Flat Bottom Duck Boat Plans Zero
It takes a ton to set it 4" down in the water, and I expect the empty hull might weigh pounds. If you had a long shaft motor and could build up the transom for it I think the Coast Guard type of capacity rating would be about two tons. Interesting to design such a beast. Lots of traps I think. Almost all involve the huge flat bottom, always a problem. Hey, Flat Bottom Duck Boat Plans Zero Flat Bottom Duck Boat Plans Zero that brings up another point about these things.
The Coast Guard would give a low power rating to wide flat boats like this because they are nasty handlers. And even in its lightest state it would take 20 hp to run it on plane. Powering Jon A simple 20' jonboat. The bottom is a constant 6' wide and the empty hull shell might weigh pounds. The hull depth is 2', the transom is shown for a short 15" shaft motor but there is a motor well in front of it which goes to the hull's top Flat Bottom Duck Boat Plans Zero Flat Bottom Duck Boat Plans Zero so a 15" wave over the stern won't flood anything, it would take a 24" wave to go over the bow, sides or stern.
I go straight Duck Zero Plans Flat Boat Bottom to a Coast Guard publication for this now. I don't guess at it. I suppose a long time ago an expert wrote the pub and you can go ahead and pick at the methods if you want. But I follow them. They don't make totaly sense in every way but what are you gonna do when giving guidelines to the public.
Twenty years of dealing with the Free Flat Bottom Plywood Boat Plans Red public has shown me that many highly educated people refuse to do any math at all. So you won't be bothered multiplying hull length times hull beam I don't really know if these Coast Guard max calculations have any legal value. I assume they are guidelines. But every factory boat will be placarded with such a number and I doubt if any good shop will fit more power than the recommended.
First, take overall length, 20' here. Then take max stern beam, 7. Multiply to get the "factor", that's for the Jon Then the publication has charts that conjure up the max hp allowed, in this case for a hard chined flat bottom it is about 55 hp.
The old rule that I think you can bank on is if you want to plane you need a hp for each 50 pounds afloat. Now this boat is made from a Flat Bottom Duck Boat Plans Zero pound pile of plywood and the finished bare hull out to weigh about that. Let's add say pounds for a minimum motor and maybe 50 pounds of Bottom Duck Zero Flat Boat Plans fuel and 50 pounds of general gear and maybe pounds for you and you are Flat Bottom Duck Boat Plans Jacket floating pounds. That would be about the minimum weight the boat would ever Flat Bottom Duck Boat Plans Zero Flat Bottom Duck Boat Plans Zero be used at. Apply the old rule and you will need 20 hp to Flat Bottom Duck Boat Plans Zero have a chance to plane it.
But this is a bit boat that can easily swallow another half ton of stuff. Then you need 40 hp to plane with any margin at that heavy weight. The old rule about non planing power Flat Bottom Duck Boat Plans Zero Flat Bottom Duck Boat Plans Zero Flat Bottom Duck Boat Plans Zero is a horse for every pounds. So 4hp would suit.
Why have such a big boat with such small power? I worked at a marina where they Flat Bottom Duck Boat Plans Zero had a big aluminim jonboat, maybe a Lowe, a fine job, which they would Flat Bottom Duck Boat Plans Zero rent to big family groups. It had no more than 10hp and would not plane so it was safe when Farmer John brought his family out to the lake once a year. Later we used the big jon as a work boat and the little motor was great. It was so big and stable that you would rather work from it than from a dock.
I think I'm getting a lot better at this than I used to be. The Hullform data and the measured drag more or less agreed, much to my surprise! Even the best Flat Bottom Duck Boat Plans Zero props only allow you to convert half of your rated hp into thrust power. Ok, horsepower is to me a measure of pushing a force at a certain speed. In the dictionary one horsepower is pounds times feet per minute. So just imagine your horse pulling on a wagon with a drag of pounds at feet per minute about 1mph and you are watching a horsepower in action.
They said the usual work horse could do that for 8 hours, go home, and Flat Bottom Duck Boat Plans Zero Flat Bottom Duck Boat Plans Zero come back and do it again the next day, etc. I'm thinking trained human atheletes can put out a full horse power for maybe an hour at a time, more on steroids. But most of us are good for maybe an Flat Bottom Duck Boat Plans Zero eighth of that. I suppose a racehorse might put out ten hp for a lap. At least by going through all the apples to oranges conversions you can Flat Bottom Duck Boat Plans Zero pick a point of the Hullform curve and say it takes X horsepower to get there.
But remember that X horse power on that curve is thrust at the prop, and to get X delivered by the prop you need a Bottom Duck Flat Zero Boat Plans Flat Bottom Duck Boat Plans Zero powerhead that puts out about 3X. The "hp" lines have already been given the 3 factor, thus the 30hp line here will actually calculate out to 10hp if Flat Bottom Duck Boat Plans Zero Boat Zero Duck Plans Flat Bottom Flat Bottom Duck Boat Plans Zero you run the numbers on the chart. Such is life! Well, it all makes Flat Bottom Duck Boat Plans Zero sense to me. At the low end 5hp will push all of the weights Flat Bottom Duck Boat Plans Zero to "hull speed". And it takes 20 to "plane" it with any margin in the lighter weights.
At pounds 20hp won't really be enough. It looks like 25 knots will be about the max speed you could have with the Coast Guard max motor and that sounds reasonable too. Best of all, the Hullform professors have to me proven once again the validity of that "50 pounds per hp" Flat Bottom Duck Boat Plans Zero rule. Toggle menu. Login or Sign Up. Shop Shop. Cleats View All. All Paddleboat Hardware Footbraces, Rudders, etc. Paddles, Leashes, Clips, etc. View All. All Sailmaking Supplies Hardware Misc.
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