Composite-ARF BAE Hawk Instruction Manual page 5

ACCESSORIES
This list will help you chose the main additional items needed to finish your Composite
ARF BAE Hawk.
Some of the recommendations are mandatory and some can be sourced and 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 8 high quality servos) All the main control surfaces require a
minimum 11kg digital servo (two matched servos for the elevator control) such as
the Gr/JR 8411/8711 metal geared servos. All the prototype Hawk models used
JR 8711 servos.
2. Heavy duty servo arms are recommended, for the JR servos we used JR part
JRPA215 or Graupner #Nr 3544. Two packets required.
3. A receiver power supply system like the excellent Powerbox units are
recommended using two separate batteries through separate regulators. The Hawk
requires some weight in the nose area, so the additional batteries all help.
4. Turbine set. Turbines in the 10-16kg (20-36lb) thrust range have been used in the
prototype aeroplanes. Turbines in the 16kg (36lb) 160N thrust class should be
seen as the maximum thrust for the aeroplane and should not be exceeded. Ideally
a 160N turbine should be turned down in RPM 5%. Comp ARF display aeroplanes
use JetCat turbines.
5. Retractable Landing Gear sets are available from Composite-ARF in sport and
scale sets (C-ARF product #200500-Sport) and (#200600-Scale). The Hawk was
designed specifically around the German manufactured AT high quality sets that
include three units, plus specifically manufactured trailing link legs with associated
ball raced wheels and high quality brake units. If you chose the sports scale gear
to start with you can upgrade at a later date using scale upgrade set (C-ARF
product #200650)
6. Landing Gear support equipment is available from Composite-ARF (#200550), or
can be sourced by you. The Hawk requires a minimum of three air rams to operate
the gear doors (four with a scale nose gear door set up). The retract valve chosen
needs to operate air up/down units and a suitable method of controlling the gear
door opening sequence. The Hawk has the gear doors stay open when the landing
gear is in the down position. C-ARF set features high quality parts including air
valves from Jet Tronic to control the gear and door opening, plus brakes. Suitable
air tubing and a large capacity air tank for landing gear/door operation. Filler
valves and quick disconnect joiners. We strongly recommend you use this proven
high quality set.
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