It takes into consideration "reported" sail area, displacement and length at waterline. The higher the number the faster speed prediction for the boat. A cat with a number 0.6 is likely to sail 6kts in 10kts wind, a cat with a number of 0.7 is likely to sail at 7kts in 10kts wind. KSP = (Lwl*SA÷D)^0.5*0.5

  2. Spindrift 13

    Spindrift 13 is a 13′ 3″ / 4.1 m monohull sailboat designed by Hubert Vandestadt and built by Vandestadt and McGruer Ltd. starting in 1965. ... The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more. Formula. D/L = (D ÷ 2240) ÷ (0.01 x LWL)³ D: Displacement of the boat in ...

  3. Spindrift Day Sailor I Swing Keel

    Mar 13, 2014. #1. I recently purchased a 1981 Spindrift Day Sailor I made by Rebel Industries, and similar to the O'day version. It is 16.' and a few inches. The guy I purchased this from, bought it at auction and didn't know the boat's history. Here is the issue. The boat came with a broken wooden swing keel that is relatively light, and a ...

  4. Review of Spindrift 13

    The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Spindrift 13 is about 42 kg/cm, alternatively 240 lbs/inch. Meaning: if you load 42 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 240 lbs cargo on the boat it will sink 1 inch.

  5. Spindrift 13

    The Spindrift 13 is a recreational sailboat, with the manufactured boats built predominantly of fibreglass, with the deck made as a foam sandwich. It has a fractional sloop rig, a raked stem, a plumb transom, a transom-hung rudder controlled by a tiller and a retractable centreboard. Both the rudder and centreboard are "kick up" designs.

  6. Precision: Small, Fast, and Fun

    Spindrift/Starwind. Rebel Industries bought the molds for the Starwind 19 and Spectrum 22, and built a handful of boats, not always wisely or well. They marketed the Starwind 19 variously as the Starwind 19, Starwind 190, and Spindrift 19, but left the boat essentially unchanged from the orginal Wellcraft version.

  7. Boat Review: Spindrift 22

    Boat Review: Spindrift 22. An early Jim Taylor design from which an entire series of trailerables evolved. Invited aboard a friend's "new" trailerable, we struggled to find a place to sit in the surprisingly small cockpit where we wouldn't either interfere with the helmsman, or upset the boat's balance. Sitting forward blocked the ...

  8. Spindrift 12

    Here we see a 12' model built by Meredithe Stuart-Smith of Castine, Maine. Here we have one member of a family of boats—four in all—doing business under the name of Spindrift and designed by Graham Byrnes of Vandemere, North Carolina. The very first Spindrift was a 10-footer, and was meant purely as a tender to a larger yacht.

  9. SPINDRIFT 13.3 detailed photos/plans/specs MAST

    Hello - in coming up with a mast for this boat given to me, i thought i'd ask here if anyone has photos/plans/specs on the SPINDRIFT 13.3 sailboat - especially the mast details (step, stay/shroud attachment, main halyard hardware at top of mast etc) I can probably wing it with what i have - but t...

  10. Boat: 1985 Spindrift Spindrift 13

    The 1985 Spindrift Spindrift 13 sailboat has a fiberglass hull and has an overall length of 13 feet (sometimes referred to as LOA). The width (or beam) of this craft is 56 inches. This boat is rigged as a Sloop. The sail area for the sailboat is 90 square feet. The displacement for the boat is approximately 300 lbs.

  11. Building a Spindrift Nesting Dinghy

    The Spindrift is a beautiful boat. There is something appealing about the idea of a sailing rig on a dinghy. Nesting dinghys are time consuming to stow and deploy. They are a necessary evil on pocket cruisers unless you are willing to have an inflatable boat and deflate it when not in use.

  12. 17' Spindrift Day Sailor 1 question

    8. Spindrift 17' Day Sailor 1 Iron Mountain. Oct 19, 2013. #8. agprice22 said: I would suggest Royce's Sailing Illustrated for learning boat rigging. There are many ways to rig a boat, and there are many reasons to rig different ways. Cruisers rig differently than daysailors, and racers rig differently still.

  13. Ron Amy Spindrift 43

    The Spindrift 43' has two sister ships. All three are designed by Ron Amy. Also, all three (Spindrift 43, Formosa44, and Hampton 43) have a canoe ended transom. The Spindrift 43' was exclusively contracted to the Formosa Boat Builders in 1982 by the Spindrift Dealer in Newport Beach. These were build under the strict Quality Control of the ...

  14. Review of Spindrift 24

    Specifications and Review of Spindrift 24 based on the boat's specifications and artificial intelligense. ... The Motion Comfort Ratio for Spindrift 24 is 13.5. Low High 31% 0 50 100. Comparing this ratio with similar sailboats show that it is more comfortable than 31% of all similar sailboat designs. This comfort value is just below average.

  15. Review of Spindrift 22

    The DL-ratio for Spindrift 22 is 127 which categorizes this boat among 'ultra light racers'. Heavy Light 82% 0 50 100. 82% of all similar sailboat designs are categorized as heavier. A light displacement requires less sailarea and has higher accellerations.

  16. SPINDRIFT 15: Reviews, Specifications, Built, Engine

    If you are a boat enthusiast looking to get more information on specs, built, make, etc. of different boats, then here is a complete review of SPINDRIFT 15. Built by undefined and designed by PDF, the boat was first built in 1979. It has a hull type of Centerboard Dinghy and LOA is 4.42. Its sail area/displacement ratio 41.00.