We simply can’t compare to the vast technical knowledge that John Blundell has in New Zealand and recommend you take test drive through his website at www.kiwiprops.co.nz
OK so we frequently ask customers at boat shows to expain to us how it works and most can figure out forward but the simplicity of the reverse engagement usually escapes them. Most feathering propellers use some combination of complex gearing, centrifugal force and rotation to engage reverse and feather. The Kiwiprop uses the near neutral buoyancy of its Zytel blades to feather. In ahead it uses the force of the water against its rotation to seat the blades onto individual adjustable pitch stops. In reverse we again use the force of the water to engage a 1/3 turn of the blade carrier against the hub which rotates reverse rollers into a position where they literally hold the blade in a maximum reverse thrust position. Very few moving parts, 4 maybe 8 depending on what you call moving, no complex machined parts to wear, just reliable feathering, forward and reverse when you need it.
Why Does it Feather More Efficiently than the Competition?
All of our competitors align their blades to a common ‘feathered’ angle based on the flow of the water over the non-rotating propeller. Unfortunately, the real world is a complex confluence of hull shapes, shaft angles, engine offsets, confused sea states, almost the exact opposite of consistent laminar flow across all of the blades simultaneously.
The KiwiProp allows each blade to feather independently, and while it is not uncommon for angled shafts and hull shapes to initiate autorotation in any propeller, the blades are free to find their individual angle of least resistance whether you let the prop free wheel or want to lock your shaft. You could do a University thesis on the hydrodynamics under your boat- I’m sure someone has. Every boat is different and the KiwiProp simply is the simplest lowest drag design of any feathering prop on the market. Expect a 1/2 knot to a knot improvement in sailing performance, especially in light airs and through tacks.
Do you ship oversees and to P.O. boxes?
Yes, we’ll ship your package anywhere that can accept deliveries.
Do you have customer service?
We try to make ourselves available but we simply don’t spend a lot of time in the office. You can leave a message at 416-237-0777 or an email to firstname.lastname@example.org is better. Even though we like to go off sailing, these days we’re never off the grid for more than a day or two.