2-50 BOAT HULL DESIGN 



Reouired thickness of angle , t = ^'su 1192 



_ - ^_ = m2S9 m. (2<32) 



Use 5 plies of woven roving, t = .185 (Table 5-2) 



Width of angle legs should be sufficient to transmit this same 

 shear load, i.e., 1192 lbs. per in. 



Ultimate shear stress, secondary bond, F fe = 800 psi 



Width of leg, b = Ijsu = 1192 = lM9 in> {232a) 



^bsu ° 00 



Use 2 in. x 2 in. for ease in handling. 



DESIGN EXAMPLE 2-4. CRUISING SAILBOAT 



This cruising sailboat represents a very popular size and type, providing reasonably 

 comfortable accommodations for four to six people. It is intended for cruising in unprotected 

 waters and for ocean racing with similar boats. 



Principal Dimensions - See Fig. 2-27 for details. 



Length, Over -all: 33 ft. - in. 



Length, Water Line: 23 ft. - 2 in. 



Beam: 9 ft. - 10 in. maximum 



Draft: 4 ft. - in. 



Rig: Sloop 



Auxiliary Power: 6 horsepower engine 



Summary of Scantlings 



Shell Basic Laminate: 1 ply cloth on outside of hull, 1 ply 2 ounce mat and 4 plies 

 woven roving. 



Bottom shell forward of Station 7 below longitudinal No. 2 similar to basic laminate 

 except use 5 plies woven roving. 



Bottom shell aft of Station 7, from 12 in. below longitudinal No. 1 to keel: similar to 

 basic laminate except use 6 plies woven roving. 



Framing: All stiffeners are hat type. 



Longitudinal No. 1 Bow to Second Bulkhead 

 Second Bulkhead to Stern 



Longitudinal No. 2 Forward of Bulkhead 5 

 Aft of Bulkhead 5 



Longitudinal No. 3 



Longitudinal No. 4 



