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Type: Posts; User: Pico

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  1. Replies
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    With what i proposed the safety factor I would...

    With what i proposed the safety factor I would use is 1. It's so over conservative, it's an ultimate load case and you'll never reach it. But strain gauges will tell you what you're really seeing...
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    I think that looking at the problem from another...

    I think that looking at the problem from another point might prove more straightforward. If you know what the maximum torque output of your engine is in 1st gear you assume that it induces the max...
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    Correct me if I'm wrong. You're trying to create...

    Correct me if I'm wrong. You're trying to create a front to rear brake bias (eg 60:40) while just relying on only MC diameters and piston diameters? Since your larger diameter MC is to the rear brake...
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    I can say I personally checked a result from...

    I can say I personally checked a result from Ansys Workbench with some hand calculations and it was fine. I wouldn't dismiss the open source one but with 1300 nodes you're very limited in the type of...
  5. Adding to the above, before running your model,...

    Adding to the above, before running your model, you need to find out if your mesh size gives you a converging result. You run a benchmark model (simplified version) while decreasing the mesh size,...
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    The knife edge from the countersink is a huge...

    The knife edge from the countersink is a huge issue with fatigue no matter the material. A huge stress raiser coupled with a large initial crack from the drilling/knife edge and you got the perfect...
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    Question for $200: what's the "standard" way for...

    Question for $200: what's the "standard" way for specifying fastener size?
  8. Thread: Mounting Rockers

    by Pico
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    3,749

    Completely agree with Mike and Mega. My 2...

    Completely agree with Mike and Mega.

    My 2 cents piece: These mounts need to be well jigged so make sure it's fool proof. The last thing you want is them to be crooked or the tubes running front to...
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    <BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Will an in-tank pump with plastic "fuel cup" solve the problem?...
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    You could use ANSYS classical version...

    You could use ANSYS classical version...
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    I would first ask: 1. Why do you really want...

    I would first ask:

    1. Why do you really want to make carbon a arms? Is there a need for it or just wanna have it kinda thing?
    2. What sort of % weight savings are you getting?
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    If you look closely at the drawing you would...

    If you look closely at the drawing you would notice the MAJOR DIAMETER of the splines is 23mm. You should reread the drawing carefully because all the information is there and correct.
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    Bondo: Fibreglass body filler compound We used...

    Bondo: Fibreglass body filler compound

    We used this on our moulds for many years even up to today. It's a filler and catalyst that you mix and apply it to add a hard surface which you can sand to...
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    In 2009 I decided to run flexible lines...

    In 2009 I decided to run flexible lines throughout the entire car. Although now we have a solid-flex setup I believe that on a FSAE we don't have the pressures encountered on larger cars and flexible...
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    Question 2 and 3: That's engineering

    Question 2 and 3: That's engineering
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    Fixed master cylinder pushrods allow for some...

    Fixed master cylinder pushrods allow for some misalignment (4deg on AP2623). The pushrods do not bend since they're free to angle themselves (ie two force members). The piston runs on the bore and...
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    Should ask yourself what is mechanical...

    Should ask yourself what is mechanical efficiency, how would you calculate it...that will answer your question. MC selection is more so dependent on cost and packaging.
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    An analysis on a piece isn't going to give you a...

    An analysis on a piece isn't going to give you a stress-strain curve. If you're doing a detailed analysis of a bolted joint you need to make sure your connections and constraints are correct. You...
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    Here, this is a good reference: ...

    Here, this is a good reference:

    http://dsr.racer.net/images/pa...eering_rack_assy.jpg

    If you're getting a lot of rack roll you must have a good bit of play, if I'm not mistaken?
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    If you really want to make an aluminium monocoque...

    If you really want to make an aluminium monocoque you should look into airframe design as you can make it pretty light while being easy to make and stiff enough for your application.
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    Everyone is crazy on weight savings and a carbon...

    Everyone is crazy on weight savings and a carbon composite sandwich structure combines the lightweight, strength and geometric flexibility that these teams want. Also not seeing any aluminium...
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    Knowing that the tolerances on a frame are in the...

    Knowing that the tolerances on a frame are in the order of +/- 1/16, usually leave about 0.25 all around the foot section. We almost didn't pass this year because the cockpit opening section was too...
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    You should read this: ...

    You should read this:

    http://www.sae.org/servlets/pr...MULA&RELEASE_ID=1354
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    My opinion is that as a first time car you should...

    My opinion is that as a first time car you should stick to the basic materials (steel, aluminium). You could ask them if they want to weld your mild steel frame, thats a big aid? On the other hand...
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    I'd like to see pictures of those failed brackets...

    I'd like to see pictures of those failed brackets if you have any.
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