Originally Posted by rv9builder
What's the advantage of the pipe coupling over the socket? Was there a thread about this on VAF? I must have missed it.
Good question, and not something I recall now or could answer clearly...at least with respect to the actual squeeze. I'm not sure if I saw it on VAF but it popped up on a couple of the popular blogs or build sites. Maybe it's just a case of monkey-see-monkey-do. I did find that when I used the socket recommended in the KAI it took quite a bit of force to get very little deflection. Larger sockets were a little better. I think the coupling is just a good sweet spot in terms of diameter and length and for me it did seem to flare a little easier when doing trial runs.
As far as the coupling goes, there are different styles of coupling. It seems obvious, but worth mentioning that you want the type that is just smooth around the outside. I think that these are typically stainless steel, mine was.
I do know that at least in this application, I'd rather keep sockets in the socket drawer for their intended use and 'sacrifice' a coupling. Once the job was done it took just a few seconds with a grinder to remove and it was left a little messy. I tossed it in with the misc. airplane tools so I'll have it for the next build.