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This section describes the items you will need to purchase for your new Tubby Cubby EP. These suggestions are not set
in stone, but they should provide you with a good starting point.
SECTION 1: OUR RECOMMENDATIONS
Here's what you'll need to finish the airplane:
P/N 443526 Cirrus MRX-4 FM Super-Micro Receiver
Hitec Single Conversion FM RX Crystal
P/N 444052 Cirrus CS-10 Super-Micro Servos (2)
P/N 128482 Wattage IC-5A Micro ESC
P/N 128526 Wattage 6 Cell 650Mah NiMH Flight Battery
P/N 130103 Wattage 6-8 Cell 1 amp AC/DC Peak Charger
IMPORTANT
The Tubby Cubby EP is a lightweight, slow-flying electric-powered model. When choosing accessories like servos,
ESC, and receiver, it's very important to take the weight of these items into consideration. Remember, the lighter the
overall weight of the finished airplane, the better the airplane will fly.
What Servos Do I Use?
The servos you use should be the lightest available, yet still have an adequate amount of torque. We suggest using servos
that weigh no more than 0.19 ounces and have a torque rating of no less than 7.0 ounces per square inch.
What Receiver Do I Use?
The receiver should be as light as possible, preferably 1/2oz. or less. Most four-channel micro receivers will be a good
choice. If you plan on using the Hitec 555 Micro receiver or the HAS-3MB included with the Focus 3 radio system, we
suggest removing the case to reduce the receiver's weight. If you do remove the case from your receiver we strongly
suggest wrapping the receiver with heat-shrink material to protect the internal components.
What Electronic Speed Control Do I Use?
The ESC you choose should be capable of handling 5 amps continuous current. Again, lighter is better. Your ESC should
weigh no more than 1/2 ounce including the wiring and switch.
What Flight Battery Do I Use?
For the best flight performance the flight battery used should be a 6 cell 2/3AA 270Mah NiCD or a 6 cell 5/4AAA 650Mah
NiMH. NiMH batteries don't give quite as much power, but, more importantly, they are lighter and give significantly
more flight time. We do not suggest using 7 or 8 cell flight batteries because the airplane will be heavier and may not fly
quite as well. The trade-off is not worth the minor added performance.
IMPORTANT
The part numbers listed for the Cirrus receiver, Cirrus servos and Wattage ESC are compatible with Hitec and JR (receiver
is compatible with Hitec and Futaba only) radio control systems. These items are also available with connectors that are
compatible with Futaba and Airtronics radio control systems. (MRX-4 receiver is also available for Airtronics and JR
radio systems.)
When you purchase the Cirrus MRX-4 receiver, you must also purchase a Hitec brand crystal compatible with the
receiver. The crystal must also be on the same frequency as your transmitter. Note that the Cirrus MRX-4 receiver uses
a single conversion FM Hitec crystal. A dual conversion crystal will not work with it.
Flight Battery Warning
To ensure extended battery life and the best
performance from your flight battery, the
flight battery should be charged at no more
than 1 amp. Always allow the battery to
cool before recharging. Never charge the
flight battery when it's hot.
