Here’s the author’s American Spirit twin design. It has the same
aerodynamics and power specifications as Buddy Wieder’s new twin, but
features a more jetlike fuselage shape. Both models feature E-flite 10-15
retracts in a tricycle-gear configuration.
Ryan Wieder likes the way his dad’s new twin
looks. Buddy named it Ryan’s “Evil” Twin.
The model has 690 square inches of area and
is powered by two Cobra 2814/16 1,050 Kv
motors. It uses two Phoenix ESCs, a single
4,000 mAh battery, and a specially designed
Will Hubin timer. Photo by Buddy Wieder.
probably have a bunch of twists in your
lines by now!
I had a chance to help a new Stunt
pilot learn this maneuver this past
because he made
all of the mistakes
that I discussed in
that column. He
made the first loop
fairly well, but he
had a tendency
to make each
smaller in size, and
bled off too much airspeed. On several
occasions, that resulted in a stalled
model that barely made a safe recovery
back to level flight.
With some coaching he was able to
make the loops all at nearly the same
size, and maintain adequate airspeed.
Overcontrolling is the most frequent
mistake made when learning the looping
One error that he made was not
tracing the shape of the maneuver with
his arm. I discussed this technique at the
beginning of this maneuver series, and
it is important to learn. After he began
scribing the shape with his arm, and
inputting less control with his wrist, the
loops smoothed out and there was no
tendency for the model to stall and fall.
For those of you who are involved in
competition and already know how to
fly the pattern, there are several mistakes
that can creep into the performance
of this maneuver. The most frequent
mistake is making the loops “egg
shaped,” either vertically or horizontally.
The loops should appear absolutely
round to the judge or to your coach.
CONTROL LINE AEROBATICS