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Tamiya mini cooper

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Old 08-29-2015, 01:12 PM
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Originally Posted by rccartips View Post
Not to stir the pot, but personally I think the manual is ok on steering geometry versus having link 90 deg to servo because the link is not 90 deg on the steering upright.

Manual seems symmetric and looks better. 3rd place car at the Tamiya worlds a few years ago.

http://www.rccartips.com/m05-mini-3rd-2009.jpg

Mine is actually at 90deg to servo horn link primarily because that is where my radio trim is at perfect 0, and I do not want to have +30 on the trim just to get the servo to the above position (as it starts to have a weird effect on the epa of the servo).

Congrats on the 3rd spot in the Worlds. Good looking chassis you got there.

I personally like to center everything so mine are all at 90 degrees, but if your servo has enough throw to give you full lock on both L and R sides, I agree that it's really up to you if you want to center the servo or not.
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Old 08-29-2015, 01:32 PM
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Tamiya plugs??? You would have won if you ran deans plugs.... Anyway congrats on the 3rd place finish....
Why would Granpa give his cars away???
Originally Posted by rccartips View Post
Not to stir the pot, but personally I think the manual is ok on steering geometry versus having link 90 deg to servo because the link is not 90 deg on the steering upright.

Manual seems symmetric and looks better. 3rd place car at the Tamiya worlds a few years ago.



Mine is actually at 90deg to servo horn link primarily because that is where my radio trim is at perfect 0, and I do not want to have +30 on the trim just to get the servo to the above position (as it starts to have a weird effect on the epa of the servo).

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Old 08-29-2015, 02:41 PM
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That's not my car, just posting a pic. Never been to the worlds

This is my car.



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Old 08-29-2015, 03:18 PM
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Old 08-29-2015, 03:20 PM
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Originally Posted by niznai View Post
Primarily you can have the horn parallel to the servo and still be at zero trim. But you knew that, right?

Basic geometry principles dictate the horn needs to be perpendicular to the rod to give equal linear travel for equal sweep.

Geeez
Am I going to have to dig out my geometry and calc college books to understand you guys???
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Old 08-29-2015, 04:35 PM
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There's a whiteboard app for just this situation!

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Old 08-29-2015, 05:32 PM
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Thing is the link is not 90 deg on the steering bellcrank side. Maybe someone has the inclination to test with a protractor on both ideas and see which one is better.

i.e. a 30 deg movement left right on servo = 30 deg movement left right on steering bellcrank

For me, with link 90 deg to servo horn, my epa is L=100% and R=108% to turn same circle diameter left and right. Maybe it's my servo, maybe the geometry, need to steal my daughter's protractor.


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Old 08-29-2015, 07:17 PM
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Originally Posted by rccartips View Post

For me, with link 90 deg to servo horn, my epa is L=100% and R=108% to turn same circle diameter left and right. Maybe it's my servo, maybe the geometry, need to steal my daughter's protractor.



I may start out with even 100/100 EPA, but based on my car's asymetrical weight distribution (m-chassis) my EPA usually end up less on one side per driving characteristic to compensate.
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Old 08-30-2015, 03:57 AM
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OMFG!!! not the 90 degree horn again.

Can't we discuss something more interesting?
Like the origins of lipo henge perhaps?
Attached Thumbnails Tamiya mini cooper-lipohenge1.jpg  
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Old 08-30-2015, 04:19 AM
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Dang that's a lot of lipo's you got there!
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Old 08-30-2015, 05:58 AM
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Originally Posted by Tim K View Post
OMFG!!! not the 90 degree horn again.

Can't we discuss something more interesting?
Like the origins of lipo henge perhaps?

What? And miss out on monkeyracing's awesome whiteboard skills.

As to the henge...





...got to be aliens. 1/10 scale aliens.
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Old 08-30-2015, 09:05 AM
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We could combine a few things and I could draw crude pictures of the parts I broke on my Xevo a few weeks back. Or, I could just draw crude pictures.
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Old 08-30-2015, 09:13 AM
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Where are the weaknesses in the Xevo's chassis? Pictures with red circles might be easier to understand..
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Old 08-30-2015, 11:38 AM
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Well, there's the upper damper mounts the c-chub :l:

Last edited by monkeyracing; 08-12-2017 at 07:34 PM.
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Old 08-30-2015, 03:07 PM
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