Despite your previous statement in this very thread that you'd stop beating this drum, here you go again. Did you type this or not (bold in original)?:5. If a builder feels they cannot personally assemble a fuselage using conventional means, they can tack one together and pay someone to finish it. Even a cheap HF will tack, and it requires virtually no skill. The cost of materials for alternative assembly will offset the cost of hiring someone.
Previously, in a thread FritzW started to discuss the automated tube cutter he is designing, you inserted 2 posts and tons of graphics on your Craigslist finds (here and here). Pretty hard to see how that was germane, and the OP let you know that.Sorry for the thread drift Vigilant, nuff said about welding by me. I think you will be better off learning to weld but thats not what you asked, so I'll leave it with what I have already said and hopefully the discussion will return to alternatives.
I ignored him a long time ago, recently I'm finding it the best solution.When three op's have to put a stop to this guys disruptions it's time for the moderators to step in.
The "ignore" list is certainly helpful if you're not getting along with someone, but please report consistent trolling to the moderators. We can't be everywhere, and member reports brought mod attention to this case.I ignored him a long time ago, recently I'm finding it the best solution.
Some might think it's beneath you to do it, and that you can handle them, nah, it's just easier, really cleans the threads up as you browse through them.
Keep in mind that properly designed riveted and bolted joints don't see shear through the fastener. If they do, their fatigue life is drastically smaller. The residual compression forces imparted during installation should be large enough to allow the joined parts to take up all the in-plane and normal forces without ANY additional static or alternating stresses on the fasteners. The practice of designing for shear flows or shear stresses based on fastener shear cross sections is so far wide of the mark of what is actually going on, it is a wonder why it is used as the default structural minimum criterion for joints at all.
I see much design with body-bound press fit fasteners or tapered pin joints ....mainly in wing attach fittings and wing carry through fittings or spar caps....What might be the reasons for that considering your statements......So should I not be concerned if I have a slip-fit wing attach bolt connections vs press-fit wing attach bolts?So few people recognize that friction caused by preloading fasteners is what holds joints from moving and keeps the fasteners from fatiguing. If the joint shifts at all, the fasteners see fatigue and joint is doomed. You could Loctite nuts or not fully set rivets and then the assembly will either break the fasteners or the holes will open up and the joint will fly apart. Just ask your tire shop guys what happens if the nuts are not tightened...
I try to stay away from bolted joints, even in steel, that are dependent on the friction. If the design checks out as critical with only shear I might use 30% of the friction from the clamping loads to see if it then has the needed FOS.I even found one source that suggests slip critical joints aren't usually used in aluminum.
Please please please don't do this. This gives a very real chance of wrecking your wheels and makes possible losing a wheel while driving.Next, replace the tapered nose lug nuts on your car with flat-faced nuts. You can swap one at a time, to keep the wheel centered on the hub. Now, drive it for a week, and report back on your results.
In my case a poor choice of words. "Critical" being under the design point , either yield or ultimate, by 15% or so. In other words close enough to give me a 'warm fuzzy feeling' that using the 30% of the friction from clamping load provides the desired FOS.how do you define "critical" .....perhaps as regards to Ultimate or Ultimate + FOS?
Slip-critical joint, from structural engineering, is a type of bolted structural steel connection which relies on friction between the two connected elements rather than bolt shear or bolt bearing to join two structural elements.how do you define "critical"