How does a swing keel work?
How does a swing keel work?
A swing keel is the same as a lifting keel and is also known as a centerboard. These keels swing back along the centerline of the boat, reducing the draft and wetted surface below the waterline. Swing keels allow you to increase and minimize draft on command.
How much does a Catalina 25 swing keel weigh?
Dimensions
| Length | 25 ft |
|---|---|
| Max Draft | 2.83 ft |
| Ballast Weight | 1,750 lbs |
| Displacement | 4,400 |
| Boat Keel | Wing Keel |
Is a Catalina 25 Trailerable?
The Catalina 25 is an American trailerable sailboat, that was designed by Frank Butler and first built in 1978.
What is a swing keel sailboat?
Swing keels are a robust and useful alternative to centerboards, and they’re common on variable draft sailboats. Swing keels are retractable keels that are hinged in the front and swing into a slot called a trunk. Sailors lift and lower the keel with a crank, pulley, or hydraulic system.
How fast can a Catalina 25 sail?
about 5- 1/2 knots
Under power, the Catalina 25 will make about 5- 1/2 knots with a 6-hp. outboard, and you can coax an extra 1/2 to 3/4 knot or so out of the boat with an 8- hp. or 9.9-hp. engine. (Theoretical maximum hull speed in ideal conditions is around 6.3 knots.)
Are winged keels any good?
Wing keels come in all shapes and sizes but the general idea is to have, aside from the vertical fin of the traditional keel, a horizontal foil on the bottom….What are the pros and cons of the wing keel?
| Advantages | Disadvantages |
|---|---|
| Stiffer ride | Difficulty getting unstuck when aground |
| Innovation |
How do you lower the keel on a Catalina 22?
A primary safety feature of the Catalina 22 is a keel winch designed with an integral clutch. There is no ratchet lever to release. Simply turn the handle clockwise to raise the keel. Turn the handle counterclockwise to lower the keel.
How does a centerboard work?
A centerboard is a retractable appendage that pivots in and out of a slot (centerboard trunk) in the hull/keel of a sailboat. Similarly, lifting the centerboard reduces the wetted surface area, resulting in lower drag while sailing downwind.
What is the purpose of a centerboard on a sailboat?
Function. A centreboard (often called a lifting foil in a modern racing dinghy) is used to provide lift to counter the lateral force from the sails. This is required for sailboats to move in directions other than downwind, since the force of the sail is never closer than 45 degrees to the apparent wind.
What’s the difference between the swing keel and Catalina 25?
The Swing keel version adopts an appendage configuration without compromise between draft and performance. The only drawbacks are the space taken inside and the price of the system… The Catalina 25 is as well listed, on Boat-Specs.com, in Fin keel, Wing keel and Tall rig version ( see all the versions compared ).
How fast is the Catalina 25?
The Catalina 25, with a PHRF rating of around 228 for the standard rig or 222 for the tall rig, is not especially fast for its size. In fact, the swing-keel version, which is noticeably slower upwind than the fin-keel version, probably deserves an even higher time allowance than its been given.
What is the ratio sail area to displacement on a Catalina 25?
The Catalina 25 is as well listed, on Boat-Specs.com, in Fin keel, Wing keel and Tall rig version ( see all the versions compared ). The ratio sail area to displacement is obtained by dividing the sail area by the boat’s displaced volume to the power two-thirds.
When was the Catalina she yacht built?
She was built between 1978 and 1994 by Catalina Yachts (United States) with 5866 hulls completed. The Swing keel version adopts an appendage configuration without compromise between draft and performance. The only drawbacks are the space taken inside and the price of the system…
