Area of BCC Rudder

BCC Forum
1
Does anyone know the area of the rudder on the BCC?
S/V
IDUNA
2

Usually found near the back of the boat, mostly under the water.

(I’m sorry. It’s Friday. I could not resist.)

Thom Dyson
Director of Information Services
Sybex, Inc.

On 11/30/01 7:49:43 AM, “Rod Bruckdorfer” <seagypsy@att.net > wrote:

Does anyone know the area of the rudder on the BCC?

S/V
IDUNA

3
Thom:
I had a good laugh and I needed a good laugh today - thanks.
Rod
S/V IDUNA
----- Original Message -----
Sent: Friday, November 30, 2001 10:54 AM
Subject: Re: [bcc] Area of BCC Rudder


Usually found near the back of the boat, mostly under the water.

(I'm sorry.  It's Friday.  I could not resist.)

Thom Dyson
Director of Information Services
Sybex, Inc.

On 11/30/01 7:49:43 AM, "Rod Bruckdorfer" <seagypsy@att.net > wrote:
> Does anyone know the area of the  rudder on the BCC?
>
> S/V
> IDUNA
>
>




4

Director of Information Services…good one!

Question on vane operation:

Picture sailing along with the vane and you have to tack. If there
were a way (maybe there is) to reset the vane for the other tack
by a quick adjustment would the boat steer herself through the tack
leaving a singlehanded crew free to tend the sheets? Would she stall
midway and end up in irons?

Thanks,

Tod

5

Hi Tod,
Sorry I didn’t get back to you sooner regarding tacking the boat with the
windvane. I discussed it with Roy Myers who had the same results as I did.

I have done it successfully, however it is not a simple matter and I would
rather just loosen the clutch, tack, then when on course, tighten the
clutch.

If you want to tack using the windvane you will have to have someone else
hold the boat on course using the tiller while you change the windvane.
Loosen the clutch, move the vane to where you expect it to be when the tack
is completed. The moment you tighten the clutch the boat will begin
turning. There must be some speed for this to happen but not much. The
boat never stalled but the tiller pinned me against the boomgallows!

Roger Olson

----- Original Message -----
From: <htmills@bright.net >
To: BCC list <bcc@yahoogroups.com >
Sent: Friday, November 30, 2001 5:00 PM
Subject: Re: [bcc] Area of BCC Rudder

Director of Information Services…good one!

Question on vane operation:

Picture sailing along with the vane and you have to tack. If there
were a way (maybe there is) to reset the vane for the other tack
by a quick adjustment would the boat steer herself through the tack
leaving a singlehanded crew free to tend the sheets? Would she stall
midway and end up in irons?

Thanks,

Tod

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6

— In bcc@y…, “Rod Bruckdorfer” <seagypsy@a…> wrote:

Does anyone know the area of the rudder on the BCC?

S/V
IDUNA

i have calculated (more like estimated) it out. it is at home and my
computer is crapped out at the moment. i will get it and post when
able.
what i found when calculating the area for my tab is that a narrow
high aspect blade needs little balance. i think mine is about 3"
wide. when you do the calculations you measure back from the leading
edge to find the center of lift. if i recall it is about 20% of the
chord aft. my tab shaft is 3/4" so the axis of rotation is already
about 10% aft. it does not take much forward area to balance out the
remainder. if one is willing to give up a bit of light air
performance, it might even be able to be completely omitted.
btw- thanks to all for the info on the tillerpilot attachment to
the vane. i cannot wait to try it out. i fooled around with moving
the pin both forward and aft of the rudder axis, but never thought
much about trying to make it dead on center.
john churchill