Composite-ARF BAE Hawk, Инструкция по эксплуатации

Страница: 8 / 32

B.A.E. HAWK
www.carf-models.com
the position.
Access to the two front mounting screws (2.2 x 10mm) is improved if you drill two access
holes in the rear wing seating area. Holes drilled at 170mm centres approx and 10mm
in from the rear edge of the wing. The tail pipe front brackets should be screwed directly
to the turbine mounting rails. Be sure to centralise the carbon bell mouth between the
rails as the deflector duct fits outside of the carbon bell mouth.
Turbine Installation
Mounting the turbine is very straight forward on the Hawk, with excellent access to the
turbine through the wing opening. Mount the turbine directly on the bearers, higher
power turbines benefit from being mounted slightly higher in the fuselage. To achieve
this the motor mount could be fixed below the rails (when looking through the wing
opening)
Modern electric start turbines remove the need for
engine access hatches, as the operator does not need
to attach or detach anything from the turbine during
starting.
We recommend a turbine of 12-16kg thrust, the three
prototype aeroplanes have been flown with JetCat
P120SX and P160SX turbines.
Any turbine between 22 and 35lb thrust will give
adequate performance to the Hawk. For less
experienced pilots we recommend turbines over 35lb
thrust have the maximum RPM reduced to limit output.
IMPORTANT SAFETY INFORMATION. The Hawk is
designed for a maximum turbine thrust of 16kg-This
must not be exceeded. All installation pictures show a
JetCat P120SX, , which give more than scale
performance including huge vertical elements.
Many of the turbines available now feature off-set
mounts. The exact position of the turbine will affect the
thrust tubes vertical position, which can affect the
Hawk’s trim. On very early kits the elevator servo
plate is mounted 10mm lower in the fuselage,
requiring a small dent placing in the outer cool tube to
allow clearance for the correct bellmouth height. On
the prototype model 8mm of packing was required.
The exact position of the turbine fore and aft will
depend on your chosen turbine. With the JetCat
turbines we recommend a distance of 25mm between
the back of the turbines tail cone and the carbon
bellmouth/stainless tube joint. This relates to the front
8
Fig 6
Fig 5
Fig 4