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What Radio System and Servos Should I Use?
A standard four-channel radio control system with 3 standard ball bearing servos for the flight control surfaces and 1
standard servo for the throttle will be more than adequate. To get the most out of the airplane, we suggest using a radio
control system that features dual rates, and, depending on where you end up needing to mount your receiver and airborne
battery in the fuselage, you may also need several servo extensions.
SECTION 1: OUR RECOMMENDATIONS
This section describes our recommendations to help you in deciding which types of accessories to purchase for your new
Sportsman Aviation F-20 Tigershark 40 ARF.
Please read through this entire section very carefully. We have
provided you with tips and recommendations that, if followed, will result in a great flying airplane. Failure to
follow our recommendations may result in a poor flying airplane.
What Engine Should I Use?
The F-20 Tigershark 40 ARF flies very well using a strong .40 - .46 size two-stroke engine. The airplane is light enough that
this size of engine will provide enough power for most fliers. It is on the low end of the recommended displacement range
though, so don't expect the airplane to be too blazingly fast. The engine is mounted on its side, so your engine's stock
muffler will work well.
For those flyers looking for a very fast airplane with a lot of power, we suggest using a .53 size two-stroke engine.
A .53 size two-stroke engine typically has the same footprint as a .40 - .46 size two-stroke engine, yet is lighter and more
powerful. This size engine will fit within the required engine mounting area and it won't require an after-market muffler.
With this engine, the airplane will be very fast and have a lot of extra power for great vertical performance.
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IMPORTANT
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We don't recommend attempting to use a four-stroke engine in your F-20 Tigershark 40 ARF. The
forward profile of the airplane is very small and therefore will not accommodate the larger physical size of a four-stroke
engine. The airplane is designed specifically around .40 - .53 size two-stroke engines.
What Else Do I Need?
The F-20 Tigershark 40 ARF includes most of the hardware you'll need to finish the airplane. You will need to purchase
separately a spinner and some basic building materials, such as adhesives, protective foam rubber for your radio equipment,
and fuel tubing. We've provided a list below of the items we used on the airplane shown in this instruction manual.
Here's a List of What We Used to Finish Our F-20 Tigershark 40 ARF:
QTY. 1
210760
Magnum XLS .52A Two-Stroke Engine
QTY. 1
237152
Magnum 2" Chrome Spinner
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QTY. 1
608560
APC 11 x 6 Composite Propeller
QTY. 3
759349
Hitec HS-425 Ball Bearing Servos
QTY. 1
444104
Cirrus CS-36 Standard Servo
QTY. 1
115559
Thunderbolt # 3 Performance Glow Plug
QTY. 1
115923
Global XX Silicon Fuel Tubing
QTY. 1
868638
Dubro 1/4" Protective Foam Rubber
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The part numbers listed for the Hitec servos are compatible with Hitec and JR radio control systems. These servos
are also available with connectors that are compatible with Futaba and Airtronics radio control systems. The part number listed for the
Cirrus standard servo is compatible with all name-brand radio control systems. This servo uses a universal connector.
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Spinner includes 1/4"- 28 crankshaft adapter.
