R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 12-21-2008, 03:09 AM   #1
Tech Addict
 
32819toon's Avatar
 
Join Date: Mar 2006
Location: North of England
Posts: 580
Trader Rating: 1 (100%+)
Default STEERING TURN IN / ACKERMAN

Hi,

I've got a bit of a problem with my steering. I'm driving a Kyosho TF5 RTR car which I'm quite impressed with. The only thing is that I'm struggling to get enough turn in on sharp corners. Our track is very narrow and twisty and the only way I can get around some of our tracks is to go wide into the corners. I've tried the tyre/spring/tyre treatment/knuckle settings/bla de bla tuning but I'm still struggling getting enough turn in. Can someone help as I must be missing something.

Many thanks, and a very Merry Christmas to you all on RCTech.net

Regards,

32819toon
__________________
32819toon
VBC Wildfire D08, Yokomo BD7 RS, Schumacher Atom, Tamiya M03, M05 (outdoor Mini), M03RWD, MF01-X, BSR M-Rage, ABC Gambado, Associated TC4 (outdoor car).
32819toon is offline   Reply With Quote
Old 12-21-2008, 07:38 AM   #2
Tech Regular
 
#88driver's Avatar
 
Join Date: Apr 2008
Location: Jonesboro, Arkansas
Posts: 482
Default

To get the quickest, most aggresive steering, you are going to want your steering rods as straight as possible. Here is a link to a great website that can help you with this kind of stuff:
http://richardchang.com/hobby/rctips_tc_summary.pdf
__________________
Colton Jaynes
*RC America*Hudy*Xray*Jaco*KO Propo*SMC*EA Motorsports*
rchobbiesstore.com
#88driver is offline   Reply With Quote
Old 12-21-2008, 07:53 AM   #3
Tech Addict
 
32819toon's Avatar
 
Join Date: Mar 2006
Location: North of England
Posts: 580
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by #88driver View Post
To get the quickest, most aggresive steering, you are going to want your steering rods as straight as possible. Here is a link to a great website that can help you with this kind of stuff:
http://richardchang.com/hobby/rctips_tc_summary.pdf
Thanks for the website, I'll put a copy of that in my pitbox.
__________________
32819toon
VBC Wildfire D08, Yokomo BD7 RS, Schumacher Atom, Tamiya M03, M05 (outdoor Mini), M03RWD, MF01-X, BSR M-Rage, ABC Gambado, Associated TC4 (outdoor car).
32819toon is offline   Reply With Quote
Old 12-21-2008, 08:04 AM   #4
Tech Apprentice
 
rsperson's Avatar
 
Join Date: Nov 2002
Posts: 62
Default The all important question

This all really depends on the car. Touring/4-wheel drive/front driven wheels
With a 4 wheel drive vehicle - Ackerman is a very important tuning tool.

2 wheel drive and a live/solid rear axle - aka Pan Car. Whole different world.
I always believed that an undriven wheel - pan car - is adversely affected by ackerman - the less you have - the better the car handles.

But I invite discussion on the pan car -
rsperson is offline   Reply With Quote
Old 12-21-2008, 10:07 AM   #5
mok
Tech Master
 
mok's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jul 2007
Location: Perth, Australia
Posts: 1,075
Trader Rating: 9 (100%+)
Send a message via MSN to mok Send a message via Skype™ to mok
Default

Quote:
Originally Posted by rsperson View Post
This all really depends on the car. Touring/4-wheel drive/front driven wheels
With a 4 wheel drive vehicle - Ackerman is a very important tuning tool.

2 wheel drive and a live/solid rear axle - aka Pan Car. Whole different world.
I always believed that an undriven wheel - pan car - is adversely affected by ackerman - the less you have - the better the car handles.

But I invite discussion on the pan car -
re: ackerman

i agree with those comments..
and i think it applies to any direct drive chassis (eg. F103)
__________________
XRAY T3'2011 / TEKIN RS PRO / LRP X12 / HYPERION SWIFT G3 RACE PACKS / FUTABA S9551 / SPEKTRUM DX3R
www.epracer.com - www.precc.org.au - www.westcoastmodelrallyclub.asn.au - www.onroadrccarclubbunbury.org.au
mok is offline   Reply With Quote
Old 12-28-2008, 03:19 AM   #6
Tech Addict
 
32819toon's Avatar
 
Join Date: Mar 2006
Location: North of England
Posts: 580
Trader Rating: 1 (100%+)
Default

What effect does putting a shim under the ball joint have ?
__________________
32819toon
VBC Wildfire D08, Yokomo BD7 RS, Schumacher Atom, Tamiya M03, M05 (outdoor Mini), M03RWD, MF01-X, BSR M-Rage, ABC Gambado, Associated TC4 (outdoor car).
32819toon is offline   Reply With Quote
Old 12-28-2008, 09:27 AM   #7
Tech Master
 
picco007's Avatar
 
Join Date: Dec 2001
Location: TX.
Posts: 1,814
Trader Rating: 91 (100%+)
Send a message via AIM to picco007 Send a message via Yahoo to picco007
Default

Quote:
Originally Posted by 32819toon View Post
What effect does putting a shim under the ball joint have ?
Well a buddy of mine can help answer that for sure but he told me to put a shim under the ball at the wheel to help take out bump steer. We a 12r5 with the servo flat. When we first put the car together the steering rods were higher at the servo having an angle to the wheel that was lower. Putting a shim under the ball at the wheel helped. He told me when the car was in the turn he feel like it hesitated or slowed down too much, by putting the shim under the ball it smoothed the car out in the turns making it easier to drive.

I hope this helps...maybe he'll come on and correct me if i got it wrong.
__________________
EA Motorsports
picco007 is offline   Reply With Quote
Old 12-28-2008, 09:36 AM   #8
P2
Tech Fanatic
 
P2's Avatar
 
Join Date: Aug 2003
Location: Oahu, Hi
Posts: 865
Trader Rating: 15 (100%+)
Default

Picco007...you are right about the bump steer, but I think they are talking about turnbuckles font to back - I bet your buddy lapped you yesterday

In the 2nd post it says that the more straight/in-line the turnbuckles are, the greatest ackerman/steering. But reading my 008 manual it says that the more forward the angle, ie. adding shims under the servo saver ball studs, will give the most ackerman/steering in and out of corners.

Can someone clarify?
__________________
TopRacingUSA | Team EPIC | Thunder Power | OD Racing
P2 is offline   Reply With Quote
Old 12-28-2008, 09:41 AM   #9
Tech Master
 
picco007's Avatar
 
Join Date: Dec 2001
Location: TX.
Posts: 1,814
Trader Rating: 91 (100%+)
Send a message via AIM to picco007 Send a message via Yahoo to picco007
Default

oops my bad.
__________________
EA Motorsports
picco007 is offline   Reply With Quote
Old 12-28-2008, 10:28 AM   #10
Tech Champion
 
TryHard's Avatar
 
Join Date: Jun 2004
Location: Sydney, NSW
Posts: 5,284
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by P2 View Post
In the 2nd post it says that the more straight/in-line the turnbuckles are, the greatest ackerman/steering. But reading my 008 manual it says that the more forward the angle, ie. adding shims under the servo saver ball studs, will give the most ackerman/steering in and out of corners.

Can someone clarify?
You'll find thats becuase the 008 has the links angled the other way to most, i.e. to make it straighter you need to remove shims. On the 416, it's the opposite (removing shims make it more angled).

The general though is, the straighter the link, the greater the ackerman effect.

HiH
Ed
__________________
| THard.co.uk | Xray | MuchMore |
TryHard is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tamiya TA05MS academygaz Electric On-Road 1401 01-15-2016 06:00 AM
XRAY T2’009 bola Electric On-Road 2679 07-06-2014 06:25 PM
Serpent to 1/10th EP Touring Kit S400 rcforum Electric On-Road 3296 05-31-2013 02:48 PM
New 1/28 pan chassis, Greyscale Racing MRCG color0 Micro and Mini Scales 47 05-20-2013 11:21 PM
I need your help [Buggy Gurus] Jim Bob Nitro Off-Road 30 07-05-2008 11:41 PM
Losi Off-road!!! Speedo Electric Off-Road 326 11-12-2003 11:15 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 12:24 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net