clevises in the assembly section, but does mention using silicon
retainers (fuel tubing) on the last page in the “Check List”
section; however, none are provided. The last step is to install
the propeller and hub.
After the Stearman is assembled and the receiver installed,
it is time to check for the proper center of gravity (CG).
The manual states that a 4S battery weighing 250 grams will
balance the airplane correctly.
I used the Pulse Ultra PLU45-22504 4S 2,250 mAh LiPo.
Pulse doesn’t make a LiPo of at least 2,450 mAh as stated
in the specifications, but the 2,250 mAh battery weighed
nearly 257 grams—more than the stated balancing weight.
When checking the CG with the battery installed, I was still
approximately 1/4-inch tail-heavy and ended up needing an
additional ounce of lead weight in the nose of the Stearman to
attain the CG.
I assembled the aircraft in the winter, but the Stearman sat
on my workbench for nearly three months while I waited for
a day that was warm enough and the wind was not blowing at
The wait was very much worth it. The Stearman is a joy
to fly. It is short coupled, so it can be slightly tricky on the
ground, but in the air it performed very well! It does all of the
expected loops, rolls, and spins, but in the hands of a capable
pilot, the 4S system has enough power to perform more-complex aerobatics such as Harriers, rolling circles, rollers, and
some 3-D-type flying!
From the great looks, ease of assembly, and great flying
performance, I highly recommend this PT- 17 Stearman.
Because of the short coupling and being a tail-dragger, it is not
a trainer airplane, but intermediate and advanced pilots will
find it a ball to fly!
ST4 Model Aviation SEPTEMBER2015 www.ModelAviation.com