Mark,
From the Rocna website, I estimate that the length of the shank (from the
underside where it rests on the roller to the end of the shank) is about 20.3"
for the 10kg, and about 23.5" for the 15kg.
Please note that the overall shank length is greater than that. The measurement
that was important to me was the distance from where it rests on the roller to
the end of the shank.
Robert H.
Sent from my Samsung device
-------- Original message --------
From: "Dr. Mark Bodnar via CnC-List" <[email protected]>
Date: 05-06-2015 10:45 AM (GMT-08:00)
To: [email protected]
Cc: "Dr. Mark Bodnar" <[email protected]>
Subject: Re: Stus-List Did I upgrade or downgrade my ground tackle?
Robert,
Going back and looking again at the Ronca chart I can see I made a
similar blunder. I was thinking 1 ton = 2000 lbs --- but the Ronca
chart is actually metric (New Zealand) - so 1 ton is actually 1000
kg - or 2200 lbs.
As I look at it now I was looking at several different anchors - and
was focusing on 30 ft and ~9000 lbs loaded - rather than 9m and ~4
metric ton.
I bet the 10 would fit easier on my deck - do you know the size
difference in the shanks? Given I got mine for Xmas and it's not
wet yet I'll see if they might allow a trade
Mark
There is no cure for birth and death save to enjoy the interval.
- George Santayana
On 2015-05-06 10:39 AM, RPH via
CnC-List wrote:
Mark,
I have since learned (with Neil's help) that I actually do
have the correctly sized Rocna for my length and displacement.
For a 9m boat, the 10kg Rocna is recommended provided that
displacement is less than 5 tons, or about 10,000 lbs. For some
silly reason, I was calculating as if a ton was 1000 lbs, rather
than 2000 lbs.
Robert H.
-------- Original message --------
From: "Dr. Mark Bodnar via CnC-List" <[email protected]>
Date: 05-06-2015 3:39 AM (GMT-08:00)
To: [email protected]
Cc: "Dr. Mark Bodnar" <[email protected]>
Subject: Re: Stus-List Did I upgrade or downgrade my ground
tackle?
I got stuck on the same issue.
My CS 30 lists at 8000 lbs
Went back and forth as it felt like I was landing right in the
gap. But decided that I'd rather have a little extra. I'm not in
an area where I'll be overnighting in marinas - so I figure the
extra security will help me sleep.
I was able to borrow a Ronca 15 from another lister, walk across
the parking lot and do a rough test in my bow roller. Didn't have
a 10 for comparison.
Haven't gotten the Ronca wet yet - so no idea on performance.
Mark
On May 6, 2015 12:38:41 AM ADT, Robert
Hrabinsky via CnC-List <[email protected]> wrote:
My C&C 30 MKII displaces about 8,700 lbs unladen. I
just replaced my 33lb Bruce with a 22lb Rocna.
The question is: Am I an idiot?
The Rocna sizing chart suggests a 15kg (33lb) anchor for
my displacement, but the website goes on and on about how
conservative their ratings are. It looks like a 10kg (22lb)
Rocna would be recommended for a 30ft boat displacing 7k or
less.
I would have gone for a larger Rocna, but it wouldn't fit
(the shank is too long). My reasoning is that the 22lb Rocna
will almost certainly outperform the 33lb Bruce.
What say you?
Rob H.
Sent from my
Samsung device
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-- Dr. Mark Bodnar --
Bedford Chiropractic
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