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11-22-2016, 07:03 PM | #1 |
Rock Crawler Join Date: Dec 2013 Location: Tuxedo NY
Posts: 582
| Good turning radius? (Diameter?)
So I'm finishing up my sporty, sucker punch chassis, XR wide mod axles, OD / UD, axial unis (beveled at the corners), hulksta plate, 7950, etc. What is a good turning circle? Like if I drove in a half circle, what should the inside "door to door" distance be? Or wheel track to wheel track? Maybe measured on concrete, so we can have similar test conditions, since it seems smaller on loose dirt... Last edited by Turtlejon; 11-22-2016 at 07:07 PM. |
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11-22-2016, 07:24 PM | #2 |
I wanna be Dave Join Date: Jan 2012 Location: williamsport
Posts: 8,649
| Re: Good turning radius? (Diameter?)
Can you post some pics of your setup? Some numbers that you came up with? Does your rig, push the front end or pull the rear, when your turning? |
11-22-2016, 08:09 PM | #3 |
I wanna be Dave Join Date: Aug 2004 Location: Tri-cities, WA
Posts: 4,831
| Re: Good turning radius? (Diameter?)
What steering arms do you have? 50* is all that's going to happen unless you modify VP arms or run something like rcbros arms. I'll go test mine in a minute but I've got 70* turning OD / UD and a heavy front end that keeps the front planted. |
11-22-2016, 08:18 PM | #4 |
I wanna be Dave Join Date: Aug 2004 Location: Tri-cities, WA
Posts: 4,831
| Re: Good turning radius? (Diameter?)
Smooth concrete floor 44" outside tire circle. On grippy surfaces it's much tighter, I'd say in the 36" or less range.
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11-22-2016, 08:30 PM | #5 |
Rock Crawler Join Date: Dec 2013 Location: Tuxedo NY
Posts: 582
| Re: Good turning radius? (Diameter?)
So I'm getting about 45* of steering, but like a 48" circle, measured inside to inside, on carpet. The front end is quite heavy. I don't know how to answer the push or pull question, the front wheels turn 1.2 times (or so) for every 1 turn of the rear wheel. The angle of this looks kinda off... It is clocked pretty far, I guess that could be what's holding it back... I'll go test it on concrete tomorrow Last edited by Turtlejon; 11-22-2016 at 08:36 PM. |
11-22-2016, 08:36 PM | #6 |
I wanna be Dave Join Date: Aug 2004 Location: Tri-cities, WA
Posts: 4,831
| Re: Good turning radius? (Diameter?)
Get some rcbros or krazed arms on there and you'll start needing to narrow your links and shock mounts on the axle. I'm running ar60's but the concept is the same. My links are I side the stock link mounts and the shocks are angled to clear the tires. They still hit pretty solidly. |
11-22-2016, 09:19 PM | #7 |
I wanna be Dave Join Date: Jan 2012 Location: williamsport
Posts: 8,649
| Re: Good turning radius? (Diameter?)
I don't know the degree's, but it looks like this.. 36" on the vinal kitchen floor.. If the rear is pushing the front, you have, push.. (bad setup) If your front is guiding the rear or pulling it into the center of your circle.. you have, pull.. The only problem with this test, is, it's not really what's happening on the rocks. But for thought, it helps ballpark.. Need more info on how it works or acts and reacts, on the rocks. I would recommend a longer horn and a little less caster. When you go with more steering, you'll want to mod the inside of the uni ears, as well. Last edited by winnerone23; 11-22-2016 at 09:21 PM. |
11-22-2016, 09:23 PM | #8 |
Rock Crawler Join Date: Jun 2007 Location: Arlington
Posts: 684
| Re: Good turning radius? (Diameter?)
Yep, White Trash is right. Never thought I'd type that.... You're gonna have to pull the arms out front a bit to get the leverage on the servo arm, and keep the right angles on the knuckles. I completely recommend the Krazed carbon arms if you want to keep those knuckles. As far as clocking, looks good to me. I run toe out, and dig that shit into my shocks and links. Helps with the polished look. |
11-22-2016, 09:38 PM | #9 | |
I wanna be Dave Join Date: Aug 2004 Location: Tri-cities, WA
Posts: 4,831
| Re: Good turning radius? (Diameter?) Quote:
The 8* parts he's using help with turning but not a whole lot on the rocks. I've ran 70* with both scx c hubs and wraith and the scx keep the angles pretty even across the whole range. I run a few degrees of toe out too. The dlux setup goes slightly toe in on the outside tire at full lock without it. | |
11-22-2016, 10:15 PM | #10 |
I wanna be Dave Join Date: Jan 2012 Location: williamsport
Posts: 8,649
| Re: Good turning radius? (Diameter?)
Funny you guys like a little toe out.. I run a little toe in. The outside tire, is the tire doing the work/steering. With toe in, you get better, smoother, steering With a little toe in, it keeps your insides tire from rubbing or possibly binding up your drive train. |
11-22-2016, 10:23 PM | #11 | |
Rock Crawler Join Date: Jun 2007 Location: Arlington
Posts: 684
| Re: Good turning radius? (Diameter?) Quote:
If you're turning the wheel and the inside turns farther, that's Ackermann. | |
11-22-2016, 10:37 PM | #12 | ||
I wanna be Dave Join Date: Aug 2004 Location: Tri-cities, WA
Posts: 4,831
| Re: Good turning radius? (Diameter?) Quote:
Quote:
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11-22-2016, 11:07 PM | #13 |
Rock Crawler Join Date: Dec 2013 Location: Tuxedo NY
Posts: 582
| Re: Good turning radius? (Diameter?)
So how much caster is too much? My last rig had a ton, and it really seemed to help when I was like walking the front end up with the servo... |
11-26-2016, 09:28 PM | #14 | |
I wanna be Dave Join Date: Aug 2004 Location: Tri-cities, WA
Posts: 4,831
| Re: Good turning radius? (Diameter?) Quote:
I'm headed out tomorrow to do a bunch of testing. I brought the toe out back in and made it toe in to see how it reacts. My gut tells me you're right even if my head and (slight) ocd says you're wrong. | |
11-26-2016, 09:44 PM | #15 | |
I wanna be Dave Join Date: Jan 2012 Location: williamsport
Posts: 8,649
| Re: Good turning radius? (Diameter?) Quote:
You can dial your rig in, thru the internet now! Lmao | |
11-26-2016, 09:53 PM | #16 |
I wanna be Dave Join Date: Aug 2004 Location: Tri-cities, WA
Posts: 4,831
| Re: Good turning radius? (Diameter?)
I can do that. I changed a bunch of things all at once that needed to be done but I can certainly post about the steering. |
11-26-2016, 10:12 PM | #17 | ||
I wanna be Dave Join Date: Jan 2012 Location: williamsport
Posts: 8,649
| Re: Good turning radius? (Diameter?) Quote:
Not anywhere as close to the stress your servo took, before you went with the desTroy plate.. Trust me! I haven't burnt a servo up since I designed it and started running mine! ;) As far as getting full lock, the right steering, etc.. that comes down to the amount of time you put into your setup. Too much caster(past 15°) you lose steering. The inside tire gets into your links or shocks. Dependent on 8° or non 8° C's.. I was all 8° until I watched Dlux run, at World's 2015.. I Watched what difference it made! I switched shortly after and watched what my rig was doing different. IMO.. I wouldn't ever go back to 8°.. Unless it's on a scale rig.. My C1 Troyota, C2 killer (TF2 modded with VP scx C's, knuckles and VVD's) and C2 scx XJ(VP wraith C's, knuckles and uni's) benefited enough from the amount of work I have put into them. I put as much work into my rigs steering, as I do into the rest of the rig. If not more! All are modded uni's, full lock to lock steering, matching EPA's(or dam close) Quote:
I run my rigs C's, around the 12°-15° area, for caster. It's shown the most benefit, all around. Some guys are around 20° or so and not only does it look crazy, but not needed. IMO.. Yes, it may help in the One spot.. but hinders in 10 more.. again, just IMO and what I Watch. I Watch alot of rigs in Many states and just as many different rock types.. I've crawled in a dozen states, at comps, with guys from surrounding states and countries.. I watch alot of rigs run.. Last edited by winnerone23; 11-26-2016 at 10:15 PM. | ||
11-26-2016, 10:19 PM | #18 |
I wanna be Dave Join Date: Jan 2012 Location: williamsport
Posts: 8,649
| Re: Good turning radius? (Diameter?) |
11-26-2016, 10:32 PM | #19 |
I wanna be Dave Join Date: Nov 2014 Location: West Texas
Posts: 2,654
| Re: Good turning radius? (Diameter?)
I'm following along I us the distroy plate and like it but could stand to dial in my steering better. 149 r/c worx's Team Driver |
11-26-2016, 10:48 PM | #20 |
I wanna be Dave Join Date: Jan 2012 Location: williamsport
Posts: 8,649
| Re: Good turning radius? (Diameter?) |
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