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Subject: TWL: Willard Fuel Consumption
From: Pisciotta, Peter P, RTLSL (pisciotta@XXX.XXX)
Date: Fri Nov 01 2002 - 12:59:28 EST
I took a quick poll of the Willard Boat Owners to see actual consumption
figures, not theoretical With the exception of a recent delivery of a new
Willard 40 that ran at SL - 1.35 (8.1 knot avg over 1250 nms), most Willard
owners run their boats at SL = 1.2 (7.2 knots for the Willard 40; 6.9/Willard
36; 6.0/Willard 30). The W36/W40 data is primarily for open ocean conditions
from Alaska to Mexico. The W30 data is a mixture of protected and open waters.
I know of a couple Willards out cruising and I hope to get their consumption
data when they return, but it could be a couple years.
At or close to SL = 1.2:
WILLARD 40 (34,000 lbs): 1.5 gph at 7.1 knots; 4.7 nm/gal average
WILLARD 36 (28,000 lbs): 1.2 gph at 6.8 knots; 5.7 nm/gal
WILLARD 30 (16,000 lbs): 0.8 gph at 6.0 knots; 7.5 nm/gal
These are averages for about a dozen reports with some minor interpolation on
my part to get an "apples to apples" comparison for slight variations in
reported speed.
As an interesting data point, one Willard 36 owner reported cruising at 6
knots and burning 0.8 gph - the same as a W30. This observation is consistent
with similar experience aboard the Nordhavn 40 round-the-world boat. A
Nordhavn 62 accompanied the 40 on a long leg in the South Pacific. The N62
throttled back to "buddy boat" at 7-1/4 knots or so. Over 1200 nms, both boats
burned close to the same amount of fuel.
There were also two recent open ocean trips by new Willards that have very
accurate consumption data:
WILLARD 40: (Seattle - Long Beach delivery, 1250 nms) 2.25 gph at
8.1 knot average(SL=1.35!); 3.6 nm/gal
WILLARD 30: 0.9 gph at 5.85 knot average. As some may recall, WILLIE
skirted Tropical Storm Arthur on the return so their
progress was hampered. On the trip to Bermuda, WILLIE
averaged 6.1 knots at 0.85 nm/gal trailing paravanes
most of the way I believe.
As an observation, there is a ton of "urban legend" about fuel consumption on
trawlers. "Efficiency" seems to be some sort of holy grail for trawlerites,
and much of our slow cruising from marina to marina in protected waters lulls
us into inadvertently optimistic calculations. Open ocean efficiency is
different - average speed drops and consumption increases. Willards have been
going to sea since the introduction of the 36 footer over 40 years ago in 1961
(there are reports of trips to Mexico, the Galapagos Islands, Hawaii, and
Panama Canal transits in the 1960's). Bottom line: Willards are one hell of a
sea boat. Krogens and Nordhavns have more interior volume (Willards are
double-enders after all), but there are trade offs - there's no free lunch.
Peter Pisciotta
For more info on Willards, check out
http://groups.yahoo.com/group/WillardBoatOwners
Willard 36 Sedan, San Francisco
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