WGC 2008 TP radius?

[Andy[_1_]]

Anyone know what is the TP radius for assigned speed (racing) tasks at
Lusse? Is it posted on the official site somewhere?

Andy

[Don Johnstone[_3_]]

At 23:29 06 August 2008, Andy wrote:
>Anyone know what is the TP radius for assigned speed (racing) tasks at
>Lusse? Is it posted on the official site somewhere?
>
>Andy
>
I would have to assume 500m radius

[Ian Strachan]

On Aug 7, 12:29*am, Andy > wrote:
> Anyone know what is the TP radius for assigned speed (racing) tasks at
> Lusse? *Is it posted on the official site somewhere?

The rules for World Championships are in Annex A to the Sporting
Code,
see http://www.fai.org/gliding/sporting_code/sc3a

Many other competitions also use these rules, to save the organisers
making separate rules.

On TP radius, Annex A says:

7.5 TURN POINTS AND ASSIGNED AREAS
7.5.1 The Observation Zone for a GNSS Turn Point shall be a cylinder
of radius 0.5 km, centered on the turn point.

Ian Strachan
Lasham Gliding Centre, UK
Sent during the UK 20m National Championships

[Andy[_1_]]

On Aug 7, 1:56*am, Ian Strachan > wrote:
> 7.5 TURN POINTS AND ASSIGNED AREAS
> 7.5.1 The Observation Zone for a GNSS Turn Point shall be a cylinder
> of radius 0.5 km, centered on the turn point.


Thanks to both of you. We use 0.25 statute mile in US and that is a
smaller radius.


Andy

[Andy[_1_]]

On Aug 7, 5:42*am, Andy > wrote:
>*We use 0.25 statute mile in US and that is a
> smaller radius.

John Good's blog now has the explanation I, and I'm sure many other US
pilots, had been waiting for.

http://www.usteamluesse2008.blogspot.com/

0.5sm is of course larger than 0.5Km.

Tough way to lose points.


Andy

[[email protected]]

On Aug 7, 8:42*am, Andy > wrote:
> On Aug 7, 1:56*am, Ian Strachan > wrote:
>
> > 7.5 TURN POINTS AND ASSIGNED AREAS
> > 7.5.1 The Observation Zone for a GNSS Turn Point shall be a cylinder
> > of radius 0.5 km, centered on the turn point.
>
> Thanks to both of you. *We use 0.25 statute mile in US and that is a
> smaller radius.
>
> Andy

US turnpoint radius for MAT and AST is now 1 mile which is intended to
reduce meaningless penalties for small misses and slightly spread the
fleet at the turn for , hopefully, enhanced safety.
Cheers
UH

[Andy[_1_]]

On Aug 7, 9:22*am, wrote:
> US turnpoint radius for MAT and AST is now 1 mile which is intended to
> reduce meaningless penalties for small misses and slightly spread the
> fleet at the turn for , hopefully, enhanced safety.
> Cheers
> UH

Oops. I forgot that change, probably because I haven't flown a
contest for over a year. Brain reverted to old memories. Thanks for
the correction.

Andy

[Ian Strachan]

On Aug 7, 1:42*pm, Andy > wrote:

>We use 0.25 statute mile in US

Question:

What is a US Statute Mile in terms of feet or metres?
The term "Mile" is ambiguous. There are lots of different "miles",
for instance there are theoretically an infinite number
of different lengths of Nautical Mile ....

But only one definition of a Metre, and therefore a Kilometre.

This is one reason why IGC has always used metric units
for International definitions (Badge distances, for instance),
and science uses the SI system which is basically metric
(I stand by to be corrected on this statement).

Ian Strachan

[Paul Remde]

Hi Ian,

The term "Statute" clarifies the type of "miles". It is different from a
nautical mile. US Contests use Statute Miles because Americans are used to
driving distances in statute miles. You can find conversions here:
http://www.onlineconversion.com/

Like many Americans - I prefer the metric system as well. Much of my
college engineering education was done using metric units.

Good Soaring,

Paul Remde
Cumulus Soaring, Inc.
http://www.cumulus-soaring.com

"Ian Strachan" > wrote in message
...
On Aug 7, 1:42 pm, Andy > wrote:

>We use 0.25 statute mile in US

Question:

What is a US Statute Mile in terms of feet or metres?
The term "Mile" is ambiguous. There are lots of different "miles",
for instance there are theoretically an infinite number
of different lengths of Nautical Mile ....

But only one definition of a Metre, and therefore a Kilometre.

This is one reason why IGC has always used metric units
for International definitions (Badge distances, for instance),
and science uses the SI system which is basically metric
(I stand by to be corrected on this statement).

Ian Strachan

[jcarlyle]

Ian,

Paul didn't really answer your question. A Statute Mile in the USA is
defined as 5,280 feet. The Nautical Mile length in feet isn't as
clear, as you point out. I've seen 6,080 feet, 6,076 feet and 6000
feet.

-John

On Aug 8, 6:12 am, Ian Strachan > wrote:
> What is a US Statute Mile in terms of feet or metres?
> The term "Mile" is ambiguous. There are lots of different "miles",
> for instance there are theoretically an infinite number
> of different lengths of Nautical Mile ....
>
> But only one definition of a Metre, and therefore a Kilometre.
>
> This is one reason why IGC has always used metric units
> for International definitions (Badge distances, for instance),
> and science uses the SI system which is basically metric
> (I stand by to be corrected on this statement).
>
> Ian Strachan

[Richard[_1_]]

On Aug 8, 3:12*am, Ian Strachan > wrote:
> On Aug 7, 1:42*pm, Andy > wrote:
>
> >We use 0.25 statute mile in US
>
> Question:
>
> What is a US Statute Mile in terms of feet or metres?
> The term "Mile" is ambiguous. *There are lots of different "miles",
> for instance there are theoretically an infinite number
> of different lengths of Nautical Mile ....
>
> But only one definition of a Metre, and therefore a Kilometre.
>
> This is one reason why IGC has always used metric units
> for International definitions (Badge distances, for instance),
> and science uses the SI system which is basically metric
> (I stand by to be corrected on this statement).
>
> Ian Strachan

Ian,

Most aircraft in the US use the Nautical System, ie Commericial,
Military and most private aircraft. 1 Nautical mile = 1 second of
latitude, 60 nautical miles = 1 degree of latitude.

Richard
www.craggyaero.com

[[email protected]]

On Aug 7, 1:29*am, Andy > wrote:
> Anyone know what is the TP radius for assigned speed (racing) tasks at
> Lusse? *Is it posted on the official site somewhere?
>
> Andy

1/2 kilometer. Unfortunately, Karl Stiedieck had 1/2 mile mistakenly
in his SN10, was not scored for a turnpoint he made, thus scored as
landed out several days ago - ouch
DJ

[Michael Ash]

Ian Strachan > wrote:
> On Aug 7, 1:42?pm, Andy > wrote:
>
>>We use 0.25 statute mile in US
>
> Question:
>
> What is a US Statute Mile in terms of feet or metres?

It's defined as 5280 "survey feet", and the survey foot is in turn defined
as 1200/3937 meters.

> The term "Mile" is ambiguous. There are lots of different "miles",
> for instance there are theoretically an infinite number
> of different lengths of Nautical Mile ....
>
> But only one definition of a Metre, and therefore a Kilometre.

The statute mile may be weird and inconvenient, but it's no more imprecise
than the kilometer.

--
Mike Ash
Radio Free Earth
Broadcasting from our climate-controlled studios deep inside the Moon