Sent: Tuesday, September
03, 2002 10:34 AM
like to provide feedback on the Kiwi-Prop which I installed this
year on my C&C
35 Mk3 1987.
I do a considerable amount of sailing each
year (average 1500 miles) which includes both racing and cruising.
My boat was fitted with a Gori folding prop which gave very good
service but was oversized for the boat. The big change I have
noticed with the Kiwi-Prop is the excellent acceleration ahead and
the increased power astern. I now feel much more confident when
approaching a dock, especially in bad weather conditions.
a bonus the design of the Kiwi-Prop allows for less drag when
sailing because the blades have neutral buoyancy and are free to
move independently with the water flow.
I am very happy with
my purchase, especially knowing that there is a money back guarantee
Well done Kiwi. An excellent prop at an
Park Yacht Club
Date: Sun, 17 Mar 2002 18:45:36 +1030
To: "John Blundell"
Hi John; We have just returned
from a trip across our Gulf St Vincent to a place called Stansbury
or in nautical terms Oyster Bay.
Thought you might be interested
in the new sailing ability of Pyewacket.
Remember we are only
30 ft LOA
-25 ft on the water
line. Rigged as
cruising and very
overweight with 9 years of junk on board. Reading the instruments
from the left. we are in 107 feet of water - wind 12 knots true /
sailing 42 deg true on port tack. - heading 069deg - VMG 2.3 wind
45deg - boat knots 6.3. Must tell you the increase is a good .9 knot
Under power we can cruise at 6 kn at 2300 RPM another increase of .9
Cannot remember other figures
they are still on the boat. Think max power speed is about 6.5 kn at
2800 and we cannot reach full engine RPM of 3400. We have a bit of
soot on the transom but no black smoke to note. Thinking about that
perhaps we should have more smoke if max RPM not being reached. Will
work on that one.
You are certainly right about
the noise situation. With your explanation it is easy to hear the
different notes involved. Since you put me right about the noise it
now sounds just like high pressure water being pushed through some
restriction. All noise goes away as the boat starts to move and no
noise in reverse.
The picture tells the
Regards Peter Miller.
Subject: Re: Dan's
350 Bene prop
Date: Mon, 23 Sep 2002 09:20:03
From: Dan La Casse
Sorry about delay in reply
about the prop. Received it on Sept. 5 and managed to get the boat
hauled and it installed on the way to the regatta. Didn't get a
chance to race with it, long story!! However, my comments and my
thanks because; It is about a 40 mile return trip so I can advise
1/ holding my rev's constant at 2500, before I ran at
about 5.9 knots or just under, while after I ran at 6.35 or just
over (based on knot meter not GPS) but in similar water
2/ to achieve same speed I can now hold @5.9
knots at @2200 rev's.
3/ the vibrations are significantly
reduced, the higher the rev's, the more noticeable.
rev's, it now smells like the engine is working- it's what we call
that old diesel smell we noticed when we used to ride our
'greyhound' buses in years gone by
5/I played 'mother ship'
and towed another boat part way down to the Regatta and it seemed to
have nice power
6/Haven't had a chance to confirm at similar
speed about fuel consumption, but at the higher 6.3 I think I'm
using more fuel, perhaps trying to push hull speed as on the way
back our knot meter was showing @ 6.3 while GPS was higher by up to
0.8 in a headwind on a lake- we do get a current but usually with
the wind. I'll be doing further and let you know.
is awesome, had to suck it out of the berth against the wind (@25
knots) and it did fine- both power and very little crabbing. See
next line (s)
8/Took several people out to try it in a bit of
a blow, been to busy with work otherwise, and sailing at between 5
and 7+ knots (knot meter) it no longer looks like the back end of
the Queen Mary prop wash. Used to get vibration and induced rotation
at that speed. Had some serious wash but just close in and then it
settled out, in fairness to you, I think it was hull/rudder/prop
combo. It is much easier to carry through the tacks and you could
see the speed adjust in the puffs- this in heavy air. It was blowing
hard enough that we lay the boat on its side in one of the puffs and
then rounded over to 'hove-to', lets just say it was snotting out
there (we were only ones out).
9/ Coming back in, we are open
to the wind, I was able to come in with some steam and then power
back hard and in control - worked great, as still have a bow and a
PS: Volvo 2003 28 hp on a 2.37:1 reduction with a 17” x
21 deg Kiwiprop
Final comments, we will be attempting to
race it next series (in 10 days) and I'll advise the results. We can
be in 90 'kliks' (most go home) to -1 'klik' (masthead does 360's).
I like results so far and we will keep you advised. Even my 'Aussie'
machinist thinks you 'Kiwis' may have something, he'll try sailing
with us next series- the 'wimp' puts his boat
You've been great to work with. If you need this
redrafted as a bit of a testimonial or if anyone has questions
about, I'll be happy to oblige. Photo to follow.
Dan La Casse
To: Don Walton
Sent: Monday, October 28, 2002 10:52
Subject: RE: Kiwi props
A few thoughts on
the Kiwi Props after a half season as a Power Cat.
mentioned, I don't have a lot to compare the performance to, having
never operated a diesel powered 40' Cat before, but the short answer is the props work! The
boat behaved as if we had fixed blade props down there, with great
bottom end power, excellent reverse (thanks no doubt to the full
pitch) and no noticeable vibrations or noise. Maneuverability is
excellent thanks to the 18' between the props and we can easily spin
the boat in its length as well as prop walk it over to a wharf.
Perhaps the best test of their utility is the fact that Michelle has
total confidence in her ability to handle the boat, and is oblivious
that there might be something novel attached to the
I expect the real benefits will show up next
summer when we get the rig and sails on the boat. The props strike
everyone who sees them as clever, and it is easy to visualize that
they will independently feather to the water flow. I've lost track
of the number of people that have walked by since we hauled her and
flipped the blades back and forth while asking about them. Everyone
agrees that they will likely feather much more effectively at any
speed than any of the other feathering props on the market given the
simple mechanism and lightweight blades.
I was able to get
around 10 knots of boat speed out of them at just under the rated
rpms of the engines, still calibrating the knot meter. Given that it
was relatively flat water, and I had no rig on the boat I actually
think they might be just a bit over pitched, though I spent most of
the season effortlessly powering around in the 6-8 knot range. I may
just leave them as is until I get the rig on and get the dealer over
with his snorkel to adjust them after I'm in the water next spring
As an added benefit, it took me all of 5 minutes to take
both props off for the winter, while a neighbor in the yard spent 20
minutes disassembling his feathering propeller- he actually debated
whether it might be easier to pull the entire shaft as last year he
re-assembled the prop backwards and had to haul the boat to fix it.
As a final note, they are also still the best priced props on the
market as well.
Jamie, Michelle and Noah
Simpson 40 Cat Amurru
From: Patrice Letailleur
Sent: Monday, December 02, 2002 623 PM
Sorry to not had taken time to
write you sooner.
First of all, Kiwi prop is one
of the best improvement I made on my Hunter 31. It
is exactly what I wanted. Before, I had a small 2 blades prop with
very poor power. Now, here are the points.
- Under sail, I gained more than
10% of speed. For example, on backwind, I can go 0.5 knot faster at
about 5 knots.
- Under engine power, the
agility of the boat increased dramatically improving maneuverability
in marina. It is like having a more powerful engine. My engine is
still a small 15 HP Yanmar.
- Under forward power, my max
speed is exactly the same as before but the boat accelerates much
faster. Furthermore, even with strong front wind, I can now keep the
- Under reverse power, the
difference is amazing. Now I can stop my boat immediately in a
- Installation can not be
- The propeller is made of very
few parts less parts, less problems. The blades are independent. So,
even if one blade does not rotate normally for any reason, the 2
others can still work.
- I had just one little problem
that was very easily resolved. On my first try to stop my boat with
reverse power, after throttle back to idle, the engine stops. The
idle speed was too low. I adjusted it at about 750 rpm and since,
the engine has never stalled again.
And now, I recommend the kiwi
Feather prop to everyone that wants to improve sailing performance
and maneuverability under power.
With no hesitations.
Thank you again