radar
radar
RADAR
radar
rotor, rotator
The monitoring device is a radio transmitter that sends signals to the radio transmitter. Radio waves are a type of Electromagnetic waves.
A palindrome for "radio device to locate objects" would be "radar." A palindrome is a word, phrase, or sequence of characters that reads the same forwards and backward. In this case, "radar" is a perfect palindrome as it reads the same way from left to right and right to left.
radar
probably radar
Radar is an object-detection system that uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircrafts.
radar
It depends on your definition of cheap. There are many radio controlled aircrafts that are under $100. You can now find some that are half of that. You can shop for cheaper aircrafts at http://www.redrockethobbies.com/
radar