this column is just packed with good information for control liners!
In fact, most of Bill Netzeband's monthly column in American Modeler
were packed with reports and tips. Look in the "Engine Size vs.
Lines" section of this 1963 edition for a handy guide to what control
line diameter and length to use for a given range of engine sizes.
He mentions the use of integral calculus to calculate control line
drag coefficients for creating a nomograph - heavyweight talk you
won't find in today's magazines! There is also a really funny comic
that control-liners will appreciate.
Wild Bill Netzeband's Control
Hoo boy, what a life. We now have a dilemma. Since
we now reside in Buffalo, N.Y., can we still use "Wild Bill" as
a pseudonym? This repo't is from a motel overlooking the Flying
Bisons, Inc. R/C field. Stepped from car to be greeted by the homey
sound of a 45 winding on. Hain't found any U/C people yet, but then
with no models and no shop, who keers? Drug along some letters and
such, so this here coloom will be a bit of a hodge-podge.
Bonnie Jones, Virginia State winner in Miss Universe beauty
contest, poses with Walt's newest, design.
Ever pilot a combat model that could cut its own streamer? Walter
Williamson's "Flying Flounder" has turned two complete loops
within its own streamer length!
Stopped by Top-Flite Models on the way up here so the kid's Atlas
nose cones are now flying about the room. Sid and Mike showed us
thru their fine plant and we looked over their new Flite Streak
Trainer (15's to 29's). Due for imminent delivery, designed by George
Aldrich. These fellows go a long way to put out high quality merchandise.
Called Carl Goldberg but he was out flying. Talked to Paul Stawinago
awhile. He told me the Sky Knights with 25 active members were starting
Goodyear Racing. Look around, sport fans, these little ships are
catching on. Carl has some new stuff on the board and in test also
scheduled for July and later delivery.
Died A Violent Death. Headline from newspaper related
to a 19 year old boy who not only sniffed glue but used a plastic
freezer bag over his head to concentrate the fumes. Of course the
MODEL AIRPLANE glue was prominently mentioned. Not that we don't
have enough trouble with noise and short-sighted city fathers, people
now use our equipment to commit suicide. Of course, the newspaper
could have called it "Household" glue . . . The point? Cement fumes
are toxic, but the tubes are marked with warnings. So who reads
directions? Cements of acetate base and those containing Toluol,
Toulene, Methyl-Ethyl-Ketone or Butyl Acetate can damage the liver,
lungs, frontal lobe of the brain and the bone marrow where blood
cells are formed. Sure it takes a lot of fumes, but it seems that
the effect is cumulative (adds up).
Solution - don't
work in a closet or tightly sealed area. Keep room well ventilated,
meaning open windows and some movement of air. Use horse-sense.
Keep in mind that automobiles, toothbrushes, soft drinks, pencils
and marshmallows are dangerous if used improperly. We heard of an
old Chinese gentleman who drowned in a cup of tea (had a fainting
spell and inhaled the tea while unconscious).
2: Our chemicals are no more dangerous, per se, than dozens of household
items, so long as we use them sensibly. Meanwhile, send your local
newspaper some good news about model airplanes.
Oops. Frantic note from John Kilsdonk about
the Detroit Combat Invitational Trophies. They are worth $50 Total,
not each as reported here. Sorry, John: Cancel those cattle boat
reservations. Still a lot of sharp combat flying on July 7.
Pylon Fuel Bulb. Latest addition to an excellent
line is this big 6-oz Pylon Brand fuel bulb with several innovations
toward rapid fueling of T/R & R/R models. It uses a 3/16" O.D.
tube with a hemispherical cavity nylon end which mateswith a ball
end fitting to go on your tank fill tube. You can hit the tank from
any angle up to 30· and still get full flow. Included are a special
wire to fix the rubber bulb to the molded nylon cap for filling
pressure tanks, a large 1.0. rubber tube, and two eyelets for preparing
the ends of 3/16" O.D. tank fillers.
The bulb holds
exactly 6-oz of fuel IF you hold the tube straight up after filling,
squeeze out remaining air and then suck in more fuel. On one plunge
fills it pulls in from 4½ to 5-oz of fuel.
"Little Outlaw". Finished model by L. H.
Hoff was given a 20 flight wringing out in high wind and one or
two in calm. It is an excellent handling job with extremely tight
cornering ability, due to correct control arms, thick (20%) wing
and 26 ounce weight. Powered by a Stunt Fox 35 it is fast (around
65) on 10x6 prop. Even when we richened her out to a slow-blubbering
run the Outlaw performed well. Had a real ball in 20 to 35-mph wind
after the engine quit. You can keep doing 8's and loops as long
as the breeze holds. Also noted extremely good tug under all conditions,
even when we moved the elevator to 45° and did some fully stalled
Hoff reported reasonably easy construction
although he finally nailed the wing down to dry. The fuselage can
be hollowed further without loss of strength and the construction
gives you a fuselage-solid ship with profile-ease. Kits should be
well into your shop by now. Price $7.95.
FAI T/R Times Going
Down. Two reliable sources report on a So. California T/R with
4th place time of 4:561 The rest? 4:45, 4:47 and 4:53. Seems all
of our active U.S. teams are getting better. Some of the Huntsville
gang are flying the event. Phil Edwards pointed out a peculiar fact:
In Europe relative performances for any set of teams from a given
country were very close to each other. Now we are doing it. Is communication,
practice or what the answer? Our equipment has not changed much
in 3 years, but the performance is better and better. Good shoe.
Roberts Throttles Still Available. Bob Smurthwaite
is now in Bend, Oregon, with North Pacific Products Co. He asks
us to announce that Harold Leopold has the J. Roberts equipment
and know-how to install Vari-Speed slides in your engine. Prices
should be the same and workmanship equal. As a matter of interest,
I've put over 200 hours on my first Vari-speed engine, a Fox 19,
and am still using the original Ohlsson Gold Seal' Throttle plug!
Scared to take it out, now.
Anyhoo, address Harold
Leopold, Valley Hobby Center, 216 "C" Street S.E., Auburn, Washington.
Out of our field a bit, but worthy of mention, North
Pacific will soon introduce a line of Beginners kits, a H/L glider,
an all balsa ROG, and a rubber powered Bipe. Actually, the beginner
is getting some skilled attention lately and more coming.
Engine Size VI Lines. Nick Hutak, Monmouth, N.J . asks about what
size lines to use. Contest flyers must refer to the rule book since
they are spelled out loudly and clearly. However, sport types, here
are some "safe" . . . both strength and performance . . . sizes.
Engine up to .051 cu. in. displacement use either commercially packaged
Dacron or nylon cord up to 30' long or .006-dia by 35' to 40' long.
From .051 thru .099 use .008-dia by 45' to 55' long. From .099 thru
.199 use either .010-dia by 60' or .012-dia by 52½'. From
.199 thru .45 use .015-dia by 60' to 65' long. Over .45 use .018-dia
by 60' to 70'.
These are all standard make lines either
stranded or solid, with stranded being easier to maintain during
average flying. These lines are neither too light nor too heavy
for the basic engine. We have found that line diameter and length
are basically a function of engine size. Also as a rule of thumb
each increment of diameter (approximately .002) is about equal
in drag and yaw angle effect to 10 feet of length. For instance
.012 by 52½' lines perform equally with . 010 by 60' on the
same ship. Questions anyone?
Nick also asked about
tank size for length of run. This is quite variable, although 3½
to 4-oz is adequate for 35 stunt ships.
Oh, yes, Sullivan
Products makes a real good line storage reel for a buck. Ask your
hobby shop man for it.
New Items Potpourri.
Bill's Miniature Engines will manufacture a right-angle FAI Monoline
handle. We saw a prototype of it when Tom Vincent and Bill Kim dropped
by Tulsa. Unit will be flex cable driven around the comer with a
tensioned spiral and ball thrust bearings throughout. Write Bill
McGraw at 1325 Carol Dr., Memphis 16, Tenn. Also note that World
Engines now has an 8x8 prop which is stiff enough for hand starting
on R/R engines, but light enough for extra revs. Bill has these.
Looked over the prototype kits for the Kansas "Duster" A. An FAI
speed ship or A, as you wish (just change fuel). Wood shaping is
excellent and complete. At the time, pans were still a problem,
but being ironed out. These ships will eventually be made for B&C.
Also at aforementioned address.
Received sample of
Tatone's new Aluminum Speed Pans, a B size. Now here's a buy and
a half. Not only are all 9 holes tapped, blind yet, the screws provided,
but the pan is mirror polished outside. Front is finished for standard
spinners with little or no trimming. Inside needs no work, either.
Frankly prices belie the quality. Address Tatone Products, 1275
Geneva Ave., San Francisco 24, Calif. Prices: ½A-$3.50; A$4.25;
8-$4.50; C-$4.95 and Proto-$4.95. Specify engine and displacement
when ordering or order an undrilled pan.
Speed Pans Available. You may or may not know that
Harter's Royal Line is no longer made. However, several hundred
speed pans including the die-cast mag proto-R/R pan are still available
from Schaefer's Hobby Shop, 5609 E. Virginia, St. Louis 11, Mo.
Art Schaefer says he has a good stock of each size. Priced to wit: ½A-$2.50;
A-$2.95; 8-$3.50; C-$3.95; Proto & R/R-$3.95. Also some of the
Harter Dural Proto landing gear with nut and bolt set for 79 cents.
Enclose 25¢ for handling and postage.
Old Tree Surgeon Finally Fell Out Of A Patient. FAI
Stunt Team selection reported in CLC earlier got shot down and is
officially superseded by an AMA Executive Council approved program.
By now, officially printed in MA, summary follows: Finals held in
Midwest Area (probably Chicago) in 1964 during Memorial Day weekend.
To get to finals you qualify by either of two methods. Win first
in a AAA Stunt contest with at least 5 contestants. Stipulation
- you pay special FAI Qualification fee - that is, the Stunt at
that meet must be declared an FAI Qualification contest.
OR - Place in top three at Semi-Finals of FAI Regional Contest.
To get to these you win 1, 2 or 3 in any sanctioned contest (Stunt
of course) IF you pay FAI fees prior to flying and submit proper
Fees, 3, 2 and 1 buck O-S-J respectively. Three Semi-Final
contests scheduled for Labor Day Weekend 1963 on West Coast, Mid-West
and East Coast. Top man in each Semi gets travel money to U.S. Finals.
Note: No one under 14 can compete in FAI events.
Program Directors are: East - Jean G. Pailet, 2514 Seventh St.,
East Meadow, N.Y. Central - Art Schaefer, 5609 E. Virginia, St.
Louis 11, Mo. West - Pending. East Region - District 1 thru 5; Central
Region - District 6 thru 9; West Region - District 10 & 11.
In case you're confused, the program we published 4 months
ago was the one submitted to AMA by the Stunt Committee and was
approved by most of the 20 flyers capable of FAI performance. THIS
final program is the OFFICIAL program approved by the AMA Executive
Council. Clear? Okay, so dry those tears.
Bob Gialdini. He revealed his trade secret on perfect
Plastic Balsa fillets . Build fillets in thin layers, since it shrinks
on drying. Mold the wet material with finger, but keep the finger
well-moistened with thinner or thin dope. Allow plenty of drying
time per layer. Then, after sanding to shape, rub on many coats
of C-77 cement. Boz sez every evening he slaps on one coat. Sure
it takes time, but any solvent-evaporation material must be thoroughly
dried and applied in thin discreet coats.
We got a look
at Bob's unpainted "Stinger". No mistake that this bird is an original.
Not really wild lines, but much great care to be different. He was
still trying to develop a color scheme to accentuate the flowing
lines of the model.
Precision Acrobatics has come under fire as being boring, stagnant
etc. and etc. Nuts!!! It's may be boring for some who don't participate
because everything goes smoothly and precisely or smash. Stagnant,
never. Sure it's tough to win, but, no possible change in pattern
(short of ridiculous gyration) could knock the top men out of their
saddles. They are on top bcause they are good. And note
this: They weren't legislated up there! Any. combination of maneuvers,
within the capabilities of present equipment could be learned in
one week by any good flyer. Also, what other event has so many NEW
ships each year, without losing old standards? Where else do you
see such beautiful workmanship? So don't bother PA, you non-PA'ers.
Work on the events with obvious flaws.
Abound. The line rake discussion drew some extremely
well thought-out, engineering analyses along the same line, toward
the same result. First, Edward Fort developed the Integral Calculus
necessary to compute total line drag and provided a valid drag coefficient.
It's a complex equation, for which we intend to draw a nomograph.
An excellent piece of work.
Piper Mason sent results of
experimentally derived line to model drag ratios. Using a Dyna-Jet
model he changed lines, recording speed changes. A jet is ideal
for this work, since it develops the same dynamic thrust as static
thrust: He then established mathematically a drag coefficient. Ultimately
he determined a relative drag coefficient also establishing criteria
for model drag figures.
And Rex Powell, Huntsville, Ala.,
sent a properly organized engineering report on "Deflection of a
Flexible Line in Tension When Subjected to a Non-Uniform Loading".
The whole math development was there, ending in an exact equation
to calculate the angle of the control-lines as they leave the model.
He also had found a useful drag coefficient used in fluid dynamic
drag work. His result was a graph useful in relating model weight,
line diameter and line rake angle. Incidentally his work concurs
that velocity is not a factor in rake angle work.
is to correlate these three gentlemen's work with my own, eventually
developing a simple nomograph for line rake. Since each drag coefficient
by the three is inserted into different parameters, we don't present
the numbers per se. It is quite encouraging to find that people
are genuinely interested in the physics of CL models. Thanks, fellows.
Thought To Retain 60 Days: Anyone
who can remain calm in the midst of all this confusion, just don't
understand control line flying.
Right angle single-line handle
for F.A.1. speed flyers is made by Bill's Miniature Engines outfit.
"Apache" (below) is by Jim Van loo, Sioux City; K&B 45, 60.5·oz,
750 squares, 59.5" span.
L. H. Hoff with "little Outlaw"
built from Casburn kit; Wild Bill gives design & kit a good
rating. Pylon Brand's large fuel bulb with fast mating connections;
eyelets for 3/16" O.D. tank tubes.