Seller's Description
A joy to sail, she is fast, maneuverable, and easy to sail and to singlehand. She is still for sale as of March, 2024.
New lower price, $3500 or make offer.
–There is no trailer with the boat –This is a well-maintained classic wood boat, marine plywood, solid wood framing, sheathed in epoxy and fiberglass. –She was resheathed in 2007; all thru-hulls have been eliminated. –Rigging and sails have been updated. –Launched in 1963 –Recently serviced Yamaha 8hp 2-stroke outboard in a well; it runs great. –New 6 gallon fuel tank. –Five sails, all in good usable condition: Main, #1 genoa, #2 genoa, working jib, and spinaker. The genoas are laminate. –West Marine Danforth-style anchor with chain and rope rode –All lines are led back to the cockpit–Main, jib, and spinnaker halyards; cunningham; outhaul; vang; backstay adjuster; traveler; genoa track adjuster; reefing lines; jib downhaul; –The downhaul for the jib and access through the foredeck hatch lets you raise, lower, and secure the jib without going to the foredeck. –Winter boat cover that was recently re-stitched –Spare lines and parts
She is currently set up for day sailing and racing and with a little work would make an excellent Salish Sea cruising boat. She has been a very competitive racer in the past. An almost new wood 8 ft dinghy is also available for $950, firm.
I’m getting older and I just don’t have the energy anymore.
To avoid spam, I only answer email responses that include your phone number. Thanks.
Specs
- Designer
- Ben Seaborn
- Builders
- ?
- Association
- Thunderbird Class Association
- # Built
- ?
- Hull
- Monohull
- Keel
- Fin
- Rudder
- Spade
- Construction
- Plywood/FG
Dimensions
- Length Overall
- 25′ 11″ / 7.9 m
- Waterline Length
- 20′ 2″ / 6.2 m
- Beam
- ?
- Draft
- ?
- Displacement
- 3,650 lb / 1,656 kg
- Ballast
- 1,530 lb / 694 kg
Rig and Sails
- Type
- Sloop
- Reported Sail Area
- 309′² / 28.7 m²
- Total Sail Area
- 309′² / 28.7 m²
Mainsail
- Sail Area
- 202′² / 18.7 m²
- P
- 31′ 0″ / 9.5 m
- E
- 12′ 11″ / 4 m
- Air Draft
- ?
Foresail
- Sail Area
- 107′² / 9.9 m²
- I
- 26′ 8″ / 8.2 m
- J
- 8′ 0″ / 2.4 m
- Forestay Length
- 27′ 11″ / 8.5 m
Auxilary Power
- Make
- ?
- Model
- ?
- HP
- ?
- Fuel Type
- ?
- Fuel Capacity
- ?
- Engine Hours
- ?
Accomodations
- Water Capacity
- ?
- Holding Tank Capacity
- ?
- Headroom
- ?
- Cabins
- ?
Calculations
- Hull Speed
-
7.2 kn
Classic: 6.03 kn
Hull Speed
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Formula
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL
- Sail Area/Displacement
-
20.9
>20: high performance
Sail Area / Displacement Ratio
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
Formula
SA/D = SA ÷ (D ÷ 64)2/3
- SA: Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
- D: Displacement in pounds.
- Ballast/Displacement
-
41.9
>40: stiffer, more powerful
Ballast / Displacement Ratio
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Formula
Ballast / Displacement * 100
- Displacement/Length
-
196.5
100-200: light
Displacement / Length Ratio
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. 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 pounds.
- LWL: Waterline length in feet
- Comfort Ratio
-
17.3
<20: lightweight racing boat
Comfort Ratio
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Formula
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)
- D: Displacement of the boat in pounds
- LWL: Waterline length in feet
- LOA: Length overall in feet
- Beam: Width of boat at the widest point in feet
- Capsize Screening
-
2.0
<2.0: better suited for ocean passages
Capsize Screening Formula
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
Formula
CSV = Beam ÷ ³√(D / 64)
- Beam: Width of boat at the widest point in feet
- D: Displacement of the boat in pounds
Notes
Some THUNDERBIRDS have been built of molded FG with aluminum spars. A “cruising deck” design was introduced. Most have been built from plans now supplied by the class association. See the class web site for details.
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