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Paul,
In Offshore Magazine a couple of years ago, Dave Gerr, the naval architect
and propellor maven, wrote about an amazing discovery in hydrodynamics
discovered at MIT by Dr. Loof Lirpa. If holes are drilled in the leading edge
of a propeller they act to increase thrust in much the same way as the slots
in an airfoil increase the lift. Numerous magazine readers hauled their boats
and drilled out their propellors. I almost did the same to mine until I noted
that the issue date of the magazine was April 1 and Dr. Loof Lirpa's name
spelled backward is . . . . ;-)
Larry Zeitlin
