Continuously Variable Transmissions

[TeddyDiver]

Anyway the SABB gearboxes Selfa sells in the small end are the right size. The down side is that they have too limited range for pitch control for sailboats so either you have from FWD to AST (without feathering) or FWD to feathering (without astern).
Westmekan has the right product for sailboats but they are lazy to answer any questions so some serious telephone terrorism migh be needed to get some response. Their product is not too cheap either, if I recall right EHWS with 40mm shaft was about 70000NOK
BR Teddy

[BATAAN]

Been using the SABB 28 years and the blade area is small enough on the 2 blade that even flat at neutral pitch there is very little drag if you align it with the strut.
All the effort to get a fully feathering prop is really not worth it.
Several propellers do the CVT thing by changing their pitch to reflect the load automatically and if you insist on full feathering, this is the cheapest way to go and get CVT effect.
The Autoprop seems to be the most successful at what you are looking for, but check out Bruntons complete line.
http://www.bruntons-propellers.com/A...toprophome.htm