question on hull design for the experts

[chicken louie]

hi <br />i have a 1976 erude 55 horse with a jetco jet leg.<br />my question is what would be the most efficient hull design be for rivers in the medium to large size range.<br />allso i would like lots of room and allso carry three adults and some gear.<br />we fish the skeena river in b.c.(large) and the red deer river (medium) mostly its just me and the wife but occasionally i have a couple of kids.<br />most of the time we fish from shore but would like to anchor in the skeena to fish with hot shots for spring salmon.<br />would like to have some speed aswell. to blow my buddy out of the water,lol.<br />thanks to all who reply.

 

[JB]

Re: question on hull design for the experts

Moving to Boats

 

[Elk Chaser]

Re: question on hull design for the experts

Rounded Semi V hull.

 

[JasonJ]

Re: question on hull design for the experts

It depends on how uncomfortable you are willing to be. The flatter the hull at the transom, the less power you need. You pay the price in comfort and stability at speed. If your water is mostly flat, then you don't need a lot of deadrise (the measurement in degrees of the V at the transom). If your water has 1 foot or more chop, farily consistent windy days, then you need more V at the transom. You'll sacrifice speed for comfort though. Its all give and take. If it were me, an aluminum semi V would probably get it done. Its fairly flat at transom, has decent entry, but it won't be that comfortable. Also, aluminum is lighter, which equals more speed and durability. Good luck...

 

[18rabbit]

Re: question on hull design for the experts

Originally posted by JasonJ:<br /> ... The flatter the hull at the transom, the less power you need. ...

Hey Jason - I thought this applied only when on plane?!?!? The flatter the hull the more power is needed to maintain speed in anything other than flat water. The more chop there is the more power you need to add, the more you are a candidate for a deepening V.

 

[JasonJ]

Re: question on hull design for the experts

You are generally still on plane when running through chop, the difference would be that the flat hull would pound you to death and could ventilate the prop easier verses a more pronounced V that would tend to cut through and keep the prop in the water better. I don't think a flat hull running on plane through chop is presenting more load to the engine, its just uncomfortable as all heck an can be more unstable, especially in a hard turn while in chop. Obviously there are a billion variables, which is why the decision should be based on the conditions the boat will most often see. If he is going to be in constant heavy chop, a flats skiff isn't going to cut it, nor will a deep V be necessary in waters that are flat calm most of the time.