SCAT Electronic News August 16 1999
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SCAT Electronic News August 16 1999
Table of Contents
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The Composites Store - Gewain
Bird Aerodynamics - Dilly
ABC FF
Bird Flight - Brush
The Composite Store has moved
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The Composites Store recently moved into a much larger building so we will
have enough room for our inventory and to grow with more new materials.
Our new address is Mountain Valley Airport Hanger #2, Tehachapi CA. Our
Mailing Address and Toll Free Phone Number have not changed, They are PO
Box 622 Tehachapi CA 93581 and Toll Free Order line of 800-338-1278.
We are also extending our hours so now we will be open 8-5 Monday-Friday
and 9-1 Saturdays.
Moving was a good reason to have another BIG FIBERGLASS SALE. So we put
the most popular styles of Fiberglass, Carbon Tissue and CA glue on sale
with up to 50% off.
We are also discontinuing some Olfa Tools to make room for new items, so we
put them on sale.
And we found some damaged Heavy Mylar, Carbon Tissue and Glass Cloth so we
are selling it at Nearly Give Away Prices.
All the details of the sale are on our Web Site at www.cstsales.com. Or
call the toll free order line and ask for more details on the sale.
Thanks
Matt Gewain
Bird Aerodynamics
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Roger,
Regarding the question of bird aerodynamics, I do recall an article
in Scientific American about 15 years ago by a German living in Kenya, who
had spent some time using a motor-glider to soar with vultures. There
wasn't much on the aerodynamics, but one point about the lifestyle (ugh,
-what a word!) of the vulture is that you spend the night on a cliff or
somewhere else that's high above your local plain and then wait for the sun
to warm things up enough for the thermals to start before chucking yourself
off and gliding till you find the lift. This is because you usually don't
have enough energy left to actually raise yourself into the air by
flapping, You then keep your eyes peeled till you see some other vultures
circling, assume they'e spotted (smelt?) something good and dead, and go
over to join them for a nice energy-packed meal.
There was also an NACA (possibly NASA) paper probably at least 25 years ago
that Jack North dug up that looked at the soaring habits of, I think,
turkey vultures, and suggested that a pretty low aspect ratio and a
thermalling circle of the order of five wingspans or so was the way to go.
I don't recall if it touched on airfoils, though.
On a separate topic, it was good to see that very sensible letter from Jon
Davis on the BoM business, and how good to see him back in free-flight
again, too. Here in the UK we've had some pretty hysterical stuff in what
passes for the model press here, generating a lot of heat and next to no
light, so it was a change to see a balanced opinion on something that for
most of us is no big deal, and may actually encourage a few new faces to
get into free-flight.
Martin Dilly
ABC FF
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Kind attention Roger MORRELL.
I have a phone discussion with Jos Melis 5 minutes ago.
He tell me that he stop selling free flight items due to the high
competition by others.
Can you give me some good web sites to buy some tail boom and other
items who are made in Rissia and Ukraine.
Many thank's in advance for your reply.
Best Regards,
Michel DJIAN
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[There are addresses of suppliers on the SCAT web site
www.aeromodel.com/scat
For Russian and Ukranian suppliers Vivchar - F1B and
Stamov and Yabonovsky F1A have posted recent price lists.
See also Mike Woodhouse in the UK and FAI Modelsupplies in the US.]
Bird Flight
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Jack Parham, an Englishman and licensed pilot, authored a book in the
early 40s titiled "Bird Flight for Bird Lovers." This is written in
simple language and rather light heartedly, telling of the fascinating
similarity of bird flight to airplanes. Perhaps, not scientifically
documented, but his personal observations are very valid to stimulate
the mind to futher research.
I will send the book to Gil Morris if he sends me his mailing address
but any others that would care to
peruse the book are welcome. Contact Gil so he can forward it through
any potential circuit.
Al Brush
....................
Roger Morrell
