VMG Blades

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Chris Ting
Chris Ting
NSW
302 posts
NSW, 302 posts
5 Aug 2009 7:01am
Rubby said...

What does VMG stand for?


en.wikipedia.org/wiki/Vmg
Chris Ting
Chris Ting
NSW
302 posts
NSW, 302 posts
5 Aug 2009 7:09am
Quick update, 4 races in Sopot today at the formula Europeans.

Really tough day, light winds 12 knots max in the gusts, plus really sloppy ocean swell. I'm suffering from what I hope is not as pig related virus, torn calf muscle, and a board which is now full of water.
Sean had a mixed day, nothing spectacular.

We will get the report up on Storm Riders soon, but internet access is a bit limited.

Chris

choco
choco
SA
4186 posts
SA, 4186 posts
5 Aug 2009 8:54am
What is the ideal weight of a sailor who competes in Formula ? would someone of my weight 104kg have any hope against the lighter guys in marginal conditions?
elmo
elmo
WA
8894 posts
WA, 8894 posts
5 Aug 2009 7:24am
That's not good, hope you get better soon
JayBee
JayBee
NSW
714 posts
NSW, 714 posts
5 Aug 2009 10:14am
choco said...

What is the ideal weight of a sailor who competes in Formula ? would someone of my weight 104kg have any hope against the lighter guys in marginal conditions?



Choco - I race Formula (if you can call what I do racing) and am about your size.
First things first - I prefer to refer to myself as being more "Powerful" :-)

There is no question that in general the light guys have an advantage in marginal conditions. All other things being equal they can pump onto the plane earlier, point a bit higher and maintain speed through the lulls better.
BUT - not all things are ever equal. If you have excellent pumping technique I am sure you could pump onto the plane early. You can carry a bigger rig and not be so concerned about getting out of range quickly.
I have seen guys close to my size lap me in a race - they have excellent board skills and technique (in comparison to me anyway).
In NSW there is a very healthy Formula racing scene, and we have a class called "Formula Experience +" (FE+). We all start together, but FE+ sailors do one lap instead of two. This creates an environment where people wo are not so capable, fit or committed for whatever reason can race on the same course as the "Senior Fleet", yet not feel in the way. It also encourages the good guys to provide tips, because if they can help you clear the startline early - you will be less likely to get in their way when they come steaming through :-)
generally the winners of the FE+ fleet are promoted to the Senior Fleet, but only by choice. Some people choose to sail shorter courses as it suits them better.

JB
Wannabe
Wannabe
NSW
148 posts
NSW, 148 posts
5 Aug 2009 7:29pm
Rubby said...

What does VMG stand for?


Velocity Made Good
Basically about sailing as close to the wind up wind (or as close to square down wind) with as much speed as possible.

MavericK040
MavericK040
WA
583 posts
WA, 583 posts
5 Aug 2009 7:38pm
Wannabe said...

Rubby said...

What does VMG stand for?


Velocity Made Good
Basically about sailing as close to the wind up wind (or as close to square down wind) with as much speed as possible.




Velocity made good is correct.
the rest may be applicable to sailing but i havnt heard it before.

But in general VMG is the velocity at which you are approching your target or destination and not your actual velocity. hence halling it Velocity Made for the Good.
snides8
snides8
WA
1731 posts
WA, 1731 posts
5 Aug 2009 8:18pm
as i understand it..

vmg has allways been applicable to sailing and the term well used.
your vmg will be calculated based on a known point you are travelling to ie a waypoint on the gps...
if you are heading directly towards your waypoint/target then your vmg will equal your speed.

in other words if your waypoint is directly to windward of you and you and you are sailing at 45 deg to that point(tacking) then your speed towards that point is your vmg (a value lower than your actual speed)...if you are sailing on a square reach at 90deg to the waypoint then your vmg would be 0 as you are not heading towards it. if you are sailing down wind away from your waypoint then your vmg would be a negative.

maybe another way to understand it is...say 2 guys decide to do a downwinder to a assumed point- one guy decideds to sail directly downwind straight to that point,the other guy sets of on a broad reach at high speed...the first guy is travelling at a low speed but is travelling the shortest distance...his vmg is his actual speed.
the other guy is travelling a shed load quicker but is sailing 3 times the distance.
if they both arrived at that mark at the same time then effectively they both had the same..velocity made good...
as i said this is as i understand it.
Rubby
Rubby
65 posts
65 posts
5 Aug 2009 9:43pm
Thanks for the explanations of VMG. I ask partly because I just bought an Aerotech VMG sail. Now that I know what it means, I'm convinced I will enjoy it more.
club309
club309
QLD
66 posts
QLD, 66 posts
6 Aug 2009 12:53pm
i'm guessing it's "velocity made good"
ka43
ka43
NSW
3105 posts
NSW, 3105 posts
7 Aug 2009 9:24am
Velocity Made Good.
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