Dec 31, �� There are a few problems with tunnel hulls: One is that they will draft a bit more because you loose water displacment area with the tunnel. Another is that most tunnel hull boats are slower and require a jack plate which is more $$$. The dual-sponson tunnel hull traps air coming in from the bow and compresses it towards the stern, causing you to ride on a cushion of air. As a result, the total wet planing surface area is next to nothing, creating a smooth, stable and fuel efficient ride. Sharp turns are no problem in these surface effect boats. Dec 13, �� Cleve Ford, owner of Dargel Boats Inc., disagrees, saying the boat design isn�t the problem. �Since this company has been in existence starting in .
Hey guys, I'm having problems with my 18ft JonBoat. I bought an 18ft G3 JonBoat with tunnel hull and 60HP Yamaha outboard motor last year and I have � I bought an 18ft G3 JonBoat with tunnel hull and 60HP Yamaha outboard motor last year and I have always had problems when getting onto a plane. In order to get on a plane, I need to slowly increase throttle so that the motor doesn't kick out. When I give it too much throttle too fast, the motor stops pushing water and just spins out.� There is a lot of additional planning lift in those BMcF, Mar 7, # Find articles on wooden boat, classic boat, boat repairs, boat paint and more.� foot tunnel hull boat built within one year at the high school. It is now near completion with a jack plate, steering wheel and throttle as well as a Evinrude Fastwin 15 horsepower. A tunnel hull Jon boat is a type of Jon boat designed for high speed use in shallow water. Unlike traditional Jon boats that rely on manual propulsion in very shallow waters, tunnel hull Jon boats can use a motor in shallow water. Tunnel hulls can give Jon boats an �air lift� to get the boat on plane and help it reach speeds of 50+ mph. Contents. Tunnel hull Jon boat design. Its design allows motor use in shallow water. The unique tunnel hull effect. Tunnel hull Jon boat benefits.� Tunnel Jon boats are a way to overcome this problem. A tunnel hull Jon boat gets its name from the unique tunnel-like feature that is positioned centrally at the aft on the bottom of the boat. This unique feature means it is easier to get the boat on plane quickly so it can literally sit on top of very shallow water.
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