Peter Drake wrote: > Pete > I am looking at using a pushrod for my elevator control. It is about 78" > long. > I can get carbon fibre tube 29.3mm od. > Do you think that would be suitable or might I get away with a smaller > diameter? > Would the end connections made of steel tube inserts riveted on, with a > threaded hole to take a rod end be suitable? > The weight saving over T45 or 4130 would be significant. > Hi Peter
30mm CF tube looks exactly right, of course you have got to convince the PFA... I would make the end fittings of machined ally, bolted thru with 2 x 3/16 diam bolts and then rose joints threaded into the ally. Best thing would be do a quick free hand drg and send it in to PFA Eng and see what they say. They will of course want a pretty drg before they approve it. Pete
