a high performance geared brushless motor or an outrunner motor, a good speed control, and 3 or 4 of the newest high current LiPoly cells. It definitely is in the same class as a Stunt 35 motor for power and weight. But it does cost, somewhere around $250 for the power package. And you have to wait an hour or two to recharge the battery after every flight, or else buy a spare set of cells for another $100 or so.