Wednesday, August 7, 2013

How to control Flying Radio Control I.C. Powered Model Aircraft ? The Receiver & The Battery part

The Receiver 

This is the small rectangular sealed box with a length of thin wire protruding from one end and a set of sockets and exposed pins at the other end. These sockets are provided to receive the plugs attached to the servos. Normally the sockets are marked with the appropriate designated function. The number of functions available will normally range from 4 up to 7 or 8 depending on the model purchased. There will also be another input socket designated for the battery lead.

There will also be a socket to take a receiver crystal. The crystal will normally be fitted in situ when a new system is purchased. Crystals are usually supplied in matched pairs designated Tx (Transmitter) & Rx (Receiver), the frequency value in MHz and/or the channel number. Never interchange the Tx and the Rx crystals.


These are the brut force of the system. The servos convert an electronic signal from the receiver into mechanical output. Most modern servos have a central output shaft to which can be attached a variety of output arm types. If you purchase a new system the servos will usually arrive ready fitted with a matching set of output arms. Alternatives will be provided along with other accessories in a plastic bag.  The direction of rotation of the output shaft can usually be reversed via a facility within the transmitter. Refer to your owners manual should this be necessary.

The Battery 
Most modern outfits are supplied with a four cell 4.8 volt 600ma/h nicad rechargeable battery to power the airborne system. Treat this battery with extreme caution and respect. You ignore the manufacturer’s guidelines as to its charging and discharging methods at your peril!  What you must understand is that a battery failure during flight usually means major expense and lost flight and training time whilst the resulting damage is repaired or replaced. This is equally important in respect of the transmitter batteries which again are usually rechargeable.

We’ve quantified all the essential components of your flight training kit and what they all do. We’ve discussed the best way to get started and your responsibilities, so now its time to look at how everything works, especially your model.  A little understanding of the physics of flight will prove invaluable for you when things start to happen.  Knowing why your model is moving in a particular way will help you appreciate the actions you need to take to retain complete control over its direction and attitude.

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