SCAT Electronic News 28 April 2001 issue 573
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SCAT Electronic News 28 April 2001 issue 573
Table of Contents
=================
Patron Support for the 2001 NFFS Symposium - Terzian and Vanderbeek
12th Annual Northern California FF Champs - Terzian
new 1/8" April Tan II - Clapp
InterCites FAI Rounds - Shailor
rolled booms - Stiles
Sympo 2001 - Jahnke
Science Olympiad S. Cal state competition results - Baxter
Rocky Mountain Regionals, Colorado. - Skykieng
FAI Results from Eastern Free Flight Championships - Kerr
Walleen and Wing Twist - Bogie
Tan II ratings - Clemens
Getting a molded balsa boom straight. - Toto in Kansas
Balsa Bugs / Aeronuts - Markos
Patron Support for the 2001 NFFS Symposium
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Author : This email address is being protected from spambots. You need JavaScript enabled to view it.
Bill Vanderbeek, Chairman of the National Free Flight Society's Patron
support of the annual Symposium has agreed with me to publicize this
endeavor electronically. Those who are current NFFS members have already
received a mailing asking for their support.
Time is of the essence since a cutoff date has been established if
supporters would like to have their name(s) (or institution) included in the
printing.
Fred Terzian
Fellow Modeler,
This year 2001 marks the 10th year I have solicited for Patrons to support
the cost of publication of the NFFS Symposium. Last year at the NFFS
banquet, at the Nationals, I received an award for this effort and thank all
NFFS members for that recognition.
The support of the NFFS Symposium last year was great. The list of Patrons
is stable with some falling off and others taking their place.
The 2001 Symposium is edited by Ross Jahnke and again promises to be a good
one. An interesting mix of articles including: Louis Joyner "The Impact of
Technology on Free Flight", Tom McCoy "Contemporary Building Techniques for
SAM Models", Rex Hinson "Jigs & Fixtures: Don't Build Without Them", Charles
Groth "Design Theory for Electric A & B Models. Along with the Ten Models of
the Year and the NFFS Hall of Fame we will have another great Symposium.
Inflation has caught up with us. This year we are asking for a minimum
donation of $40.00 to offset the initial cost of printing the Symposium. For
your donation you will receive a copy of this year's Symposium, sent by
Priority Mail in the U.S. as soon as it is available. In the U.S. you may
deduct any amount over $25.00 from your taxes as a charitable donation.
Don't Put This Off! Please fill out the information as described below with
your donation. We want to get your name or organization correct so proper
credit is given for your donation inside the Symposium on the Patron's page.
Place the information and your check into an envelope with a first class
stamp and mail it immediately. We need donations returned no later than May
2, 2001 to include names in the printing. Late donations will not be
included in the printing of the Symposium.
Thank You in advance for your prompt reply.
Thermals---
Bill Vanderbeek, AMA 853, SAM 1702
NFFS 2001 Symposium
13300 Simon Lane
Los Altos Hills, CA 94022
Print Your Name or Organization as you would like it to appear in the
Symposium
Name____________________________________________________________
Address__________________________________________________________
City, State, ZIP_____________________________________________________
Amount of Donation__________________
Make Checks Payable to: N.F.F.S. (Minimum Donation = $40.00)
12th Annual Northern California FF Champs
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Author : This email address is being protected from spambots. You need JavaScript enabled to view it.
A reminder that next weekend (May 5th and 6th) is the 12 Annual Northern
California FF Champs sponsored by the Oakland Cloud Dusters at Waegell Field
near Sacramento.
In a previous notice, we had forgotten to include the one time field use fee
of $3.00 per contestant. Please add that to the posted entry fee.
However, if you have a "Friends of Waegell Field" card for 2001, this will
"entitle you to all privileges thereof, including free field rental at all
contests at Waegell Field", for the remainder of the year. Purchase of a
"Friends of Waegell Field" card will be made available at this contest's
registration table for $50.00.
Oakland Cloud Dusters
12th Annual Northern California Free Flight Championships
Waegell Field, Sacramento California
May 5th and 6th, 2001
AAA Category II or III AMA Sanctioned Contest
An America's Cup, National Cup, and CUFFMAC Points Contest
Entry Fee: One Event $15.00 Two or more Events $30.00 Jrs $2 per event
$5.00 discount with proof of NFFS membership for two or more events
Field Rental $3.00 per contestant (excluding Juniors) Free with holders of
"Friends of Waegell Field" card
Contest Directors: Bill Vanderbeek, Fred Terzian
Cash Awards will be drawn on Sunday. Contestants will receive one ticket
with entry fee. Must be present to win.
One Design Event: Vic Cunnyngham's 1/2A Space Rod-NFFS Nostalgia Rules Tee
Dee .049 or .051 acceptable
Contest Schedule
Saturday Events Sunday Events
8 a.m. to 5 p.m. 8 a.m. to 3 p.m.
F1A Glider (seven rounds) F1G Coupe (five rounds)
F1B Wakefield (seven rounds) F1H Towline (five rounds)
F1C Power (seven rounds) F1J Power (five rounds)
B Gas Dawn Unlimited 15 min. after sunrise
1/2A Gas A Gas
P-30 Rubber C-D Gas
020 Replica 1/4A Gas
O.C.D. Catapult Glider Mulvihill Rubber
Hand Held Catapult Glider Moffett Rubber
Slow Open Power Hand Launch Glider
Both Days
Straight Tow A-1 Glider (1960 AMA Rules)
Junior Hand Launch Glider Old Time Hand Launch Glider
Junior Hand Held Catapult Glider Junior P-30 Rubber
Junior A-1 Nordic Towline Junior 1/2A Gas
Old Time Small Rubber Cabin Old Time Small Rubber Stick
Old Time Large Rubber Cabin Old Time Large Rubber Stick
Early 1/2A Gas Nostalgia Mulvihill Rubber R.O.W.
1/2A Gas Nostalgia A-B-C Ignition Old Timer
A Gas Nostalgia A-B-C-D Gas R.O.W. Combined
B Gas Nostalgia 4 Ounce Wakefield
C Gas Nostalgia 8 Ounce Wakefield
1/2A Gas Rise Off Water Old Time Rubber Scale
One Design Event (Space Rod) Gollywock/Jabberwock
FAI Events: One hour rounds beginning at 8:00 a.m. Flyoff flights will
increase in two minute increments
Slow Open Power Rules: Engine displacement up to .21 cu. in. No ball
bearings, no tuned pipe, no prop brake no auto surfaces (except DT).Any
tank/fuel system. Engine run: 8 seconds glow, 9 seconds diesel. Three
flights with a two minute max. Single flyoff flight at end of day
Contest Information:
Bill Vanderbeek Fred Terzian Steve Geraghty
13300 Simon Lane 4858 Moorpark Ave. 4165 Timberline Drive
LosAltos Hills,CA 94022 San Jose, CA 95129 San Jose, CA 95121
1-650-949-3366 1-408-725-1390 1-408-528-9145
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MOTELS
Days Inn Marriott Courtyard Fairfield Inn
10800 Olson Drive 10683 Whiterock Road 10713 Whiterock Road
Rancho Cordova 95670 Rancho Cordova 95670 Rancho Cordova 95670
1-916-638-2500 1-800-321-2211 1-800-228-2800
Waegell Field is located southeast of Mather AFB near the corner of Sunrise
Blvd. And Jackson Highway. From the Stockton area, it is best to take
Highway 99 north past Lodi and go northeast on Grant Line Road just below
the town of Elk Grove. Continue on Grant Line Road until you cross an
aqueduct then bear left onto Sunrise Blvd which heads due north. Cross
Jackson Highway at the four-way signal lights and count approx. 14 telephone
poles from the corner on the right hand side. After that you will see a gate
leading towards a sheep shed and pen. This is Waegell Field.
new 1/8" April Tan II
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Author : This email address is being protected from spambots. You need JavaScript enabled to view it.
Please be advised that April ( 1/8" ) tan II is VERY GOOD !
Confirmed by three independent testers, the Factory, and a coupe test
flight. Limited supply available. More coming in late May
( all sizes including more 1/8"). The Factory has confirmed what they
suspected all along, one of the synthetic additives must be specially
made to spec by another firm to produce good Tan II.
Lets hope that this is the beginning of the end of sub standard rubber!
Thermals! John and Sally
[I did try one of these motors at today's convocation of the Lake
Elsinore Wakefield Dudes - One of the other [dudes] put almost 500 turns on
a 28 strand motor and I put almost 450 on a 30 strander to get a performance
about like May 99. The rubber seemed very durable as we were both able
to get 2 flights on the motors]
InterCites FAI Rounds
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Author : This email address is being protected from spambots. You need JavaScript enabled to view it.
Subject : Re: SCAT Electronic News 23 April 2001 issue 572
Roger,
We have revised the rounds schedule for the Inter-Cities meet. Instead of
flying one hour rounds, they will be 1 1/2 hours long, with a 1/2 hour
overlap. This applies to all FAI events flown both Saturday and Sunday.
A revised flyer will be sent. Hopefully, this will allow participation in
both the FAI and AMA events. Early motel reservations are suggested.
Anybody wanting a revised flyer, please contact me at This email address is being protected from spambots. You need JavaScript enabled to view it.
Thanks!
Bill
rolled booms
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Author : This email address is being protected from spambots. You need JavaScript enabled to view it.
thats real tough stuff! a science from years ago. let Ken oliver roll your
booms. its 2001, right? charlie
Sympo 2001
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Author : This email address is being protected from spambots. You need JavaScript enabled to view it.
Roger,
Please post this teaser list of 2001 NFFS Sympo authors and articles on the
next SEN. I think it will be a good book!
Thank you,
Ross Jahnke
Author Working title
-
Andresen, Hermann Tubulators
Annis, Jeff Finite Element Torsional Stiffness and Buckling
Analysis of Large Dawn Unlimited Rubber Model
Truss Fuselages
Aronstein, Jesse The Model Club and the Science Olympiad
Buxton, Jim F1N (IHLG) as Part of the Indoor World Champs
Events
Groth, Charles Design Theory for Electric A & B Models
Hinson, Rex Jigs & Fixtures: Don’t Build Without Them
Joyner, Loius The Impact of Technology on Free Flight
Kaynes, Ian Model Performance Calculation
King, Peter More on Flight Simulation and The Thirty Gram
Wakefield
McCoy, Tom Contemporary Building Techniques for SAM Models
Morris, Gil Solutions to an Erratic Vertical Climb
O'Dwyer, John Small, Medium, or Large? Which is the Best P-30
for You?
Perkins, Robert The NFFS National Cup
Rees, Dave How to Use Electric Power Systems in Free
Flight Scale
Roussel, Lewis The Zen of Free Flight
Schlosberg, Aram Building a Twisted D-Box
Tenny, Bud Swing Arm Propeller & Rubber Tester
Wilder, Bob Indoor Models Powered by D/C Motors
Woodhouse, Mike The F/F Cottage Industry and My Part in It
Ten Models of the Year
NFFS Hall of Fame
Science Olympiad S. Cal state competition results
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Sandy Peck with help from Vera Dudley of Peck Polymers along with 7 Thermal
Thumbers ran the Southern California Science Olympiad "Wright Stuff"
competition last weekend (April 21st) . This was just one event out of 20 or
so in the SO competition. Troy High School team scored enough points in
enough events to outpoint everybody else and will go to the SO nationals in
about a month. I don't know who won the Middle School competition.
The airplane event had 2 classes. One for HS and the other for Middle
Schools. Rules for both events are the same except that HS airplanes must ROG
and get 10 "bonus" point for landing right side up. Each school team consists
of 1 or 2 students with 1 or 2 airplanes. The teams get to make 2 flights,
best one counts. Flights must be completed within about 10 minutes of first
launch
The airplanes are essentially penny planes with 10 gram airframes, 20 cm dia.
plastic props and no more than 2 grams of rubber. This is the fourth year of
the competition and the designs are converging on the classic Penny Plane
shape mixed with a few Guillows ARFs. As you can guess the ARFs don't win,
but the scoring is such that a team can collect a few points for
participating and an ARF is an easy way to participate.
In the High School division 26 schools entered teams and 22 flew in the
Wright Stuff event. Most teams made both flight attempts. That's somewhere
between 35 and 40 flights logged for high school teams. Middle school
division also had 26 teams entered and 23 of them flew in the Wright Stuff
event. Another 44 fligths.A total of more than 80 flights logged between 9 AM
and 2 PM closing time. That's a lot of traffic even taking account of a 1
hour closing time extension granted to catch up on stragglers.
First 5 places in HS division were over two minutes and only 5 flights logged
were under ten seconds.
1st University City 165sec plus 10 landing points
2nd Troy 159 sec plus 10 landing points
3rd Valencia 135.5 sec plus 10 landing points
4th Torrey Pines 127 sec plus 10 landing points
5th Mount Carmel 123.9 sec plus 10 landing points
It's not clear to me what good the landing points are, since everybody makes
greased on wheel landings. The wheel landing are a problem for the timers who
have trouble telling when a model actually touches down. And times are
supposed to be read to 0.1 seconds!
Middle School Division had 3 flights over two minutes and only 6 flights
under ten seconds.
1st Joe Walker 141 sec no landing bonus for MS event
2nd Jacobsen 134.2 sec
3rd McAuliffe 133 sec
4th El Rancho 116.8 sec
5th Black Mountain 115 sec
6th Muirlands 112.7 sec
Notice how close the times were for 2nd and 3rd and again for 4th through
6th. At least the timers can tell when a MS airplane touches down because the
props hits and makes the airplane jump.
Obviously a lot of students are getting good at indoor free flight. It
bothers me is that I almost never see a Science Olympiad student at any of
our normal flying sessions.
Since SO is clearly a great free flight recruiting tool, we must be doing
something wrong or we would see more of the recruits. Why aren't we
generating much interest in the usual ff model activities here in Los Angeles
and Orange counties? San Diego County does better, but not all that much. Are
the flying sites too far? (I think so.) Don't the students horizons extend
beyond SO competition? Don't they like our company? (Could be. Most of us are
much too old to look like peers.) Are we so low profile that they can't find
us?
If you've got a fix, speak up.
good flying in new company
Dick Baxter
Rocky Mountain Regionals, Colorado.
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Just a short note for those inguiring.
WOW! Flying Fun!
Denver's contest/gala flying event will be over three days, August 10,
11 & 12.(Fri Sat Sun) This is a co-contest run by SAM 1 and the MMM
(Magnificent Mountain Men) It combines the Grosheider Memorial and the
Rocky Mountain Champs. Final details are being worked out between the
contest directors and club officials. Bill Lovins is coordinating
possible housing to help out visitors.
This is an ambitious undertaking and we want it to be an enjoyable
event for everyone. After snide comments appearing on FFML about the
prickly cactus I am contacting prison officials with the idea of
offering clemency for death row inmates if they will spend an
afternoon creeping along on hands and knees policing the area. But if
that falls through be sure to have proper shoes and watch out when you
kneel down. Get anti-puncture-proofing slime-gunk to put in your
scooter tires. It works. Forget about mountain bikes. Despite the
jokes it is a beautiful area and we love it. But it ain't no illinois
grass pasture, for sure!
Will get back to you all on this.
Thanks. Bill G. aka skygandist
FAI Results from Eastern Free Flight Championships
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F1B - Nine contestants
Place Name AMA# Time/Score
1 Taylor Gunder(JR)465993 1240
2 Richard Wood 43798 1220
3 Fred Bloom 50284 1192
4 Jerry McGlasham MAAC960 1190
5 Tom Ioeger 94350 1171
6 Roger Morrell 100063 1164
7 John Barron(SR) 343879 887
8 Dave Lacey 25895 810
9 John Clapp 19400 180
F1C - Two Contestants
1 Andrei Kirilenko 565641 1140
2 Robert Gutai 8008 0
A1 Towline - Six Contestants
1. Ed Pelatowski 542
2 Charlie Coeyman 526
3 Larry Pelatowski 479
4 Vince Groghan 446
5 Vic Nippert 406
6 Jean Pailet 396
Sunday, 4/22/01
F1A - Seven Contestants
1. Andrew Barron 14095 1181
2 Omar Erguner 538104 1134
3 Peter Barron(JR) 464925 1085
4 John Barron(SR) 343879 879
5 Kevork Fags 596 859
6 Tzvetan Tzvetko 547481 803
7. Adam Higgs(JR) 335
F1G - Eight Contestants
1 Richard Wood 600
2 Bob Hatscheck 591
3 Roger Morrell 567
4 Larry Pelatowski 517
5 John Clapp 487
6 Fred Bloom 412
7. Ed Pelatowski 350
8 Phil Puzick 127
F1J - Five Contestants
1 Austin Gunder(SR) 600
2 Jean Pailet 580
3 Dave Rounsaville 480
4 Tom Kerr 40
5 Adam Higgs(JR) DNF
Walleen and Wing Twist
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During online acceleration of an F1A, the wing twists leading edge down as
the line tension increases, limiting the tension. Adding more up elevator
increases the wing angle of attack which increases the line tension but at
the same time, causes the wing to twist nose down, thus blunting the desired
effect.
The main cause of the twisting is that the center of lift of the wing is
behind the elastic axis, a point in the wing chord where an increase in lift
does not change the angle of attack. All cambered airfoils have this nose
down tendency, roughly related to the slope of the mean camber line at the
trailing edge.
F1C ships show this characteristic during the climb. F1B does, but the
speed change is so quickly diminished that it is hard to tell. There is a
good friend in Columbus, Ohio, Gil Morris who found a way to counter the
twisting problem on powered ships. He fastened a small wire to the wing tips
where the wire was slightly bent aft, perhaps 30 degrees. On the tip of the
wires he glued a firm piece of paper,face to the wind, with perhaps a
dimension of 12 mm square. The idea being that the drag of the paper would
produce a nose up tendency to counter the wing twist during the climb. His
model was an F1J. From tests he determined that no paper was necessary for
this wing. He did take a lot of kidding from his local friends.
On all wings there is a line from root to tip about which the wing twists.
It is called the elastic axis and is thoroughly analyzed in full scale
aviation. On the F1 ships with the D-Box and the trailing edge virtually
held in place with the ribs, it is quite certain that the elastic axis is
within the D-Box. Now, if there were an aileron like affair near each tip,
it possibly could counter the twisting tendency. Of course the aileron would
have to be supported structurally and actuated by electronics or mechanics.
There is possibly another solution. Simply put, sweep the wings forward.
This puts the center of lift of each wing panel farther forward relative to
the root chord thus producing a nose-up tendency to counter the camber effect.
Bill Bogart
Tan II ratings
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Hardy Brodersen asked about some batches of Tan II rubber:
"Which has the most horsepower, and otherwise has no bad features,
( explosive, as Bob White once characterized some rubber he sent me for =
indoor use )?"
10/97
2/98
2/00
Hardy, based on a report that ran in the indoor column of the February,
2000, issue of the MAAC newsletter, and was reprinted on the Free Flight
Mailing List last year
sometime:
Batch Energy in ft.lb/lb
May 99 4675
Feb. 99 4582
Oct. 97 4513
Feb. 98 4485
July 98 4390
May 98 4325
March 99 4198
I have no record of who did these tests, and I share them for what they're
worth. But if they are to be believed, it looks like at least two of your
three are fine.
Bob Clemens
Rochester, NY
Getting a molded balsa boom straight.
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Author : This email address is being protected from spambots. You need JavaScript enabled to view it.
I mold the boom before cementing the joint. My boom form is longer than
necessary for the boom being molded. When I glue the seam I use the form as
a clamp to hold the boom to a flat workbench. The form is pulled toward the
front of the molded boom so that it (the form) is undersized. Using light
pressure I clamp both ends of the form to the workbench with the molded boom
around it. The boom is upside down and the seam edges are both up.
Starting in the middle of the seam I CA about an inch or two at a time
working alternately in both directions.
For Coupes I cover the finished boom with tissue. For Wakes I have had very
good results with Polyspan.
Jim O'Reilly
Balsa Bugs / Aeronuts
=====================
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Hey Hardy,
In case your memory is cloudy, the first Pennyplane contests were held by
the Chicago Aeronuts. It's true that Erv Rodemsky was the promoter and maybe
even remained a Balsa Bug member as well as an Aeronut after moving to
Chicago, but my recollection of Erv's presentation to the Nuts was that the
BBs wern't interested in promoting such an aberration from pure Indoor
models. He probably did make the first PP when he was a BB. I remember him
bringing it to our meeting show-and-tell, it had a carved prop! Erv and I
spent many a Sunday pm in the Forestview HS gym, he flew the PP and I was
just learning how to build Indoor with a lot of help form him. By the time
of the first PP contest, I had learned enough to beat Erv, Charlie Sotich
and also Jim Richmond! We flew under 'no-touch' rules and I had a leg up
because I spent a lot of practice time learning how to select the best motor
and wind it so the model leveled off just under the lights at 24' and landed
with 5:40 on the clock. Everyone else was killed by bumping the lights or
the beams. The write up was in AAM as the intro to a "new" Indoor event
sponsored by the Chicago Aeronuts, not the Detroit Balsa Bugs. My model was
described as "rather large" because it had a 5" wing chord, now standard for
LPP. The Aeronuts continued to promote the event locally and also as an
unofficial event at the Indoor portion of the Nats until it was accepted as
an official event by the AMA.
Chuck
.........................
Roger Morrell
