Latest Update: 4/10/2012Note:
now has a short kit for the ½A Skylane
can be purchased from
I've decided to build another 1/2A Skylane. This time it will be electric. As with the one described below that
was powered with a Norvel .061 nitro fuel engine, this one will be built by creating a kit of parts derived from
tracing around the original kit parts. Surprisingly, especially for the era, the balsa and plywood used in the original
kit are very high quality and the density of the wood is excellent. Of course, the nice thing about cutting parts
from scratch is that you get to hand-select all the wood.
A copy of the original plans was obtained off of
eBay before I actually bought a kit off of eBay as well. The guy presented the plans as if they were the originals,
but turned out to be a cheap copy. The size increased by about 1% or so during the copying, so the parts aren't
quite a match to the plans. They do
match original plans that I got with the kit, though.
Website visitor Bill Mohrbacher sent these photos of his Carl Goldberg 1/2A Skylane that he built many moons ago.
His Skylane looked better than any of mine even after crashing! Read his note
intention is to replicate the kit pretty much exactly per the original, but I will need to do some modifications
to accommodate the brushless motor setup. It will be 3-channel, with throttle, elevator, and rudder. The original
plans shows installation for both a servo (very large) and an escapement. If all goes well, I hope to actually use
a nano servo to drive a torque rod to control the rudder, per the original. I'll provide photos once it has been
done. Unlike the escapement control that provides center and full throw left or right, this will be proportional.
On the .061-powered version, the elevators we separate and controlled by a split pushrod. This time, they will
be jointed and hinged along the same line so that a single pushrod can be used.
Here is a tip that makes
cutting out the plywood parts much easier where inside curves are required. Use a Forstner bit of proper radius
to cut the radii, and then proceed with cutting everything else either with a jigsaw or band saw, and sand to final
size. Doing so virtually eliminates any tendency for the plywood layers to pull apart or chip off while cutting.
I was actually able to control the Forstner bit positions tightly enough (using a drill press) to not need to sand
the inside curves.
a kid back in the 1960s, I built two Carl Goldberg 1/2A Skylane models. They were intended for a single-channel
escapement system, but I never did accumulate enough money for the radio, so they ended up as free flight planes.
Both were powered with Cox Baby Bee .049 engines. By today's standards, the kits were very difficult to build -
lots of interlocking parts and poor die cutting compounded the problem. I remember tying a string to the propeller
and dragging it behind my bicycle, carefully governing the speed to get it to the point where it would just begin
to become airborne, then backing off.
Skylane in the photos was built from parts traced from a kit I purchased on e-Bay a few years back. Rather than
making the fuselage sides out of three or four pieces, it was made of a single sheet with appropriate doublers.
Other than that kind of improvement, everything was built pretty much per the original. I made the mistake of substituting
a relatively heavy spruce wing spar for the normal balsa one.
A 2-piece elevator was necessary to keep the
scale appearance, since the trailing edge of the horizontal stabilizer tapers forward on both sides; that was a
real pain because it required a split pushrod arrangement and contributed to a tail-heavy end result. Admittedly,
I could have done a better job with both the elevator and the rudder pushrods, so maybe the next time around a better
system will prevail. Even with three Futaba micro servos and a 300 mAh battery pack, the model ended up very heavy
- and flew like it.
Norvel .061 was also way too much power for it, but better more than enough power than not enough is my motto. The
1/2A Skylane was stable in the air, but landed very fast because of the relatively high wing loading and stall speed.
I don't have the flying weight number handy, but it was around 6 ounces over the max recommended by Carl Goldberg,
partly due to 2.5 ounces of lead necessary in the nose to balance it. I still have the kit of parts and the plan,
so some day I'll build another and use a really lightweight radio system and be more choosy with balsa/plywood selection.
The AMA Plans Service offers a full-size version of plans at a very reasonable cost. They will scale the plans
any size for you. http://www.modelaircraft.org/plans.aspx
I am now working (very slowly) on an electric-powered Carl Goldberg 1/2A Skylane. MotoCalc software was used
to determine which motor/battery combination would be necessary in order to achieve the desired performance. Here
is a snapshot of the input parameter screen and of the output performance prediction screen. The data provided for
my electric-powered of the Great Planes Spirit (e-Spirit
) worked out extremely
well, so I trust this prediction.
Here is my personal 1/2A Skylane kit. The plans are shown below, and at some point in the future, I'll post
photos of all the parts.
Carl Goldberg 1/2A Skylane Plans
AirplanesAndRockets visitor Kim Stricker
has been kind enough to send
photos of his 1/2A Skylane that he built as a teenager. The paint scheme is modeled after a Missouri Highway Patrol
aircraft - quite a nice job!
Here is an advertisement from the January 1970
issue of the AMA's American Aircraft Modeler magazine
This is the Skylane 62 kit that I purchased off of eBay a while back. It has since been sold.
Here are a couple recent eBay auction ending prices - $292, $305, and $265 for this exact same kit. It is
rare to find one for sale.
Note from Bill Mohrbacher
"Today I saw your CG 1/2A Skylane post. Back in 1964/65 I built one. I was covered
with yellow silk and painted with Sig dope. I love transparent finishes. The framework fascinates me,
I love to look through it when I am flying overhead, and I am also quite vain and proud of my work.
found CG kits to be well engineered. Parts were ACCURATELY drawn and produced (not like Sterling and
Berkeley). Material selection was excellent. There was a lot of work in the assembly and you had better
know how to contour and block sand, but the final results were spectacular. And the planes were always excellent
fliers. Cark Goldberg's experience sure showed in all of them!
I don't know what mine weighed, but
it was probably on the light side. Power was a 1964 Fox .049, Citizenship superhet relayless rcv,
Mule MK II xmitter, Babcock MK II compound escapement (can't use esc abbreviation anymore for this vintage mechanical
wonder), and 2 pencell battery PS. I didn't use the kick up, just rudder and no throttle. I
could do loops, Immelmans, Cuban 8s, and barrel rolls; typical RO maneuvers.
Then I got fancy. I installed
a MaX 10 RC engine, OS single channel throttle servo and SC rudder servo, Controlaire SH 100 Superhet relay
rcv, and 2 more batteries, 4 total. All was well until the first loop and then the balsa wing spar failed.
I have always wanted to build another; someday!"