The PT- 19’s profile fuselage makes this engine and
fuel tank very accessible.
SIX TIPS FOR SUCCESSFUL U-CONTROL FLYING
■ Be sure to run the engine a few hundred rpm under maximum so the plane will have
good pull when it’s flying. Lower rpm may not allow maximum pull from the plane as it
flies around the circle.
■ When mounting the engine, make sure
that it has plenty of right thrust so the
prop will pull on the line. The right angle
on the engine will pull against the line
and keep it taut throughout the flight.
■ When the plane flies into the wind and
the line tension wanes, walk backwards
Take a trip
away from the plane until the line tension
down
becomes solid.
memory
lane with
■ Once the engine quits, walk backwards
your very
from the plane to keep the line toewnnsion
and land the plane right away.
Hangar 9
PT- 19 con-
NEUTRAL ELEVATOR
■ Be sure the control leads exiting the wing
trol-line
ARF.
are not twisted. Pull the front cable for up
and pull the aft cable for down.
■ To maintain your orientation, do a few
circle flights, then add a wingover or loop.
This will lessen the chances of becoming
dizzy.
Very nice, pre-bent gear and foam wheels are
included in the kit.
HAND POSITIONS
UP-ELEVATOR
DOWN-ELEVATOR
The wooden control handle’s cable leads attach to
the two multi-strand steel control cables with
heavy-duty quick disconnect clips.
wheels are installed and held in place
with wheel collars. Make sure to use
thread-locker on the setscrews for the
wheel collars so they don’t become loose
due to vibration in flight.
The profile fuselage is very simple and
requires no additional fiberglass or ABS
parts. All that’s needed to complete the
fuselage is to mount the engine using the
four supplied nuts and bolts and glue the
vertical and horizontal stabilizers in place
with 30-minute epoxy. One thing worth
mentioning is the right thrust of the
engine. This is just something to keep in
mind as you build your kit.
All the trim and markings are preinstalled on the PT- 19 Control Line 36 Profile
ARF, eliminating the need for decals to be
applied. There’s very little hardware in the
way of nuts and bolts. All of the hardware
that’s included is metric and other than the
wheel collars, require Philips screwdrivers
to install. The kit also includes an Allen key
for the wheel collars.
There’s nothing special about the
mounting of the engine, but I do have a
recommendation. The manual mentions
placing washers under the front lugs of the
engine to increase line tension. I found
this necessary to maintain adequate tension to fly the PT- 19 Control Line 36
Profile ARF.
The directions for the engine also recommend that you tune your Evolution . 36
engine for a fast 4-stroke. This may provide
adequate thrust with a two-blade prop, but
I found it to not be enough to fly the plane
properly out of the box. This caused a
minor incident on my first outing but
repairs were very easily made. On the following trip to the field, I tuned the engine
as I would any other two-stroke RC engine
and performance was much better.
CONCLUSION
The PT- 19 Control Line 36 Profile ARF can
easily be built-in an evening or two after
work by someone with limited knowledge
of building model airplanes. The manual is
very helpful and features a lot of pictures
and clear, concise instructions.
One area I am concerned with is the control lines themselves. They seem a little
thin for a plane of this size. On my second
trip to the field, I had a hard time deploying the lines without significant amounts
of tangling. Once I got the lines straightened out and the plane in the air, I
experienced a failure of one of the lines,
which caused me to lose the model. This
may be a result of the tangled lines and in
fact, my fault, but it’s something worth
keeping an eye on. Prior to flying your PT-
19 Control Line 36 Profile ARF, be sure to
always perform a pull test.
