Airplane Sheet Metal Circular Patch Template

So i will draw a line 1 4 from the small hole and inward from the outline of the patch i drew.

Airplane sheet metal circular patch template.

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. When repair of a damaged part is possible first study the part carefully to fully understand its purpose or function. 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. The two main qualities that all of the highly skilled sheet metal workers i have worked with possess are knowledge and patience.

This is a very common problem on sheet metal airplanes. A rounded or several sided patch is preferable over a square patch. Basic principles of sheet metal repair. Bending sheet metal by hand is a manageable task if the piece of sheet metal is small and thin enough to handle.

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 used a piece of pvc pipe a vice mount miniature metal break and body hammer kit. Another excellent source is aircraft sheet metal published by jeppesen. Make a template using paper.

Airplane airplane materials and construction. The primary objective of aircraft repair is to restore damaged parts to their original condition. Learn how to bend sheet metal so you. Keep the weight to a minimum prem mahendranathan.

The patch plate should have a cross sectional area equal to or. You will often find a crack developing in an area such as an engine cowling. The reader should be familiar working with sheet metal and riveting. Most frequently expensive sheet metal bending tools called brakes are used to bend sheet metal but you can also complete this task without one.

Cutout the corners into oval or circular shape. Select the appropriate material. For reasons of availability low weight and prior manufacturing experience most early aircraft were of wood and fabric construction. Knowledge comes from learning all of the factors that affect good.

I then used the templates to trace out the patch panels on some sheet metal. Maintain the original strength. Maintain the original strength. Use advisory circular ac43 13 1b as a reference to determine proper rivet layout for the patch.