[C320-list] Kiwi Prop made up of a composite

Tue Aug 28 00:59:02 PDT 2007

Yes Lew
the blades are composit...Kevlar, I think.
If one gets damaged, it is replaced (US$100, I think). Not the whole prop.
I think the Kiwi Feathering Prop site describes this Composit in detail.

BruceS
Sydney

----- Original Message ----- 
From: <sailorlew at aol.com>
To: <c320-list at catalina320.com>
Sent: Tuesday, August 28, 2007 7:00 AM
Subject: Re: [C320-list] Club Racing the C320

>
> At the Kiwi site, the picture shows blades that seem to be made up of a 
> composite. Is this so, & if so, how do they hold up?
>
> Lew
>
>
> -----Original Message-----
> From: Kirk McCullough <kirk.mccullough at telus.net>
> To: C320-List <c320-list at catalina320.com>
> Sent: Sun, 26 Aug 2007 7:39 pm
> Subject: Re: [C320-list] Club Racing the C320
>
>
>
> Good input Scott.?
> ?
> On feathering props, the Kiwi is unique in the way it feathers. It is 3 
> balded and feathers each blade independantly. Each blade aligns with the 
> flow independ of shaft angle, where the shaft stops rotating (ie no need 
> to lock the shaft to be sure blades are folded properly) independant also 
> of underbody shape, heel etc etc. Other feathering props are made so all 
> blades are feathered at the same angle and don't consider shaft angle 
> etc.?
> ?
> Kirk?
> Boomerang #124?
> ?
> ----- Original Message ----- From: "Scott Thompson" <sthompson at toad.net>?
> To: "C320-List" <c320-list at catalina320.com>?
> Sent: Sunday, August 26, 2007 4:02 PM?
> Subject: Re: [C320-list] Club Racing the C320?
> ?
>> Because the rules are made by serious racers, and no serious racer wants 
>> a > rule change that would generally make it better to have a slower 
>> sailing > boat. Few racers, even on San Francisco Bay, share Adam's 
>> rapture about > the the benefits of using a fixed prop as a brake! The 
>> rules are thus > biased in favor of racing gear over cruising gear, and 
>> no one believes > that they equalize all boats. If that's what you are 
>> after switch to a > strict one design class and get out of PHRF.?
>>?
>> For what it's worth, I believe that folding props are faster than > 
>> feathering ones, and if you really want to race successfully you will do 
>>  > better with a small two-bladed folder that folds into a really compact 
>> and > streamlined package (e.g. the nicer Martec) than with any other 
>> prop. On > the other hand, if you are really that serious about racing 
>> then the 320 > isn't a very good choice of boat in the first place. I 
>> love to cruise my > 320 and I love to race. But I race boats that are 
>> designed for speed, not > cruising comfort.?
>>?
>> Scott?
>>?
>> chris denny wrote:?
>>> If it is generally accepted that a folder is that much of a benefit, why 
>>>  >> is the allowance for a fixed prop not greater? I thought the idea was 
>>> to >> make things "equal". Is 6 seconds the "standard addition" for a 
>>> fixed >> prop??
>>> cd #328?
>>> Peter Clancy wrote:?
>>>?
>>>> Casual racers may underestimate the value of relatively small speed >>> 
>>>> improvements.?
>>>>?
>>>> For example, assume a course is 15 nautical miles long. If you have a 
>>>>  >>> modest 1/2 knot per mile speed advantage (with a folding prop) over 
>>>> an >>> identical boat with a fixed prop and you average 6.5 knots, by 
>>>> the time >>> you reach the finish you'll be at least 10 minutes ahead 
>>>> of the slower >>> boat. If that boat has a 6 second per mile rating 
>>>> advantage due to a >>> fixed prop, he only gains 90 seconds or 1.5 
>>>> minutes when corrected. >>> Generally speaking, the lighter the air, 
>>>> the greater the benefit of a >>> folding prop. We raced 'AROBAN' 
>>>> successfully for several years with a >>> Gori two-blade folder and 
>>>> took first in class in last October's Columbus >>> Day Regatta which is 
>>>> South Florida's largest annual sailboat race.?
>>>> The C320 is a capable racer especially when tweaked and sailed for >>> 
>>>> optimum speed.?
>>>>?
>>>> Peter Clancy?
>>>> 'AROBAN' #222 (former owner)?
>>>> Miami, FL?
>>>>?
>>>>?
>>>>?
>>>>?
>>>>?
>>>>?
>>>>?
>>>> ----- Origi nal Message ----- From: Joe >>> 
>>>> Barrett<mailto:joe at dolphinmortgage.com> To: >>> 
>>>> 'C320-List'<mailto:c320-list at catalina320.com> Sent: Tuesday, August 21, 
>>>>  >>> 2007 9:19 AM?
>>>> Subject: Re: [C320-list] Club Racing the C320?
>>>>?
>>>>?
>>>> If going from a fixed to a feathering/folding prop gains you 1/2-3/4 
>>>>  >>> knot of?
>>>> speed do the math. The 6 seconds you loose makes getting a?
>>>> feathering/folding prop a no brainer.?
>>>> Joe Barrett?
>>>>?
>>>> -----Original Message-----?
>>>> From: >>> 
>>>> c320-list-bounces at catalina320.com<mailto:c320-list-bounces at catalina320.com>?
>>>> [mailto:c320-list-bounces at catalina320.com] On Behalf Of chris denny?
>>>> Sent: Tuesday, August 21, 2007 10:05 AM?
>>>> To: C320-List?
>>>> Subject: Re: [C320-list] Club Racing the C320?
>>>>?
>>>> If a folder is that much help, why does having a fixed prop get you >>> 
>>>> just 6?
>>>> seconds on your adjusted PHRF??
>>>> CD #328?
>>>>?
>>>>?
>>>?
>>>?
>>>?
>>?
>>?
>>?
>> -- > No virus found in this incoming message.?
>> Checked by AVG Free Edition. Version: 7.5.484 / Virus Database: > 
>> 269.12.8/973 - Release Date: 8/25/2007 5:00 PM?
>>?
>> ?
>
>
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