The vessel hull is to be of all welded and crimped construction aluminum plate and extruded aluminum structural members. The motor stand and propeller cage is to be of all stainless steel extruded members. Particulars of all aspects and components of the vessel follow in these specifications. The vessel to be built with accepted marine/airboat construction practices and in accordance with all Federal CFR, USCG, State and Parish regulations. General design and engineering of the vessel should be to standards to accomplish the vessel’s intended use for long term operation. Hull: The hull is to be all welded aluminum and meet the following guidelines LOA: 15’0” overall length excluding the grass rake. BEAM: 8’ overall width at midship 1. Hull plate will be 5086 H116 marine-grade aluminum; only 5086 H116 marine-grade aluminum will be accepted. Dual certification alloy will not be accepted. 2. Hull will be rounded chine style utilizing 8 crimps. Four per side rounded chine style. 3. Bottom of hull shall not be flat. It shall have an overall 1” convex dome when the hull is inverted. 4. Sides of the boat will be 32” at the transom and taper towards the front of the boat to a height of 27” where the rake starts. 5. The following will be constructed from 3/16” 5086 H116 only aluminum plate: a. Bottom b. Transom c. Fantail d. Bulkhead e. Head Block 6. The sides and deck will be constructed from 1/8” thick 5086 H116 aluminum. 7. The gunnels will run full length of the hull including the fantail and be aluminum extruded gunnel piece bulbed flat top 2” width. 8. The boat will have seven aluminum T-bar longitudinal runners welded in place on interior, Five: 2” x 2” x ¼” and Two: 2” x 2” x 3/8”. The T-bars will be spaced evenly on the hull bottom. All T-bar to be pre-rolled to the contour of the bottom before welding to the hull bottom. The two 3/8” runners will be positioned at 14-3/16” off centerline both port and starboard so the overall spacing between these runners will be 28-3/8” and to accommodate the bottom brackets of the motor stand. 9. The hull will have one cross brace constructed of 2” x 2” x 3/8” aluminum T-bar horizontal transverse element and 2” x 2” x ¼” aluminum T-bar vertical elements. Both joined by 3/8” aluminum 5086 H116 plate bolted in place shaped and contoured to eliminate a trip hazard. The cross brace T-bars will be fastened in place across the top of the longitudinal by way of 1-½” x 2” x ¼” angle clips and thru-bolted. Cross brace to be positioned in the hull at amidships forward of the motor stand 75” to 77” from the transom. Placement of this cross member should be calculated by the builder to provide maximum structural support under all conditions, and maximum performance of the vessel. Position of the motor stand in the vessel to be determined by placement of this cross brace at the 75” – 77” position Motor stand and hull cross brace to be positioned 35" from the front of the engine stand to the aft bulkhead of the fore deck. This space is needed for the placement of a high pressure chemical spray pump system. Sprayer measures 32" x 40". 10. A 108” length of 2” sch. 80 aluminum half pipe will be welded on outsides of boat port and starboard along the third crimp from the bottom up and from transom forward. This will be welded to the vessel in such a way that it shall not interfere with the required height of the polymer. End of the half pipe tapered and half pipe fully welded.
