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Old 10-25-2004, 11:18 AM   #1
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Default Concept of Rollout

Hey guys, I am pretty new to rc.
I am just getting to learn all the ins and outs of setup.
I am wondering if someone can explain to me (In real basic terms) the concept of Rollout and how every aspect plays into it... ex. tire diameter , pinion , spur gear, motor and or whatever else infuluences it.. Thanks...
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Old 10-25-2004, 12:02 PM   #2
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In simple terms, rollout is the distance the car moves in mm or inches per rotation of the motor.
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Old 10-25-2004, 12:14 PM   #3
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So.. if i'm running a tc3 indoors.. is there a number i'm looking for.... or do i let my setup dictate the rollout?
In other words... is rollout a number that is a result of your setup or is it a number you should be trying to achieve with your setup changes... do I make any sense???? lol
Thanks
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Old 10-25-2004, 12:18 PM   #4
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It's per 1 complete roation(6 notches) of the *motor*.
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Old 10-25-2004, 12:24 PM   #5
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Freddie Roll out shouldnt affect setup that much. Roll out is for gearing your car to the optimal speed. If your car is undergeared and you figure it out then gear it properly you might have to alter your setup slightly because you have more speed coming into turns......example. your setup relatively soft and you gear differently and are now "up to speed" so your car being soft might "roll" in the coners. That is the biggest thing you have to worry about. As a rule of thumb once your car is setup the biggest change you will have to make when going from track to track is rear roll center.....it will make your car rotate more or less and thats what you will probably be looking for.
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Old 10-25-2004, 01:21 PM   #6
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Thanks guys I think I have it now....
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Old 10-25-2004, 01:29 PM   #7
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i have been into rc for a while but just got seriouse like 6 months ago and i still have yet to learn everything, but i keep a notebook filled with everything you need to know, its kinda weired i know but it helps me a hell of alot
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Old 10-25-2004, 01:51 PM   #8
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No.. sounds about right.. I have a small booklet where I keep setup sheets, and motor and battery logs... I am also going to add rollout on my setup sheets for different tracks.. I had someone email me about rollout and this is basically how he explained it... You do your setup based on practice on the track..ex. trying different gearing for more speed down the st8 without losing your punch in the corners.... so when you find a good gearing... you should right down your setup..
pinion , spur... tire size...
then you have a rollout... and now you know that later when your tires wear or you go to a new set.... you can change your gearing 1 pin higher or lower on your pinion to keep the same rollout for the track due to the change in tire size...
COOL huh?
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Old 10-25-2004, 02:10 PM   #9
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The most common way is let your car wind out about half way down straight and start there that gives best straight away speed and punch,I have found at Jackson for stock 29mm is good and DC 22 mm is good starting points.

EX: 100/32=3.12x2.5=7.81 (2.5 is tc3 trans)
55x3.1416=172.78
172.78/7.81=22.12mm

Hope this also helps Fred
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Old 10-25-2004, 02:37 PM   #10
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It does Thanks John.....
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Old 10-25-2004, 07:20 PM   #11
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You can create rollout charts and "target rollout" charts (good for changing pinoins as your foams decrease in diameter) at my site at http://www.gearchart.com
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Old 10-25-2004, 08:42 PM   #12
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Thanks.. printed out some nice charts....
Thanks again!!!
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