Almost ready to fly
In reference to RC helicopters, an almost ready to fly, or ARF kit is one that comes from the manufacturer with its airframe partially completed. An almost ready to fly helicopter kit generally requires the purchaser to install things such as the motor or engine, the servos and the receiver. It may or may not include these items to allow the builder to choose their own equipment and purchase it separately. Almost ready to fly is a general term which means different things to different manufacturers. Some kits labeled with this term are more complete than others and require less work and fewer additional components to become airworthy.
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