Thanks for pointing that section out.
The OEM process does call out for a bake after stripping; however, the note under Section 4.5.1 of MIL-STD-871B states that steel stripped with Solutions 5 or 6 do not require baking afterwards. It would be interesting to know if the bake called out in the...
Hi all,
I am looking at two processes specified for electro-chemical stripping of chrome plating from steel parts. One is from the parts OEM and the other is per MIL-STD-871.
The two processes are very similar, except that the OEM uses a solution of sodium carbonate 6.5 oz/gal, while...
Hello, I am looking for a non-magnetic (stainless steel) substitute for a LN9037 metric bolt. This a German Aerospace specification, steel, hex head bolt used on many European aircraft (Diamond, Grob, Extra...).
For North American aircraft, the situation would be replacing an AN3 steel bolt...
rb1957, I know the drawing have much to be desired, but I didn't think they're that bad. There are three beam configurations represented there (the long rectangles). The triangles represent the pinned connections (the pin is at the vertex of the triangle). Also you're making assumptions about...
Ok, I've attached a poor sketch to illustrate the problem.
The construction of the beam is irrelavent at this point, because I'm working out the loads on the pin so that I can properly size it.
The poor sketch shows three beams. The first beam has the pinned supports at the NA. The second...
Yes, axial load due to the offset from the NA... that is a better description of the "horizontal shear".
Thanks civilperson, that is what I was looking to confirm.
Hello everyone,
I'm looking at the design of beam that is pinned-pinned beam with a uniform load distribution.
The beam is built-up from a thin web with two extrusions fastened to the upper and lower edges of the web to form the beam caps.
The beam will be assembled to the rest of the...
jetmaker,
I understand your point about most aerospace matallic materials being "ultimate critical". If you were to design for no yielding at limit loads with a SCF=3 around a bolt hole, then you will find out very quickly that the this would be the critical design case... since SCF > 1.5...
Thanks for the quick reply. That answer hit the nail right on the head. I agree that sizing to limit*kt is ultra conservative. I just needed to clear that up with a sound second opinion.
Hello all,
It is well known that the stress concentration factor at a hole in a tension coupon can reach 3 times the average stress, while the stresses are still within the linear elastic range for the material.
When the material begins to plastically deform, then the stress field begins to...
The +/-90 degrees surface angle is often used in the specification of instrumentation to measure control surface positions.
The measurements are used for flight control computers and flight data recorders.
Although the measurement resolution is reduced, a good instrumentation system covers a...
Thanks for your help guys!
I'm working with 2D drawings, and the only way I was able to get moments of inertia was to make a 3D model from them, and do massprops...
however, now that IFRs showed me the missing "region" step, I'm all set!
THANKS!!!
Hello everyone,
I have been asked to try and find coordinates for the airfoil subject above. I have found many versions of the FX-66 airfoil, but I cannot locate anything about the H159 variant. If anyone has any information about this airfoil, or knows where I can find it, please let me...
