Best known for their modern Autoprop feathering and Varifold folding propellers, Bruntons have been designing and manufacturing propellers and sterngear for all types and sizes of vessels for over 100 years.
Autoprop - Automatic Variable Pitch Propellers
Whatever your type of cruising yacht, mono or multihull, heavy or light displacement, you will find fitting an Autoprop greatly enhances the performance of your vessel under power and sail. Better performance means faster passage times and more satisfying sailing for both skipper and crew.
Autoprop automatically adopts the most efficient pitch setting taking into account the driving force of the sails. The result is increased speed at lower engine revs, giving longer range and more comfortable cruising. Fuel saving Autoprop is the only propeller which automatically varies its pitch depending on operating conditions, thus maintaining maximum efficiency at all times. Higher speeds and greater range are the result.
With the blades in the feathered position, drag compared with a fixed three blade prop is reduced by up to 85%. The two blade version provides even bigger reductions. These huge savings can equate to a knot or more in added boat speed when sailing.
Varifold Folding Propeller
The complete range of Varifolds has a model for cruiser racing and racing yachts of every size. Varifold brings reductions in noise and vibration and excellent performance under engine, both ahead and astern, the result of the propeller's unique design. Varifolds have proper helical pitch distribution, including pitch reduction towards the blade tip. This pitch reduction 'unloads' the blade tips and, combined with the skewed blades, greatly reduces noisy pressure pulses against a yachts hull.
A 4 blade version has successfully been fitted to a boat with a 750hp engine. Each Varifold, whatever its size, is built to the same extremely high specification from a nickel-aluminium-bronze alloy which guarantees great strength and high corrosion protection. Cruiser racing and racing yachts can now get the best of both worlds. a folding propeller that combines low drag when sailing, with efficient and quiet power when motoring.