[Alberg30] Props

[John Birch]

Gee I liked the notion of the boats wanting to return to Whitby - kind of like salmon returning to spawn. Well then again, perhaps not - as salmon die after they spawn ; )
  ----- Original Message ----- 
  From: chrishardy 
  To: public-list at alberg30.org 
  Sent: Sunday, February 03, 2002 4:08 PM
  Subject: Re: [Alberg30] Props


  Direction of prop walk is a funtion of  shaft rotation direction not gas or diesel or rpm or blade quantity. 
  James Davis wrote: 

    Don't blame the prop walk on two blades.  The increased prop walk is more from being able to spin it faster.  Those that have converted to diesels and get even more RPM on the prop in reverse get some very usable prop walk.  In fact the prop walk effect is probably the best way to steer when backing.  Assuming your boat backs to port (this can be different with a diesel) keep the tiller hard over for a right turn and by backing and filling, you can do a 360 in little more than the boats length.  Back - the stern goes to port.  Give it a goose ahead - the prop wash against the rudder nudges the bow to the right.  As soon as she starts going ahead, back hard for a few seconds - the stern jumps to port.  Keep it up and it is easy to turn around.   Note that this can be slow with the Atomic 4 and the original prop.Jim Davis 
    Isa Lei 
    A30 240
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