Minimum Planing Speed for a 23

[Bigshrimpin]

http://www.youtube.com/watch?v=aMQVI...ature=youtu.be

[77SceptreOB]

Probably a lot of trim tab and engine trim going on there.LOL! I thought it would have been a true inboard to plane at that speed.

[Bigshrimpin]

I got Bob's wedges on there and engine tucked all the way in . . . no tabs at all. Put her on the new to me trailer and decided to go for a spin.

[77SceptreOB]

Awesome pilot house! Is that one of Bil Potter's designs?

[CHANCE1234]

I took this last week of my 20 with a 115 2 stroke. Knots is in bottom left of GPS. Hope the link works. I think of planning as when the bow falls flat. That's what I gauge mine on anyway. Tim, is that how you determine when you are on plane too. What is the definition of when you achieve "on plane"


http://m.youtube.com/watch?v=9e-VQkXYayc

[McGillicuddy]

Looks great, Tim! Really like that dog house forward. Looks like a great balance. Post some pics of her just sitting. No stern squat there. No sir! !0 mph plane is fantastic, virtually unheard of on a 23, no?

[Bigshrimpin]

77 It's the seamark potter mini pilot console . . . I absolutely love it.

Chance I'm not 100%certain of the true definition of planing. I always understood it as the point where the stern wash separates from the transom and you climb over the bow wave until the bow falls flat. How do you like that 115?

Gillie - here's a pic drifting for bass.



Thanks gfs . . . the 400lb console with a 375lb engine . . . really balance things out nicely. I love this setup.

[Bigshrimpin]

77 It's the seamark potter mini pilot console . . . I absolutely love it.

Chance I'm not 100%certain of the true definition of planing. I always understood it as the point where the stern wash separates from the transom and you climb over the bow wave until the bow falls flat. How do you like that 115?

Gillie - here's a pic drifting for bass.



Thanks gfs . . . the 400lb console with a 375lb engine . . . really balance things out nicely. I love this setup.

[gofastsandman]

That`s insane Tim!. What an ace in the hole.

Balance is sooo underrated. If you go offshore, you will get caught in changing conditions.
There is a reason you see sailboats in the afternoon. It`s called wind.

I`ve seen a lot of interest in Big hp and 4 strokes lately. Yes, I said Big. This is an undeniable demonstration of what works best and why.

It is helpful to have an understanding of Bernoulli`s principle of fluid dynamics. Both wet and dry. Remember the balsa wind up planes. How much thrust does a rubber band produce?
The plane flies because of an understanding of weight, balance, and design. A wing does not produce lift, it merely moves from an area of high pressure to an area of low pressure.

A mass of air or water tends to remain constant. When outside forces change this constant,
they create changes in pressure that cause movement.

The old Porsche race cars dominated F1. They did not sacrifice weight for handling. They valued light weight. A 600 cc race bike is damn near as fast as a super bike, it is just that much more responsive.

As you chase more HP with the associated weight and balance changes, you have corrupted the original design intent.

Min plane speed can save your bacon. And your back and feet and knees.

Your choice,
GFS

[kmoose]

Originally Posted by gofastsandman

That`s insane Tim!. What an ace in the hole.

Balance is sooo underrated. If you go offshore, you will get caught in changing conditions.
There is a reason you see sailboats in the afternoon. It`s called wind.

I`ve seen a lot of interest in Big hp and 4 strokes lately. Yes, I said Big. This is an undeniable demonstration of what works best and why.

It is helpful to have an understanding of Bernoulli`s principle of fluid dynamics. Both wet and dry. Remember the balsa wind up planes. How much thrust does a rubber band produce?
The plane flies because of an understanding of weight, balance, and design. A wing does not produce lift, it merely moves from an area of high pressure to an area of low pressure.

A mass of air or water tends to remain constant. When outside forces change this constant,
they create changes in pressure that cause movement.

The old Porsche race cars dominated F1. They did not sacrifice weight for handling. They valued light weight. A 600 cc race bike is damn near as fast as a super bike, it is just that much more responsive.

As you chase more HP with the associated weight and balance changes, you have corrupted the original design intent.

Min plane speed can save your bacon. And your back and feet and knees.

Your choice,
GFS

I love the look of that pilothouse. My adoration for purpose design layout is peaked with your build. Very, very nice!

One of the beautiful things about the 23 is their ability to handle weight and still perform well. My Tsunami holds plane loaded at 14 knots with no tab in flat seas. Not really impressive #s but considering my normal dive load consist of 150 gals of fuel, 700lbs of ice, 8 steel tanks, dive gear, tower, at least 3 people and a 30" 250 4 stroke on a 12" set back bracket, I'm pretty happy with it.

Balance IS truely underrated but we can't always be light. Personally I don't think I pay any penalty for using a 4 stroke on my rig. Mine swings a 16" wheel at a lower gear ratio than similar 2 strokes. It adds a rediculous amount of stern lift allowing flexibility and compensation for load and sea conditions. I don't think I suffer much in speed penalty either. I ran my boat at the gathering lighter than I have ever in it's current configuration only gaining 1 knot on top end. Ultimately, if I could run lighter I would save fuel and have a more responsive ride, but my enjoyment comes from the things I do on my rig and it does it sooooo right for such a small boat.

Sometimes I think Potter had a broader scope of use in mind for the 23 design. He utilized just about every power configuration and weight distribution format available and all performed well. From the weight forward Tsunami/Sceptor to the CC and the rear weighted Seavette, they all ranked as top performers in their class.
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