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Old 02-03-2017, 11:41 AM   #1
sdowney717
Guru
 
City: Seaford Va on Poquoson River, VA
Country: United States
Vessel Name: Old Glory
Vessel Model: 1970 Egg Harbor 37 extended salon model
Join Date: Jan 2016
Posts: 2,185
On a semi displacement barnacle fouled hull, how much slower?

I know a planning hull a lot slower than semi or full.
I would think a full displacement which already moves more slowly, it won't have as much affect as a planing hull but still noticeable.

Anyone have observations they can share?

What % drop in speeds would you think for each type hull if hull is fouled but prop is clean?
What % increase in fuel usage?

My semi-displacement hull is somewhat fouled, I am onto my 3rd year, I splashed in fall 2014.
I have been thinking to haul spring 2018.
When the water warms up, I want to get under there and clean off as much as I can.

Thinking good gloves, a flat hull scraper like what you normally use when hauling out, mask and a hood to protect my head.
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