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Title: Heli servos on airplane ? Post by: gauravag on January 10, 2011, 06:43:34 PM Guys,
I was wondering if it would be safe to use Heli servos on an airplane ? Specifically Align DS610/620 which have great specs and low cost. I would be looking to use them on a 30CC airplane. From my common sense, it should be OK, but if there is anything else i am missing, do let me know. Thanks Gaurav Title: Re: Heli servos on airplane ? Post by: CrazyPilot on January 10, 2011, 07:54:15 PM Please read point by point and decide on these factors
plane size, weight & type? Servos have a number of qualities that make them suitable for different applications: * Torque – This is a measure of the servos “strength”, or how much “push” it has. Torque is the product of force and the radius at which it acts. Bigger planes need high torque servos to move their large control surfaces. In general, servo size goes up with rated torque. * Speed - Speed measures how fast the servo can move from one position to another. Different RC airplanes and helicopters will need servos with different speeds. For example: a trainer doesn’t need to change control surface positions rapidly, but a 3D helicopter or plane does. High speed servos are many times more expensive than standard ones. * Dimensions – As stated previously, the dimensions of a servo increase with the torque that it provides. * Weight – The weight of a servo depends on several variables. Most often recorded in grams, the weight of a servo is always reported on the package. * Bearings – There are two ways to support the output shaft of a servo – bearings and brushes. Brushes are cheaper, but bearings last longer and operate more smoothly. Very small and very cheap servos tend to be brushed, while high end and very large servos generally have bearings. * Gears – Most hobby grade servos use nylon gears, while higher end servos use metal gears. Metal gears add more weight, but their advantage is that they can’t “strip”, causing an RC helicopter or airplane to crash. Metal gears wear over time, which can cause “slop” in their rotation, but the gears can be replaced somewhat economically. Title: Re: Heli servos on airplane ? Post by: vinay on January 10, 2011, 11:18:38 PM Gaurav, from what I know, its better to have metal gear servos. also I dont see why its not possible to use heli servos on airplane. In fact I have read that plane servos should not be used on helis.
ALso its better to buy indirect drive potentiometer servos in case of high vibrations. hope to read more answers. |