Bristol F2B Fighter ARF 13
Stabilizer fits
in here
Fixed screw
supports
Adjustment screw
Fixed screw
supports
Adjustable
leading edge
support
Balancing
Check the C/G and make adjustments if
necessary. C/G should be within the range of 9
cm - 12 cm (3.6" - 4.8") measured from the
leading edge on the upper wing. The further
forward you put the C/G the more "groovy" the
model behaves. This model has a relatively long
nose moment and depending on what engine
you are using, wheight may be moved towards
the rear of the plane. The original aircraft had to
have observer or balance weight in the rear
cockpit or else it was nose heavy and dangerous
to fly
Stabilizer trim
In the bottom of the fuselage at the position
of the stabilizer leading edge there are two 3 mm
screws.
Initial setting should be 2° positive
related to the thrust line (approx. 3 mm down
from the top end position). By turning these
screws, the leading edge of the stabilizer can
be moved up or down (clockwise = down). To
change the setting, remove the clevises for the
support wires at the leading edge of the stabilizer.
Turn both adjustment screws the same number
of full turns. Turn the wire holder in the fins
accordingly, same number of full turns. If you
move the leading edge up, the upper and lower
wire attachment points are moved upwards. Clip
the clevises back into positions. If you find that
your elevator trim requires a changed stabilizer
setting, execute this trim and move your trans-
mitter trim tab to neutral for the next flight.
Flying
The prototype was flown with a 1.20
(20cc) OS FS 4-stroke engine. We used a
custom built muffler allowing the exhaust to be
emitted through the scale manifold.
Flying characteristics are very forgiving
and will fly happily on half trottle. During the initial
take off run you have to compensate for the
torque with right rudder but as the speed builds
up the rudder is returned to neutral. This model
should fly of the ground and not be pulled. Once
airborne the aircraft is limited aerobatic like all
biplanes from WW I. Turns must be coordinated
rudder/elevator/aileron in prototype fashion.
The landing approach can be rather
steep as per prototype but the flare out needs
almost full up elevator. Get the tail down to
maintain directional stability.
If your enginge quits midair, remember to
get the nose down to maintain flying speed. The
drag from the wires and struts is considerable!
Happy landings!
Summary of Contents for Bristol F2-B 1917 Fighter
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