How to get a 5.5m diameter propeller into a 20ft container
July 2, 2025By Seawork Press FP
Teignbridge Propellers
Innovation Awards
Seawork Awards
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Teignbridge Propellers has enhanced its Clamp on Blade (CoB) propellers with a carbon fibre blade option.
The savings offered by the CoB technology and optional carbon fibre blades generates efficiency, emission and NVH improvements that produce a rapid return on investment for the customer.
This development was part of a 12-month Innovate UK funded Clean Marine Demonstration Call (CMDC) project that saw the development of a carbon fibre CoB propeller for use on a 10m electric powered vessel. The carbon propeller generated a 3 - 4% efficiency gain over the equivalent metallic propeller.
With a hub diameter ratio only 5% greater than a conventional mono-bloc fixed pitch propeller, this represents the lowest hub to diameter ratio replaceable blade propeller currently on the market, maximising the propellers surface area and generating the greatest possible thrust.
Unlike alternative, radially bolted solutions, Teignbridge’s CoB propellers hydrodynamic efficiency is further improved by minimising the number of bolt heads present on the hub surface resulting in improved flow over and around the hub.
In the unfortunate event that propeller blades become damaged, the individual blades can be replaced rather than having to remove and replace the whole propeller – saving the time and cost of having to dry dock or slip the vessel. As CoB parts can be stored onboard, there is no wait for replacement parts to be manufactured or repaired, reducing costly vessel downtime. For smaller vessels and superyachts, the modular design provides an economical and flexible option, with blade changes only requiring the services of a diver.
Teignbridge’s CoB propeller technology is suited to a wide variety of applications including merchant, commercial, military and leisure vessels and can be supplied in a wide range of sizes from 0.75m to 5.50m diameter with keyed or hydraulic shaft fitting. A 5.5m diameter propeller can be packaged and transported in a 20ft shipping container.
The Carbon Fibre Clamp on Blade Propeller won the Innovation Award for Marine Power & Propulsion at Seawork 2025.
