Quiz...I think this could be fun
#21
Registered
VIP Member
Join Date: Jan 2007
Location: Sweet Home, North Alabama and Orange Beach
Posts: 794
Likes: 0
Received 0 Likes
on
0 Posts
X dimension=Square root of:
(Camshaft to Crankshaft^2)*(Crankshaft-Propshaft^2)-(keel to oil pan^2)+(lenght of waterline+windsheild Height)/(lenght of boat trailer +number of wheels)-(Tounge weight in kilos+name plate capacity in lbs-saftey equipment weight)+(minum octane rating * % of solid fiberglass of hull+amount fuel burn during 90 second wot blast)
#23
Platinum Member
Platinum Member
I always wondered why it was dubbed X-Dimension and not Y-Dimension. Conventional wisdom would imply that any measurement along an X axis would be one that is lateral. The Y axis is most commonly associated with a vertical dimension or measurement.
#24
Registered
X dimension=Square root of:
(Camshaft to Crankshaft^2)*(Crankshaft-Propshaft^2)-(keel to oil pan^2)+(lenght of waterline+windsheild Height)/(lenght of boat trailer +number of wheels)-(Tounge weight in kilos+name plate capacity in lbs-saftey equipment weight)+(minum octane rating * % of solid fiberglass of hull+amount fuel burn during 90 second wot blast)
(Camshaft to Crankshaft^2)*(Crankshaft-Propshaft^2)-(keel to oil pan^2)+(lenght of waterline+windsheild Height)/(lenght of boat trailer +number of wheels)-(Tounge weight in kilos+name plate capacity in lbs-saftey equipment weight)+(minum octane rating * % of solid fiberglass of hull+amount fuel burn during 90 second wot blast)
Sq. Rt. of (5.150^2)(21.8125^2)-(17^2)+(312+18)/(32+4)-(409+2400-113.72)+(89*86.3+1.99) = 131.63049
Asuming it's a bravo boat, trailer full of blinker fluid, and ceramic muffler bearings
#28
Registered
Thanks Griff. So on a twin how would one go about measuring? From crank to bottom of keel? V hull no notch.
And what might be the optimal measurement for propshaft to bottom no boxes?
And what might be the optimal measurement for propshaft to bottom no boxes?
Last edited by POWERPLAY J; 03-23-2012 at 01:57 PM.
#29
Registered
Join Date: Apr 2009
Location: Denmark and hopefully some place nice
Posts: 1,852
Likes: 0
Received 1 Like
on
1 Post
J you measure from crant to the bottom of the hull directly under the crank, not the keel. It is always measured perpendicular to the crank, no matter the number of engines ect. There is no optimal x as such, it depends on what you want to do. Many twins today run between 17" and 19" in B1 applications. Some a bit less, some a bit more. It also depends on whether the manufacture set it up with shorties and/or boxes from the beginning. When talking drive x-dim, it refers to the distance from input to output shaft.
Last edited by A.O. Razor; 03-23-2012 at 06:53 PM.
#30
Registered
Thread Starter
Join Date: Sep 2007
Location: Gaylord, Mi
Posts: 2,573
Likes: 0
Received 0 Likes
on
0 Posts
See some expereinced boaters are learning somthing. From reading what others have talked about in the past I thought it was tottally related to prop shaft height but turns out prop shaft height is just relalted to x dimension and it depends on the length of the drive.