- Dockage & Storage
- Specifications
- Sonar Reviews
- Sonar Parts and Lines
- Used Sonars
- Sonar Links
The Sonar — Something for Everybody
The 23' Sonar one-design keelboat is a high-performance racer and also a comfortable daysailor just right for getting the entire family or friends on the water together. It was designed by Bruce Kirby and almost 700 boats have been built since 1980. The Sonar has recently achieved status as an International Class.
Performance
- Race competitively with three or four crew.
- The Sonar surfs and planes readily downwind.
- Well-balanced, inboard rudder.
- Faster than a J/24 in windy conditions.
- Strict one-design rules.
- Clean and uncluttered cockpit.
- Small jib can be handled by nearly any size crew member.
- Single jib, main, and spinnaker.
- 7'10" beam for easy trailering.
- 11'6" cockpit seats 8 comfortably.
- Full-length molded bench seats with angled backs.
- Self-bailing cockpit.
- Lockable cuddy under the foredeck holds gear, or an outboard motor, even a small Porta Potti.
- 900 lb. keel keeps the boat stable and dry.
View the complete specifications.
- Classifieds
Pre-owned Sonars for sale by Shumway Marine , Rochester, NY. Click HERE .
________________________________________________________________________________________________________________
Used Sonar sails. Priced based on condition. Higher price ok for racing. Lower price ok for practice. From Estate of local sailor.
JIB North $600 and $400 / Doyle $600 and $400
Main North $900 and $500
Spinnaker $500 patches.
Call: Terry Fletcher, Lake Sunapee, NH 603 5179 cell 603 748 6746 or [email protected]
Great choice! Your favorites are temporarily saved for this session. Sign in to save them permanently, access them on any device, and receive relevant alerts.
- Sailboat Guide
1982 23' Sonar 23 Sonar
- Description
Seller's Description
1982 Sonar 23 foot sailboat good bones needs some cosmetic touch up. Fun and easy to use setup. All controls run back to the cockpit. Full set of sails with option of race sails and spares. Complete go anywhere custom built trailer. Preferred boat used by sailing schools, USCG, and maritime academies for sailing instruction. ADA conversion option available. Outboard available. New mast heel professionally spliced. Spare parts and racing sails available. Text first to weed out robots.
Rig and Sails
Auxilary power, accomodations, calculations.
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.
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL
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.
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 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.
Ballast / Displacement * 100
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.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
- D: Displacement of the boat in pounds.
- LWL: Waterline length in feet
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.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )
- D: Displacement of the boat in pounds
- LOA: Length overall in feet
- Beam: Width of boat at the widest point in feet
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.
CSV = Beam ÷ ³√(D / 64)
Commissioned by members of Noroton YC of Darien CT USA and first built by Seidelmann Yachts. A few were also built by Carbon Index in the UK. Current builder (2019) is Rondar Raceboats.
This listing is presented by SailboatListings.com . Visit their website for more information or to contact the seller.
View on SailboatListings.com
Embed this page on your own website by copying and pasting this code.
- About Sailboat Guide
©2024 Sea Time Tech, LLC
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
IMAGES
VIDEO