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Merlin Rocket
Designer: Various  ·  Builder: Various  ·  First built: 1946
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About the Merlin Rocket

Originally designed as a high-performance dinghy for competitive sailing, this sleek two-person boat has earned a devoted following among racing enthusiasts and sailing clubs across the United Kingdom. The Merlin Rocket represents one of the most technically advanced development class dinghies, where constant innovation and refinement have pushed the boundaries of small boat design for decades. Built for speed and responsiveness, the Merlin Rocket demands skilled crew work and rewards precise boat handling with exhilarating performance. Its narrow beam and fine entry make it particularly well-suited for inland waters and coastal conditions where tactical racing takes precedence over heavy weather capability. The boat's development class status means builders can experiment with construction techniques and sail plans within specific parameters, leading to continuous evolution in performance. Club racing forms the backbone of the Merlin Rocket's purpose, though experienced sailors also appreciate it for recreational sailing that emphasizes technique over comfort. The active class association maintains strict measurement rules while encouraging innovation, creating an environment where both amateur builders and professional boat yards contribute to the design's ongoing development. This combination of tradition and innovation has kept the Merlin Rocket relevant in competitive dinghy sailing for generations.

Core Dimensions
LOA (Length Overall) 14.00 ft / 4.27 m
LWL (Waterline Length) 13.50 ft / 4.11 m
Beam 7.16 ft / 2.18 m
Max Draft 4.50 ft / 1.37 m
Displacement 210.00 lb / 95 kg
Design & Construction
Hull Type Centerboard Dinghy
Rigging Type Fractional Sloop
Construction Wood/FG
Designer Various
Builder Various
First Built 1946
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Performance Ratios
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
38.1
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 2.07 pounds/inch
Rig Dimensions
I (Foretriangle Height) 0.60 ft / 0.18 m
P (Mainsail Luff) 105.00 ft² / 9.75 m²
E (Mainsail Foot) 38.10
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