welding on a main spar
welding on a main spar
(OP)
hey , i am to weld a bracket on a main spar of z-142. what is the material spec on zlin z - 142. what wil the welding rod spec be? .i use tig welding prosses.
thanks danie
thanks danie





RE: welding on a main spar
Welding to a principal structural member such as a main spar sounds pretty dangerous. Is this an OEM-approved mod/repair?
Welding can cause cracking of the spar as well as local deformation.
There are, as you may know, numerous deleterious effects due to welding such as residual stresses, porosity, etc., all of which impact on the strength of the structure.
I doubt whether you will obtain approval for this mod.
Is there no other way of attaching the bracket?
Bear in mind however that even attaching the bracket by means of more conventional means such as rivets must still be subject to thorough engineering input as regards static strength and fatigue aspects. The presence of an additional component such as a bracket could also attract load by stiffening the area locally.
Regards
Andries
RE: welding on a main spar
STF
RE: welding on a main spar
RE: welding on a main spar
RE: welding on a main spar
RE: welding on a main spar
RE: welding on a main spar
Nigel Waterhouse & Associates
Aeronautical Consulting Engineers
Transport Canada and F.A.A approval & certification of fixed and rotor wing aircraft alterations: Structures, Systems, Powerplants and electrical. FAA PMA, TC PDA.
n_a_waterhouse@hotmail.com
RE: welding on a main spar
That type of thinking could get a lot of people killed. Never do anything based upon the concept of "maybe".