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2 blade folding prop had its day


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#21 rossd

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Posted 13 November 2019 - 12:04 PM

I found Briski great , bit old school but know theif stuff, they will know whats happening,
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#22 alibaba

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Posted 13 November 2019 - 05:33 PM

Tumbleweed- very nice


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#23 chariot

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Posted 13 November 2019 - 06:32 PM

That's a nice boat. Enjoy.


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#24 Aleana

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Posted 15 November 2019 - 12:50 PM

Thanks for the replies. I've tried to contact Briski, but no reply.
Had some more practice today and some improvement in my skill,
but what certainly doesn't help is the fact that when you hit
reverse, nothing happens, unless you hit at least 2500 revs.
I guess that's the problem with folders against feathering, the trailing
edge becomes the leading edge, which is not very efficient.
Might be back to kiwiprop, which is what I had on the last 9.2


My previous boat had a Yanmar 3GM with saildrive abd 2-blade folding prop which was pretty good ahead but needing lots of revs astern before it got working. But propwalk itself was minimal and disappeared immediately the boat had any speed in reverse. I learned to give the helm a little tweak to stbd as I hit reverse to offset the propwalk and the result was that I could reverse the boat as accurately as parking my car. Literally. I don’t know the name of the prop but I’ll try to find a photo to post in case the helps?
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#25 Aleana

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Posted 15 November 2019 - 12:58 PM

I’ve found some pics but can’t post them from my mobile (for next few days). If someone else wants to post them then msg me your email?
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#26 Aleana

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Posted 19 November 2019 - 01:04 PM

AC folding prop 1
 
AC folding prop 1

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#27 alibaba

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Posted 19 November 2019 - 03:59 PM

Thanks for the pix.That looks like the same prop as mine. I agree it needs heaps in reverse before it does anything, but great performance in ahead. However, after another couple of days playing with it, still huge propwalk in reverse, and even when you get the boat moving at 2/3 knots it still won't go to port.
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#28 Aleana

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Posted 19 November 2019 - 04:49 PM

My current boat has far worse prop walk and so the technique I’ve adopted is to get the boat moving astern and then reduce power back to slow astern - this gives the rudder a chance to bite and overcome propwalk after which I can add more reverse power if needed but now the rudder is in control.

Maybe try that?
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#29 w44vi

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Posted 19 November 2019 - 05:53 PM

Aleana are you using copper based anti foul next to your sail drive ?


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#30 Aleana

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Posted 19 November 2019 - 08:14 PM

Hope not (and I don’t own pictured boat anymore). Last antifoul (pictured) was done by TOG and they were supposed to use different paint next to saildrive.
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