SEN 869 - 15 Apr 2004
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SCAT Electronic news 15 April 2004 issue 869
Table of Contents
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Big Al's Notice - Ghio
F1Q and controllers = Linkosalo
F1Q, Electric FF - Boutillier
Oracover - Lorbiecki
Big Al's Notice
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Bissonnette Memorial
Lost Hills-Bissonnette Mirage Field
May 28,29&30, 2004
Sanction No. 04-0460
America's Cup Contest
Friday evening, May 28
2003 Big Al's Shootout - F1A-F1B-F1C (cancelled last May due to high winds)
One flyoff flight per event. First event will start at 8 pm.
Saturday, May 29
F1A-F1B-F1C
Round 1 8:00 - 9:00 F1A/F1B - 210 sec, F1C - 240 sec
Round 2 9:10 -10:10 180 sec for all following rounds
Round 3 10:20 -11:20
Round 4 11:30 - 12:30
Round 5 12:40 - 1:40
Round 6 1:50 - 2:50
Round 7 3:00 - 4:00
Flyoffs start at 5:00 pm. Ten minute rounds with ten minutes between
events. Each contestant that is in a flyoff must provide a timer for the
timer pool for that round. No timer, no can fly! Please bring a timer and
help out with all the events.
Sunday, May 30 Big Al's Shootout - F1A-F1B-F1C / F1G-F1H-F1J
Big Al's Shootout - F1A-F1B-F1C
This is a separate event from Saturday's contest. Please bring a timer
along or have a flyer from one of the other events time for you. High time
award for each event.
Entry Fee: Free ( no cost, just have fun )
Round 1 6:30 - 6:40 F1A 360 sec
Round 1 6:50 - 7:00 F1B 480 sec
Round 1 7:10 - 7:20 F1C 480 sec
Round 2 7:30 - 7:40 F1A 300 sec
Round 2 7:50 - 8:00 F1B 360 sec
Round 2 8:10 - 8:20 F1C 360 sec
F1G-F1H-F1J
Round 1 10:00 - 11:00 120 sec for all rounds
Round 2 11:10 -12:10
Round 3 12:20 -1:20
Round 4 2:30 - 3:30
Round 5 3:40 - 4:40
Flyoffs start at 5:00 pm. Ten minute rounds with ten minutes between
events. Each contestant that is in a flyoff must provide a timer for the
timer pool for that round. No timer, no can fly! Please bring a timer and
help out with all events.
Entry Fee: $20.00 Open/ Senior for first event, second event $10.00. $5.00
Junior per event. Lost Hills Association membership required.
Awards: Trophies for F1A, F1B, F1C, F1G, F1H & F1J. Glass Mugs for 2003
and 2004 Big Al's Shootout. Glass Mug High Time awards for Juniors in all
Six Events.
CD- Walt Ghio phone: 209-478-8225, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
F1Q and controllers
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Jack Reid wrote:
[Piece about brushless motors needing a speed controller to run - snipped]
> I have yet to run across a device to replace the radio controlled pulse
> generator, which would make brushless motors viable for free flight
> use. Maybe someone out there has, or maybe some electronic wizard could
> concoct a combination brushless motor controller/pulse generator/motor
> run timer for our use. In either case, I'd like to hear from them.
Actually, any digital timer, running a servo as an actuator, would also
work as pulse generator to run a brushless motor via a speed controller.
After all, with RC equipment a speed controller is run as if it was a
servo. You may need to program in a spesific starting sequence as the
modern speed controllers are rather fancy, using self calibration and some
safety features to avoid starting the motor by accident, but this is just
a matter of writing a few lines of code. I did such a modification to my
F1B digital timer, so that one servo is running the tail feathers as
usual, the other connector starts and stops an electric motor via a speed
controller. The nice feature with this approach is that you get to power
for the timer from the motor battery...
It would be easier to wire a brushed motor by just a switch between the
battery and motor, but this may not be good for the power train. A
reduction gear and a big prop have quite some inertia, producing a
significant stress to the system if power is just turned on instantly,
Thus I think that even if the rules went to claim brushed motors only, it
still would be better to use a pulse generator and a speed controller to
start and stop the motor, to turn power on and off gradually.
-Tapio-
[No one has approached me about a BlackMagic timer for
F1Q - we could do that if required ...
Roger Morrell]
F1Q, Electric FF
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For information: the French FFTC has released a provisionnal national
formula:
- Total area: 32-34sq.dm.
- Max loading 50g/sq.dm.
- Brushed motor, max type 480 race (brushless motors prohibited)
-Max 7 elements 1.2volts (Ni-Cd,Ni-Mh)
- Direct drive prop (no gear)
- 12 amps fuse automotive type
-Motor run:25sec.
-Flight duration: 180sec.
I understood that this formula already exists in the Netherlands.
Thermals.
Bernard B.
Oracover
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We have the two F1P models ready to cover and decided to look at Oracover. We c
ompared it to Icarex and here is what we found. The wings that we covered are o
f typical carbon construction, albeit, somewhat heavy because this was our firs
t shot at the F1P design.
Spars were big (1/4") and the D boxes where probably too wide (Made them to the
high point of the airfoil for maximum spar depth). The 205 square inch wing pa
nel (410 sq inch total). weighed in at 45 grams each uncovered. Thru Hobby Lobb
y, we purchased the solid color red and yellow. The price was about $9 a roll a
nd delivery was prompt.
The first thing I found out was that it shrunk quite a bit, which made getting
wrinkles out pretty easy. However, when I attempted to cover to a middle rib, i
t badly warped the rib. So, we needed to cover from main rib to tip. This worke
d out just fine. Weighing the wing, we came up to 64 grams. Our thought was tha
t this was quite heavy.
Took a wing from model number two (same size, same weight) and covered it with
Icarex. Total weight of this panel came up to 61.5 grams! We were surprised, ne
edless to say. John and I had talked about recovering the Oracover covered wing
, but felt that the 8 gram difference wasn't worth it. We don't know about the
durability verses the Icarex, but it is worth the experiment. BTW, we covered t
he undercambered model with the Oracover and had no problems sticking it to the
undercamber.
Thought you may be interested in this!
John and John Lorbiecki
PS- If you are interested in seeing the uncovered F1P, feel free to contact me
and I will send you a picture or two...
.................
Roger Morrell
