SEN-416 May 11 2000
- Category: Archive 2000
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News and Reports 2000 - First half
SCAT Electronic news 11 May 2000 issue 416
Table of Contents
Parker F1As for Sale - Parker
Hector's Midsummer madness
F1D regional - Robbins
Yuri Counts - Woodhouse
Weights and measures - Markos
GPS - Andresen
Thanks.... - Kowal and Dave
FOR SALE: F1A BUNTER, VICTOR STAMOV ENTRY LEVEL - Kruse
New e-timers page - Manor
Return of the Oppegard Rubber Stripper - Gelhar
Parker F1As for Sale
I have the following F1A's for sale. Please post in SEN.
#26, 1st generation electronic bunter. Basic Stamp processor with Bauer
software. Two extra batteries included. JR ballbearing Servo. C.F. / F.G.
wood pod fuselage with C.F. boom, just refurbished. M&K tow hook, custom
wing wiggler. Under slung rudder. 3rd generation kevlar wrapped C.F. spar
and C.F. D-box, C.F. TE's. Two 5.0 mm wires. MicaFilm with tissue on D-box.
Span 88 inches. 64 sq in stab with new =BC mil mylar covering. Overall
condition excellent with faded tissue on wing D-box the only part that does
not look new. $650
386 SamSung lap top computer for programming Basic Stamp timer. Comes with
programming cable and 120v power supply. Internal battery good for ~45 min
continuos use. $150
******************* #26 and Lap Top combo deal, $700**********************
#27, Zoom model. Bauer single function DT timer. Custom Parker tow hook with
M&K wing wiggler released at hook unlatch. Wood pod fuselage, C.F boom with
under slung rudder. Wing has kevlar wrapped C.F. spar with kevlar D-box,
Mica film covering in good condition (still bright red and white). 87 inch
span. One 5.0 mm + one 4.0 mm wing wires. 65 sq in stab with =BC VDA mylar in
good condition., extra spar stab also included. $500
#24, Zoom model. Bauer single function DT timer. Custom Parker tow hook.
Wood pod fuselage, C.F boom with under slung rudder. Wing has kevlar wrapped
C.F. spar with kevlar D-box. Balsa with C.F. T.E.'s. 91 inch span. One 5.0
mm wing wire. Several repairs and faded covering. Glides right. 63 sq in
stab with =BC VDA Mylar , several tear and puncture repairs. This model won
the largest USA contest, 1993 Livotto's! $350.
*************** Buy two models and get one old beat up foam / F.G. F1A box
These are the last of my left-hand gliding models. Dallas flew models #27 and
#24 to the highest AmCup Jr in 1998. Dallas was to use #26 for the 2000 Czech
Jr WC but the left-hand bunt / glide was too confusing.
I'd be willing to demonstrate these models at any of the Lost Hills contests.
Thermals, Jim Parker
Hector's Midsummer madness
The now traditional summer FAI contest CD'd by Hector Diez
will be held at Lost Hills on 17 and 18 of June. ...Before
you note and/or complain that this is Father's Day, Hector
comments that what can be a better thing for father than to spend it at
field flying in this relaxed event. A true Hallmark (R) moment.
August 19-20 2000 , Moffett Hangar #1, Mountain View, California
Category IV indoor site
Kids contest and all indoor categories of Freeflight
Sunday the 20th: F1D regional team selecton contest
Base entry requires being on a Name list:
Yuri is the process of making an electronic counter for the winder. He
has promised that he would let me have some for sale as soon as
production is sorted.
Michael J Woodhouse
Weights and measures
Now that the contest season in the non-California/Arizona/Florida USA is
about to be underway, I feel compelled to make some comments about the way
I've seen model processing done at some contests. One problem is that
balances (as we in the know call what the rest of the world calls scales) in
use may not have the precision to accomplish the purpose to which they are
intended. For example, an electronic balance with a precision of one gram
should not be used to measure weights of rubber motors...especially F1G
motors. The one-gram precision brings into question at which load the
display changes from 10 grams (legal) to 11 grams (illegal). We can
probably assume that a load of 10.5 grams will not change the display,
therefore it would be to the advantage of an F1G competitor to make two sets
of motors, one set a 9.5 grams for occasions where good weighing techniques
are used and another at 10.5 grams for those occasions where poor techniques
are used...a 10% difference! A second consideration in weighing is what we
call an operability check. For a balance, that would be to check the
observed reading using a standard weight. To that end, I have made 10-gram
weights, 410 gram weights and 5000 grams weights to test my own balances at
home. Most of the time I bring them to contests and offer them to those in
charge of processing models and towlines. For example, for towlines I use a
spring scale (scale is the correct word here) that has 1-kg graduations up
to 5-kg. When I hang the 5-kg weight on the scale's hook, the reading is
reasonabley close to the 5-kg mark. The graduations are about 1/2-inch
apart. If the devise in use at the contest is grossly out of agreement with
mine, then I know something is wrong. Such a situation occurred at the last
Team Selection Finals in Palm Bay and the "official" apparatus had to be
hastily modified after quite a bit of problem solving to make it work
correctly. My home-made spring scale has more precision than most of the
fisherman's spring scales I've seen used at contests, mostly because of the
distance between graduations. You just cannot discern between 4.5 kg and 5
kg when the difference between those marks are 1/16-inch or less.
For towline length, I have a 100-ft steel tape measure. We who fly towline
gliders know that some materials have much more stretch than others. To use
a plastic or fabric tape to set the 50-meter length is just not appropriate.
Since it is the practice of most towline glider flyers to use every
centimeter of length allowed, the greatest practically obtainable precision
is called for in setting the 50-meter standard. Those who push the limit
are subject to a severe penalty if their line changes during the course of
the contest and becomes a few cm longer at the end of the day than it was at
the beginning, especially where lines are not impounded. There may be flaw
in the rules: To my knowledge, nothing is said about processed legal lines
in impound becoming illegal through use leading to the disqualification of
Getting back to weighing. The best apparatus is a go/no-go balance using a
standard weight. It is simple and non-controversial. It doesn't provide a
lot of information to the contestant about how far away the model or motor
is from the specification, be it under or over. And I like that. It
shouldn't be the CD's or chief processor's duty to tell the contestant how
much he has to change to be in spec, especially when there is a long line of
other contestants waiting.
I hope this little note has been instructive. I'm sure there are others
out there with backgrounds similar to mine who might be in agreement with
some of what I've said. For those who don't know, my professional
backgroud is in chemistry. Precise weighings are an integral part of my
Don't know if this made it thru ISP as computer hung up.
If duplicate, ignore.
You may want to ignore anyhow.
Is refreshing to read about ribs etc since rule changes won't be a subject
for 4 years.
Feel a lot less secure now that GPS lacks the intentional error. With the
1000's of nukes on the black market it was comforting to know that they
might have missed their targets by a few feet until they removed the GPS
The onboard GPS used for timing is intriguing. What are chances someone
would get clocked off early as their model headed upwind & had zero ground
Also becomes advantageous to tumble on the ground after landing. Think of
how much time you could get with runners for Holiday on Ice.
Keep up the good work,
Just thought I would share the note I got back from Dave after his
science olympics competetion. Sounds as though he had a good
time! Maybe a chance for some new flyers from this source. As I said
in a previous E-mail the first site I was directed to on a search for
info was yours.....Anyway it was fun E-mailing back and forth with
David and encourage all of you to take any chance you get to
do the same.
---------------------- Forwarded by Ken Kowal/TCANOTES on 05/10/2000 06:54
David Silvestro on 05/09/2000 04:54:45 PM
I would just like to thank you again for the time you put into helping
me with my project. I thought I would just fill you in on what
happened. I did not place in the top 6 out of 14, but i was able to
build some nice planes. One of the main problems was the elastic. The
two we had broke and we could only tie them together. We could only
wind them so they could turn for max 30 sec. There were some there that
would spin the propeller for a good 2 min. If we had a thinner elastic
it did not provide enough thrust to lift the plane off the ground.
Another problem was the time. We were not able to test the planes we
Many of the planes flown in the competition were built from kits. Out
of the 14 or so planes, there were about 3 or 4 that were built from
scratch including mine. I dont think its much of an event if people
can just go buy a kit and piece it together, but thats just my opinion.
Our plane flew for 8 seconds and landed on the gear giving us 10 more.
We were happy with the result concidering all the work we put into it.
I have also learned much about model planes, and cant wait to try again.
Thank you again,
[Ken and Dave ... and others .. Why not publish and edited version
of the e-mail 'conversation' you had so that others may profit from
the information exchanges?]
FOR SALE: F1A BUNTER, VICTOR STAMOV ENTRY LEVEL
From: Matthew Kruse
This glider was purchased brand new from Victor Stamov at a contest at
Lost Hills, California.
Victor personally helped me make 4 test flights and helped with some
minor trim adjustments
the day I bought it.
The glider is in perfect condition and has been stored safely in a box
The model Flies very well.
I am selling this glider as new for the original purchase price of $600
plus shipping if
necessary. ( US ).
It is in exactly the same condition as when purchased and includes the
timer winding wrench
and the bunt delay-set pointer.
There are no holes, tears, or broken parts.
Please do not hesitate to call Matthew Kruse at 714-279-9384 or email me
you are interested in purchasing this model.
New e-timers page
I put up a new e-timers page with info about brands, field expeirence =
The page is changing as I get responds from manufacturers and other =
ANY comment will be welcomed.
have a look http://www.ee.bgu.ac.il/~manora/e-timers.htm
Beer Sheva Aeroclub
Return of the Oppegard Rubber Stripper
I am pleased to announce the return of the Oppegard rubber stripper. Mr.
Oppegard has recently passed away, however, a family member is resuming
production of these fine tools. A new web site has been started.