<DG> Important Tips for Winter Golf
Vbosch
1. Do not throw your favorite disc. It will break. I promise.
2. Avoid white plastic in snow. Avoid yellow snow altogether.
3. Do not touch your tongue to the pole hole.
4. Those little hand warmer packets are gifts from God.
5. Forget about distance until Spring. The air is slower in Winter.
6. Gor-tex socks. Accept no substitutes.
7. Beer freezes.
8. Waterproof mascara. (Personal experience tip; completely optional)
Eric Simon
: Important Tips for Winter Disc Golf Play:
:
: 5. Forget about distance until Spring. The air is slower in Winter.
Anyone know why (or if) this is true?
: 8. Waterproof mascara. (Personal experience tip; completely optional)
(Can some of us skip this tip?)
Martin Melhus
>Vbosch (vbo...@aol.com) wrote:
>: Important Tips for Winter Disc Golf Play:
>:
>: 5. Forget about distance until Spring. The air is slower in Winter.
>
>Anyone know why (or if) this is true?
The air is both colder and contains less absolute moisture. Both of these
factors increase the density of the air, which increases the viscous losses
that disc flight causes, so a throw of a given energy will dissipate its energy
more quickly, and cover less distance.
If this is too vague, or to technical, please ask, and I'll explain in more
detail.
Mark Mudgett
Eric Simon <er...@access2.digex.net> wrote:
>Martin Melhus (mel...@fdrc.iit.edu) wrote:
>: The air is both colder and contains less absolute moisture. Both of these
>: factors increase the density of the air, which increases the viscous losses
>
>*less* moist is considered *more* dense. Isn't moisture heavier than air?
Air is about 80% diatomic nitrogen (N2), molecular weight about 28 daltons,
and 20% diatomic oxygen (O2), molecular weight about 32. Water vapor (H2O)
has a molecular weight of about 18, much lighter than air. When the water
condenses into liquid droplets suspended in air (fog, cloud, etc.), it's a different
story. Liquid water is much more dense than air.
Clear dry air is more dense than clear humid air. Foggy air is even more dense.
kim theesen
:
: >Anyone know why (or if) this is true?
: The air is both colder and contains less absolute moisture. Both of these
: factors increase the density of the air, which increases the viscous losses
: that disc flight causes, so a throw of a given energy will dissipate its
: energy
: more quickly, and cover less distance.
: If this is too vague, or to technical, please ask, and I'll explain in more
: detail.
I just love it when you talk technical. Talk to us...
Thanks...
Kim
#7513
Lincoln, NE
B Lav
> : >:
> : >: 5. Forget about distance until Spring. The air is slower in Winter.
> : >
> : >Anyone know why (or if) this is true?
> :
> : The air is both colder and contains less absolute moisture. Both of these
> : factors increase the density of the air, which increases the viscous losses
> : that disc flight causes, so a throw of a given energy will dissipate
its energy
> : more quickly, and cover less distance.
> :
> : If this is too vague, or to technical, please ask, and I'll explain in more
> : detail.
>
> *less* moist is considered *more* dense. Isn't moisture heavier than air?
Water molecules are larger than the other gaseous molecules that make up
the atmosphere. If you think about H20 (3 atoms) and its v-shaped
structure, it takes up more space than, say oxygen (O2) or nitrogen (N2).
So when water is in the air, there are less molecules in a given amount of
space. That's why barometric pressure falls when it's going to rain.
x
Martin Melhus
>>
>> I can understand it easily enough - but I'm suprised that are which is
>> *less* moist is considered *more* dense. Isn't moisture heavier than air?
>
>Water molecules are larger than the other gaseous molecules that make up
>the atmosphere. If you think about H20 (3 atoms) and its v-shaped
>structure, it takes up more space than, say oxygen (O2) or nitrogen (N2).
>So when water is in the air, there are less molecules in a given amount of
>space. That's why barometric pressure falls when it's going to rain.
Sorry, but I don't think that this is correct. In a gas, all molecular species
take up about the same amount of space (to 1-2%) unless you're talking about
some really huge organic molecules (like C8H18 - octane, or something even
bigger yet. Even then, they are only about 10% "larger".)
The actual answer is that dry air consists of about 70% Nitrogen (N2) and 30%
Oxygen (O2.) The atomic weights of N2 and O2 are 28 and 32 gms/mole,
respectively. Remember that the molecule is nitrogen TWO, doubling the atomic
weight. Now, add some water vapor to this mix. H2O has an atomic weight of 18
gms/mole. So the water vapor takes up the same space as a N2 or O2 molecule,
but weighs about 1/3 less. Therefore, the density of wet air is less than the
density of dry air, at a given temperature.
Another factor to complicate the issue is that when the relative humidity is
50% at 85 F, there is about 20 times (ballpark estimate) as much water vapor in
the air as when the relative humidity is 100% at 35 F. This is because
relative humidity is expressed as a percentage of saturation, and warm air can
hold a LOT more moisture than cold air.
Bottom line - several factors contribute to make the density of air greater
when it's cold, so don't expect awesome distances in the winter. Factoring in
heavy clothing, dense air, and poorer footing (in general), I'd guess that
distances would be down 20-30% during winter golf, as opposed to summer golf.
Of course, your mileage may vary. I'd be interested to see what differences
people come up with experimentally, so if anyone has solid info on this, please
post.
Thomas F. Monroe
=20
=FE=F2jeans =F8=C4and long sleeve T-shirts on. Good Grief..!!!
Steven A. Hocevar
> It's really hard to get big "D" down here in FL. in the winter with these
Ohhhhh. I feel for ya.....
I bet hurricans can be a bit of a bitch too, eh??
--
Steve Hocevar, Alberta, Canada Steve....@CRHA-Health.ab.ca
* He who dies with the most toys......has some explaining to do. *