On Mon, Jun 2, 2008 at 7:09 PM, Callum M0MCX <[EMAIL PROTECTED]> wrote: > New boat, new prop with slight-to-moderate rudder judder from tick-over > upwards. > > How can I cure this? Ask builder to change prop?
Could be anything, but there is a small chance that the prop is just to close to the rudder. Changing the prop may help (larger number of blades, greater area... Crowther Engineering in Manchester may be able to furnish you with a suitable prop). Rudder balance could also be the problem, extending (or even reducing if too long) the balance on the rudder (the bit infront of the tiller) might help. Kismet's prop is set to high up with in the hull and we get cavitation, and vibration because of it. Our tiller, especially on high speed runs does judder. The rudder on Shoestring also shuddlers a little, and more when there is something on the blade. Not sure if any of that helps, but some dimensions of your underwater bits may help a little to diagnose the problem - any pictures? Cheers, Mike -- Michael Askin http://shoestring_DOT_zapto_DOT_org/
