This shows the forward end of the slider. The
plug will be shaped after the unit is mounted
and the forward leadout position is accurately
A view of the front of the assembled slider
shows the clip on the release pin.
vertically after determining the appropriate
location on the carbon-fiber shaft.
The slot was widened with the cutting
wheel and I fashioned a balsa plug to
help hold the channel. The plugs in
the end of the carbon-fiber shaft are
necessary to maintain the rigidity of the
tube after it is slotted.
The release pin is fashioned from
1/16-inch brass rod and 0.024-inch music
wire, as shown in the photos. The pin is
attached to the up leadout with a piece
of control line cable. I drilled a 5/64-inch
hole through the channel and slide after
the unit was assembled. That method
ensures proper alignment of the holes.
The slide moves aft because of the
position of the bellcrank at the rear of
the balance point of the model. I usually
mount the bellcrank pivot between
40% and 50% behind the leading edge
of the wing. In that location, I have not
had a need for a formal retainer at the
aft end of the slide travel. The magnet
is additional insurance and provides
slightly more than 5 ounces of retention
force. It helps ensure that the slide will
remain in the fully deployed position if
the model starts oscillating because of
turbulence or poor pilot technique.
The result is shown in the accompanying
photos. The total weight of the unit is
less than 1/2 ounce ( 13 grams).
I rigged the slider to release with
down-elevator, and I deploy it after I
slow the model following high-speed
flight. I set up the controls so that the
upline is the front line. That causes
the elevator to move up during slide
deployment. The change in control
position is barely noticeable to me.
Some Carrier modelers use a cable
with a loop in the end to restrict the
movement of one of the leadouts. It
effectively shortens the affected control
line and reduces the elevator movement
during deployment, if that is a
Navy Carrier Society (NCS)
Master Magnetics, Inc.
126 Model Aviation JULY 2017 www.ModelAviation.com
CONTROL LINE NAVY CARRIER