Stringer
Light, lengthwise fuselage strips intended more to give the desired shape than to add strength.
Strip Ailerons ...
Stringer: A secondary member of an aeroplane structure, usually running parallel to the mainspars or longerons, which assist in maintaining the external form.
Detail: Load Bearing MountThe weight and torque of the engine are conveyed to the craft's stringer through a transverse steel weldment bolted to the stringers.
The critical structural requirement under these loading conditions is to have adequate "peel" strength between the upper skin and the substructure (ribs and/or stringers etc). Both the N28 and the Dr.I were deficient here.
These frames are then joined with lightweight longitudinal elements called stringers. These are in turn covered with a skin of sheet aluminum, attached by riveting or by bonding with special adhesives.
The canopy tool would make hash out of the fabric and stringers, but often the open areas of the tubing trusses are too small to wiggle through.
Basically, the wing is a framework composed chiefly of spars, ribs, and (possibly) stringers (see figure 1-5). Spars are the main members of the wing. They extend lengthwise of the wing (crosswise of the fuselage).
It then requires more energy to "rip" it out, and the aluminum stringer frame and stressed-skin construction then need much more energy to start to bend, buckle and twist.
Schools might choose to teach Part 61 or Part 91 because of less stringer standards. However, there are more time requirements for Part 61.
 See also: Skin, Structure, Section, Monocoque, Wing
  
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