Conventional V-bottom hydronamics question..........
12-31-2007, 03:34 PM
#121
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I'd rather stay home than break a drive or engine!
12-31-2007, 07:26 PM
#124
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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.
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..
01-01-2008, 07:40 PM
#125
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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.
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.
I've actuall seen one continious jack plate or trips on a Deep Impact
01-01-2008, 08:55 PM
#127
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Join Date: Nov 2004
Location: Ocean Pines, Maryland. Wish I was at MANGOS in MIAMI!
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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
.)
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....
...........Tony
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
.)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....
...........Tony
01-01-2008, 09:35 PM
#129
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Location: Ocean Pines, Maryland. Wish I was at MANGOS in MIAMI!
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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.
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.
01-01-2008, 09:43 PM
#130
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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.
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.
