Lagoon 420 Rollercoaster

Lagoon 420 | Extensively Modified Performance-Oriented Cruising Catamaran

Rollercoaster is a highly customized Lagoon 420 that stands apart from any standard example on the market. Designed for owners who value the legendary comfort, layout, and livability of the Lagoon 420 but want significantly improved offshore performance, motion, and safety, this vessel has undergone a professionally engineered hull transformation and comprehensive systems upgrades. Following extensive research and consultation with experienced fabricators and naval design principles, Rollercoaster was lengthened both aft and forward, resulting in a dramatically increased waterline length, reduced pitching, improved speed, and a noticeably smoother motion in a seaway. All structural modifications were executed by Cracker Boy Boatworks (Riviera Beach, FL) and inspected during construction by a marine surveyor (survey documentation available upon request). The result is a rare opportunity: a proven, comfortable cruising catamaran with the waterline length, reserve buoyancy, and wave-piercing characteristics typically found on much larger performance cats. Rollercoaster is not a typical Lagoon 420. It is a thoughtfully re-engineered cruising catamaran that retains the exceptional interior volume, cockpit-galley flow, and liveaboard comfort the model is known for while delivering the speed, motion control, and offshore confidence of a much longer vessel. For sailors seeking a proven, long-range cruising platform with meaningful structural upgrades, serious energy independence, and professional execution throughout, Rollercoaster represents a rare and compelling opportunity.

Hull & Structural Modifications

Extended Transoms Approx. 5 ft (1.5 m)

• Eliminates submerged transoms for reduced drag


• Substantially increases reserve buoyancy aft


• Greatly reduces hobby-horsing in short-period seas


• Improves boarding, swimming access, and deck space


• Finished with Plasdeck Cool Teak (cooler underfoot, no maintenance)

Extended Axe Bows Approx. 3 ft (1 m)

• Narrower, wave-piercing entry inspired by modern axe-bow research


• Improves comfort and safety when motoring or sailing into head seas


• Enhances overall seaworthiness and offshore capability

Net Effect

• Approximately 49 ft effective waterline length


• Improved passage speeds


• More controlled motion in inlets and offshore conditions

Rig & Sail Inventory

• Full-batten, large-roach mainsail (stock)


• Furling headsail (stock)


• Quantum A3 Asymmetric Spinnaker (~1,200 sq ft)

Ground Tackle & Deck Hardware

• 60 lb Ultra Anchor with flip swivel


• Fortress FX-85 secondary anchor


• 200 ft of 3/8″ chain (2020)


• Lofrans Project 1000 windlass


• Custom heavy-duty davits


• Dual swing-arm lifting davits (~300 lb each)


• Integrated into solar arch

Cockpit & Exterior

• Full cockpit enclosure


• Cockpit dodger


• Aft roll-up cockpit shades


• Standard Lagoon cockpit cushions


• Exterior sun screen curtains


• Aft bench seating


• Kayak / SUP carrier

Electrical & Energy Systems

This vessel is designed for true off-grid cruising with a highly efficient 24-volt lithium system.

House Battery Bank

• 4 ReLion 10.2 kWh RB24V100 LiFePO batteries (2019)


• Total capacity: 12.8 kWh @ 24 volts

Solar

• 6 Kyocera 250-watt marine solar panels (1,500 watts total)


• Panels integrated into davits and bimini for shade and efficiency


• 2 Outback 60A MPPT solar charge controllers

Inverter / Charging

• Outback 3500-watt inverter/charger


• Separate 120V / 20A circuit for high-draw galley appliances


• Outback MATE network monitoring system

Starting & Legacy Systems

• 3 Napa 775 starting batteries


• Original 12V system retained for lighting, windlass, winches, electronics


• Victron step-down converters supply 24V 12V efficiently

Generator

• Onan 21.5 kW generator (approx. 4,730 hours)

Plumbing & Utilities

• Spectra Catalina 300 watermaker


• Quick electric water heater


• Panda portable washer


• Electric hot water capability via solar under favorable conditions

Galley & Interior

• Isotherm CR130 refrigerator


• Isotherm CR90F freezer


• Dual-burner induction cooktop


• Sunbeam microwave


• Edgestar icemaker


• Lagoon blue upholstery


• Lagoon standard curtains

Accommodations & Climate Control

• 3-cabin / 3-head owners version layout


• Manual Jabsco heads


• 4-zone air conditioning:


• (3) 8,000 BTU units


• (1) 24,000 BTU unit

Navigation & Electronics

• Raymarine HD color radar (2017)


• Raymarine Axiom 12 chartplotter (2020)


• Raymarine SmartPilot autopilot (hydraulic)


• Raymarine AIS Class B transceiver


• Plastimo compass


• Bahamas Explorer charts


• Maptech charts for U.S. East Coast & Puerto Rico


• (2) Handheld VHF radios


• Helm steering wheel lock tied to autopilot hydraulic valve

Propulsion & Mechanical

• Twin Yanmar diesels with SD-50 saildrives


• Saildrive thrust bearings upgraded to non-wearing needle bearings (2017)


• Gori 2-blade folding propellers


• Excellent sailing efficiency


• Reduced drag


• Line-shedding design


• Standing rigging replaced with Staylock / Norseman fittings (2017)

Safety & Tender

• ACR Global EPIRB


• Walker Bay console tender w/30 HP Tahatsu outboard