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  1. jetmakerbrit

    Find function with array in Mathcad

    Does anyone know if you can use an array as an input variable when solving an equation using the Find function in Mathcad? I would like to output an array with corresponding solutions to the values in the input array. The same question was asked a while ago in this thread - thread552-245502...
  2. jetmakerbrit

    Tube Joint Clip Analysis

    This clip is from an electronic supply rack on the C-130. The loads emanate from the weight of the LRUs and crash worthiness load factors. This joint is one of many similar joints in the rack. The fasteners holding this thing together are NAS603 bolts. I'm sure the moments are due to erroneous...
  3. jetmakerbrit

    Tube Joint Clip Analysis

    Thanks GBor your assumptions are correct. Looking at this structure on A/C, I realised this clip pivots on the single fastener on the left and would therefore not carry a moment into the other tube. This rack was modeled using beam elements in Nastran so looks as though the moment DOF need to be...
  4. jetmakerbrit

    Tube Joint Clip Analysis

    Could somebody please suggest how to analyse a clip joining tubes together in a rack I'm trying to substantiate. The clip joins two tubes perpendicular to each other. One tube slides through the end of the clip and the other slides inside the clip. The attached image will hopefully explain more...
  5. jetmakerbrit

    Tube Bending

    Can someone please confirm if I'm reading a drawing for a pressure tube correctly. The drawing consists of data for a Leonard tube bender. The following data is given: length 17.5", dia 0.25", rad 0.75", Bend procedure R/H. Bend, Dist from A, Bend, Dial 1, 15.063, 79, 0 2, 12.125, 85, 84 3...
  6. jetmakerbrit

    Rack and Pinion Steering

    Thanks for email - unfortunately I didn't receive the attachment. Would it be possible to send the dxf file again? Many thanks
  7. jetmakerbrit

    Rack and Pinion Steering

    The pinion teeth are being machined onto the outside of a tubular part. This part turns inside another which also holds the rack. By my understanding, a profile shift would need greater clearance. Since there is no space to grow the outer component and the rack needs to be as short as possible...
  8. jetmakerbrit

    Rack and Pinion Steering

    diamondjim email jetmakerbrit@hotmail.com thanks
  9. jetmakerbrit

    Rack and Pinion Steering

    Thank you again diamondjim, An ACAD (.dxf) layout of a 5 DP stub tooth with full fillet radius would be extremely helpful. I was thinking of using module 5 teeth on a 160mm PCD giving 32 teeth over 360 degrees, since I only have teeth on 180 degrees (steering +-90) of my pinion I would have 17...
  10. jetmakerbrit

    Rack and Pinion Steering

    Thanks for the information diamondjim, I would prefer to stick with a 20 degree pressure angle so the stub tooth sounds an acceptable way forward. I calculated the stub tooth contact ratio to be 1.389 which seems close enough to the recommended 1.4. I understand that addendum+dedendum=whole...
  11. jetmakerbrit

    Rack and Pinion Steering

    I'm designing rack and pinion steering for a landing gear system and need some advice on gear tooth selection. Standard gear teeth proportions are unacceptable for stress reasons. I'm working with a module 5 tooth on a 160mm PCD. I'm thinking of using an equivalent 20-degree American Standard...

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