by Wm D Jackson
Thunderbolt was designed for high speed operation, to be powered with outboard motors ranging from 15 to 50 H.P.
With its stepped bottom and wide convex after plane it will propel with correspondingly greater speeds as the power is increased. If the largest outboard motor available—the Evinrude Big Four, rated at 50 H.P.—is used upon Thunderbolt, four passengers can be planed at a breathless speed and with one person aboad Thunderbolt powered with this motor the speed can approach the 60 M.P.H. nark. Trim and able design makes Thunderbolt fast, sporty, and safe with one or four passengers abroad. The hull banks on turns nicely and due to its new but fully tested bottom design, it can travel faster than any comparable boat design in existence, Thunderbolt under trial with various motors was found to handle quite well over rough or smooth water riding somewhat softer than ordinary planing boats. This is due in part to the deep forward plane that eases the boat over waves while the larger after plane handles any motor from the smaller 15 H.P. models up to and including the Big Four rated conservatively at 50 H.P. The specifications of Thunderbolt show it to be a capacious hull 13’ 8” in length with a beam slightly over 5’. The completed weight of this hull will approximate 275 lbs. and will comfortably seat five persons. The plans give details for easily made attractive seats and backs that gives Thunderbolt unusually comfortable passenger accommodations. This trim and sporty craft may be built in the homeworkshop and Thunderbolt was thoroughly tested by the designer with motors varying from 18 to 50 H.P., the speeds ranging from 15 to 60 M.P.H. Everything in the design has been proved and is offered to the prospective builder as a step ahead of anything on the market.
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