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Originally Posted by Dr.Sid
Bill .. thanks for nice sum-up. So there are 2 ways of settings planes ? For lift (front and rear same direction) and for pitch rotation (opposite direction) ?
How is this done ? I mean .. I know 688 has 2 controlling wheels like in airplane .. which wheel controls what surfaces ? How is bank controlled ? Are there any more controls like pedals ? (I bet they are).
And Bill .. what is your opinion about screw reaction ?
Fatty .. I guess you'll face mutiny on your boat soon !  |
Traditionally, there are two planesmen. The bow/sail planes are controlled by one, the sternplanes and rudder are controlled by the other. Thus the two control wheels. If I recall correctly, the sternplanes/rudder were controlled from the left seat, the bow planes from the right seat. However, control could be swapped between the two. SOP was for the stern planesman to control the boat's angle, and the bow/sail planesman to control depth.
Nope, no pedals, and no control of bank. 'Snap rolls' are prevented by going easy on the rudder at high speeds; the tendency to pitch down in turns is counteracted by the stern planes (thus, the helmsman, who controls both the rudder and stern planes, needs to be experienced).
Don't know about how screw 'torque' is counteracted in sub design (other than the rare counter-rotating screw, and two-screw subs). It was never a problem afaik.