Lumenier RB2205C-12 2400KV SKITZO Ceramic Bearing Motor
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Old Sep 16, 2010, 04:36 PM
DiasDePlaya is offline
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Boom vang


Hello,

I see that all RC boats used rigid boom vang. Why? Why not use a boom vang as laser or similar?
Last edited by DiasDePlaya; Sep 16, 2010 at 05:35 PM.
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Old Sep 16, 2010, 04:44 PM
Dick L. is offline
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I usually use a "string" vang with bowsie for adjustment. While it is much faster to adjust dockside, there is a difficulty in repeating the adjustments each time.

But ..... it is faster, and no locking nuts to worry about with cold, wet fingers.
Old Sep 16, 2010, 10:27 PM
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one opinion would be that in really super light air conditions the rigid boom
vang will hold the boom UP when the boom is near the centerline , so that
the weight of the boom itself and the sail will not allow the shape of the
leech of the main to be affected . ie: the leech will not be over trimmed
because the boom cannot pull down the main closing off the aft edge of the main.
it keeps the leech open .
Last edited by thorsail; Sep 16, 2010 at 10:29 PM. Reason: ?
Old Sep 17, 2010, 12:09 AM
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The EC 12 guys have a good vang idea, a spring loaded vang, so it will hold up the boom in light air and you can still sheet vang when you want to
http://www.ec12.info/Vang%20Build.htm
Dick I have not used a lock nut on my vangs in years, I use turnbuckle type vangs, with a slight amount of interference fit on the threads, just bring it in, turn the the wheel and your done.
John R.
Old Sep 17, 2010, 03:06 AM
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Originally Posted by tbarjohn View Post
The EC 12 guys have a good vang idea, a spring loaded vang, so it will hold up the boom in light air and you can still sheet vang when you want to
http://www.ec12.info/Vang%20Build.htm
Dick I have not used a lock nut on my vangs in years, I use turnbuckle type vangs, with a slight amount of interference fit on the threads, just bring it in, turn the the wheel and your done.
John R.
That's very clever John!
Old Sep 17, 2010, 10:07 AM
Blue Heron is offline
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Rick Lange
For the Soling 1 M, only a rigid vang assures the correct twist in main sail.
Old Sep 17, 2010, 10:14 AM
DiasDePlaya is offline
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Originally Posted by Blue Heron View Post
For the Soling 1 M, only a rigid vang assures the correct twist in main sail.
If a rope vang can assures the correct twist in a Laser (7 sq. mt. of sail) I don't see why not in a 1M Soling!
Old Sep 17, 2010, 10:27 AM
DiasDePlaya is offline
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Quote:
Originally Posted by thorsail View Post
one opinion would be that in really super light air conditions the rigid boom
vang will hold the boom UP when the boom is near the centerline , so that
the weight of the boom itself and the sail will not allow the shape of the
leech of the main to be affected . ie: the leech will not be over trimmed
because the boom cannot pull down the main closing off the aft edge of the main.
it keeps the leech open .
This is why I don't like rigid vangs. In super light conditions the wind is very variable, sometimes died completely and just few second after you find some wind, I prefer to use the natural shape of the main. When wind died completely I release completely the sheet tension, that is the same that I do when onboard a 40' sailboat. When the wind start again I prefer to work with the sheet to control the twist in super light conditions, this way I can adapt the twist for every blow.
Old Sep 17, 2010, 01:00 PM
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Also (big boat) when you have an 11 foot wide traveller, you can travel out, sheet in and remove twist and tighten leech - or vice versa. Travel in, sheet out and add twist.

Unfortunately so many r/c classes are restricted to only 2 channel radios by class rules.
Old Sep 17, 2010, 08:23 PM
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Quote:
Originally Posted by DiasDePlaya View Post
If a rope vang can assures the correct twist in a Laser (7 sq. mt. of sail) I don't see why not in a 1M Soling!
The soling have flat, single panel sails. The kit vang is a rope-vang, every skipper that wants to compete has changed it.

Ultimately is just a matter of preference/taste/looks, every system has his advantages/disadvantages, you just have to figure out where your balance lies.
Old Sep 18, 2010, 04:50 PM
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I prefer the consistant mainsail leech profile that a rigid boom vang affords....
Old Sep 18, 2010, 07:05 PM
DiasDePlaya is offline
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In my Victoria I made a 8:1 rope vang, and it is very precise, and sure is lighter than a metallic vang.


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