Bend allowance and bend radius all the space between the band tangent lines is the.
Aircraft sheet metal numbering system.
Base measurement is the outside dimensions of a formed part.
How bend calculations are used in a bending operation.
Forming at room temperature is known as cold forming.
Various numbering systems are used to facilitate the location of specific wing frames fuselage bulkheads or any other structural members on an aircraft.
To locate structures to the right or left of the center line of an aircraft a similar method is employed.
Aluminum lithium alloys were developed for reducing weight in aircraft and aerospace structures.
The tools required for this type aircraft are minimal.
To determine the bend allowance for a 90 bend simply use the top number in the chart.
Aircraft hardware is discussed in detail in the structural hardware manual navair 01 1a 8.
Natural grain of the material is formed as the sheet is rolled from molten ingot.
Forming sheet metal requires a variety of tools and equipment both powered and manual.
Aircraft hardware is usually identified by its specification number or trade name.
Any bend formed on a.
The third digit the sheet type is a number that represents the type of drawings that are on the sheet plans sections details schedules etc.
The terms are used in sheet metal forming and flat pattern layout.
Flange is the shorter part of a formed angle.
The final two digits the sequence numbers are numbers that simply place the sheets in order.
Department of transportation federal aviation administration 800 independence avenue sw washington dc 20591 866 tell faa 866 835 5322.
Other aircraft kits use regular structural rivets that must be squeezed or driven.
Center punch the rivet then drill just to the base of the rivet head with the same size or one size smaller drill.
Manufacturers use some system of station marking.
Some sheet metal aircraft utilize construction techniques that use nothing but pop rivets that are pulled using a small inexpensive rivet tool.
Aircraft technician relies on a wide variety of powered and hand operated tools to precisely bend and fold sheet metal to achieve the perfect shape.
Once drilled use a pin punch to tip off the rivet head and drive the remaining shank out of the hole while supporting the surrounding metal.
Types of shrinking and stretching tools used for aircraft metal structural repair.
The upper number in each cell is the bend allowance for a 90 bend.
As mentioned above the unified numbering system for metals and alloys uns was developed by astm and sae in an effort to clear up the alphabet soup problem.
Efficient operation of any aircraft is greatly dependent upon correct selection and use of aircraft structural hardware and seals.
