Originally designed by the legendary Ericus Gerhardus van de Stadt in the early 1960s, the Trotter Pandora (frequently referred to as the Pandora International or Pandora 22) represents a pivotal moment in the evolution of the GRP "pocket cruiser." The design's lineage traces back to the Randmeer day sailor, a popular Dutch racing dinghy known for its speed and agility. Van de Stadt evolved this concept by increasing the freeboard and adding a cabin, creating the "Trotter." When the design was licensed to UK builders—initially Grimsby Plastics and later Rydgeway Marine—it was marketed as the Pandora, eventually becoming one of the most successful small yachts of its era with nearly 900 hulls produced.
Trotter Pandora Information, Review, Specs

- Make
- Trotter
- Model
- Pandora
- Builder
- E. G. van de Stadt
- Designer
- E. G. van de Stadt
- Number Built
- Production Year(s)
- 1967 - ??
Sailing Performance & Handling
The Pandora's sailing characteristics are defined by its racing pedigree. Unlike many "floating caravans" of the 1970s, the Pandora features a slim hull with a length-to-beam ratio of approximately 3.15, favoring speed and efficiency over interior volume. With a substantial ballast ratio of roughly 38% to 40%, the vessel is noted for its stiffness and ability to handle weather that often drives larger boats back to port. In period literature and sea trials, the boat is frequently described as a responsive and well-balanced craft that remains light on the helm even when well-heeled.
Technical data suggests a boat that excels in light-to-moderate air, with a Sail Area/Displacement (SA/Disp) ratio in the high 18s. The "International" variant, introduced around 1973, featured a deeper, higher-aspect-ratio fin keel and a taller masthead rig, further sharpening its competitive edge. Owners often report that the boat tracks exceptionally well for its size, thanks in part to the clean water flow provided by its transom-hung or skeg-hung rudder, depending on the model year.
Interior Comfort & Variations
The Pandora's interior is a study in functional minimalism, designed for those who value sailing over standing headroom. The layout is typically an open-plan configuration providing four berths: two V-berths in the forepeak and two settee berths in the main cabin. Because of its racing-derived hull, headroom is limited to approximately 4 feet 8 inches, making it a "sitting-only" cabin for most adults.
Significant variations exist across the production run:
- Trotter/Pandora Mk 1: The original version featured a lower coachroof and a more spartan interior.
- Pandora International: Updated in the early 1970s with a higher coachroof to improve internal volume and the addition of a molded-in outboard well.
- Pandora 700: The final evolution, featuring a retrousse stern that increased the overall length to 7.01 meters and moved the rudder to an inboard, skeg-hung configuration.
- Keel Variations: The hull was offered as a fin keel for racing, bilge (twin) keels for drying moorings, and a centerboard/lifting keel version for shallow-water cruising.
Popular Mentions & Media
The Pandora has achieved a "cult status" in the UK and Northern Europe, specifically within the racing community at the South Caernarfonshire Yacht Club in Abersoch, Wales, where a dedicated class fleet continues to compete. Its seaworthiness has been documented in various amateur cruising logs, including North Sea crossings and restoration chronicles on YouTube, where modern sailors highlight the model's longevity and classic Van de Stadt lines.
Known Issues & Buyer’s Checklist
- Mast Step Compression: A common technical failure involves the deck support structure. The deck is supported by internal bulkheads or beams that can compress over time, leading to "dishing" of the deck or sagging in the cabin ceiling.
- Rigging Attachment Points: Inspect the D-rings and deck-to-hull joints where rigging attaches. Signs of convexity or stress cracking in the gelcoat may indicate that the underlying glass reinforcement has begun to flex or delaminate.
- Forehatch Seals: The original hatch design is prone to leaking. Many owners have replaced these with modern Lewmar hatches or fiberglassed the original frames to improve water tightness.
- Keel Slot Fouling: On lifting-keel models, the centerboard slot is a known trap for mud and stones in drying harbors. If the plate does not drop or retract smoothly, it may require a haul-out to clear the mechanism.
- Rudder Bushings: On earlier transom-hung models, check the pintles and gudgeons for excessive play, which can lead to a vibrating helm at speed.
Community & Resources
The primary hub for technical support is the Pandora Owners Association, which historically maintains archives of original brochures, sail plans, and modification guides. While the association's online presence has been intermittent in recent years, their technical documentation remains the primary resource for restoration efforts.
The Verdict
The Trotter Pandora is an ideal entry-level yacht for those who prioritize sea-kindliness and classic aesthetics over modern creature comforts.
Pros:
- Exceptional ballast ratio for high stability and safety in offshore conditions.
- Classic Van de Stadt design with beautiful, scaled-down proportions.
- Versatile keel options (fin, bilge, or lifting) suited for various cruising grounds.
- Strong legacy with a dedicated class racing community.
Cons:
- Restricted headroom (4' 8") makes the interior cramped for extended cruising.
- Aged GRP may require structural reinforcement at the mast step.
- Sparse interior amenities compared to modern 22-footers.
Measurements
Construction & Hull
- Construction Material
- Fiberglass
- Hull Type
- Monohull Sailboat
- Keel Type
- Fin
- Rudder
- 1x Transom-Hung
- Ballast
- 950 lbs
- Displacement
- 2500 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 21.82 ft
- Waterline Length (LWL)
- 17.72 ft
- Beam
- 6.89 ft
- Draft
- 3.28 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Masthead Sloop
- P (Main Luff)
- -
- E (Main Foot)
- -
- I (Foretriangle Height)
- -
- J (Foretriangle Base)
- -
- Forestay Length (est)
- -
- Sail Area
- 178 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 15.46
- Ballast / Displacement Ratio
- 38
- Displacement / Length Ratio (D/L) Ratio
- 200.59
- Comfort Ratio
- 15.58
- Capsize Screening Formula
- 2.03
- Hull Speed
- 5.64 kn