Great Planes Extra 300S 40 Kit - GPMA0235 - Manual (Page 3)

or aileron throw to put the Extra through its paces. Of
course, the throws can be decreased to low rates
(illustrated in the instructions) if you'd just like to take it
easy and poke holes in the sky. The Extra performs
surprisingly well on a ball bearing schnurle ported .40
2-stroke but seasoned experts will surely want to get the
most out of the Extra by strapping on a .46 2-stroke or a
.70 4-stroke.
We hope you enjoy building and flying your Great Planes
Extra 300S as much as we did the prototypes.
Please inspect all parts carefully before starting to
build! If any parts are missing, broken or defective, or if
you have any questions about building or flying this
airplane, please call us at (217) 398-8970. If you are
calling for replacement parts, please reference the part
numbers and the kit identification number (stamped on
the end of the carton) and have them ready when calling.
1. Build the plane according to the plans and instructions.
Do not alter or modify the model, as doing so may result in
an unsafe or unflyable model. In a few cases the plans and
instructions may differ slightly from the photos. In those
instances the plans and written instructions are correct.
2. Take time to build straight, true and strong.
3. Use an R/C radio system that is in first-class condition,
and a correctly-sized engine and components (fuel tank,
wheels, etc.) throughout your building process.
4. You must properly install all components so that the
model operates properly on the ground and in the air.
5. You must check the operation of the model before every
flight to ensure that all equipment is operating, and that the
model has remained structurally sound. Be sure to check
nylon clevises or other connectors often and replace them if
they show signs of wear or fatigue.
6. If you are not already an experienced R/C pilot you must
fly the model only with the help of a competent, well
experienced R/C pilot.
Remember: Take your time and follow directions to end
up with a well-built model that is straight and true.
Items in parenthesis (OSMG2691) are suggested part
numbers recognized by distributors and hobby shops and
are listed for your ordering convenience. GPM is the Great
Planes brand, TOP is the Top Flite brand, and HCA is the
Hobbico brand.
❏
4 Channel Radio with 4 Servos
❏
Engine - See Engine Selection above
❏
Muffler - See Exhaust System above
❏
Spare Glow Plugs (O.S. #8 for most 2-stroke engines,
OSMG2691)
❏
Propeller (Top Flite ® Power Point ™ ); Refer to your
engine's instructions for proper size
❏
Top Flite MonoKote ® covering
(Approximately 2 rolls)
❏
Fuelproof paint - See Painting (page 39)
❏
Medium Fuel Tubing (GPMQ4131)
❏
1/4" Latex Foam Rubber Padding (HCAQ1000)
❏
1/16" Foam Wing Seating Tape (GPMQ4422)
❏
10 oz. Fuel Tank (GPMQ4104)
❏
(2) 2-1/2" Wheels (GPMQ4223)
❏
(1) 3/32" Wheel Collar (GPMQ4302)
❏
2-1/4" Spinner (GPMQ4517 – red)
❏
Pilot (Williams Bros. 1/5 Scale Sportsman Pilot used
in prototype, WBRQ2485)
❏
Fueling System (Top Fueler, GPMQ4160)
❏
(1) 1" Tail wheel (GPMQ4241)
Required Accessories
PREPARATIONS
Engine Selection
There are several engines that will work well in your Extra
300, but for unlimited performance we recommend a
hot
2-stroke such as an O.S. ® .46FX or SuperTigre ™ G45. If
you prefer a 4-stroke, an O.S. .70 Surpass is the ticket.
Your choice of 2-stroke or 4-stroke will determine the
location of the throttle servo and throttle pushrod exit on
the firewall so plan ahead.
Exhaust System
If you choose to use a 2-stroke engine we suggest an
in-cowl muffler for the best appearance. On our prototype
Extra 300 with the O.S. .46SF we used the Slimline
#3218 Pitts Muffler (SLIG2218) without the exhaust
extension kit. If you prefer to use the exhaust extension
kit purchase #8012 (SLIG5012).
DECISIONS YOU MUST MAKE
NOTE: We, as the kit manufacturer, provide you with a
top quality kit and great instructions, but ultimately the
quality of your finished model depends on how you build
it; therefore, we cannot in any way guarantee the
perfor mance of your completed model, and no
representations are expressed or implied as to the
performance or safety of your completed model.
PRECAUTIONS
3