In the early 1960s, Carl
Goldberg Models was reaching a crescendo in its kit manufacturing business. Many
successful models were already on the hobby shop shelves serving all genres of the
hobby - free flight, control line, and radio control. The Falcon was a particularly
big hit because it served as both a trainer and an intermediate flyer. A newbie
could buy a Falcon and use if from his maiden flight to introductory aerobatics.
Building off the success of the Sr. Falcon to come up with a ½A size version.
Rudder-only was still popular at the time, so the Jr. Falcon launched into a market
ready for another option. I don't recall ever owning a Jr. Falcon, but I have owned
a couple ½A Skylanes and a Skylark. Note in the advertisements that the price for
a Jr. Falcon was $4.95 in
then $5.95 three yeas later in
1970 - a
20% increase! In 2022 money the equivalent inflation-caused price would be
$48.05 - 9.7 times more than in 1967 (55 years). BTW, just two years ago
the price would have been $41.98 - 8.5 times more, which illustrates how incredibly
high inflation has been over the past two years.
This edition of American also ran a feature titled, "Carl Goldberg:
Goldberg Falcon Sires a Junior
One Good Kit Breeds Another: Goldberg's Falcon Sires a Junior
This first try at a commercial R/C design by
Carl Goldberg turned out so successfully that he has marketed the same design in
smaller size; both are products of Carl Goldberg Models (Chicago). Let's dig into
the original big one, to see what we can find.
Design Concept. Carl chose a medium size trainer which may be flown with the
simplest Rudder-only installation, or the smaller reed receivers and servos to fly
with . Rudder-Elevator-Motor Control. The shoulder-wing configuration is generally
more "forgiving" than the low wing.
Since it is intended to fly with elevators, if desired, the builder may wish
to try inverted operation, and the semi-symmetrical wing is accepted as a fair compromise
between good right-side-up flight and the inverted maneuvers - including outside
loops. Airfoil is of moderate thickness. The stab is also medium thick, fully symmetrical.
Dihedral is fairly modest, so if the plane is built for rudder-only, it could
be increased to provide better rolling properties - assuming the builder was interested
in violent acrobatics. If elevators are to be used, stick to the plans.
For good ground handling and ROG's, we find a trike landing gear. Nose gear furnished
with the kit is not steerable. A generous distance between nose and main gears and
wide main wheel tread assure stability in taxiing, takeoff or landing.
Construction. The Falcon is of simple construction. Two fuselage sides must be
pieced together with a "sawtooth" joint; this is strengthened by side doublers which
cover it. Fuselage formers are keyed into slots in the sides; both top and bottom
are keyed, as are such additional parts as the tail assembly seat. It would be pretty
difficult to put the fuselage together any other way but true.
Hardwood motor bearers are furnished along with plywood "breakaway" motor mounting
plate. This plate used early in the fuselage assembly assures that the sides are
Landing gear main and nose wires are formed from 1/8" music wire, the nose strut
having a 4-loop shock spring in it. Main gear is built into the fuselage bottom.
The main wing is rectangular, all ribs are die-cut, leading and trailing edges
are notched for rib positioning. The edges are shaped to required cross-section.
To spare the novice modeler some of the woes of assembling a wing with underside
convex, "Symmet-Tru" construction is featured. This includes positioning tabs on
the underside of some wing ribs, near the leading edge, easily removed after the
frame is complete. The stab, quite simple, also has rib tabs to aid assembly. Fin
and rudder are of sheet balsa, as are the elevators.
Equipment. The plane was test flown with Min-X 6 channel equipment and three
Transmite servos. It may be used with engines from .09 to .19, with .15 being favored;
the Multi test plane had an O.S. Max .15 RC engine, and a 2-oz deBolt clank tank
(there is ample room for a much larger tank).
All parts needed to complete the plane that are not furnished in the kit are
specified by name and size. The balsa has been carefully selected; wing rib sheets
are light but stiff quarter-grain stock; wing spars are hard balsa (a little heavier,
but they'll better stand the beating most beginners will give the plane), wing tips
are cut from same block of balsa, so they will be matched in weight.
Specifications. Span-56", chord-10", wing area-558 sq. in. Test plane with 6
channel equipment weighed 3 1/2 lb. Equipment space under wing, 10 x 3 1/4," high
x 2 3/4" wide; ample space for all batteries under fuel tank in forward compartment.
Knowing a good thing when he has one, Goldberg scaled his Falcon down to smaller
size. Appearance, design and construction features are so much like the 56" plane
you would have difficulty telling them apart in the air - except for the noise.
Junior is intended especially for any .049 engine ... which gives lots of leeway.
The fuselage sides have same W-joint in the center, the same doublers fore and
aft, the same keyed formers, top and bottom. Wings are made the same way, with Symmet-True
methods to assure easy and accurate assembly.
Intended basically for Rudder operation, the Jr. Falcon may be flown with kick-up
elevator and plans show where to cut the stab for this addition. Despite modest
size, there is lots of fuselage space for radio gear, both under wing and in the
nose compartment. Designer Goldberg feels Junior is ideal for the "package" radio
units, depicts the Citizen-Ship R/C Pak in one sketch. Another suggested and illustrated
installation is C & S Finch receiver with Septalette Mark V actuator, for proportional
Junior Falcon spans 37".
Jr. Falcon Specs: Span 37"; chord, 6 3/4"; area, 250 sq. in. Intended for .049
to .074 engines, integral or separate fuel tanks, beam or radial mount. Weight,
16-oz. Radio area under wing is 6 3/4 x 2 1/2 x 2" wide; 3 x 2 1/4, x 1 1/2" (average)
compartment in nose.
The AMA Plans Service offers a
full-size version of many of the plans show here at a very reasonable cost. They
will scale the plans any size for you. It is always best to buy printed plans because
my scanner versions often have distortions that can cause parts to fit poorly. Purchasing
plans also help to support the operation of the
Academy of Model Aeronautics - the #1
advocate for model aviation throughout the world. If the AMA no longer has this
plan on file, I will be glad to send you my higher resolution version.
Try my Scale Calculator for
Model Airplane Plans.