2
to electronically reverse the wiring inside one of the elevator
servos so that both elevators will go up (or down) at the same time.
However, there is an after-market Y-harness available that
electronically reverses one of the elevator servos for you. It also
has a centering adjustment pot that lets you dial in the elevators
exactly to a neutral relationship with each other. The product is
called the "MIRACLE Y™ Servo Reversing Y Adapter", sold by
MAXX PRODUCTS of Lake Zurich, IL. It can be ordered with any
radio manufacturer's connectors you specify. We have thoroughly
tested this product and found it to be reliable, easy to use and very
reasonably priced. In addition, it is a total of 24" in length - 12" of
elevator extension cables and a 12" cable lead to the receiver.
Perfect for the EXTRA 300XS!
RX BATTERY PACK: Finally, since you will be using a total of six
servos to fly this airplane, we strongly suggest you use a large
capacity battery pack for use in this model. We have used both
1000 mAH and 1200 mAH packs with very good results. Using the
light 1000 mAH pack, we have been able to safely fly five or six
flights during any given flying session, a reasonable amount of
flying time for most modelers. Naturally, a larger pack provides
more flight time but remember that larger can also equate to
heavier. We also suggest that you routinely use an Expanded
Scale Voltmeter (ESV) at the field to check the charge condition of
your batteries. This common piece of field equipment can save
your model!
ENGINE & PROPELLER
The SIG EXTRA 300XS ARF has been flown with a wide variety of
engines. As everyone knows, there is no substitute for power and
the engines recommended for this model all provide good power
margins. Naturally, the larger engines in this range make more
power and will fly the EXTRA with more authority than the smaller
engines. It is simply a matter of how you want to fly the airplane.
2-STROKE ENGINES: If you want to use a 2-stroke engine, we
recommend an engine with 1.20 - 1.50 cu. in. displacement. We
have tested both the Irvine 1.20 and 1.50 2-stroke engines
extensively and found that both engines provide suitable power and
are easy to install and operate in the EXTRA 300XS. In the case of
the Irvine 1.50 with a 16 x 8 APC prop, we have excellent vertical
performance - not unlimited vertical, but it will go straight up for an
impressive distance, much longer than most typical R/C models.
When using a 2-stroke engine inside a cowling, mufflers are often
a problem. But not in this case! SIG stocks a special in-cowl
muffler for use with either the Irvine 1.20 or 1.50 engines in the
EXTRA 300XS ARF.
This muffler is very effective and fits
perfectly inside the cowling. The SIG part number for this in-cowl
muffler is #IRV120150M.
4-STROKE ENGINES:
If you want to use a 4-stroke engine,
we recommend 1.40 - 1.80 cu. in. displacement. Good choices
currently on the market would be the YS 1.40 and the Saito 1.80.
GAS ENGINES: If you want to use a gas engine, we recommend
a maximum displacement of 2.4 cu. in. Our hands down favorite is
the FPE 2.4 cu. in. gas engine, available from SIG. Weighing only
52 ounces, this compact powerhouse delivers approximately 18
pounds of thrust with a 20 x 10 prop. You can imagine how that
makes a 12 - 13 pound EXTRA perform! If you decide to install
a gas engine in your EXTRA, be sure to substitute a gasoline
compatible fuel tank stopper and fuel tubing for those items
supplied in this kit.
The fuel tank body itself is gasoline
compatible.
KIT CONTENTS
The following is a complete list of every part included with your
EXTRA 300XS ARF kit. Each part has been individually inspected
and carefully packed here at the SIG factory by SIG employees.
We urge you to be as careful as we have been, using the check-off
blocks to inventory your kit before beginning assembly.
FUSELAGE & related parts
❑
1 Fuselage, covered
❑
1 Fuselage Bottom Fairing, covered
❑
1 1/8" x 2-9/16" x 7-7/8" plywood Front Fuselage Hatch
❑
1 Fiberglass Cowling, painted
❑
1 Molded Plastic Tail Fairing, painted
❑
1 Molded Clear Plastic Canopy
❑
1 Molded Plastic Cockpit Deck, painted
❑
1 Printed Instrument Panel
TAIL SURFACES
❑
1 Fin, covered
❑
1 Rudder, covered
❑
1 Stabilizer , covered
❑
1 Right Elevator, covered
❑
1 Left Elevator, covered
FPE 2.4
GAS ENGINE
4-STROKE
2-STROKE
SIG-IRVINE
IN-COWL MUFFLER