Carf-Models EXTRA 330SC Building Instruction page 2

This list will help you chose the main additional items needed to finish your Composite ARF Extra
330SC 2.3m
Some of the recommendations are strongly recommended and some easily chosen by you. The
items we list here are highly recommended by C-ARF, and have been tested on various prototype
aircraft used during the development of this aeroplane.
1. Servos (minimum 6 high quality servos) All the main control surfaces require a minimum
15kg digital servo such as the JR 8511/8711 metal geared servos. The prototype models used
JR 8711 or MT80 Brushless 25kg servos. CARF would recommend servos over 20kg torque on
the main controls.
2. Heavy duty servo metal servo arms are recommended, most servo manufacturers either
offer arms like the JR items shown, or there are several after-market items available
including the SWB items.
3. A receiver power supply system like the excellent Powerbox units is recommended, using
two separate batteries through separate regulators. A 50-60cc model like this requires a
regulator capacity above 10A.
4. Powerunit. The Extra 330SC was primarily designed around the Desert Aircraft DA 60R petrol
engine. The motor dome design is based on the DA-60R backplate and the four fixing points
are factory fitted with T nuts. The motor dome will still allow various other engines to be
installed with minor modifications to the mounting plate, but we strongly recommend the
DA 60 for reliability and power. A mini pipe #910080 TD75 Canister set and full pipe option
#910090 RE2 Tuned Pipe set have been designed around the DA 60 Extra 330/Edge 540 2.3
making installation straight forward. There is limited space under the wing tube, so any
system chosen All items are available from CARF. An in cowl Pitts style muffler would be
another option, if available for your chosen engine.
5. The Extra 330SC cowling fixings have been factory completed, with captive nuts installed in
the motor dome and holes drilled in the cowling halves, all reduce assembly time. The motor
box design will allow various muffler options to be installed. We recommend our MTW
muffler sets. Space under the wing spar tube is restricted, so if you go your own route check
for clearance first.
6. A purpose produced composite, aluminium backed spinner is available from CARF-
models.com part No 811100 is white, 811101 is Red, 811102 is Yellow, 811103 is Silver.
7. Fuel Tank. You will require a fuel tank suitable for petrol, we use a Dubro tank between 750
and 950cc (24-32oz). Use Tygon yellow tubing for all fuel connections.
8. A radio system with a minimum of 6 channels is needed, but C-ARF recommend using a
quality radio system with mixing options allowing the very best to be gained from your Extra
300SC. (talk to your C-ARF rep for advice on a suitable system)
9. High quality extension leads are required and a guide to the sizes and quantities required are
listed below.
10. Quality 102-104mm wheels are required, we recommend Dubro or Sullivan Skylite.
11. Light weight Tail Wheel assembly, like 801000 available from CARF-Models is required.
EXTRA 330SC 2.3m
Accessories
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