SEN 717 - 18 Jul 2002
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SCAT Electronic News 18 July 2002 issue 717
Table of Contents
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This weekend at Lost Hills
Flying Model Designer - Toner
Re: SCAT Electronic News 13 July 2002 issue 716 Attachment supplement
HOW MANY STRANDS FOR 30 gm F1B - King
Frank Zaic's 90th birthday - Montes
Prima 2002 - Woodhouse
This weekend at Lost Hills
==========================
Don't forget the MaxMen Summer bash -
be there at 7am on Sat for round 1
Flying Model Designer
=====================
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In the Aviation Week classsified:
Work in a small group dynamic R&D atmosphere. best fit will have a solid
engineering background, broad experience in model aircraft design and
fabrication, flight dynamics, structures and materials, product development
and management, 2 D and 3 D modeling (ACAD and Pro-E utilized).
We need a hands on, intuitive engineer with excellent design sense and
ability to manage concurrent jobs in a dynamic work envirnment. Cooperative
effort and team spirit a must. Cox and Estes brand name.
Excellent benefits, compensation. DOE.
Submit resume electronically in plain text format to:
This email address is being protected from spambots. You need JavaScript enabled to view it.
Ed Toner
Re: SCAT Electronic News 13 July 2002 issue 716 Attachment supplement
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john...sorry, could not open files...please email me your address and i will
send a sae...thanx...best regards...joe mollendorf, western ny free flight
society
[John is at This email address is being protected from spambots. You need JavaScript enabled to view it.]
HOW MANY STRANDS FOR 30 gm F1B (Peter King)
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I have been trying to figure out whether I could get away with only 24
strands in my F1B's with 30gm motors. I thought I would run a simulation
and look at the torque vs TIME graphs. Comparing a 35gm, 26st motor with
two 30gm motors, one of 26 and one of 24 strands, the result was quite
interesting and rather what I had expected. Both 26 std motors were wound
to 95 in/oz and the 24 std, 85 in/oz. Of course with the 30gm motor there
is a little less energy in the first 1.5 to 2.0 secs but after that, although
the 30gm torque is a little lower at any particular point in time the the two
curves for 24 and 26 strand 30gm motors were virtually identical with time.
You then find that the 26strand motor gives out at only ca 38secs whereas the
24 strand motor keeps pushing out power until fold at 46secs. The obvious
advantage of the 24 strand motor was born out by the duration figures, see
below.
Motor Run Duration Loss over 35gms
35 gm 26 strand motor 48 secs 403 secs Zero
30 gm 26 strand motor 38 secs 348 secs 55 secs (13.6%)
30 gm 24 strand motor 46 secs 383 secs 20 secs (5.0%)
It remains to be seen if this is born out in practice but I will certainly be
inclined to go for the 24 strand motor. What have others found about this?
Peter King
Frank Zaic's 90th birthday
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To complement Bill Bogart's notice of the 90th birthday of Frank Zaic, I
can announce that the new issue of Free Flight Quarterly has a
comprehensive tribute to Frank, with articles on him by Louis Joyner,
Jean Wantzenriether and myself. These articles cover diverse aspects of
Frank's signal contributions to our sport/hobby, such as his impact as
artist, aerodynamicist and publisher. A summary of the articles can be
seen in the website of Free Flight Quarterly:
http://www.chariot.net.au/~bluejay/freeflightquarterly.html
As editor of FFQ, I will be very glad to receive shorter reminiscences
from the many modellers who have been in touch with him, to be published
in a future issue of FFQ.
Sergio Montes
Prima 2002
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PRIMA 2002
I have been asked a by a few of you if we would be running the event again.
So it has been decided to repeat the exercise again this year.
There will be two events both run with other contests: -
1. September 15th in conjunction with The Stonehenge Cup at Sculthorpe
2. October 20th in conjunction with the Croydon Wakefield day at Middle
Wallop
These two events will be run to a 3 x 2 minute flights, in rounds, plus an
unlimited fly off. It is expected that Igor will be at the Stonehenge event
to offer help and assistance.
Geoff Kent and myself will be on hand to help.
In addition it has been decided to add a worldwide postal contest as well
for those overseas who want to join in the fun. The postal will be to 5 x 2
minutes plus an unlimited fly off. The flights to be made on any single day
in September or October. The results are to be sent in within 10 days of
making the flights. The scores are to be signed off by your timekeeper.
You can fly the basic Prima, either built from the kit or the ready to fly
model. There are Primaís that have been improved, with the addition of
upgrade parts, these models are eligible. What we ask is that the model is
still following the basic prima concept. If in doubt please ask.
If you want further details of the events or the model please contact me. I
have the kits and the parts in stock.
Michael J Woodhouse, Norwich, UK.
....................
Roger Morrell
