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Old 10 July 2004, 04:07   #1
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reverse chine?

Question: What, exactly, is reverse chine? What is straight (I guess) chine? Why would one want one or the other? Thanks. john
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Old 10 July 2004, 07:45   #2
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Reverse chine

Reverse chine - easy to draw but a bit more difficult to describe.

The chine is where the bottom of the boat joins the side.
Most chines incorporate a spray rail - a horizontal section up to a few inches wide. These deflect spray and increase lift.

A reverse chine is where this spray rail is angled down and much wider than normal. The idea is that it should should trap water and air under the hull for lower drag.

The front end of a Boston Whaler is an extreme example of this feature.

I hope this helps.

Duncan
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Old 10 July 2004, 18:01   #3
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Does it work?
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Old 11 July 2004, 04:00   #4
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Have a look at Ballistic 7.8 metre hull. This has reverse scallop chines. Quite a hard ride in a chop but amazing sea keeping qualities. This boat has nerver heard of "Chine Riding"
www.ballisticmarine.com
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Old 11 July 2004, 11:15   #5
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Hard Chine soft chine, reverse or what!!!?!!

Quote:
Originally Posted by Searider
Reverse chine - easy to draw but a bit more difficult to describe.

The chine is where the bottom of the boat joins the side.
Most chines incorporate a spray rail - a horizontal section up to a few inches wide. These deflect spray and increase lift.

A reverse chine is where this spray rail is angled down and much wider than normal. The idea is that it should should trap water and air under the hull for lower drag.

The front end of a Boston Whaler is an extreme example of this feature.

I hope this helps.

Duncan
Good explanation Searider, got me thinking to how I couldnt quite explain it properly with out a diagram.

I did find one diagram though - check out this page near the bottom http://www.lowe.com/suncruiser/const...deck-boat.html

all the best
Andy
andy@rib-hire.com
www.spareribs.info
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