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  1. Tatonka

    misunderstood valve specifications.

    the company i work for does contract engineering work through GSA...we don't supply parts, so we don't have a contracting officer...i'll try to find one, though...
  2. Tatonka

    misunderstood valve specifications.

    The only way I can access the spec is through the "Viewer" program on an Army terminal. It has images of each page and you have to print them individually...great use of time, eh? our tax dollars hard at work...
  3. Tatonka

    misunderstood valve specifications.

    sorry it took me so long to get back to you...spec number is 10237-3102 for part 12283102 - Servomechanism, Elevation.
  4. Tatonka

    misunderstood valve specifications.

    sorry it took me so long to get back to you...spec number is 10237-3102 for part 12283102 - Servomechanism, Elevation.
  5. Tatonka

    misunderstood valve specifications.

    sorry...didn't preview... lbf psi = ---- in^2 lbf 1 lbf psi/in^3 = ---- x ---- = ---- in^2 in^3 in^5
  6. Tatonka

    misunderstood valve specifications.

    I tried working out the units, but it looks like this, doesn't it? lbf psi = ---- in^2 lbf 1 lbf psi/in^3 = ---- x ---- = ---- in^2 in^3 in^5 Is this a specification on the elasticity of the system (tubing, etc)? If you add a cubic inch of...
  7. Tatonka

    misunderstood valve specifications.

    I just got home (1/2 day today, wooohooo!) so I don't have the spec number on me...it's for the Elevation Servo Mechanism for the M1A1 tank. I'll get the spec number up here on Thursday...
  8. Tatonka

    misunderstood valve specifications.

    I'm examining a military specification for a servo valve assembly and there are a few requirements/specifications that don't make a whole lot of sense to me... The spec states that the "valve bias pressure at hydraulic null shall be 5 to 50% of supply pressure." The valve is a...
  9. Tatonka

    misunderstood valve specifications.

    I'm examining a military specification for a servo valve assembly and there are a few requirements/specifications that don't make a whole lot of sense to me... The spec states that the "valve bias pressure at hydraulic null shall be 5 to 50% of supply pressure." The valve is a...
  10. Tatonka

    misunderstood valve specifications.

    I'm examining a military specification for a servo valve assembly and there are a few requirements/specifications that don't make a whole lot of sense to me... The spec states that the "valve bias pressure at hydraulic null shall be 5 to 50% of supply pressure." The valve is a...
  11. Tatonka

    misunderstood valve specifications.

    I'm examining a military specification for a servo valve assembly and there are a few requirements/specifications that don't make a whole lot of sense to me... The spec states that the "valve bias pressure at hydraulic null shall be 5 to 50% of supply pressure." The valve is a...
  12. Tatonka

    misunderstood valve specifications.

    I'm examining a military specification for a servo valve assembly and there are a few requirements/specifications that don't make a whole lot of sense to me... The spec states that the "valve bias pressure at hydraulic null shall be 5 to 50% of supply pressure." The valve is a...
  13. Tatonka

    fatigue in aluminum jig plate weldment

    1. The material is 6061-T6. 2. There can be post weld HT, we're still in the design stages, so this is entirely possible...we may need to do post weld HT to normalize the mat'l properties back to the -T6 condition, right? 3. Same deal...there can be other post weld operations performed as...
  14. Tatonka

    fatigue in aluminum jig plate weldment

    what methods/design intent can be used to minimized fatigue with aluminum weldments? i'm working on a weldment with several jig plate gussets that are essentially cantilevered to a vertical plate. the gussets have moderate static loading, but have rather high dynamic loads (they're supporting...
  15. Tatonka

    weld between components

    I think you'll have a hard time getting accurate displacement results with any method.
  16. Tatonka

    Moment to bend tube

    Since not all of the cross section of the pipe will be at the yield point, though, there will be some degree of "rebound" that will need to be accounted for...some additional "fudge factor" will be required to account for this remaining elastic stress.
  17. Tatonka

    fea contact problem

    We need more information...are all the loads/constraints in the same plane? If so, a 2D with cyclic loading may suffice. You may even be able to get away with a axisymmetric model...it really depends...
  18. Tatonka

    Non-laminar, non-fully developed flow in a duct

    I've recently been given the task of determining the percent increase in pressure loss for a system that will have several elbows added. The flow is very high (it's the supply for a gas-turbine engine). I hypothesized that by taking some peak measurements, I could approximate the current loss...
  19. Tatonka

    Duct Sizing by Hand vs. Ductulator

    If you look in any number of HVAC textbooks, they will give you an alternative "equivalent duct diameter" for rectangular tubing. Depending on the textbooks definition, some will give the equivalent diameter for a round duct section with the same pressure drop per unit length. It may...
  20. Tatonka

    FDA Solid Film Lube

    Anyone know of a FDA approved solid film lubricant for stainless steel parts?

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