Turnaround time between flights is less than a minute because the hatch
simply lifts off. The battery can quickly be swapped.
Bonus photos of the PT- 19
can be seen here or online at
The various prototypes have been covered with everything
from Solarfilm to EconoKote. A slight weight savings is an
advantage of this type of film covering, but does not affect
its flying abilities.
The motor is an E-flite 450 outrunner and is used with a
10 x 5E or 10 x 7E APC propeller. It is rated for 14 amps for
Scale models in the 30-ounce weight range. Any motor in
that range should work.
Power is managed with a Castle Creations Thunderbird
18-amp ESC connected to a 1,650-2,000 mAh LiPo 3S
battery. Mine are from Common Sense RC. The motor
current is set up using an Astro-Flight watt meter at 10-12
amps static using the ATV function on the transmitter. I
used a Futaba 8U transmitter linked to a four-channel Berg
Two Hitec HS- 81 servos control the rudder and elevator,
and two Hitec HS- 55 servos work the ailerons.
The receiver and rudder and elevator servos are
mounted to the battery compartment floor, with the
aileron servos mounted in the wings. Du-Bro aileron
linkage and park flyer pushrods are used throughout.
I chose E-flite wheels. The mains are 21/2-inches in
diameter with a 3/4-inch diameter wheel on the tail.
Similar to Bob’s original glow version, my electric PT-
19 is a pleasure to fly. It is the one model that I can say
flew right off the building board.
If I had to compare it with anything in the commercial
t is most
out of a parking
ot, but with
2- or 21/4-inch
wheels it will
ly off short
The PT- 19
s not twitchy
imited to the
or the first few
It is a true sport
model that can
with ease. Large
flight, stall turns, snap rolls, aileron rolls, and spins are a
With the 2,000 mAh flight packs, and my flying style
(half to three-quarters throttle), flights are approximately
15 minutes, leaving the battery warm to the touch upon
At a weight of 25 ounces, it is best in light air but can
easily handle midafternoon breezes. Turnaround time
between flights is less than a minute because of easy battery
To land, keep the nose down and carry a little power on
approach. Flare holding the nose up and let it settle.
Its wide gear and long tail make takeoffs a breeze. It tracks
straight with no tendency to swing on takeoff. If you use the
450-sized motor, it only needs roughly 20 feet of runway.
Everywhere I take it people ask me what company
manufactures it and I get to tell them it is scratch-built. The
pride that comes from that would make it difficult for me to
go back to ARFs.
Thank you to Callie Graphics for the custom decals and
John Valentine of Top Notch Product Company for the short
—Charles S. Pipes
Top Notch Product Company
Common Sense RC
53 Model Aviation OC TOBER 2013 www.ModelAviation.com