Real World R-27 Performance and other stuff

yurt

New member
Joined
Apr 27, 2018
Messages
4
Fluid Motion Model
C-28
Hull Identification Number
USFMLT2753A9
Vessel Name
Yurt
MMSI Number
338332731
We picked up our 27 in May near Pensacola, Florida, and began our trek home – through Mobile Bay, up the river systems, through Chicago, and around Michigan to our home on Harsens Island, just north of Detroit. We traveled 2216 miles, mostly uphill. We burned 1157.8 gallons of fuel, giving us an average of 1.91 mpg. For about 1300 miles of the trip, we faced currents of 1 to 5 knots. Our best fill up averaged 2.8 MPG while our worst was 1.4 mpg.

We were loaded down with gear, living on the boat for 3 months. I figure we weighed in at 9000+ lbs., during our adventure.

We found that running the boat at 1800 rpm or 4700 rpm offered the best economies, in between you just seem to be pushing water.

Now some other items. TIGHTEN EVERYTHING. We had a fuel leak to the generator that just needed a fitting tightened. We had a propane leak that needed same. We lost our steering in Lake Huron as a fitting came off of the steering cylinder at the engine. This required a tow, some hydraulic fluid, and some time to bleed the system. Near Traverse City, the transducer cup came loose from the hull, leaking fluid and rendering the unit unusable. This I repaired when we got home, cleaning the bottom very well and, using a marine epoxy, re-glued the cup down and placed the transducer back inside with fluid.

The boat performed well and got us home in spite of us going the wrong way in the wrong year as shown by the intense flooding up and down all the river systems we were in.

Other than some cosmetic gelcoat crazing on the starboard side and on a corner of the swim platform, she came through unscathed.
 
That sounds like an epic journey for a maiden voyage! Congratulations!
 
Thanks for sharing and congratulations on an epic voyage!

For interest, your performance sounds typical. What was the speed at 1800 and 4700 rpm? I don't know if anyone has plotted any two way average rpm/speed/fuel consumption curves for an R27 but it would be fun to see how your heavily laden vessel compared.
 
At 1800 we were going about 8 mph at 3.8 mpg, depending upon current. At 4700 we were going about 28 mph getting 1.6 to 2.1 mpg, again depending upon current.
 
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