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On 27 Aug 2005 20:43:14 -0700, wrote:
NEVER been a gas explosion on an A-4, impressive. BTW, what sort of
fuel economy do they get?
I once heard a rumor that old Farmall Cub tractors used an Atomic 4
engine, true or not?
I have a two-blade, 12 x 6 RH Michigan Wheel prop that I polish every
spring. I have a rebuilt in 2003 1973 Atomic 4 in a Viking 33 (10,000
pounds or so) and running at a hair over one-half throttle I go 5.8
knots in a flat sea at about 1,900-2,000 rpm. I go through 0.73
Imperial gallons/hr. or 0.877 U.S. gal/hour.
I can extend this to approximately one gallon per hour if I throttle
back to 4.2 knots or so.
Knowing this means that I actually REDUCED my gas tank from 12 Imp.
gallons to 11 U.S., or about by one-third capacity when I recently
replaced the whole fuel system. Now I have more space for sheets, etc.
in that locker. My range falls from about 100 NM or 24 hours at 4
knots to about 75 NM or 18 hours of straight motoring.
If I lashed a six-gallon outboard tank on deck, I would gain about
eight more hours at cruise speed. That would put me at the other end
of Lake Ontario, FWIW.
Let's just say since July 31, I've used two gallons, so I don't worry.
It's a sailboat, and the Atomic 4 is very reliable in my experience,
and would have been more so if I had properly diagnosed a faulty water
lift muffler earlier on in lift.
R,
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