文档介绍：Standard Methods and Practises
26/06/98
Please read the following information carefully and refer to it often throughout the building process. It
contains information on corrosion protection, drilling, deburring, gusset building etc. Also included is a
section on bolt and rivet selection to assist you in areas of the manual where bolt or rivet sizes have not
been indicated.
Metal Surface Preparation
Some of our kits include the following chemicals to be used for surface preparation and treatment:
C-2200 MET-L-SOL Surface Cleaner
EP-420 Epoxy Chromate Metal Primer
EP-430 Epoxy Primer Catalyst
As a protective measure against corrosion, mating metal surfaces should be fully deburred, cleaned with C-2200,
then coated liberally with epoxy chromate primer. This provides a seal between the surfaces to prevent corrosion
and moisture buildup. It is a good practice to coat the end of the rivet on the inside surface after installation.
As an optional measure, the rivets can be dipped in chromate prior to installation. This provides protection inside
the hole and seals out moisture. If the airframe is not to be painted be careful to avoid excess chromate on the
exterior.
The epoxy primer is to be pre-mixed in accordance with the manufacturers directions as displayed on the
containers. It is advisable to mix only the amount you need in a small container each time you work, however,
larger amounts can be mixed and reused in a sealable container.
Drilling Holes
It is good practice to use a #40 drill when doing any assembly- if possible never drill to final hole size
until assembly plete. This allows for any movement between parts or adjustment you may want to
make that may cause misalignment of the holes during assembly.
Always use a sharp drill bit as:
-A sharp bit will not wander as easily as a dull one.
-You can drill faster with a sharp bit.
-You don’t have to push as hard, risking bending flanges etc.
-Always be careful to drill