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  • Users: GTMule
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  1. GTMule

    4340 cracking dhuring h/t

    Hey everyone, We've got a rather large 4340 part that is cracking at some point during heat treatment. All the work is being done out of house, and I assume the heat treater never noticed the cracks (though I can't IMAGINE how not) Print speced 180-200ksi Link below with some pictures. For...
  2. GTMule

    Steel Flywheel

    I'm having a custom flywheel machined, and I wanted to know what heat treat specs you all think I should be shooting for. It'l be made of 4140, unless anyone can give me a reason I should step up and use 4340 ($). I'm thinking I want a through heat treat, on the order of rc45, comments...
  3. GTMule

    Flywheel Heat treat/Material

    Hey everyone. I'm having a custom flywheel machined, and I wanted to know what heat treat specs you all think I should be shooting for. It'l be made of 4140, unless anyone can give me a reason I should step up and use 4340 ($). I'm thinking I want a through heat treat, on the order of rc45...
  4. GTMule

    A-Arm material

    Is there any possible reason to use 4140 pre-hard to make the machined parts (that the spechrcals mount into) on a set of racecar A-arms. The parts will be normalized, but not heat treated, I can't see how theyr'ed be ANY reason to use pre-hard, with the welding and normalizing. The prints...
  5. GTMule

    Cosmoss FlowWorks Question (should be basic)

    What am I missing. I'm using Cosmos flowworks for submerged bodies (actually, race cars in ground effect), and I can find no way to get answers for Cp and the like. What gives? Also, I get different drag (or lift) numbers when looking at the goals, and the reports. I'm pretty good with the...
  6. GTMule

    Cosmos DesignStar

    Hey guys, This is a LITTLE off topic, but though the SW forum would be the best palce to tackle it, since I couldn't find a cosmos forum of any kind and theyr'e quite similar in interface design (intentionally). I've been playing around with running external flow simulations in COSMOS...
  7. GTMule

    MAzda 13B-12A Drawings/model

    Hi everyone, I've been assigned the take of designing a bellhousing for a mazda rotary (12A) engine in a project at work. I was wondering if anyone had, at the least, a drawing of the rear mounting face of a mazda rotary engine. Also VERY helpful would be dimensional data for other parts of...
  8. GTMule

    Best Aluminum Alloy to use

    In an automotive race application what aluminum alloy would you all recommend for the fabrication (CNC machining, mostly) of many of the various suspension and engine brackets on the car, such as those attaching the engine to the car (where the engine is a stressed member of the chassis)...
  9. GTMule

    Spherical bearings/Rod ends in asemblies

    Still working on modeling the rear end of a race car. Well, all those suspension bits are connected with rod ends, and balljoints. Modeling all of this is not a problem, but, I cna't seem to get it properly constrained such that I can move it all around, and check for interference at different...
  10. GTMule

    SW 2001 Plus Installation prblems

    For some reason, after formatting my Hard drive, , re-installing windows, and then re-installing SW 2001 Plus, I nolonger have the ability to do Drawings. I said, ok, fine, uninstalled, re-installed, and, now, I can't do assemblies OR drawings, all I have is the part modelling ability...
  11. GTMule

    Tubing cut teplates, is there a way?

    I am working on modelling some fairly simple pieces of fabricated 1 1/4 metal tubing. In the parts, there are various joints, at various compound angles, none of which are anyhting simple, like 45, or 90 degs. The joints will all be welded, and gusseted, with threadded buckets in the joints...
  12. GTMule

    6061 T6 fatigue in high stress application?

    I'm working on a project, designing some pieces to a race car. The car is a design with a fully stressed engine, and therefore, the engine mounts essentially hold the car together. My question is, for a part that's taking the vibration of the engine and road, as well as the off and on loading...

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