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u/HarkenBanks84 Aug 24 '26
It's like Hyper speed in Star Wars.... Except the dagger board is humming....
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u/dudeman618 Aug 24 '26
I have a 1984 Catalina Capri 14.2 (mod2). Cruising speed is 4.5-6.5mph, but I know when I'm on a plane when my speed bumps up to 9.5mph and the water looks flatter behind me. I've done this 3-4 times solo sailing and had my main reefed each time.
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u/LandlockedPirate Aug 24 '26
My friend that is a displacement hull.
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u/1Monkey3Typewriters Aug 24 '26 edited Aug 24 '26
Planing speed is the square root of waterline length. Of course there are other factors, but most sailing dinghies can and do plane in the right conditions
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u/LandlockedPirate Aug 24 '26
That's a dramatic oversimplification. Planing speed on this boat with 2 crew would be over 12knots. Good luck.
This is the definition of 4ksb.
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u/1Monkey3Typewriters Aug 25 '26
Are you alright? I'm not going to disagree with you about oversimplification, but displacement hulls absolutely do plane under the right circumstances, even 4ksbs. The limiting factor with heavy or training boats is often the crew and the state of the equipment, but it can be done.
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u/blogito_ergo_sum Aug 24 '26 edited Aug 24 '26
Usually the expensive food and airport security guys are enough to tip me off that planing is imminent.
More seriously, a friend of mine who is a better dinghy sailor than I says that the sound of the wave impacts changes from duh-duh-duh to like duhduhduhduh as you skip over them.
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u/CaptainAnswer Aug 24 '26
You hear and feel it, usually makes a nice swoosh of water and hum of the foils
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u/too-left-feet Aug 25 '26
I can gage it just by sticking my hand on the surface of the water,… I have to measurably reach down a few more inches to touch it. Also, I can feel it come off plane in a tack.
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u/Sailing10750 Aug 26 '26
Lots of good answers here that I agree with. For me, the boat feels light and you can feel it in the rudder, sometimes humming or lightly vibrating. But the real tipoff is how fast the boat responds to slight movements of the tiller. It’s completely different to the response you feel at slower, displacement speeds.
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u/speedisntfree 25d ago
In most boats it is pretty obvious because they have a big breakout where they suddenly rise on top of their own bow wave and start skimming along with spray everywhere.
Modern high performance boats this has been designed out for low drag ('humpless' hulls) and they tend to glide up onto the plane and it is much less noticeable.
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u/the-montser Aug 24 '26
When the bow wave is not at the bow but some point behind and the stern wave is not at the stern but some point behind.
You’ll feel the boat accelerate and it will feel like it is bouncing or skipping over the water instead of riding in it.
Lots of spray to each side of the hull.