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As the reed main replacements near completion, I decided to make a new tower housing casting. The Jones tower sets the motor back about 3 inches. This does two things, first it moves the entire unit behind the steering pivot point which eliminates any servo assist to the steering, and second the arc path of the prop is increased to the point that the steering radius is severely limited. The unit has to be kept deep in the water to clear the bottom so as not to notch out the bottom of the boat. The increased length of the twin pinion compounds the problem. I can, with this new housing and some mods to the unit, move the pivot to within 5/16 of an inch of the standard position.
In the first picture you can see where some prop work had been done on the bottom sometime in the past.
I will add to the forward end of the adapter plate casting pattern, an upper pivot boss and recast.
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Very nice! And I spy a 75H tower and foot :D. Question, so this boat is not setup for a surface piercing prop? I don't see how it could with the way the boat comes back on both sides.
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That is insane, welder, machinist now woodworker?? come on, there isn't much you can't do.
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I'm being blown away all over again.
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These are cabover boats, The proper set of the cabover is to set the aft of the boat level with the world. Set the engine on the boat tucked under 6 degrees. Set a line from the aft bottom. level, to the sponson. The line will be above the sponson. Measure the distance from the line to the bottom of the sponson. Set the motor height so that the center of the prop shaft at mid prop hub is the same distance below the aft bottom.
When the boat is running the aft of the boat is 4 to 6 inches off the water and planes on the bottom of the gear case. Run a 7 degree rake prop for 1 degree bow lift. and this is what it looks like: On the trailer with the 6 degree tuck under and what it looks like coming at you. At speed the sponsons are off the water and you are riding a bubble of air. I think these might qualify as surface piercing.
My wood working did start on page 1 of this post.
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Hi Dick, I have been trying to get in touch with you by E mail, I have some stuff for you. Steve
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Been a few days since my last post. Project still in process, just moving slowly as we try to find our way through 110 plus inches of snow. No place to even pile it anymore.
So much for that. I have posted a few more pictures of the tower housing pattern. Hope to finish that this weekend and get it off to the foundry. The center main has been completed and test fit on the crank. Need to finish fitting up the spiral lock rings that hold the two halves for assembly to the crank. That will be for a later post.
Hope spring comes soon. Looks like we could have snow into June before total thaw.
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Simply fabulous!
Think Hillsdale, September.
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Reminds me of the two wooden pieces Harry Pasturczak made to have a company cast two pieces to be fitted together to make a venture safety device for our vacuum trucks. My Dad got a patent on it and had them made at a sheet metal place until he met Harry. After they got to be good friends Harry said he could have them made of cast aluminum, and my Dad had 250 sets made. Harry gave my Dad the wood pieces after it was all over, and they were painted silver. They were stored on a shelf up at his pump house for many years. I would occasionally look at them and be amazed at not only Harry's work, but exactly how they fit into the picture. Now I am seeing the type of thing Harry did to get to the bottom line of the aluminum castings. Thanks very much for the posts Richard.
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Where this project is concerned, "fabulous work" is the new normal.
Jeff