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Shark skin traps air bubbles .....no stickshon (sp?) between water and bottom surface
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A bad day boating is always better than a good day inside.
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Okay now I remeber.Thanks again for the help.:cool-smiley-011:I'll keep ya posted
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Originally Posted by marylandmark
(Post 2388314)
What is a notched transom and why is it good/bad?
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The notch is the area plugged in the mold it. It shortens the running surface, allows drives to be mounted higher and makes the bow run lighter.
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Originally Posted by MOBILEMERCMAN
(Post 2387822)
A bad day boating is always better than a good day inside.
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Its still better boating, besides if it was going to break waiting a day or two doesn't make it any easier.
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Originally Posted by Audiofn
(Post 2387114)
Yes but on the smooth side the tile will slide from side to side much easier. America's cup boat spend more money on speed then anyone and they no longer sand the bottoms they make them as perfectly smooth as they can.
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1 Attachment(s)
Originally Posted by Enforcer2
(Post 2387794)
I have heard of and tried different size pitchs on outers and centers. The problem with outeres being so high is when you turn boat they will cavitate. I went to four blades and problem was non existent.
25" centers would be a lot easier to find. I want to keep the top of engine cowlings as close to even with each other as possible. Here's a pict of a new Homeland Security Midnight. 52 ft long.... jackplates..:cool-smiley-011: |
Enforcer2;
I'm going to ditto the info from MOBILEMERCMAN and add this... Ultimately you will check your height by doing your slip calulation. If your percentage slip is much greater than about 15%, than you know to lower that motor. On a VEE I would try to get the props as close together as possible. I remember when people used to angle the motors on the transom to get them closer at the prop. |
Originally Posted by open72
(Post 2388751)
LOL:grinser010: I've actuall seen one continious jack plate or trips on a Deep Impact |
2 Attachment(s)
This picture is really what I am interested in knowing.
This is an Apace and I know there are obvious differences. water pickups on transom (CAN get for Outboards), surface propellers( Chopper or Cleaver Props for outboards ), HD drives and tons of Torque (thIs I can't come up with :p:(.) But the realtionship of where the prop shaft is to the notch and the v on the bottom is really what I am after. SEE PICT and tell me what u think. Thanks again everyone for the help....:cool::drink:...........Tony |
Are you trying to compare apples to oranges?
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No...of course not but in relationship to the drive height and the notched transom how can I take advantage of my set up and how high should I go.
Do I run prop shafts even with bottom as before with the non notched transom or can I go as high as the above pict and actually see an increase in speed without sacrificing everything else. It is nothing new for outboards to run much high er than your conventional stern drive boat: IE jack plates in conjuction with chopper props and low water pick ups. |
Tony, Do you have a rear angle picture of the stern?
As you now that hull has been a round and dialed in again and again. In short you can only raise the drives as high as you can get the props to carry the boat. The faster the boat the less you have to carry. That picture is probably of a 100 mph plus, maybe 110 mph plus boat. Different things apply as speed increases. What works at 80 is not what's best for 100 and vis versa. |
gotcha, 100......would be nice:D
I will just have to do as you said ....a lot of trial and error. Just thinking in comparison purposes. I have looked at some lighter..much lighter by about 7000lbs and noticed that they are running their lower units pretty much like the Apache. They are also 100mph boats thought, but they are outboards-hydrostreams. And also not in rough water. |
Tony, I posted on your thread I have the templates your asking about PM me with your address and I will send them to you. As far as your heights work from the homeland boat raise the centers 1 or 2 holes and see what you've got. If all is well raise them some more. Take lots of notes and calculate your slip, Have different props on hand. And the beat goes on.
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Thanks, really apreciate info:D. All PM u with address for templates
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They are the same and both notched. If it was not notched the transom would be one plane and it would form a V to the lowest point.
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Originally Posted by open72
(Post 2388751)
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that's alot of boat!:eek:
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Originally Posted by fredefox
(Post 2387631)
I have considered trying to create an "air hockey table" type bottom on the last 3 to 4 feet of a v bottom boat. Use a small engine/pump to pump air under boat at high speed to reduce drag. Maybe, I have to much time on my hands during these long cold winters.
Guess the next problem is "my" system increases air drag on the boat, whereas "your" system just uses a tiny amount of horsepower to operate the pump. |
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