The RCPRO Warbird Course will be used for the Warbird Pylon Racing event at the 2016 Nats. It is
designed for safety and is used for waivers for sanctioned warbird events in RCPRO and RCPRO-derived class races. The breakout times are established for this course.
The World Models Spitfire
40 was built for Warbird
Pylon Racing. It features
a strong firewall with
enough space for
This is the YS115FZ-WS Warbird Special
engine. It is an evolved version of the YS110
and fits in the same mounting pattern.
require significant effort to make an
ARF hold up to the speeds required to
compete in the Gold class, but some
manufacturers produce models that do
hold up to Gold-class speeds.
One of the newer models in the
marketplace is the Spitfire 40 by The
World Models. Although it has 40 in the
name, this model was built to be able
to handle the YS115FZ-WS (Warbird
Special) by YS Engines. YS engines are
popular. The YS FZ63S works well in
the Bronze class; the YS91 does well
in Silver; and the YS110 and YS115
engines are popular choices in the Gold
class. All of these engines are crankcase
supercharged and have pressurized
fuel systems that perform well on the
straightaways and in the turns.
The Spitfire 40 has electric retracts, a
strong wing, and solid balsa tail surfaces.
The solid surfaces make it too tail-heavy
for a . 46 two-stroke engine without
significant weight added up front. The
YS115FZ-WS weighs approximately 26
ounces and the airplane will be slightly
nose-heavy if assembled according to
the manual. Shifting the throttle servo
rearward and putting the receiver behind
the servos can balance it.
The Saito FA-125A AAC with a
muffler weighs 22 ounces. If you want
to go with a two-stroke engine, the
relatively new O.S. 95AX Ringed engine
with muffler weighs 20 ounces. The
older O.S. 91FX Ringed engine with
muffler is in the 20- to 24-ounce range,
depending on the muffler.
There are no muffler limitations other
than two-stroke engines need to have a
muffler or a tuned pipe. Jett Aerotech
has a variety of engines that can be used
and offers mufflers for other engines if
you need a performance boost.
Richard Verano of YS Engines and
Pylon Racing fame had significant input
on the Spitfire 40. I spoke with him
about tips and modifications for Gold-class racing and I purchased a YS115FZ-
WS to go in mine.
I plan to make videos about the
Spitfire and the YS engine, as well as
other warbird racing aircraft, and share
some tips from Richard. Check out my
videos at the link listed in the “Sources”
If you are racing under RCPRO
39 Model Aviation MAY 2016