Boat hull with tunnel structure
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United States of America Patent
Stats
-
Apr 8, 2003
Grant Date -
N/A
app pub date -
Oct 10, 2001
filing date -
Oct 10, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A boat hull having a tunnel structure along the bottom of the hull in the form of a truncated hollow partial cone indentation parallel to the keel of the boat. The tunnel has a truncated end attached to the bottom of the hull near the keel and an open end attached to the transom of the boat. The tunnel encloses a propeller shaft extending from the boat interior at the truncated end, the propeller shaft, a propeller and a rudder. The angle of the cone with respect to the keel places the propeller about 45% to 50% within the tunnel at planing attitude or speed. The combination of the tunnel placement along the hull and the axis of the propeller shaft increases the efficiency of the boat and reduces fuel consumption.
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