APR's CR Circular Computer has actually been a favorite of professional pilots, navigators, and air travel engineers for approximately Twenty Years. If you started your flying career with the fundamental E6-B type computer system you will find both similarities and vital distinctions in between the E6-B and the CR Computers. When you become acquainted with the CR computer system it will more than likely be your preferred cockpit aid. Many of the scales on the calculator side are similar to those discovered on the E6-B. However, the CR has numerous new functions readily available on nothing else computer system, making it the most useful instrument for modern-day piloting needs. The wind side of the CR uses a wind triangle that is rather various than the E6-B and it provides quick, streamlined solutions to all course navigation issues. The bigger CR-6 provides maximum readability while the smaller CR-3 and CR-4 designs supply benefit. Only apr's computers have the unique apr Microset that permits the computers to be lined up for complete precision prior to leaving the manufacturing facility. Although they are precision instruments you will take pride in owning, the details they give you is only as good as the details you give them. For this reason, we suggest you put in the time to study this manual very carefully. Our CR computer system is purchased by the U.S. Government under the recognizing description of NSN 1R 6605-00-928-4552 UX. Calculator The calculator side of the CR computer system is made for quick, exact calculation with problem resolving capabilities adapted to existing aviation needs. Wind Calculation The wind-computing side of the CR computer system uses the lastest "modern" innovation. With this new instrument your pre-flight and in-flight computations are easier and even more exact.
The wind side of the CR provides quick, simplified solutions to all course navigation problems.
Exclusive Microset that allows the computers to be aligned for total accuracy.
Double Sided: (1) Calculator side (2) Wind Computation side