This page contains a Flash digital edition of a book.
for another 10% increment. This can con- tinue through 100% of control, but in 10% increments. The front pilots will not see any movement of the stick until the coolie hat is utilized and then they will actually see their sticks move in 10% increments. This is done electrically from the aft pilot stick. The aft stick provides inputs that control the AFCS which then controls the

Water Drop KOSH

Rear Facing Pilot Station

To place heavy objects accurately, the Aircrane has a pilot station that faces aft and is located just behind and below the flight deck. The field of view is excep- tional. It is interesting to note that the rear facing pilot technology may, in fact, be the first application of a fly-by-wire sys- tem. It was fielded in 1962 and works through the automatic flight control sys- tem with fly by wire controls. The functionality and operation of the rear facing pilot station has been improved over the years resulting in pin point accu- racy when placing a load. In the picture above the collective is the left hand and the cyclic (stick) is right. The Aircrane employs an anti-rotation device that keeps the load oriented with the aircraft through tortional control. Initially, control from the rear pilot seat for the E model was ac- complished through the back seat stick in pitch, roll, and yaw in 10% increments. If the stick had to be moved full travel (10%), say to hold the point in a cross wind and more authority was needed, the aft seat pilot would now use a coolie hat on the stick that trims the stick and allows

A view from rear facing pilot station

aircraft. It is a bit awkward but with a lit- tle practice the pilot can get the job done. For the F model, Sikorsky designed an en- tirely new AFCS hydraulic servo. Also added was a much faster and more effi- cient trim system. Further, sensors were located in the stick that senses any move- ment so that now when the stick is moved

Continued on page 24

www.ROTORCRAFTPRO.com • August 2009

23 Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52
Produced with Yudu - www.yudu.com