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  1. #1
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    School Pjoject - Ben Hur Hydroplane

    School started last week and we have begun our major project this year in Advanced Materials Processing. As a class we are building a 60's style hydroplane called a Ben Hur made famous by Hal Kelly. I chose this design because it is wider than your average hydro, also more stable and buoyant. We are not looking to race but rather just have some fun testing on the water. The plans are also more affordable and can be built with locally attainable materials (we are on a budget).

    Rock was nice enough to donate a whole bunch of outboard parts including a late 70s's 70hp 3 cyl merc. We have stripped down the motor rebuilt carbs and fixed up whatever electrical components that were deteriorating. We anticipate the weight of the motor to be about 120 lbs (stripped down). We could probably drop it another 5-10 lbs or so if we delete the starter. Cold compression appears to be good and after some simple adjustments the motor popped off and actually idled. We slapped a 15" leg and lower from a merc 402 on and it bolted right up. We are in the process of adding a low water pickup so we can run the lower nice and high. By no means is this a race motor, but it it should make some decent power to weight and i think it will work if propped right and setup with proper weight distribution.

    As far as building the boat goes, we are in the process of gathering materials and setting up templates for the ribs. Since we are not looking to race the boat, ribs will be built either out of true 3/4 mahogany or mahogany surfaced down to true 1/2" instead of spruce lined 1/4" marine ply.

    I have experience with outboards, woodworking and some fiber-glassing but do not consider myself a pro as some of you are. Please feel free to make recommendations.

    Attached are some pictures of the start. Ill be sure to document future progress, looking forward to the build. Forgive me if these pics dont work, im learning here.&nbsp;&nbsp;<br><br>https://i.imgur.com/Wz4yFZd.jpg<br>https://i.imgur.com/yriCCey.jpg<br>https://i.imgur.com/DwQI9Lt.jpg<br>https://i.imgur.com/rnjpCzM.jpg<br>https://i.imgur.com/Gje2NJP.jpg
    Last edited by Seanj85; 09-12-2019 at 11:11 AM.

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  3. #2
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    Click image for larger version. 

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  5. #3
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    Thanks for posting this. Excited to watch the progress.

    Rock
    Team Junk

    No sparkling wiggles in here, only dump truck grinches.

    "Screamin Heathen"

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  7. #4
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    Coon Rapids MN
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    Can't wait to see this come together. Shop class was my saving grace in high school. Never built anything this cool though.
    '78 Hydrostream Viking/175 Mercury, restoration https://www.screamandfly.com/showthr...Viking-rebuild

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