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  1. Replies
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    MCoach, The comparatively low yaw inertia of...

    MCoach,
    The comparatively low yaw inertia of FSAE cars is accompanied by short wheelbases, meaning that the yaw moments generated by FSAE cars may also be comparatively low. It is perhaps better to...
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    108,139

    Ralph, This is an interesting question, as I...

    Ralph,

    This is an interesting question, as I haven’t dealt with asymmetric cars before. The following is based solely on my own reasoning, so corrections are welcome.

    Normally for most...
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    Dynatune, I see your point that in some...

    Dynatune,

    I see your point that in some circumstances a setup that is ‘worse’ in terms of additional tyre scrub or tyre vertical load variation over bumps can improve lap times by bringing the...
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    To comment a bit more on the UQ suspension:...

    To comment a bit more on the UQ suspension:
    Spring-wise this is effectively a 3 Z-bar (2 longitudinal, 1 lateral) setup like those pictured in Z’s sketch above. The connecting cables combined with...
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    This sounded intriguing, so after some searching...

    This sounded intriguing, so after some searching I found this on UQ's website (http://uqracing.com/):

    http://uqracing.com/wp-content/uploads/2013/08/1011273_10152281134426197_1374632189_n.jpg

    I...
  6. Replies
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    Dynatune, You are telling us that soft warp...

    Dynatune,

    You are telling us that soft warp suspensions did not prove to be beneficial in your experience, but you aren’t providing an engineering interpretation of why that was the case. I’m not...
  7. Replies
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    Jonny, I’m not sure if your last post was...

    Jonny,

    I’m not sure if your last post was tongue in cheek, but my team would mock up the driver position in two stages.

    First we would put drivers on a mock up seat back made from wood that we...
  8. Your question is pretty vague. What do you mean...

    Your question is pretty vague. What do you mean by ‘torsional rigidity’ and why do you need to calculate it? This will determine the accuracy you need and the items to consider.

    I’m assuming that...
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    It’s worth mentioning that the 2CV was designed...

    It’s worth mentioning that the 2CV was designed to be a cheap car capable of carrying eggs across a rough field without breaking them, not a sports car.

    The 2CV suspension springing arrangement is...
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    It sounds like you might be reffering to my post...

    It sounds like you might be reffering to my post in the thread mentioned by Chris.

    Link here:
    http://www.fsae.com/forums/showthread.php?1389-Any-way-to-objectively-choose-engine&p=29439
  11. Replies
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    There are definitely similarities to be found...

    There are definitely similarities to be found between earthmoving and FSAE. For example “short tail” excavators aim to reduce the radius of the rotating upper half of the machine by packaging...
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    I believe your frequencies are incorrect. One of...

    I believe your frequencies are incorrect. One of the natural frequencies will be zero (i.e. the two masses move together as if they were a single rigid body). There will actually be six of these...
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    Jay, I'm not sure if you're aware, but the KTM...

    Jay,

    I'm not sure if you're aware, but the KTM 390 Duke is a road bike suitable for commuting. It should have far lower maintenance requirements than any of the engines sourced from high...
  14. Replies
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    Tokyo Denki has placed the rear upper ball joints...

    Tokyo Denki has placed the rear upper ball joints outside of the rim in the past, so it has been done before in FSAE.

    Side note: I really liked the few Tokyo Denki cars I've seen. They are...
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    View Post

    Harry,

    I agree that it probably wouldn’t be allowed to run. However, you could place a brick underneath one wheel and the other 3 would remain in contact with the ground, while most conventional...
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    One way to create a lap sim that includes...

    One way to create a lap sim that includes combined longitudinal and lateral accelerations is to first describe the racing line mathematically in terms of inverse corner radius versus distance...
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    View Post

    Danny, rule T6.1 states: “The car must be equipped with a fully operational suspension system with shock absorbers, front and rear, with usable wheel travel of at least 50.8 mm (2 inches), 25.4 mm (1...
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    Not sure if rhetorical question. Regardless,...

    Not sure if rhetorical question. Regardless, steering the rear wheels in the opposite direction of the fronts generates an opposite slip angle, which generates (outwards) lateral force. Inward...
  19. Thread: V12

    by nowhere fast
    Replies
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    View Post

    Honda CBR250RR engines might make a ‘good’ base to make a small v12 from. The cam drive gears are placed in between cylinder 1 and 2 (or 3 and 4, I’m not sure), so you could lop the outer cylinder...
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    I think four cylinder 250cc motorcycles are only...

    I think four cylinder 250cc motorcycles are only really common, and therefore low cost, in Australia and Japan due to the unique motorcycle learner restrictions here.

    Turbocharging one of these...
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    Slightly on-topic:...

    Slightly on-topic:
    http://farm9.staticflickr.com/8428/7801096484_3cfc917a65_c_d.jpg
    http://farm9.staticflickr.com/8426/7801110276_7cf46331b9_c_d.jpg
    ...
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    Is it the 0.25 term that is causing confusion? ...

    Is it the 0.25 term that is causing confusion?

    Is the 0.25 meant to be multiplied through the entire matrix? If so then I think it is merely normalising the matrix so that each mode is a unit...
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    If I'm interpreting that matrix correctly; Heave...

    If I'm interpreting that matrix correctly; Heave is all four wheels moving in the same direction, so Heave *[1,1,1,1] will give the four individual wheel displacements for a given heave.

    Pitch is...
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    <BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Fantomas:
    There is no need for a clarification in my...
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    Geoff, I upgraded to graduate membership after...

    Geoff,

    I upgraded to graduate membership after graduating, but haven’t renewed this year. I may renew later, but only to support fsae.

    I don’t work in the automotive industry (although I’d like...
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