SunMaid 20 Specifications
What Is a SunMaid 20?
The SunMaid 20 is a ballasted, trailable, swing centreboard yacht of medium displacement, designed to race competitively in JOG, Quarter Ton and trailable yacht events and also to provide safe, comfortable cruising for the entire family.
Specifications
Designer J B Brooke MRINA (NZ)
Australian Manufacturers C D and E M Hall (1975 to 1981); Bolwell Fibreglass (1981)
Length Overall 6098 mm (20' 0")
Length Waterline 5212 mm (17' 1")
Beam 2287 mm (7' 6")
Draught - Plate up 381 mm (1' 3"); - Plate down 990 mm (3' 3")
Displacement Minimum 820 kg (1807 lb)
Ballast - In skeg 272 kg (600 lb); - In plate 60 kg (132 lb)
Ballast Ratio 40%
Average Towed Mass 1450 kg (3195 lb)
Mast - Length 7620 mm (25' 0"); - Section E 7650 (105 mm X 74 mm)
Boom - Length 3020 mm (9' 11"); - Section E 7658 (59 mm X 80 mm)
Rig 15/16
Headroom (in cabin) 1372 mm (4' 6")
Construction - Hull: Solid hand-laid GRP; - Deck: Foam and timber sandwich GRP
Sail Plan
Features
1. All glass mouldings constructed in excess of Lloyd's requirements.
2. Lead ballast fitted externally up to Sail No 31 and in skeg after sail No 31.
3. Ballast in skeg does not exert sailing strains on centreplate or its casing.
4. Galvanised 12 mm (1/2") steel swing centreplate is easily raised by a simple winch mounted in the cockpit.
5. Yacht has a self-draining cockpit and self-rights to AYF and JOG requirements with sails sheeted in and centreplate raised.
6. Four full-sized bunks - double vee berth and two quarter berths.
7. Well planned galley area including 126 litre (4.5 cu ft) insulated ice-box, methylated spirit stove, sink with water pump, concealed plate and cutlery racks and plenty of cupboard space.
8. 55 litre (12 gallon) inbuilt fibreglass water tank.
9. 27 litre (6 gallon) inbuilt fibreglass fuel tank with deck filler.
10. Self-draining covered anchor well on foredeck will accommodate a 6 kg spade type (Danforth) anchor with chain and rope.
11. Yachts produced before Sail No 200 were fitted with an external sliding main hatch. Later yachts were fitted with a sliding main hatch inside an external envelope.
12. Swing type aerofoil rudder blade secured in place by a friction locking device.
13. Through the mast roller reefing for mainsail was fitted as standard to all yachts. Many yachts are also fitted with slab reefing systems.
14. Mast and boom constructed from anodised aluminium sections.
15. Standing rigging includes forestay, backstay, cap shrouds, lower shrouds and inner forestay, all made from 1 X 19 stainless steel wire.
16. Backstay and inner forestay are adjustable.
17. Long, low centreplate housing barely protrudes above cabin floor.
18. Barlow No 15 sheet winches.
19. Strong anodised aluminium toe rail strengthens and protects the yacht.
20. Mainsheet traveller mounted at the aft end of the cockpit - does not cause obstruction to crew work in the cockpit.
21. Ample stowage area below all bunks, galley unit and cockpit.
22. Outboard motor auxiliary power (5 to 8 HP) mounted on adjustable motor bracket.
23. Yachts constructed after sail No 200 are fitted with a full interior liner.
24. Yachts are fitted with navigation lights - port, starboard and stern light.
25. Yachts constructed after Sail No 259 have a modified interior layout, minor changes to the storage areas for fuel and water and have a cockpit locker.
26. Space is provided in the cabin for a chemical toilet.
27. Comfortable 100 mm bunk cushions.
28. Two - 12v cabin lights are fitted.
Trailer
1. A PASS galvanised steel tandem trailer was designed especially for the Sunmaid 20 and is fitted with equalising suspension and override hydraulic drum brakes.
2. The manufacturer's specification of the towing vehicle must be adequate for towing the combined mass of the SunMaid, its trailer (about 450 kg) and all the extra gear carried on board. The connection between the trailer and the towing vehicle, including the vehicle towbar and any load distributing hitch, must have a specified load-bearing capacity at least equal to that of the towing vehicle.