How can you tell from the picture they weren't in bending? maybe you can make a case for the lower one where i would guess too little thread was attached, but the rocker one i had no doubt it carried bending load. </div></BLOCKQUOTE>Originally posted by M. Nader:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by atm92484:
Except none of those rod-ends are in bending...
It wouldn't surprise me if there was more to the story than the picture is telling.
From the picture it looks like the rod end which failed at the bellcrank is a pushrod, which should only be in compression (2 pin connections). The lower one looks like it would be a tie-rod, which is also a tension/compression member.
My guess would be that the "awkward geometry" caused some kind of binding to occur, putting those rod ends into unexpected bending. Nevertheless, this is a good example of how rod ends will fail, however strange the situation.