Re: Grumman Boat Photos
nhangler sent me this great tidbit on the Grumman 5.0
"Found this write up on the Grumman 5.0. Figured I would share...
"Yachting / January 1982
New Boats
The Grumman aluminum 5.0 meter center console fisherman was designed for stability, speed, and good rough water ability by Bill Shaw, who is well known to sailors for his Pearson Yacht; designers. Though she has some resemblance to a 4.6 meter model he designed previously, she isn?t a blow up but is all new in hull form.
Considering the extremes of the flat bottomed hull, which is the most stable and fast on flat water but a wet pounder in rough water, and the deep V hull is 20 degree or greater dead rise, which is least stable at rest but stable, fast, and relatively dry and comfortable in rough water. Bill originally opted for a V bottom hull with constant dead rise of 17 degrees from the turn of the bow to the stern as a good compromise. However, a prototype that was built proved less than desirable as an all around boat, so a model with a 12 degree dead rise in the planning area was built. As opposed to the deep V hull, she sacrificed some speed, directional stability and keeping ability in rough water, but she still proved good in all those departments, had greater stability at rest, and was capable of higher speed with the same horsepower in moderate conditions. This hull then sent into production as the Gurmman 5.0.
Constructed of marine aluminum alloy, the 5.0 has two frame members in each side and 15 transverse members in the bottom for strength and rigidity. The .070 sheet in her side and bow areas is stretch-formed, as is her one-piece .090 stern and keel member. Her skins are fastened closely spaced rivets, and pvc foam table is used in the joints with sealant.
Overall dimensions are 16?10? with a 7?6? beam and she?s 33? deep amidships. She weights 853 lb. and is BIA-rated for 100HP and a maximum capacity of 1600 pounds. Her 20.5? transom is deigned for long-shaft motors and has the strength to take twins. Is company and motor manufacturer tests with one person, a battery, two six gallon fuel tanks, and standard safety equipment, she did 43MPH with a single 90HP outboard, 37 MPH with a 75 HP, 21MPH with a 35 HP, and 16MPH with a 25 hp. Twin 50HP motors drove her at 40MPH.
We rode a Grumman 5.0 with a 90 hp Evinrude in a short; steep chop on Lake Michigan and found her to be stable, relatively dry, and highly maneuverable without alarming heel. No planning outboard flying at high speed off of a two-foot wave is going to set you down without a jar, but she compared well with the best of them.
The console of the 5.0 is of all welded aluminum construction with built in stowage. Forward, there?s stowage beneath a raised fishing platform that is reinforced for an optional pedestal seat. She also has a bow locker. Standard items include a fish box under the helmsman?s seat, an ice chest seat forward of the console, and rod racks to port. Foam strategically placed in the sides and bottom provides positive floatation; she?s been swamped and run dry through bailing ports.
The Grumman 5.0 is also offered as a side console model, and at this writing each boat is priced at $4950.
For details, contact Bev Brown, Gengeral Sales Manager, Gurmman Boats, Marathon, NY, 13803"
Thanks nhangler! Great find!
