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Thrust vectoring
brian!!! knock it off!!
wrote: For years, on occasion, I've have been involved with teaching someone boat handling, using single and/or twin screw inboards.....if I told you that rudders were important tools of boat handling, but not to be considered for steering, rather for "thrust vectoring", when maneuvering around a dock, etc., when kicking an engine ahead, both positive and negative ...... would you understand what I was saying? otn Probably not, judging by one or two of the responses here. Perhaps it would be easier for you to demonstrate the effect of sucking a fluid past a board placed in the forward stream line. Take a hand vacuum (I used a Bissett) and close to the suction nozzle, place a sheet of paper parallel to the air flow into the nozzle. Place the edge quite close to the nozzle's side. You will see the paper move sidewards towards the airflow into the vacuum if the flow speed is unequal on each side of the paper. Bernouilli of course. The effect is quite small, but readily visible. Faster flow leads to lower pressure, of course. Extending the demo to the rudder placed behind the propellor spinning in reverse to show the small side force on the rudder should then be easier to communicate, I'd think. Brian Whatcott |
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