|
|
|
|
|||||
|
||||||
Subject: TWL: Re: Prop locking
LRZeitlin@XXX.XXX
Date: Fri Mar 01 2002 - 11:38:36 EST
In a message dated 3/1/02 5:02:33 AM, you wrote:
<<I have been told that the BW transmissions in Nauticat sailboats will get
noticeably hot to the touch after 10-12 hours of fast (for a sailboat)
freewheeling. I can say I was glad to get a feathering prop on my boat and
eliminate this source of noise and wear.>>
There has long been an argument within the s-------t racing community over
whether a locked or free spinning prop has less drag. Most of the research
shows that a locked prop has less drag than a spinning prop. At least this is
true for most cases. The exception seems to be when the spinning prop turns
exceptionally easily, apparently without the resistance of cutless bearings
and a gearbox. So you twin engined boat owners who want to shut down one
engine should note that locking the unpowered prop will save a bit of fuel as
well as easing anxieties about tearing up the reverse gear.
Larry Z
|