 This is a very interesting article about
the
FCC's "Secrecy of Communications" rules. Manmade radio interference (QRM in
Ham lingo), has been a problem since the early days of wireless communications.
You might convincingly argue that it was worse at a time when many transmitters
were of the arc type that basically spewed out a mess of RF energy within a specified
bandwidth (very wide compared to today) to signal the presence of a "dit" (a digital
"1"), with the absence of a signal being a "dah" (digital "0"). Filter technology
for both the transmit and receive sides was also poor, allowing unintentional RF
noise to be sent over the air and to find its way into the detector circuits. The
Federal Communications Commission (FCC), first formed in 1934, nearly four decades
after Guglielmo Marconi first demonstrated his wireless set in 1896. Sometime around
1952, the FCC allocated a half dozen frequencies in the 27 MHz for radio control
(R/C) model use, mixed within the existing citizens band (CB) radio channels. As
you might imagine, interference problems were rampant, especially near metro areas
and highways with heavy truck traffic. This editorial in a 1969 issue of American
Aircraft Modeler magazine reports on just how bad things had gotten, especially
that caused by operators using faulty and/or illegally modified transmitters, and
even by malicious intentional attempts to "shoot down" model airplanes by keying
transmitters in the vicinity of flight activity. In 1965, the FCC allocated...
 Things were all so simple then; time has
rewritten every line - to paraphrase a popular song from the mid-1970's. That was
the era when this 1975 issue of American Aircraft Modeler magazine ran
the
Electric Flight Action column by Mitch Poling. Having just entered into the
radio control (R/C) phase of aeromodeling at the time, I was not too overly interested
in electric flight since my prior experience had been with glow fuel powered control
line models. Electric propulsion systems were overly heavy, overly large, and underly
(sic) powerful. Brushed motors with standard magnets, and usually without ball bearings
on the shaft lacked the power of today's brushless motors. Nickel cadmium (NiCad)
batteries have about a quarter the energy storage density as lithium types (Li-Ion
or Li-Po, so combined with the low efficiency of the motors, flight times were very
short. My first experience with an R/C e-powered model was a Great Plane Spectra
sailplane, which was a powered version of their 2-Meter Spirit glider. a while later
I tried a Carl Goldberg Mirage 550 e-powered model. Both were plagued with
brush and commutator problems. All of those issues have been solved with modern
brushless motors and Li-Po batteries - which have their own issues, primarily cost
and fire hazards. I wonder whether modern material and methods...
 Anyone
who has been in aeromodeling for more than a decade or so is familiar with the name
William (Bill) Winter. Bill has been in the model airplane realm for longer than
a lot of us have been alive and is one of the true pioneers of the sport. He has
served as editor for a couple aircraft modeling magazines, and has written countless
articles both for the magazines he edited and for other special interest magazines.
When Popular Electronics came on the scene in the mid 1950s, Bill was editor
of Model Airplane News magazine. Radio control was beginning to mature
from its infant state when only hobbyists with an intimate knowledge of electronics
were able to participate. Oliver Read, editor of Popular Electronics, tapped
Bill's ample knowledge and skill to craft quite a few articles for his own magazine.
This one, "Radio
Control Installations," appeared in the February 1955 issue. As always when
reading this type of vintage material, it is amazing how much innovation has occurred
between then and today in the fields of electronics, materials, and construction
techniques...
 Anyone who watched
the
WKRP in Cincinnati sitcom back in the 1970s has to remember what was one of
the funniest episodes ever. Here is the 4 minutes that made Prime Time history.
In this Thanksgiving episode, station owner / manager Arthur Carlson decided he
would surprise the community with good deed - that doubled as a promotional stunt
for his radio station - by dropping turkeys from a helicopter for lucky shoppers
at the local shopping mall. Watch the disaster unfold as Les Nessman reports live,
and then see Carlson's final comment that is still used or alluded to in many comic
routines. Posting this video is an RF Cafe tradition. Have a Happy Thanksgiving!
 Back in the early to mid 1970s, I built a
Sterling Cirrus sailplane kit. Shortly thereafter
I bought my first radio control system (a used
3-channel OS Digitron),
and in a somewhat desperate attempt to fly an RC glider, actually managed to cram
two of its huge servos, a huge metal-cased receiver, and a NiCad airborne battery
pack (the only part that has not gotten smaller in the intervening 50 years) into
the cockpit area. Although the cockpit was very spacious, the balsa frame construction
was way too weak to support a radio system, but that didn't stop me... well, not
right away anyway. The ready-to-fly weight was probably three times the recommended
12 ounce nominal. Although the Cirrus has a generous 87-5/16" wingspan, with it
25:1 aspect ratio, the root chord is only a little over 4" and the wingtip chord
is around 1". Even with vertical sheer webbing between the upper and lower main
spars, the wing was far too weak for so much weight. After much work covering the
undercambered airfoil and compound curves around the fuselage with Japanese tissue
and brushing on a few coats of clear dope, it was finally ready to fly...
 The cost of balsa, like everything else,
has been rising significantly since the COVID-19 "plandemic" hit the world a couple
years ago. Along with it the price of manufactured kits has gone up as well. A simple
1/16" x 3" sheet of balsa now costs around $2.00 (Sig price). In 2019, you could
get it for $1.13 per the stored page at Archive.org. That's a 77% increase. Being
a scratch builder of model airplanes, I frequently watch e-Bay, RC Universe,
RC Groups, etc., for bargains on balsa, but they're getting harder to come
by. If you have to order a balsa block online, there is a good chance it will end
up being more dense (i.e., harder and heavier) than desired. Since local hobby shops
(LHS's) are very rare these days, there is seldom an opportunity to go in and look
for a suitable block prior to purchasing...
 "How it grew from the Wright brothers’ airplane
to become the largest military branch of its kind in history. A B-17G Flying Fortress
and a B-52H Stratofortress fly in a heritage flight formation on Saturday, May 13,
2006 during the Defenders of Liberty Airshow at Barksdale Air Force Base, Louisiana.
These two aircraft represent 70 years of "fortresses." It was the first time in
50 years that they flew together in formation. Millions across the nation and around
the world celebrated the
75th anniversary of the United States Air Force on September 18, 2022. FLYING
also celebrates this 'birthday' and salutes the men and women who serve - and who
have served - as members of the U.S. Air Force and its predecessors. Origins: Orville
Wright made the world’s first controlled, powered, and sustained heavier-than-air
human flight on December 17, 1903. Less than four years later (August 1, 1907),
the U.S. Army Signal Corps formed an Aeronautical Division..."
 Declaring
any kind of straight LC tank circuit to be high stability is a bit of a stretch
when compared to the Q available simply by adding a crystal, even in 1958. Tone
modulation was an early method for achieving remote control of model airplanes,
boats, and cars. The number of channels with these
tone modulation systems is two times the number of modern proportional systems
in that moving the rudder left took one channel and moving it right took another.
Up and down elevator likewise took two channels. Therefore, this four channel system
is only two channels by today's terminology. Technology evolved into fully proportional
systems on crystal-controlled 27 MHz using pulse position modulation (PPM),
then to 72 MHz, and today nearly every every R/C uses a combination of frequency-hopping
spread spectrum (FHSS) and direct-sequence spread spectrum (DSSS) in the 2.4 GHz
ISM band...
 Ambroid was probably the biggest name in
model aircraft cement. It has been around in one form or another since the early
1900s. The name is a portmanteau of amber (its color) and celluloid. By the time
I got into the balsa model building scene in the late 1960's, Duco cement was being
fairly widely used, and since it is what was on the shelf of my local convenience
store, that's what I used. A few years later when I was driving and could visit
hobby shops, I tried
Ambroid cement, but never really took to it, primarily because it seemed to
get brittle quickly. There was never a joint failure I could attribute to Duco cement,
so I stuck with it (pun intended). About ten years or so ago the price of Duco cement
began going way up, so nowadays I use mostly Sigment*. I had used Sigment occasionally
prior to that and had confidence in its integrity. It appears Ambroid cement is
no longer being manufactured, but Sigment is, so I highly recommend it as a general
purpose glue for balsa structures...
 All
the world's astronauts have been launched to the ISS via the communist, America-hating
countries of Russia and China since the Space Shuttle program shut down in
2011, with no
standby replacement capability. "NASA's moon rocket
is back on the pad for another launch attempt, following more repairs. The 322-foot
rocket departed its hangar in the middle of the night and completed the 4-mile trip
shortly after sunrise Friday. NASA is aiming for a launch attempt on Nov. 14, sending
an empty crew capsule around the moon and back in a dramatic flight test before
astronauts climb aboard in a couple years. Forecasters are keeping their eyes on
potential tropical weather that could interfere. It is NASA's biggest step yet to
get astronauts back on the moon by 2025. The space agency is nearing the 50th anniversary
of its last human moon landing: Apollo 17 in December 1972..."
 My Ace
All Star biplane was built while I was stationed at Robins Air Force Base, in
Warner Robins, Georgia (just south of Macon). A pair of foam wings help it to build
quickly. Ace sold both this tapered chord version and a constant chord version of
the foam wings for decades, and they are still very popular on eBay when they come
up for sale. I put an OS .15 engine up front, and three channels worth of Hobby
Shack Cirrus 4-channel radio in it. My memory of the All Star is not very clear,
although I do remember flying it in a field somewhere out on the back 40 (more like
back 400) acres of the base where no full-size air traffic ventured. It lost its
life during some dumb low-level maneuver, and went down really far away. That involved
walking through a lot of tall grass - in Georgia, where snakes and even alligators
were not uncommon. I seriously considered just leaving it there, but my unwillingness
to abandon that amount of investment (quite a lot for a USAF enlisted guy's pay)
overpowered the chicken-ness in me and I cautiously waded over to it. I snatched
it up and made like an F-15 back to open ground exactly in the path from which I
came...
I remember receiving my copy of the September 1973 issue of
American Aircraft Modeler
magazine with the photo of the
Sparrow RPV (remotely piloted vehicle) on the cover. Such a thing was a big
deal back in the day. It was ground-breaking research and development for small
RPVs with real-time video feedback. There was no Global Positioning System (GPS)
to help guide the airplane and flight stabilization was relatively crude. Well-known
R/C modeler and former AMA president
Don
Lowe was on the team. "On Monday, Oct 19th Jim Dalton and Doug Erhardt delivered
a new aircraft to the museum, the Sparrow. Offered by Jim and accepted by the Museum's
Acquisition committee, the aircraft was designed by Raymond Fredette of the Flight
Dynamics Laboratory at Wright-Patterson Air Force Base in the early 1970s..."
 If you
thought the only 1940's-60's era vehicles still serving as mainstream transportation
in Cuba were rusting hulks of Chevys and Fords, check out this Antonov An−2 biplane
just used by pilot Ruben Martinez to escape the island paradise. This plane could
have been on an airport tarmac during the
Cuban Missile Crisis.
That beautiful radial engine is similar to the ones in the Boeing B−17 Superfortress
used in WWII. Maybe Mr. Martinez should have routed his flight to cross into
the USA via Mexico, because recently some
Cuban refugees arriving via the ocean have been returned, while millions of
undocumented, unauthorized aliens are welcomed at the land border. The State Department
began allowing
travel to Cuba for certain purposes in 2017 in spite of the long-standing atrocious
human rights policies. Here is a video of an R/C
Antonov An−2...
 To the average Joe model builder who otherwise
has no shot at national recognition, having his model airplane featured in a magazine
like this 1939 issue of Flying Aces was a major source of pride. Even today
with easy access to making yourself known on the Internet, there is still something
special about seeing your self and/or your model appear in print. The Academy of
Model Aeronautics (AMAs) has each month a "Focal Point" section in its Model
Aviation magazine consisting of a collection of photos and descriptions of
models submitted by members. Most seem to be radio control, with an occasional control
line or free flight model. I even managed to have my scratch built 105% Aquila sailplane
in there a few years ago. As you can see in this "With the
Model Builders" page that there were no R/C models at all. The Good brothers
(Walt and Bill) were still in the early stages of developing reliable radio systems
at the time...
 This
Sketchbook was
scanned from the March 1957 issue of American Modeler magazine, published
by the Academy of Model Aeronautics. Most building tips are timeless. Even in this
era of ready-to-fly (RTF), almost-ready-to-fly (ARF), bind-and-fly (BAF), etc.,
there are still many modelers who build their own aircraft. Nearly all top tier
competition fliers build their own models, as do aficionados of vintage (aka old-timer)
models. Some guys just would rather build than buy a pre-build airplane, whether
from a kit or from plans. I like the idea of using a sharpened bullet cartridge
for boring lightening holes in ribs, tail surfaces, etc., rather than using a drill
bit. The tip about using a slot in the bellcrank for the flaps of a control line
stunt models seems a bit iffy, since it can permit oscillations (fluttering) during
normal flight...
 Sure, you can go online and find hundreds
or maybe thousands of instances of real-life
aircraft instrument images for your model airplane or helicopter, then scale
them to the right size and do a high definition color printout for gluing onto the
panel of your latest pride and joy. However, prior to just a couple decades ago,
the task was more difficult. You could fairly easily find instrument images in magazines
and books and then make copies on a printer or copying machine; some even had a
scaling function allowing you to change the size to fit your need. That was so for
about the last four to five decades, and often gaining access to a printer. Before
that, it was necessary to either be lucky enough to find printed images of the correct
size, or buy a set of printed instruments from a company that sold instruments sets
of various scales...
 Airplanes and Rockets website visitor
Lieven M. requested that this article on the Blohm Voss 141-B (BV 141-B)
be scanned and posted from the August 1970 edition of American Aircraft Modeler
magazine. The BV 141-B, designed by Mr. Terry Aldrich, is a unique scale subject
in that it is a World War II German fighter-bomber featuring an asymmetrical
configuration. It looks sort of like a P-38 Lightning with the right boom missing.
The engine in on the left at the nose end of the single fuselage boom, and the pilot
compartment is on the right, on the wing. The horizontal stabilizer span is about
80% to the left of the vertical fin, and 20% to the right of it. Construction uses
sheet balsa for the wings, tail surfaces, and profile fuselage. Power is provided
by a single 049 engine...
 "The
eVTOL movement came on the scene around 2012, promising fast, point-to-point,
intra-urban transportation -after an Uber-in-the-sky vision. Their futuristic looks
and eco-friendly, mainly lithium battery-powered electrical propulsion systems garnered
plenty of publicity and enthusiasm. A blizzard of designs ensued. Transport Up,
a website that tracks news related to electric vertical takeoff and landing aircraft,
says there are some 98 designs now in the works - not counting hoverbikes and other
single-person aircraft. The Vertical Flight Society's Electric VTOL News), also
covers the industry. It lists a whopping 679 designs, divided among vectored thrust,
lift and cruise, wingless multi-copters, electric rotorcraft, and hoverbike categories.
The National Business Aircraft Association reported that 400 companies are involved
in some segment of this future aviation vision, be it in UAM (urban air mobility),
AAM (advanced air mobility - including longer-range..."
 These are not your father's bombs; in fact,
they're your great-grandfather's bombs. Note that per the title "Bombs of the
World War," there was no "I" or "1" appended to it. That is because as we learned
in grammar class in elementary school while being instructed on creating outlines,
one does not assign a number "1" or a letter "a" or "A" if there will be no number
"2" or letter "b" or B." Since what we now refer to as World War I was "the
war to end all wars," there was no expectation that there would someday be a World
War II. Hence, up until the end of 1941, people referred to the 28 July, 1914
through 11 November, 1918 conflict simply as the "the World War" or "the Great War."
But I digress. Many of the bombs shown here were tossed out of the cockpit by either
the pilot or back seat bomber/gunner. BTW, when I saw that the Whitehead Aircraft
Torpedo supposedly had an 8,000 yard (24,000 feet, or 4.5 miles) range running on
compressed air...
|
Academy of Model Aeronautics
-