Here’s the fuselage with all of
the stringers in place and the tail
loosely fitted. Next on the punch list
are wings and retracts.
Free the hatch by cutting between the doubled formers with a sharp
blade or razor saw.
The front pin is in place and the rear magnets are ready for epoxy.
Click here for
the free plans.
until the hatch can be removed.
A combination of a pin in the front
and magnets in the back is a nice way
to hold the hatch in place. The pin will
keep the front from lifting in flight while
two pairs of rare-earth magnets, available
from K&J Magnetics, allow the hatch to
be snapped on and off. The pin can be
a bit of wire or dowel. Strong, but tiny,
rare-earth magnets are available in many
shapes and sizes at your hobby shop
or online. Two pairs of 1/16 x 1/8-inch
diameter magnets were used on the Bf
With the hatch framework in place,
drill a hole through the plywood front
former and into the front of the hatch
for the pin. Now drill holes through the
hatch and fuselage rails for the magnets.
Drilling guide holes in the rails before
the stringers go in makes it easier to
align the magnet holes later.
Use your choice of glue to hold the
pin into place in the front of the hatch. I
Now drop the
magnets into place
in the lower rails.
paper will keep
the magnets from
and prevent the
rails from sticking
to one another.
This method will
also ensure that
the polarity of
the magnets is
is not cause for
the hatch into
should slip into
their holes in the
hatch rails. Clamp
the hatch into
position and brush a little epoxy over
the exposed faces of the magnets and
the surrounding areas in the rails. After
the epoxy is cured, the hatch should
easily pop on and off.
It’s been great to hear from builders
who downloaded the free Miles M. 20
plans last year. So far, the only complaint
has been from a few builders who found
that the short kit parts didn’t quite fit
the plans because they had printed them
at the wrong scale.
If you decide to download and print
either of these plans, please make
sure to print at 100% scale. You can
double-check the scaling of the print by
measuring the 4-inch rulers in the lower
left corner of the plans.
See you next month when we frame
up the Bf 109’s wing and install the
RetroRC (45-inch Bf- 109 short kit)
Manzano Laser Works (30-inch Bf- 109 short kit)
Robart Manufacturing, Inc.
K&J Magnetics, Inc.
50 Model Aviation SEP TEMBER 2016