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A forward slip and side slip are not the same. The forward slip is a cross contolled maneauver where the the longitudal axis is angled away from the flight path. Basically if you flight path was 360 degrees then the wings would be banked to the left and the nose (longitudal axis) would be pointed off to the right say around 030 degrees. This is mainly used to create large amounts of drag for faster descents withour increases in airspeed. Also be aware the in any slip airspeed errors will be present. Most airplanes will show a lower then actual airspeed when in a left slip and the opposite when in a right slip. A side slip in simply a slip wher the nose (longittudal axis) of the airplane is alignes with the flight path. This is used mainly for crossswind corrections. A crab is simply flying the airplane normally and coordinated at such a way that you are simply inputting wind correction to keep your desired flight path. If the wind is blowing 090 a 15kts and your course bearing is 360 then flying 360 will take you way off course. Using your flight computer you would get your wind correction angle (about 5 degrees for 110 knot cruise) and then apply that correction and that is your crab. Your heading of of 355 degrees gives you a crab angle of 5 degrees. The name is given because of the crooked way that a crab walks. See how simple it is!! HOPE THIS HELPS EVERYONE!!
Stephen C. Sharp
Comm. Pilot
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