Gerrs Roll Period Recommendation - Boat Design Net Gerr includes a version of the "captain's formula" in his earlier article on p 9, though he doesn's use that name t=0 44*B (ft) GM (ft)^0 5 It is interesting that Gerr's formula has a fixed coefficient He says it "will provide a close estimate of roll time for any vessel of normal form" That brings up the question of what's meant by "normal
EfficientPowerboat02 - Boat Design In the previous article we looked at the fuel consumption and range of early offshore powerboats, and began our examination of powerboat efficiency, by using transport effi-ciency and miles per gallon to compare boats We saw how longer more slender hulls could be moved farther faster for the same amount of fuel Comparing different hull forms normalized for displacement, we also saw that
Dave Gerrs Offshore Skiff - Boat Design Net Regarding Gerr's Offshore Skiff, I've been wondering if in making a dory a planing boat, rather than a displacement hull shape, are the seaworthy characteristics lost
Simplified Scantling Formula | Boat Design Net Bases for Gerr? Thanks for the notes, I am familiar with Gerr's book but I have no idea what it is based upon He relates the scantlings to LOA, Beam and draft plus freeboard This would work as a rough value but I dont know if it is derived from something or rooted in his own experience
The Dave Gerr Method - Boat Design Net Hi, Does anyone know the factor of safety that Dave Gerr implemented into this " elements of boat strength" scantling determination book? As I