Airplane Sheet Metal Circular Patch Template

Maintain the original strength.

Airplane sheet metal circular patch template.

A rounded or several sided patch is preferable over a square patch. Airplane airplane materials and construction. For reasons of availability low weight and prior manufacturing experience most early aircraft were of wood and fabric construction. Cut out a circular patch from a sheet of aluminum that is the same thickness and the original aircraft skin.

Select the appropriate material. Keep the weight to a minimum prem mahendranathan. Maintain the original strength. Learn how to bend sheet metal so you.

The reader should be familiar working with sheet metal and riveting. The two main qualities that all of the highly skilled sheet metal workers i have worked with possess are knowledge and patience. Another excellent source is aircraft sheet metal published by jeppesen. Make a template using paper.

Most frequently expensive sheet metal bending tools called brakes are used to bend sheet metal but you can also complete this task without one. So i will draw a line 1 4 from the small hole and inward from the outline of the patch i drew. The patch plate should have a cross sectional area equal to or. Basic principles of sheet metal repair.

Cutout the corners into oval or circular shape. I used a piece of pvc pipe a vice mount miniature metal break and body hammer kit. If you re not sure how to approach a repair get the assistance of a qualified aviation sheet metal mechanic. This is a very common problem on sheet metal airplanes.

Use advisory circular ac43 13 1b as a reference to determine proper rivet layout for the patch. After slicing the patches out with a cutoff wheel next came the bending hammer and dolly session until the patches matched the holes and fit snug and flush into the flanged seat. I then used the templates to trace out the patch panels on some sheet metal. In all cases your primary reference for all repairs is faa advisory circular 43 13 1b acceptable methods techniques and practices aircraft inspection and repair.

Knowledge comes from learning all of the factors that affect good. You will often find a crack developing in an area such as an engine cowling. At the lower speeds then obtainable streamlining was not a primary consideration and many wires struts braces and other devices were used to provide the necessary structural strength. Principal requirements in repair of structures inspection of the damage and accurate estimate of the type of repair required important steps in repairing structural damage.