fuselage structure
 

i'm designing the fuselage for a biz jet as an undergraduate project. i need to know how, generaly, the inner skin is attached to the frames and stringers supporting the outer skin.
also i would like to know how the internal pannels are attached to the inner skin (glue, riveted etc).
this may seem like an obvious question, and it must be, as its not writtern down anywhere!?!. any help most welcome.

To allow access to the primary structure (that is the ribs and inner surface of the outer skin) generally it will be fastened using some form of fastener which can be released from one side. Most commonly what are known as "dzus" fasteners. If you give a company called "light aero spares" a call on 01409-281578 and ask for a free catalogue, that lists the types available and gives limited design data. Also used are "camloc" fasteners, which are also shown in the light aero catalogue.

But, all sorts of things may also happen, including glued, pop-rivetted or bolted. However, the Dzus fasteners are most common.

In a business jet, you can almost always expect a lot of soundproofing blanket also; either between the inner and outer skins, or clipped inside the inner skin using grown up versions of the same sort of clips used in car trim.

If you want to find a company who do this, there's a CAA publication called "CAP 475" which lists all companies approved to work on aircraft, which will include trim.

Hope this helps,

G

cheers Genghis!