That creepy looking device with the wheels and the sliding card may
seem intimidating, but it's really easy to use.
For the test you will use it to find just TWO variables:
In "Flight Time" questions you will always be finding GROUND SPEED
In " Heading" questions you will always be finding WIND CORRECTION.
Follow my step by step instructions the same way every time and you
will always get the correct answers.
Dr. Alan Feller
17 май 2015