Jeppesen CR-3 Flight Computer: the E6B's Cool Cousin

While the E6B “Whiz Wheel” is the most popular mechanical flight computer still in common use, there are many alternative designs, including the Jeppesen CR-3. Patented in 1955 and manufactured by Jeppesen-Sanderson, a company with a long and storied history in aviation navigation, the CR-3 dispenses with the slider used by Dalton-style computers, instead using a more compact disc mechanism to perform wind triangle calculations.

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0:00 Introduction
0:50 Elrey Jeppesen
2:21 Jeppesen & Co. And “Jepp Charts”
3:36 Other Flight Computers
4:15 CR-3 Patents
4:38 Time-Speed-Distance
6:00 Fuel Consumption
6:08 Unit Conversions
7:13 Altitude
9:11 Airspeed
11:26 Mach Number
12:45 Wind Side
13:33 Magnetic/True Course Conversion
14:02 Crab Angle
16:36 Wind Calculation
18:07 True Course / Ground Speed
19:50 True Heading / Airspeed
21:05 Off-Course Correction
22:03 Outro


SOURCES

https://news.google.com/newspapers?id...

https://web.archive.org/web/201007191...

http://sliderulemuseum.com/Aerospace....

https://web.archive.org/web/201206270...

https://web.archive.org/web/201503300...

https://web.archive.org/web/200611300...

https://patents.google.com/patent/US2...

https://physicsmuseum.uq.edu.au/sites...

http://www.flight-computer.de/Air-Nav...