After lurking and reading the many comments re 2 meter at the NATS I
figured it was time to submit my dime's worth..
Let's first look at how 2 meter differs from the only other TD class
(unlimited).. Because there really are just 2 true model classes for
soaring for the major TD classes at the
Yes, but also what's happening (for a fixed wing span) is a trade off
between wing loading and induced drag. Re (at least for DLG chords and up) is
a variable but not the dominant one.
As you increase aspect ratio (reduce chord for a fixed wing span), induced
drag goes down but wing
- Original Message -
From: Rick Bothell
Sent: Thursday, February 17, 2005 10:57 AM
To: [EMAIL PROTECTED]
Subject: f3j team wanted
Wanted: To either form a 4 person F3J team or to join a team that is short a
flyer to fly in the Soaring in the Rockies on May 28,29. Denver, Colorado
Hi Gordy,
Just happened to see your post about being in Melbourne. What sort of
soaring were you interested in? How long are you here for? Did you
bring any planes?? :)
I'm mostly into slope soaring but I don't know if I can get out
anywhere this weekend... Nevertheless, you're welcome to get
Had all but decided on Tempest when the water got muddy. Someone(read
Edgar Soaring Junkie) suggested I consider the Sharon. So, I'm
asking for input. Probably the main criteria I have is that it be able
to hi-start. I do not have a winch readily available to me(and the club
winch has seen
Did you bring any planes??
Are you kidding? Gordy never goes anywhere without an airplane; he will
likely be buried with his Pike Superior. :)
-Original Message-
From: AntonL [mailto:[EMAIL PROTECTED]
Sent: Friday, February 18, 2005 05:33
To: soaring@airage.com
Subject: [RCSE] Re: Hey
Hi guys,
I haven't been flying as much as I use to, but when I do, I find my little
1.5m Koleos electric is the planeI grab. Its small and lightenough I
can fly from the small field behind my house where my larger electrics aren't
comfortable. The Koleos is getting pretty worn out, and I am
Wind Dancer!
http://www.polecataero.com/
Based on the Allegro E-Lite. RES, built up,
lightweight.
A few guys were flying thesefor Spd
400 during the 2004 ESWC in New Mexico.Two of themplacedsecond
and third.
Aradhana Singh Khalsa
Registrar
2005 F5J Electric Soaring
Challenge
October
Someone recently was looking for a laser that would project a crosshairs at
the floor. I don't remember who it was (sorry) but I came across a Bushnell
PivotPoint Laser Level # 82897 at the local Fry's grocery store that fits
the bill. It will project a dot, line , or crosshairs anywhere from
Hi Stan
For me the best all around ship is the new Escape Lt. from Aero Model
http://www.aero-model.com/ProductDe...x?productID=429 It only weighs 68 oz
(it will go up on a good hi-start or a weak winch with no problem) but can
carry, safely, up to 24 oz. of ballast. So you have a plane that is
Stan,
I picked up this very plane (incidentally pushed by the very same
person. Edgar gets around ;-) last November. It's big, but that also means
it's heavy. If you high-start is iffy for the Artemis, it's not going to be
enough for the Sharon. If you go with the Sharon, either upgrade
Sorry the links didn't work. Here are corrected ones.
http://www.aero-model.com/ProductDetails.aspx?productID=429
http://www.rcgroups.com/forums/showthread.php?p=3174690#post3174690
- Original Message -
From: Stan Myers [EMAIL PROTECTED]
To: Soaring Digest soaring@airage.com
Sent:
There was a study done by Blaine K. Beron-Rawdon of Envision Design, at
least a few years ago. I will post this to news:rec.models.rc.soaring for
your perusal. The study spanned several wingpans and aspect ratios and has
a document that summarizes the results.
E-mail if you need a copy
Dave,
A while back I sent you some comments on my admittedly amateurish approach
to 2M based on Martin Simons work back in the 80's. AR's are around 6
- max chord around 16, min = around 8 Would you care to discuss how
this approach fits into your current discussion?
RVC
At 12:59 PM
Hi folks,
Before I get lured away by a friend wanting to split shipping on some
scale models, does anyone have any F3B models for sale that would make
good practice ships? There's a group of us who have decided to learn to
fly the tasks properly this season, and from what I've been learning my
This does not seem to be dimensionally correct.
In english units D is in lbs., V is in ft/sec, W/L is in lb/ft^2, and rho
(density) is in slugs/ft^3 (gotta love those english density units!).
Converting from density to weight (density * g ) gives the left side in lbs
and the
right side
A number of things trade off. As aspect ratio goes up, Cavg goes down while
W/L goes up (both numerator effects). Meanwhile, V^2 goes up (denominator
effect) as W/L goes up for a relatively constant Cl (assuming the plane
maintains approximately the same AoA at min sink or max L/D,
What Mike said!!!
My new custom 2M is on the board.
I love my Open Class ships, but I really enjoy the challenge of 2M. A high
placing finish with a 2M means much more to me than the same finish with an
open class ship. I'll keep both spans and be very happy flying both (and
RES too).
There
Is the problem the term aspect ratio? For his project he's probably using a
plank wing. Aspect ratio is a term that can be applied. What happens to
the same span if the planform becomes elliptical? Do you still apply the
same aspect ratio?
Out of practical experience there is a big difference
Sorry,
The attachment seems to be prohibited by the newsgroup. I will make the
attempt soon or later to get this on my website, but for now, I will honor
e-mail requests for those who need the documents.
Or should I e-mail it to the exchange??? (one no and I will not)
Tom Koszuta
Western
Gentlemen,
Here is the breakdown of how the Wood Crafters 05 participants have chosen
to have fun flying their woody sailplanes at the AMA flying site in Muncie,
IN , May 26 thru 29, 2005. Hopefully, this will give other persons or clubs
insight into the events people enjoy and incorporate these
At 10:26 AM 2/18/05 -0600, Stan Myers wrote:
Had all but decided on Tempest when
the water got muddy. Someone(read Edgar Soaring Junkie)
suggested I consider the Sharon. So, I'm asking for input.
Probably the main criteria I have is that it be able to hi-start. I
do not have a winch readily
Selling my back up Extreme cross tail sailplane. This is the LT version in
yellow and dark blue.
The wing and tail are practically new with very few flights. It is equipped
with HS 125 superflat on the ailerons, JR 368s on the flaps and elevator
and a HS 81mg for the rudder. Includes Hitec
In a message dated 2/18/2005 12:47:33 PM Central Standard Time,
[EMAIL PROTECTED] writes:
D(N) = [ W(N)/L(m) ]^2 / [Pi*q(kg/m*s^2)],
(note, that W = m*g (N = kg*m/s^2)), therefore for the units:
N = [N^2/m^2]/[kg/m*s^2] = N^2*s^2/kg*m = N^2/N = N
So nothing is missing, there is no average
Dave,
OK, we've got a nomenclature difference (it's always the communication
issues, isn't it?)
In my original message I said the induced drag is proportional to SPAN LOADING,
not wing loading, for a fixed span wing. That is really all I am trying to show
you:
Di = (W/L)^2 / (Pi*q), where
I didn't go through it to see if this looks like the source of
confusion, but don't forget that bugaboo of English units, the
pound-force. Commonly abbreviated lbf, the pound force is defined as
the force required to accelerate one pound-mass at a rate equal to l
standard G, 32.17417
After lurking and reading the many comments re 2 meter at the NATS I
figured it was time to submit my dime's worth..
Let's first look at how 2 meter differs from the only other TD class
(unlimited).. Because there really are just 2 true model classes for
soaring for the major TD classes at
Test.
Seems awfully quiet this evening...
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