Robin Lewis wrote: > Snip lots of discussion about cavitation, ventilation or whatever: > > I'm not sure whether ballast will solve the problem though, the > counter base plate is normally well below water level. Still , it's > worth a try, I've got a few surplus lumps of steel at the pointy end > that I can move back. > > Oh, and on the 'cavitation vs ventilation' issue, take a look at: > > http://www.powerboat-training.co.uk/articles/articles-propellers-ventilation,%20cavitation.htm > > No idea if it's right or not, but it sounds authoritative to me.
Looks just about reasonable explanation to me. The effect (on the boat) will be the same - after all one is mixing water with gas : air=ventilation; steam=cavitation (yes steam - water boiling = steam, even at low pressures as experienced by cavitation). As someone else said, true cavitation will always get worse as the revs go up - if the vibration disappears as the revs go up then it's definably not cavitation. Ron Jones Process Safety & Development Specialist Don't repeat history, unreported chemical lab/plant near missesa at http://www.crhf.org.uk Only two things are certain: The universe and human stupidity; and I'm not certain about the universe. ~ Albert Einstein Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/canals-list/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
