Seller's Description
1978 Sun Yacht 27 1/2 foot long. Very nice spacious interior. TONS of upgrades and new items, ready to sail right now! No soft spots!
Equipment: 1978 Sun Yacht 27 1/2 foot long. Very nice spacious interior. TONS of upgrades and new items, ready to sail right now! -2016 Quantum Sails professionally serviced at Quantum 2023 with roller furler Jib -Queen V Berth with foam memory topper, Twin Aft bed, Settee turns into Queen Bed (all new 4 inch foam and marine vinyl cushions 2022) -Ray Marine A65 Chart Plotter -Brand New Stack Pack and lazy jack lines 2023 -VHF Radio -New induction cooktop (original princess alcohol stove included) - All new cabin LED lights with remote -New custom curtains - Pressurized fresh water system head and galley -New Pettit SR-21 Bottom paint 2023 -Custom winter canvas cover -New Antal V-Cam 814 double clutch -New Main Sheet line -Swim platform with new boarding ladder -New outdoor cushions 2022 -Updated wiring and new auxiliary switch panel ready for auto tiller hookup (auto tiller included) -2 new Marine batteries 2022 -New Guest Battery charger 2023 -Yammar SB8 diesel -Ray Marine depth and speed 2015 -New Compass 2017 -Dock Box -Summer slip paid for through November at Safe Harbor Sandusky $2,000 value!
Specs
- Designers
- ?
- Builders
- ?
- Associations
- ?
- # Built
- ?
- Hull
- Monohull
- Keel
- ?
- Rudder
- ?
- Construction
- ?
Dimensions
- Length Overall
- 27′ 5″ / 8.4 m
- Waterline Length
- ?
- Beam
- 8′ 11″ / 2.7 m
- Draft
- 4′ 5″ / 1.4 m
- Displacement
- ?
- Ballast
- ?
Rig and Sails
- Type
- ?
- Reported Sail Area
- ?
- Total Sail Area
- ?
Mainsail
- Sail Area
- ?
- P
- ?
- E
- ?
- Air Draft
- ?
Foresail
- Sail Area
- ?
- I
- ?
- J
- ?
- Forestay Length
- ?
Auxilary Power
- Make
- ?
- Model
- ?
- HP
- ?
- Fuel Type
- ?
- Fuel Capacity
- ?
- Engine Hours
- ?
Accomodations
- Water Capacity
- ?
- Holding Tank Capacity
- ?
- Headroom
- ?
- Cabins
- 1
Calculations
- Hull Speed
- ?
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
- ?
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
- ?
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
- ?
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
- ?
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
- ?
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
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