Ross 780 Information, Review, Specs

Sailing Performance & Handling

The Ross 780 is defined by its ultra-light displacement, typically weighing in at approximately 1,129 kg (2,490 lbs). This results in a high Sail Area/Displacement (SA/Disp) ratio of approximately 25.5, which manifests on the water as exceptional light-air acceleration. The fractional sloop rig is powerful; however, the boat's slim 2.46m beam and light weight mean it can be tender. It is often described as "over-rigged" in heavy weather, necessitating early reefing or a competent crew to manage heeling moments.

Handling is precise, aided by a lead-ballasted lifting keel that provides a ballast ratio of roughly 41%. This high ratio offers a stiff feel once the boat is powered up, though it retains the "tippy" characteristics typical of performance-oriented trailer yachts. According to technical documentation from John Crawford Marine, later models like the Ross 780E and Mark III utilized refined keel profiles and lower centers of gravity to improve lateral resistance and windward tracking compared to the earlier Mark I and Mark II versions.

Interior Comfort & Variations

The Ross 780 is one of the few performance-centric trailer sailers of its era to offer a legitimate interior living space. The standard layout features 4 to 6 berths, including a large forward V-berth and two generous quarter-berths. Early models utilized a "pop-top" coachroof to provide standing headroom at the galley and saloon when at anchor.

The model underwent several significant evolutions:

• Mark I & II: These early versions focused on weight savings and racing performance. The Mark II is often identified by a "bubble" style coachroof.
• Mark III: Introduced a more cruise-oriented design with a "sugar scoop" transom for easier swimming and boarding. It also featured a taller cabin house, providing near 6-foot headroom without the need for the pop-top.
• Ross 780E: The "Extended" version featured a hull roughly 450mm longer than the original, with a vacuum-bagged 10mm foam core for increased stiffness. As detailed by John Crawford Marine, this variant radically improved the galley and bathroom areas, offering a separate head with a shower and increasing saloon headroom to approximately 1830mm.

Popular Mentions & Media

The Ross 780 is a perennial favorite in the "Bay to Bay" races in Australia and various national trailer yacht championships in New Zealand. It is frequently cited in regional sailing media as one of the three "greats" of the 7.8m performance class, often compared against the Elliott 780 and the Young Rocket.

Known Issues & Buyer’s Checklist

Prospective owners should pay close attention to the following technical areas:

• Keel Lifting Mechanism: The drop-keel system is a high-wear area. Inspect the lifting cables, pulleys, and the pivot pin for corrosion or fraying. The keel trunk should also be checked for stress cracks.
• Deck Core Integrity: Older fiberglass units often used balsa or foam coring. Buyers should "walk the deck" to check for soft spots or delamination, particularly around the mast step and chainplates.
• Rudder and Gudgeons: The high loads generated during planing can strain the rudder assembly. Inspect the rudder blade for previous repairs or cracks; some owners have reinforced older blades with carbon fiber to prevent failure.
• Transom Flex: Because these boats often carry 6–9.9hp outboards on a bracket, the transom can develop stress cracks over time. Ensure the mounting area is reinforced and free of structural rot or fiberglass crazing.

Community & Resources

The model is supported by the Ross 780 Owners Association (primarily based in New Zealand), which provides a repository for class rules and technical maintenance tips. In Australia, technical support and racing handicaps are often managed through state-level trailer yacht associations and the New Zealand Trailer Yacht Association (NZTYA).

The Verdict

The Ross 780 remains a premier choice for sailors who refuse to sacrifice speed for overnight capability. It is a true "crossover" vessel that rewards skilled handling.

Pros

• Remarkable speed and planing potential in moderate-to-high winds.
• Fully trailerable for easy transport and dry storage.
• Active racing classes and high community support in New Zealand and Australia.
• Surprisingly livable interior, particularly in Mark III and 780E variants.

Cons

• Requires active management and early reefing in heavy air.
• Lifting keel components require more maintenance than fixed-keel counterparts.
• Older units may require significant structural inspection of the deck core and rudder.