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Old 07-19-2007, 11:16 AM   #4951
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See I knew dumping Physics and taking European Social and Economic History from 1750-1850 instead would come back to bite me in the ass

Uhm ya that is interesting and will require some thought given that what I thought was a minor change in camber link position actually has quite a significant effect on the pivots of the grounded and coupler links
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Old 07-19-2007, 11:30 AM   #4952
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Wow. I didn't think I'd see the day when four bar linkages were mentioned in an rctech post. Awesome.
...and from the guy who once had a picture of a human colon for his avatar.

Every now and then, we need to put the "Tech" back into this forum.
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Old 07-19-2007, 11:40 AM   #4953
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OK now were getting somewhere, let me rephrase the question to take some of the confusion away.

What effect does legnth of the a-arm have on a car. Ignore shock positioning, and its effect on shock forces as this can be the same. But what really are the effects of the overall length of the a-arm and why is there a difference between a longer arm or shorter arm and hex which equates to the same legnth of the a-arm. Not sure if Im asking the question right. but the question is not who has the best car and what is right or wrong its more of a theoretically speaking why is this the case?

For those of you like myself with small children look at me as the one saying "WHY?" everytime someone says you should do this........ I like to understand the principles behind things not just that it works or doesnt work but WHY does it work? Maybe I should change careers

To lead you in the right direction...Roll Center Migration
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Old 07-19-2007, 11:49 AM   #4954
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What effect does legnth of the a-arm have on a car. Ignore shock positioning, and its effect on shock forces as this can be the same.
a-arm length has a lot to do with shock positioning and it's effect on shock forces. the arm pivots around the chassis hinge pin, and if that length from the chassis pivot to the shock attachment point on the a-arm is shorter, which it will be on a shorter arm, the shock motion will be different.
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Old 07-19-2007, 11:55 AM   #4955
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To lead you in the right direction...Roll Center Migration
Not just that but also brings into play the role of downstops and upstops and camberlink angles hmmm its gonna be an interesting flight home from SoCal
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Old 07-19-2007, 11:56 PM   #4956
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I am running Hodges 06 nat's setup and was curious about a couple of things....he has the front hex at .225 and the rear at stock...if I take the rear out with the .195...wil that make it a little more stable through the turns? Also, with reguard to Caster what affect does increasing the angle have (go from 4 to 6)? and conversly from 6 to 4?
Most likely if you move the rear out to .195 your car will be too wide. I always run .165 in the rear.

On asphalt you will have less overall steering as you increase the caster.
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Old 07-20-2007, 12:01 AM   #4957
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Todd,
I hope you make it out to the BCR track sometime... They are having a summer slam race on the Aug. 18
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Old 07-20-2007, 09:58 AM   #4958
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I am currently using an airtronics servo with the #23 horn....is that right? Someone mentioned that there was a typo in the manual...any help? Ihave stripped one and the second one doesn't quite fit right.....
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Old 07-20-2007, 10:20 AM   #4959
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Default Updated setup

Hey guys. Tried this new setup, and it works remarkably well. Only thing that is lacking is driver skill...
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Old 07-20-2007, 05:58 PM   #4960
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Someone mentioned that there was a typo in the manual...any help? Ihave stripped one and the second one doesn't quite fit right.....
They are not right, for it was calling for a 25 for my KO and they did not work right. 23 is what worked on the KO, just try the other two and see what one fits better.
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Old 07-21-2007, 10:56 AM   #4961
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oh man i love this car more every time i run it

i ran bl 13.5 stock again last night and held tq until the final round where i got edged out by 2 seconds. my fast round had quite few "bad" laps at the start, so i know there was room to improve. in the main i got bumped down to last by the 3rd place car, had to work my way up. i worked up to about 3 seconds off 1st and 2nd and finished 3rd. i had probably the 5 fastest laps of the main though when i was reeling those two in.

time spent cutting motors: 0 minutes and 0 seconds
time spent fixing broken parts: 0 minutes and 0 seconds
time spent checking setup: less than 10 minutes for the whole night.
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Old 07-21-2007, 11:51 AM   #4962
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Originally Posted by RussB View Post
time spent cutting motors: 0 minutes and 0 seconds
time spent fixing broken parts: 0 minutes and 0 seconds
time spent checking setup: less than 10 minutes for the whole night.
I'm with you, I feel the same way.

But in case you didn't hear, brushless is only for beginners. :-)
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Old 07-21-2007, 12:16 PM   #4963
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I'm with you, I feel the same way.

But in case you didn't hear, brushless is only for beginners. :-)
yeah, it's soooo slow compared to brushed. actually, i did get spanked on the straight by a guy running a co27, but whatever. i *could* probably go up a tooth or three at night, but i'm already at 4.9 for temperature reasons during the heat of the day.
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Old 07-21-2007, 12:31 PM   #4964
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i ran bl 13.5 stock
with rubber tires? what was your spur/pinion?
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Old 07-21-2007, 12:34 PM   #4965
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with rubber tires? what was your spur/pinion?
rubber tires. i was running 114/42. i use the PRS adapter, so i can run any standard spur.
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