Moderators: richierich, ua900, PanAm_DC10, hOMSaR

 
stanvalkje
Topic Author
Posts: 1
Joined: Mon Mar 29, 2021 9:50 am

Factor safety used in E170 wing

Mon Mar 29, 2021 10:00 am

Hello, I'm quite new to aviation and I need some information for an assignment I am making. I need to do some calculations with forces on the wing of an E170. Does anyone know what safety factor is used for the materials in an E170 wing. A general factor of safety used in other small commercial jetliners will also do. Thanks!
 
extender
Posts: 793
Joined: Thu Oct 18, 2007 2:52 am

Re: Factor safety used in E170 wing

Mon Mar 29, 2021 1:03 pm

§ 25.303 Factor of safety.

Unless otherwise specified, a factor of safety of 1.5 must be applied to the prescribed limit load which are considered external loads on the structure. When a loading condition is prescribed in terms of ultimate loads, a factor of safety need not be applied unless otherwise specified.


Look in 14 CFR Part 25, Subpart C.
 
User avatar
Starlionblue
Posts: 20595
Joined: Fri Feb 27, 2004 9:54 pm

Re: Factor safety used in E170 wing

Mon Mar 29, 2021 1:45 pm

As a general rule structures have a minimum 50% safety factor beyond the load limit.

The design load limits for a transport category aircraft are +2.5G/-1G clean, +2G/0G dirty.

- Beyond load limits, permanent deformation may occur.
- Ultimate load is limit load x1.5.
- Beyond ultimate load, the structure may fail.


As referenced by extender, https://www.law.cornell.edu/cfr/text/14 ... /subpart-C
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo

Who is online

Users browsing this forum: zknzf and 15 guests

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos