By experiment, I added a tip to the base of my rudder's trailing edge. Over the years, I extended that tip twice and am now satisfied with the compensation it affords my rudder pressure. My outboard washes directly onto the rudder when in reverse. And though it dynamically pressurizes my rudder in that situation, I like it as I know it is coming and it allows me to precisely control my reversing situations. The tip is below the thrust of my outboard which has a Kort nozzle which focuses its thrust and eliminates propeller tip vortex. David Hoyt Sovereignty Catalina 27 #65 ahsovereignty In a message dated 3/30/2010 10:04:41 A.M. Eastern Daylight Time, [email protected] writes:
I just can’t resist… Perhaps the best way to stop this problem would be to cut off the head of the rudder as in decapitation. I am betting you meant cavitation and spell check “helped” you out. Cavitation is when water swirls into a funnel and air is sucked into the prop field and instead of pushing water it is pushing air/water mix. Joe McCary Aeolus II. #4795, West River, MD _www.aeoluswestriverwww._ (mip://019d1c30/www.aeoluswestriver.net) joe at photoresponse dot com From: ic...@yahoogroups. ic...@yahoogroups.<WB ic...@yahoo IC27On Behalf Of Sneddon, Keith - ES/IS. Under power from an inboard, the flow over the rudder is usually at a much higher velocity, and because of that plus the proximity of the prop to the rudder, is very turbulent (small scale phenomena) plus not very organized as per direction (due to swirl, capitation,etc.). __________ Information from ESET NOD32 Antivirus, version of virus signature database 4983 (20100329) __________ The message was checked by ESET NOD32 Antivirus. _http://www.eset.htt_ (http://www.eset.com/)
