Curtiss JN-4D, Инструкция по эксплуатации

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Curtiss JN ‐ 4D ʺ Jenny ʺ 41.25 ʺ Page 7
Copyright© 2005 ‐ 11 M.K. Bengtson All Rights Reserved Rev 07/11
FINAL ASSEMBLY
This model is designed to be easy to assemble. Assembly
starts with the model inverted. Block up the center
section of the top wing 3/8” upside down. This supports
the dihedral. Holding the fuselage upside down fit the
cabane struts into the four holes in the center section of
top wing. Blocking up the tail post the appropriate
amount helps to hold everything in place. Make sure the
fuselage sides are square to the wing center section.
Measure (triangulate) from the tail post to the wing tip on
both sides to make sure both are equal. When satisfied,
put epoxy in the cabane strut holes, re ‐ measure and let
epoxy cure.
Leave everything in place. Trial fit the interplane struts
and wing locating dowels on the bottom wings. Do the
tail post measurements on the bottom wings also. When
satisfied, epoxy together.
The builder of this model added another step to check for
accuracy. He made three fixtures to assure correct
incidence on the wings. These fixtures were drawn right
off the plans. Two were taped to the fuselage to assure
the top wing incidence and another used to assure correct
wing to wing distance when gluing the interplane struts.
Checking for Accuracy
Checking for Accuracy
Turn the plane over and set on the table on its wheels. Use
the same blocking for the tail post to raise the tail section.
Trial fit the horizontal stabilizer/elevator (hinge the
elevators in your favourite manner ‐ if you haven’t already
done so). Make sure the leading edge of the stabilizer is
parallel to the wings. Measure from the wing tips to the
same place on the stabilizer tips. Triangulate. Should be
equal on both sides. Manicure the fuselage saddle/tail
post if necessary to achieve a parallel. Adding material is
better than taking away in this area. Epoxy when satisfied.
Checking for Accuracy
The vertical stabilizer/rudder is epoxied onto the top of
the horizontal stabilizer with S1 fitting in the slot in E9.
Use a square ‐‐‐ the vertical stab/rudder must be 90 degrees
to horizontal stab and wings. Check to make sure the
rudder does not interfere with the full movement of the
elevator joiner, before final gluing. Slip the control horns
onto the wire pushrod ends and, with both the servos and
the control surfaces centred, glue the horns into their slots.
Battery Tray
After all the above has been placed, mount the battery
tray made from 1/8” balsa and use the battery position to
balance the model as shown on the plan.
After the top wing is attached, the lower wings are added.
Apply epoxy to the wing rib that meets the fuselage.
Attach the wings to the fuselage. Use the locating dowels
to assist with aligning the wing panels. Epoxy in the
interplane struts at this time. Allow epoxy to set.
Fitting the guy wires.
Use strong thread or Kevlar fishing line or elastic beading
cording to simulate rigging wires. Use small screws,
fishing hook eyes, straight pinheads or small eyelets to
attach the lines. While not technically required these
wires can add a degree of strength to your model.