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Thrust vectoring
In article .net,
otnmbrd wrote: For years, on occasion, I've have been involved with teaching someone boat handling, using single and/or twin screw inboards. Naturally, (especially on twin screw+) the issue of rudder use arises ( from here we will consider this a twin screw+ discussion). So that everyone knows, I am a STRONG proponent of rudder use, but I understand many of the arguments against (G just don't agree with all of them or feel the argument doesn't really address the issue). In all of my discussions, I have had a problem with the term "steering", as in "the boats moving too slow to steer with rudders", or "rudders are not effective at these speeds". At any rate, I knew I was never able to explain my point clearly and concisely. Recently, for some unknown reason, I remembered a TV show on jet fighters which discussed (I believe) thrust vectoring, and it dawned on me that this may be just the term to describe what I am trying to get across to those I am teaching. With this in mind, for those with twin screw boats, 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 I believe I know what you're talking about, having learned how to "walk" a cat sidewards (using prop wash against rudder, and prop walk from the reversed engine) but I don't think I would understand "thrust vectoring" in that context unless I'd done it. It IS, to a certain extent, of course. Then again, I may be thinking too far in advance. If you're talking about swinging the bow about, I am thinking "torque" or possibly "balanced (or imbalanced) opposing forces". I don't think you're simply talking about the wash over the rudder. That is clearly thrust vectoring, but should be easy enough to explain as "kicking the ass over". -- Jere Lull Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD) Xan's Pages: http://members.dca.net/jerelull/X-Main.html Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/ |
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