Props-Spin in or out ?
04-13-2009 | 08:37 AM
#31
VIP Member
Joined: Feb 2004
Posts: 12,314
Likes: 1,556
From: Maryland
Most Vees When the prop is on a upswing on the outside of the drive to travel fprward it will raise the bow. The water inthe middle of the drives is in the path of High PSI and several boundry layers face the blade entry making it less affective. Everyone forgets that Drive tow will increase or decrease the benefit Cats are far different/ Many things come into play, How prop is in the tunnel,deadrise,drive tow. Nost Apaches I ran liked drives turning in . but docking was more difficult.
04-14-2009 | 07:57 AM
#32
The Illustrious One
Joined: Oct 2000
Posts: 3,171
Likes: 4
From: Internationally Famous
Personally Rob I like to spin them in but the down side is the docking however if you can get close to the dock shifting the trans in reverse of what you would normally do tends to help it straighten out instead of crab walking!!!!
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04-21-2009 | 04:09 PM
#33
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
I've run the drives spinning in and it carried the bow. The result was a 1 mph gain on the top end.
In my opinion the boat suffered in quartering seas. With the props this way the boat would enter the air and want to twist as it became airborne making it land on the chine at times. PS, landing on the chine hurts!
In head-on or following seas it carried the bow nicely and wasn't an issue.
I decided to switch back to standard rotation for ease of docking, the quartering sea issue and only a 1 mph gain it wasn't worth it in my experience.
This was a side-by-side set-up but I've seen a lot of staggered boats and most step bottoms turning in so I guess it's best to test!.
In my opinion the boat suffered in quartering seas. With the props this way the boat would enter the air and want to twist as it became airborne making it land on the chine at times. PS, landing on the chine hurts!
In head-on or following seas it carried the bow nicely and wasn't an issue.I decided to switch back to standard rotation for ease of docking, the quartering sea issue and only a 1 mph gain it wasn't worth it in my experience.
This was a side-by-side set-up but I've seen a lot of staggered boats and most step bottoms turning in so I guess it's best to test!.
05-02-2009 | 10:38 AM
#35
Registered
Joined: Sep 2003
Posts: 9,214
Likes: 5
