SCAT Electronic News 28 May 2001 issue 584
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- Category: Archive 2001
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SCAT Electronic News 28 May 2001 issue 584
Table of Contents
==================
SCAT Summer Madness Change of Date - Diez
Nelson Plug Threads - Morris
CYANO DEBONDER - Hines
April Tan II test result - Goldstein and Bakay
Editorial Rubber Comment
Wawayanda Results (FAI) (with slight correction) - Barron
Satellite 600 - Malkin
Too Young for Coupe
Steve Geraghty - Boutillier
Postal contests
SCAT Summer madness Change of Date
==================================
The SCAT Summer Madness has been moved from the Father's Day weekend
to the weekend after.
It will start on Saturday 23 June and finish on Sunday 24 June.
It is important to note that this is NOT a World Cup Contest and
is NOT and America's Cup contest either - but a Fun FAI event.
Full details will be published later but to make it a fun contest
and avoid the heat of the day it will be flown Saturday
evening and Sunday morning.
Nelson Plug Threads
===================
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Regarding Bob Mattes' observation, I had the same problem screwing-in, so
to speak, a Nelson plug just this past week-end. First time it's happened
to me. On inspection, this plug has interference at the top end of the
thread where it is distorted, just as in Mattes' case.
But where do you get a 11/32 X 32 die? It measures to be that size, but I
can't find it on any thread size charts.
Gil Morris
CYANO DEBONDER
==============
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I had the same query & Stan Buddenbohm had the answer.
KWIK DE-BONDER, by Global Hobby Distributors of
Fountain Valley, CA, 92708.
It is in yellow-labeled, 2 oz plastic bottle &
cost $4.27 @ JAX HOBBY, on Brookhurst in Fountain Valley.
It is Nitromethane based.
Lee
April Tan II test result
========================
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I sent a sample of the April 2001 rubber that I received to Carl Bakay (new
INAV editor and former polymer chemist) for some testing. The specific
rubber is the identical mass per length as the May 99 rubber I have and is
from the bottom 1/2 of a 10 lbs box.
---Carl's E-mail-----
Got your April 2001 Tan II yesterday. Thank you for 34 generous feet! I
immediately stretch tested it last night and did a re-test this morning.
Very interesting stuff. Half the loops broke on the first stretch test at
75% or less max pull, which for 1 loop is 8 pounds or so. The half that
survived gave good energy results. None of the surviving loops failed on the
second test. Breakage was not in the knot, although one loop failed in my
hands while I was tying the knot! Spreadsheets are attached.
I would conclude that for single loops where you can test for failure ahead
of time, as in indoor, April 2001 would be OK. But for a Gollywock or
Wakefield with multi-stranded motors, I think it would be a disaster. My
limited experience showed failures ever other 7" loop, or every 28" of
strip.
----End Carl's Email----
So, the plot thickens and seems to be indicating that you have to test
individual motors or just plain expect to blow a lot of motors.
Tim
[Denver, CO]
Additional Tan II April 2001 info
================================
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I forgot to include the energy figure Carl got on the loops that did not
break.
energy value of 4330 ft-lbs/lb at 70 degrees.
Tim
[Denver, CO]
Editorial Rubber Comment
========================
- I was not sure if I should publish the above mail
although it does describe the results on tests on April rubber, it does
include some subjective comments that may give a false impression.
Let me give some more information. The rubber comes from the factory
to FAI Model supply in 10 to 14 pound boxes. The rubber is one long strip
with several splices. The characteristics of the rubber will
change across splices. Sometimes there is very little differrence between
the different sections and sometimes it is a much bigger difference.
The splices are marked with a black mark.
It is not advisable to have a splice in a motor because it will break.
They must be found when making motors and re-tied.
Sometimes the rubber has flaws or kinks. The rubber will break on these
if wound hard. If you suspect that the rubber has this, you can often detect
them by pulling the rubber through your fingers. Occasionally there
is a bad patch with many flaws.
Most serious F1B flyers test every motor. This is because we understand
more about rubber than we did years ago and the rubber is more
readily available [well most times !] so we wind the rubber to the limit
to get the top performance and do not worry if the motor cannot
be used again. To do this you need to test each motor so you can know
how many turns. If you are a really top flyer you can estimate this by
the length the motor stretches to before winding and how it feels,
but I can't do that.
Looking at the April rubber, there are some sections where there are more
than normal flaws, these can be detected by inspection or by stretching
the made up motors. There are some sections of the box where the
rubber is better in terms of energy return and has no flaws at all.
It appears that the rubber that was first given to FAI Model supply and
sent for testing was like this. I flew with one of these test motors
and it went very well. When I got my 10 pound box I found some rubber
was the same, or very close to that and some was not as good.
That's how it is.
Although I'm not one of the people who
'offically' tests the rubber for FAI Model Supply, I do know some
of them personally. We have had comments that 'you guys have the
inside scoop so you get the best rubber' - for that reason I
publish some comments that come from these people. These remarks are
made in good faith, but as you can see no one really knows how the rubber
suits them until they get their own rubber in their hands. This is
how it has always been and because of the economics of making rubber
for a small market it is unlikely to change. Knowing if a
particular 'Month" is good rubber is really only the starting point
it is necessary to carefully select the rubber within that for
very important events.
As a further comment of the April rubber I did fly in F1G this last
Saturday with that rubber. I used motors that were made up from
April rubber from the not so good section of the box. This rubber had
already been flown once in a F1B and I broke some strands so found
the good bits and made coupe motors. The rubber went very well until the
temperature reached 100 F then the person I was flying with [also on
new April rubber] started to break motors. To solve this I draped
my motor tube with a wet towel to cool it down and continued
flying. ... I did not do well in the contest [flew too late and dropped
one round ] because I'm not
old enough, see story below, but that is something different !]
Wawayanda Results (FAI) (with slight correction)
================================================
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Here are the FAI results for the Skyscraper International Challenge.
The conditions were great. Winds moderate (0-10 MPH from the South
and West on Saturday and from the East on Sunday). No models were
lost, though the Gunders put their F1J in the top of a tree at the
edge of the field when they won the Champagne flyoff with a 6 minute
18 second flight. We were delighted to have Brian Van Nest come
from California, Dick Wood from Arizona, Chuck Markos (16 hour drive
from Chicago) by way of Paul Crowley (10 hour drive from Michigan),
Gil Morris from Ohio, and Jerry McGlashan (7 hours from Canada) as
well as a number of fliers from the NorthEast.
-- Andrew Barron (FAI CD).
F1A (Glider)
1 Omer Erguner 210 180 180 158 180 180 180 1268
2 Chuck Markos 210 180 180 180 49 180 180 1159
3 Brian Van Nest 210 180 180 180 121 88 180 1139
4 Tsvetan Tzvetkov 210 148 97 121 180 180 180 1116
5 John Barron (J) 210 180 180 180 101 180 78 1109
6 Andrew Barron 210 77 180 180 180 180 47 1054
7 Peter Barron (J) 210 92 83 180 97 180 180 1022
8 Aram Schlosberg 210 180 111 102 154 74 180 1011
9 Art Ellis 208 180 180 23 591
10 Kevork Fags 210 210
F1B (Wakefield)
1 Paul Crowley 210 180 180 180 180 180 180 1290
2 Ron Felix 210 139 180 180 180 172 180 1241
3 Vic Nippert 210 149 180 180 180 145 180 1224
4 John Clapp 119 180 180 180 180 180 180 1199
5 Jerry McGlashan 210 180 164 180 137 138 170 1179
6 Taylor Gunder (J) 112 180 180 180 180 180 15 1027
7 John Barron (J) 0 57 180 180 157 180 180 925
8 Dick Wood 158 121 180 180 180 147 38 904
9 Dave Lacey 88 78 133 116 99 55 64 633
F1C (Power)
1 Gil Morris 180 180 180 180 180 180 180 +281 1541
2 Andre Kirilenko 180 180 180 180 180 180 180 +228 1488
3 Bob Gutai 180 180 43 403
F1G (Coupe d'Hiver)
1 Dick Ivers 117 120 120 84 120 561
2 Vic Nippert 120 75 120 120 120 550
3 Dick Wood 120 120 77 100 120 537
4 John Clapp 120 80 120 120 61 501
5 Bob Hatscheck 0 120 120 120 120 480
6 Paul Crowley 120 120 71 311
7 Art Phillips 120 55 175
8 Bill Buss 120 120
F1H (Small Glider)
1 Vic Nippert 120 120 106 120 120 586
2 Chuck Markos 97 120 96 120 120 553
3 Brian Van Nest 100 85 120 120 120 547
4 Josh Revkin (J) 82 120 120 69 67 458
5 Larry Pelatowski 95 106 108 55 76 440
6 Jean Pailet 85 84 120 53 35 376
7 Ed Pelatowski 69 120 53 54 68 364
F1J (Small Power)
1 Bob Gutai 120 120 120 120 120 +147 747
2 Austin Gunder (J) 120 120 120 120 120 +92 692
3 Gil Morris 120 120 120 95 120 575
4 Jean Pailet 120 120 100 98 120 558
Satellite 600
=============
Author : This email address is being protected from spambots. You need JavaScript enabled to view it.
If Ian Neillands looks in the January 1959 issue of MAN ( that was in the
days when F/F got good coverage in MAN) he will find the plan and article
he requires. If he is unable to locate it I can send a copy of the article
over for him.
John.
Too Young for Coupe
===================
Looking at recent California America's Cup coupe results I am somewhat
encouraged. The last two contests were won by Hank Cole. Hank was
flying his 'new' model that he has been developing for the past 3 years.
We just found out that in August of this year Hank will celebrate his 80th
birthday. Similar performances have been acheived by the younger Bob White.
I realize now that I can attribute my lack of sucess in this class to my
lack of experience and comparative youth. It is a little disheartening to
come to the understanding that I have well over 20 years to go before
I can get to master status in the difficult event. Looking at the
postive side I'm not over the hill.
Steve Geraghty
==============
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I met Steve very seldom in my life, but I will remember him forever.
In 81 W.C. in Burgos, I was team manager and our team was very well
at the beginning of the last F1B round. At the end of the last winning
flight (1st by team), Steve came to me with a large smile, offering a fresh
can of beer and saying:
Bernard, drink this beer, you will remember it all your life.
20 years after I remember this fine guy, for sure I will never forget him.
Please forward all my sadness to his family.
Bernard Boutillier
Postal contests
===============
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Following is an update on various 2001 Postal contests:- Note that the
'Lulu' glider event is already up and running and the 'Embryo', 'Delta Dart'
and 'Worldwide Postal' competitions commence on June 1st.
1. Lulu International Glider Competition (also includes 'Lulu Baby')
May 1st. 2001 to September 30th. Run from UK.
2. Embryo Endurance Postal Contest June 1st to July 31st
3. Delta Dart Postal. June 1st to November 30th.
Indoor/Outdoor classes, run ex S. Africa
www.geocities.com/rufusmi_za/freeflight.html
4. 10th Worldwide Postal Competition June 1st to February 17 2002
Rubber: 1933 Lanzo (one design event)
20" Rubber -any published design up to 20"
30" OT/Vintage - pre-'51 designs 20+ to 30"
42" OT/Vintage - pre-'51 designs 30+ to 42"
P30
Embryo Endurance
Cloud Tramp (one design event)
Dime Scale
Gas: TD Power - any model with TD, or older engine, to
maximum .051 cu.in., Slow/Classic Power (no autos)
Open Slow/Classic Gas - up to .21 cu.ins (no autos)
1.5cc Diesel Slow/Classic (no autos)
Stomper (one design event) up to 1.5cc diesel
Glider OT/Vintage - pre-'51 designs up to 50" span
Classic Glider - pre-61 designs, any.
Small Catapult - designs up to 12" span
Large Catapult - above 12" span
HLG - any
5. Delta Dart Mass Launch July 29th.
6. Cloud Tramp Worldwide Mass Launch - August 11th
7. Cloud Tramp Postal Contest - August 11th to September 30th.
Information and details on any of these events available from
Jim Moseley This email address is being protected from spambots. You need JavaScript enabled to view it.
...................
Roger Morrell
