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  1. Agreed. If you are going with a filtering method...

    Agreed. If you are going with a filtering method (rather than the above curve-fit to arc methods), working with the raw signal is often preferential. Not sure what GPS noise looks like, but it's...
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    Perhaps unknown is not quite an accurate term....

    Perhaps unknown is not quite an accurate term. Doing basic statics and assuming a 2 force member has the potential to be very non-conservative in buckling. I'm not advocating such a ridiculous FS...
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    Structures experts I know suggest always keeping...

    Structures experts I know suggest always keeping buckling factor of safety > 8-10 to account for unknowns.

    Like suggested above, do the FEA and see what it says. I'm surprised your hand calcs...
  4. ^huh? You'll want to send your question to the...

    ^huh?

    You'll want to send your question to the rule's committee for their blessing.
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    I agree with Z there. Switching to 4130 is a bit...

    I agree with Z there. Switching to 4130 is a bit curious-it would seem like a cost/availability-driven switch but I'm curious to hear from Scotty/TRE.
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    Titanium-interesting. Why did you use that? ...

    Titanium-interesting. Why did you use that?

    Typical axle materials are 300M or 4340.
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    What length do you need? Did you check with...

    What length do you need?

    Did you check with Hyperco, Swift, Draco, or Eibach? AFAIK, all of them will make you custom springs for quite reasonable cost. I just took a quick look and Hyperco stocks...
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    Most teams do design their own hubs since it...

    Most teams do design their own hubs since it affords a lot of freedom in packaging, wheel selection, etc. as well as often results in a lower mass assembly than anything off-the-shelf.

    If you are...
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    What is it? (Not very well versed on different...

    What is it? (Not very well versed on different bike motors here...)

    One the surface the Raptor 660 seems like it could be a neat engine to try out. It seems to be cheaper around here than the...
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    I have a few questions for you relevant to your...

    I have a few questions for you relevant to your questions:

    1) How fast are you sampling now?
    2) What filters are you using and how are you applying them?
    3) Are your sensors noisy because of...
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    No official information but...there was a car...

    No official information but...there was a car that crashed at FSAEM in 2014 or 2015 with a bolted on IA plate where the assembly basically pushed into the leg area and crushed the pedals. Seeing that...
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    Exhaust red hot implies that you're burning in it...

    Exhaust red hot implies that you're burning in it so either you are pig rich or your timing is super retarded.

    Can you post up a fuel and ignition map as well as pictures of your crank setup, etc....
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    Mag meters are pretty good too. I'd rank them...

    Mag meters are pretty good too. I'd rank them right up there with turbines. For the application I don't think you could go wrong with either choice.

    Ultrasonic meters are generally very expensive...
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    How cheap is cheap? With a price range it's...

    How cheap is cheap? With a price range it's easier to suggest options. I've designed test stands for a number of applications (many of them super hot with pretty extreme transients) and you have a...
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    Apologies if it sounds that way, but I'm not...

    Apologies if it sounds that way, but I'm not advocating for university funding support. Despite our best efforts, we always had problems on the university administrative end. By university rules, our...
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    Wow. Talk about a slap in the face comment for...

    Wow. Talk about a slap in the face comment for all those hardworking, clever, teams which have not found the magical sponsor unicorn.

    After having participated in FSAE in the US for 9 years and...
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    I would hope everyone is machining the bore to...

    I would hope everyone is machining the bore to specified press fit. The stakes or snaps really are only to prevent the bearing from coming out in event of press failure.
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    We had the same issue with similar circlips and...

    We had the same issue with similar circlips and would also grind off the innermost region of the tab to prevent interference.

    Our final solution was moving to staking. Staking is really easier...
  19. Were they clean before you welded? I've seen...

    Were they clean before you welded? I've seen welds like that just from very oil-impregnated metal.

    I have a feeling that as long as you anneal it (like you might a 4130-4130 joint) you won't have...
  20. Thread: Clutch lever

    by jd74914
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    They can fray and bind if not properly installed...

    They can fray and bind if not properly installed and are generally much larger and harder to route than a hydraulic line.

    (Just playing devil's advocate...We'd always used cables, but I had always...
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    Good welding is important, but this is really not...

    Good welding is important, but this is really not always realistic given time constraints and student training. It takes a long time to become a good welder (TIG especially), more time than a new...
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    Sorry...one more point. My terminology above...

    Sorry...one more point.

    My terminology above is technically incorrect. You are not normalizing the metal (this takes ~1600F), but actually stress-relieving it. Normalizing requires a furnace, etc....
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    I'm going off memory here so you'll want to check...

    I'm going off memory here so you'll want to check my hard numbers, but this is our rough process. Hopefully it helps!

    There is actually a pretty good instruction set in Carroll Smith's Engineer to...
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    We have normalized since 2012. It really doesn't...

    We have normalized since 2012. It really doesn't take much time to do, and in our experience really does make a difference on more highly-loaded joints. David Finch of Raetech fame told me once that...
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    Yes, you're definitely right; all of this...

    Yes, you're definitely right; all of this analysis is only useful for making model change comparisons and is not rigorously correct. IMHO to the rigid bearing assumption is the weakest point in the...
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