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Silly question time......

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Old 05-15-2011, 11:11 AM
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Default Silly question time......

Good morning, can someone tell a simplton like me in layman's terms, how to measure the deadrise of a boat? I sort of know WHAT deadrise is but not how to find out how much a hull has.....

Is there an easy, quick way or does it take some skill, thought and math.....?

Thanks for any input.....
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Old 05-15-2011, 11:22 AM
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Originally Posted by FogduckerIII View Post
Good morning, can someone tell a simplton like me in layman's terms, how to measure the deadrise of a boat? I sort of know WHAT deadrise is but not how to find out how much a hull has.....

Is there an easy, quick way or does it take some skill, thought and math.....?

Thanks for any input.....
Deadrise is the angle created at the intersection of the keel and flat ground. For purposes of comparison, deadrise is measured at the transom. Deadrise usually increases in forward stations.

Anything higher then 22 degrees is usually considered a deep-v. Less is considered a Modified "v". 23 -23.5 is good. 25 is a bit extreme. The higher the deadrise, the more unstable the boat can be laterally.

Sharp, high degree deadrises in the entry area have a tendency to "stuff."

Hope this helps.

T
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Old 05-15-2011, 11:41 AM
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You must know me, posting a diagram is awesome.....

That is VERY helpful and clear info, thank you.

My hull has a small Delta pad so at the transom there is no "keel" as such, do I measure further forward where the actual keel starts?

PS. I always thought 24* was the max for deadrise...?
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Old 05-15-2011, 11:58 AM
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You would measure at the lateral corner of your pad. 23.5 ... 24.. it's all about personal pref. Cigarattes and their lineage of derived bottoms have what's termed an augmented dead rise in that the line making the rising angle is not straight... its convex.. or bowing outward a bit... especially in the forward stations which is why it's very hard to stuff one.

I use one of these... You might want to invest in one... Just remember, the boat needs to be level or else you will need the angle of lateral tilt so you can adjust.

http://www.homedepot.com/h_d1/N-5yc1...atalogId=10053
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Old 05-15-2011, 03:05 PM
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Not to muddy the waters any further, but in addition to many boats varying the deadrise from transom to bow, some vary it even at the transom - between the strakes. For instance, Progression runs 24 degrees just to either side of the pad to the inner lifting strakes, then 23 degrees to the outer strakes, then 22 degrees to the outside chines.
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Old 05-15-2011, 03:48 PM
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Thanks for the info guys......I didn't realize all the variables......

Not that it makes a difference on my current boat but it would be nice to know what it is. I am borrowing an angle finder from a friend, making sure the boat is level and using some long straight edges, see if I can get a measurment....
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Old 05-15-2011, 11:09 PM
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Good info here, thanks. I have always wondered the same thing
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