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  1. fpm

    Damage and Tarnish on Inco625 parts

    Hi all, My company uses Inconel 625 parts in a water spray nozzle. The nozzle sprays fresh water at around 80-90degC and 50-90psi. pH is pretty neutral. The suspended solids content of the water is less than 5mg/l and dissolved iron is less than 0.5mg/l. Our problem is that we have had...
  2. fpm

    Aspect ratio of multi-element wing?

    Hi, I've had great help on here before, so I hope you guys can maybe help me out this time too! Its a simple question: I know how to calculate the aspect ratio of a simple rectangular wing, but how do I do it if the 'wing' consists of more than one element? Is it (AR1+AR2+AR3)/something??, or...
  3. fpm

    Custom SS extrusions

    Hi, I'm trying to find a company that can do custom stainless steel extrusions. Extrusion will be roughly 300mm x 300mm, and needs to be capable of being produced up to 7 or 8 metres long. In x-section, its roughly a hollow square with another hollow rectangle inside. Is such a thing possible do...
  4. fpm

    Help on lift and drag coeff calculations please....

    Hi guys, I hope you can help me, I've got 3 questions (a bit greedy I know...) I'm researhing into simple wing designs, and have come up with the following queries, I intend to run some CFD on some designs, but I want to have a feel for the numbers I should be seeing, rather than just blindly...
  5. fpm

    254 SMO Vs 4565

    Hi all, My company produces a product, parts of which are made from 254 SMO rather than 316, when extra high corrosion resistance is required. We are experiencing periodic difficulties in getting our hands on 254SMO plate, and I want to investigate the potential to use another material. I've...
  6. fpm

    Who can machine 5m+ of Alu7075?

    Hi I hope this is the right place to put this... I'm looking for a vendor who can provide me with a roughly 5 metre long section of 7075 T6 or T7. The cross section is roughly square, but one side is pointed, giving a 'triangle on top of a square' shape. Its about 40mm by 20 mm. Does anyone out...
  7. fpm

    7075-T6 Vs 7075-T7x

    Hi all, I'm currently researching a suitable material for a component I'm designing. I've pretty much settled on 7075 aluminium, but I'm now seemingly faced with the choice between T6 or T73/T76. From what I can see, the T73/76 offers better resistance to SCC than the T6, but at a price of a...
  8. fpm

    Industrial rollers

    Hi there. I'm trying to put together a type of trolley that is to run on top of 2 large diameter rolls (approx 1 metre). I need to find industrial rollers that will be strong enough to take a weight of a tonne or more,and are made with, or at least covered with, preferably a plastic of some...
  9. fpm

    Locknut use?

    I have an application where a component is positioned using a nut tightened onto a threaded rod. The rod, which is prt of the component, passes through a plate,and the component is positioned vertically via the position of the nut on the threaded rod. The application is prone to high ambient...

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