Great Planes Extra 300S 60 Kit - GPMA0236 - Manual (Page 3)

and even better with a .91 4-stroke, but seasoned experts
will surely want to get the most out of the Extra by
strapping on a .91 2-stroke or a 1.20 4-stroke.
We hope you enjoy building and flying your Great Planes
Extra 300S as much as we did flying the prototypes.
1. Build the model 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 should be
considered as 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. Properly install all components so that the model
operates properly on the ground and in the air.
5. Check the operation of the model before every flight to
insure that all equipment is operating correctly 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.
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 model,
please call us at (217) 398-8970 and we’ll be glad to help.
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.
We can also be reached by E-Mail at:
[email protected]
Items in parentheses (GPMQ4243) 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.
❏
Four-channel radio with five servos (Optional 6th
servo for twin elevator servos)
❏ Engine – See Engine Selection above
❏
Exhaust – See Exhaust System above
❏
Spare glow plugs (O.S. #8 for most 2-stroke engines,
OSMG2691, O.S. Type-F for most 4-stroke engines,
OSMG2692)
❏
Propeller (Top Flite ® Power Point ™ ); Refer to your
engine’s instructions for proper size
❏ Top Flite Super MonoKote ® covering (2 to 3 rolls) –
See Covering (page 40)
❏
Fuelproof paint, See Painting (page 40)
❏
Fuel tank 12 oz. (GPMQ4105)
❏
3" Medium fuel tubing (GPMQ4131)
❏
1/4" Latex foam rubber padding (HCAQ1000)
❏
1/16" Foam wing seating tape (GPMQ4422)
❏ (2) 2-3/4" Wheels (GPMQ4224)
❏
(1) 3/16" Wheel collar (GPMQ4308)
❏
2-1/2" Spinner (GPMQ4520, White)
❏ Pilot (DGA ® 1/4 scale sportsman pilot used in protype,
DGAQ2010)
❏
Fueling system (Great Planes Easy Fueler ™ ,
GPMQ4160)
❏
Pacer Formula 560 canopy glue (PAAR3300)
Required Accessories
PREPARATIONS
Engine Selection
There are several engines that will work well in your
Extra 300S, but for unlimited performance we
recommend a hot 2-stroke such as an O.S.
® .91FX or
SuperTigre ™ G90. If you prefer a 4-stroke, an O.S. .91
Surpass ™ works well and the O.S. 1.20 Surpass makes
unlimited vertical lines a part of every flight experience.
Your choice of 2-stroke or 4-stroke will determine the
location of the pushrod exit on the firewall, so plan ahead.
Exhaust System
If you choose to use a 2-stroke engine, you will need an
in-cowl muffler for the best appearance. On our protype
Extra 300S with the O.S. .61FX, we used the Slimline
#3217 Pitts Muffler (SLIG2217). With the O.S. Surpass
.91 and Surpass 1.20, we used the stock muffler
included with the engines. The Hobbico exhaust
extension allows the stock muffler to fit inside the cowl.
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
performance of your completed model, and no
representations are expressed or implied as to the
performance or safety of your completed model.
PRECAUTIONS
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