X
4
MR
250
MexAir RC
4
b.
Always wear appropriate safely gear or take other precautions during any operation
that could create a hazardous condition – including soldering, drilling, cutting and
grinding.
8.
Carbon fiber is a conductive material. Never allow bare battery terminals or other
powered connections to physically come into contact with the carbon fiber or metal
components of the frame. Contact may create short circuits that may damage
electrical components and/or become a fire hazard. Always insulate powered
terminals from the frame using nonconductive materials such as electrical insulating
tape, heat shrink tubing, or plastic/nylon standoffs or mounts.
9.
NEVER attempt to screw any component into the carbon fiber frame without first
carefully drilling the appropriately sized hole at the fastener location. Self tapping
screw/bolt hole sizes are slightly larger than the inner diameter of the threaded
portion of the fastener. When tightening a self tapping fastener, it may be necessary
to start tightening it, back it out slightly, repeating this process until the fastener is
threaded to the proper depth. This creates a threaded hole that should hold firmly
without any other aid. For added assurance, use the time-tested technique of
“hardening” the laminate core material AFTER you create the threads using the self
tapping fastener. Remove the fastener from the hole and carefully drip 2 – 3 small
drops of thin CA into the hole. The CA will “wick” into the core thread area and harden
the core material. Allow sufficient time (usually only a couple of minutes) for the CA to
completely dry prior to reinserting the fastener. You do not want to glue the fastener
permanently in the hole! Hardening the laminate core material, although not typically
necessary, is only done if you intend to insert a threaded fastener that will be
tightened across the laminated surfaces causing significant compressive forces on the
laminate structure. Hardening reduces “dimpling” the surface when compressed. The
laminate structure is sufficiently strong and some dimpling is not a bad thing – it
actually acts to further reduce the possibility of fasteners loosening. Excessive
tightening is unnecessary.
