Curtiss JN-4D, Инструкция по эксплуатации

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Curtiss JN ‐ 4D ʺ Jenny ʺ 41.25 ʺ Page 8
Copyright© 2005 ‐ 11 M.K. Bengtson All Rights Reserved Rev 07/11
Battery hatch
Fashion a battery hatch from 1/32” ply.
Motor and gearbox tips.
The mini ‐ Olympus gearbox is very durable and reliable
but it does have a few weak points.
1. There is often flashing on the gears making rough
spots or binding which robs power. Take a sharp
Exacto knife and remove this until your gearbox turns
smoothly.
2. Excess flashing also occurs where the motor is
mounted that makes alignment poor and again robs
power. Take the Exacto and carve away this excess
until the motor fits easily.
3. Loose setscrews on the main shaft and motor let
power slip away. Tighten all these set screws
carefully. TOO MUCH will distort the pinion gear
and makes another binding. CA the pinion on the
motor shaft if necessary. Recheck this after a nose
over with power on.
This model needs an 8 ‐ inch prop for ground clearance. To
get enough power, 8 cells are a must. Use an 8x4 prop for
maximum static thrust, as the model has to fly slowly. It
will not be a fast model. Neither was the Jenny a fast
airplane.
Balancing the Model
Balance the model at the point shown. It is best to
position the battery to do this operation.
FLYING
The model should ROG on pavement or hard surfaces.
On grass, the model may require hand launching. Be
careful that your hand or fingers do not catch on the lower
rigging. Launch firmly and level.
The tail surfaces should not need excessive throws. Let
the model gain altitude slowly off the runway. Applying
too much up elevator at slow speeds risks a stall. Make
your turns gently as tight turns risk tip stalling in any
model. Don’t expect the elevator to make the model
climb. Think of the elevator as a device to change the
attitude of the model. The wing and airspeed ultimately
make the model climb. Often down elevator applied at
stalling can avoid a major crash. The most important
details for proper flight operations are:
1. CG location. Tail ‐ heavy models never fly well or at
all.
2. Down and right thrust.
3. Straight and non ‐ warped wings.
CONGRADULATIONS, YOU HAVE BUILT
A BEAUTIFUL CURTISS JENNY !
CONTACT INFORMATION
Distributed by:
Bengtson Company
e ‐ mail: sales@aerodromerc.com
Web Site: www.aerodromerc.com