R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 07-03-2009, 09:41 AM   #1216
Tech Master
 
Josh Cyrul's Avatar
 
Join Date: Sep 2003
Location: Farmington Hills, Michigan
Posts: 1,409
Default

John - Those ackerman #'s are the difference in relation from inside/outside wheel travel from 0 degrees. Example - Going back to the chart 21mm crank (shortest setting) with a 12mm insert gives you an inside wheel angle of 25 degrees with the outside turning 17.65 = 7.35 degrees of ackerman at 25 degrees of inside wheel travel.

I haven't looked back at the servo arm to calculate the amount of servo travel/angle. I have general #'s that I've liked to stay within for the servo arm, bell crank, steering block reduction.....
__________________
Destiny, Ko Propo, Hobby Wing, Ulti Racing Tires, Protoform, Xenon Racing, Pivothead, Vizon, TQ Wire & Hella Graphics
Josh Cyrul is offline   Reply With Quote
Old 07-03-2009, 10:03 AM   #1217
Tech Master
 
Join Date: Jul 2004
Location: MI
Posts: 1,544
Trader Rating: 1 (100%+)
Send a message via AIM to John St.Amant Send a message via MSN to John St.Amant Send a message via Yahoo to John St.Amant
Default

Quote:
Originally Posted by Josh Cyrul View Post
John - Those ackerman #'s are the difference in relation from inside/outside wheel travel from 0 degrees. Example - Going back to the chart 21mm crank (shortest setting) with a 12mm insert gives you an inside wheel angle of 25 degrees with the outside turning 17.65 = 7.35 degrees of ackerman at 25 degrees of inside wheel travel.

I haven't looked back at the servo arm to calculate the amount of servo travel/angle. I have general #'s that I've liked to stay within for the servo arm, bell crank, steering block reduction.....
Excellent ... Ty !
__________________
Pro-Line Racing , Boca Bearings , Competition Heat.
Team Durango DEX210, DEX410V3, DESC410R, DNX408
Futaba FAAST 2.4 4PkS, LRP, Tekin, Xcellorin
John St.Amant is offline   Reply With Quote
Old 07-03-2009, 11:33 AM   #1218
Tech Regular
 
nocif13's Avatar
 
Join Date: Sep 2007
Location: france MARSEILLE
Posts: 289
Send a message via MSN to nocif13
Default

photon review

http://top-photon.blogspot.com/
__________________
teamspec/petitrc.com/TEAM WAVE/T.O.P racing/CBRacing.fr/rcmanufactory/Alien POWER/Team Terribles
nocif13 is offline   Reply With Quote
Old 07-03-2009, 12:00 PM   #1219
Tech Master
 
smoke81's Avatar
 
Join Date: May 2003
Location: Kansas City
Posts: 1,224
Send a message via AIM to smoke81 Send a message via Yahoo to smoke81
Default

Hey Josh if I put a 2mm shim on my sway bars it seems the link will hit the cvds.. It takes a bit of suspension travel, but not out of the realm of possibilities . Just curious if you could give me a measurement from the bottom the ball cup to the top of the ball? Thanks..

Just thought i'd add.. 3mm and it seems to have all the room in the world in there..
__________________
Dustin Layne

Last edited by smoke81; 07-03-2009 at 12:14 PM.
smoke81 is offline   Reply With Quote
Old 07-03-2009, 02:11 PM   #1220
Tech Elite
 
Goingfast's Avatar
 
Join Date: May 2007
Posts: 2,454
Trader Rating: 29 (100%+)
Default

Did anybody get any Photon Decals?
__________________
Everybody is ignorant, only on different subjects.

AE 12R5.1,Tekin RS PRO
17.5 super stock T.O.P PHOTON , TAMIYA M05 Mini
CEFX.. High Velocity Racing Motor
Goingfast is offline   Reply With Quote
Old 07-03-2009, 02:18 PM   #1221
Tech Champion
 
RC MARKET's Avatar
 
Join Date: Feb 2007
Location: HK
Posts: 6,137
Trader Rating: 12 (100%+)
Default

Quote:
Originally Posted by Goingfast View Post
Did anybody get any Photon Decals?
Decal was arrived 1 week for was buy this car customer !
RC MARKET is offline   Reply With Quote
Old 07-03-2009, 04:42 PM   #1222
Tech Master
 
adamge's Avatar
 
Join Date: Sep 2006
Location: Saskatoon,SK Canada
Posts: 1,654
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by RC MARKET View Post
Decal was arrived 1 week for was buy this car customer !
hehe, I think that's your best post yet, rcmarket !!
__________________
When someone is intent on excelling in an otherwise laudable manner, does he not desire to inflict pain on others by means of his exalted status and enjoy the envy he arouses? Is there not an anticipated delight in an artist's ability to defeat his artistic rivals, which heightens his euphoria in creation?
-Nietzsche
adamge is offline   Reply With Quote
Old 07-03-2009, 07:56 PM   #1223
Tech Master
 
PitNamedGordie's Avatar
 
Join Date: Nov 2003
Location: Highwood, IL
Posts: 1,788
Trader Rating: 8 (100%+)
Send a message via AIM to PitNamedGordie Send a message via Yahoo to PitNamedGordie
Default

Quote:
Originally Posted by Goingfast View Post
Did anybody get any Photon Decals?
Yeah I'm painting a body for my car tonight and was thinking what's with not including some decals...
__________________
☆ The Track @ Harbor Hobbies ☆ www.harbor-hobby.net ☆
PitNamedGordie is offline   Reply With Quote
Old 07-03-2009, 08:19 PM   #1224
Tech Regular
 
beaim's Avatar
 
Join Date: Jul 2007
Posts: 477
Trader Rating: 8 (90%+)
Send a message via MSN to beaim
Default

hey guys,

droop measurement is to use the Droop Gauge,if follow manual, set it at F & R 5.5 . correct me if i am wrong.thanks

how about front 5.5 rear 1.

or front 1 rear 5.5. provide me some teory, will test later.
beaim is offline   Reply With Quote
Old 07-03-2009, 11:52 PM   #1225
Tech Champion
 
CraigM's Avatar
 
Join Date: Mar 2007
Location: Sydney, Australia
Posts: 7,009
Trader Rating: 34 (100%+)
Default

Quote:
Originally Posted by Josh Cyrul View Post
John - Those ackerman #'s are the difference in relation from inside/outside wheel travel from 0 degrees. Example - Going back to the chart 21mm crank (shortest setting) with a 12mm insert gives you an inside wheel angle of 25 degrees with the outside turning 17.65 = 7.35 degrees of ackerman at 25 degrees of inside wheel travel.

I haven't looked back at the servo arm to calculate the amount of servo travel/angle. I have general #'s that I've liked to stay within for the servo arm, bell crank, steering block reduction.....
Quote:
Originally Posted by Josh Cyrul View Post
Radial Ackerman:

Pos. #1 St. Block Inside Wheel degree vs. Outside Wheel Degree

21mm Length 5degree 10degree 15degree 20degree 25degree

9mm Insert 4.72 8.93 12.62 15.81 18.48
10mm Insert 4.71 8.87 12.51 15.62 18.22
11mm Insert 4.69 8.81 12.39 15.43 17.94
12mm Insert 4.67 8.75 12.26 15.22 17.65

22.5mm Length

9mm Insert 4.76 9.07 12.93 16.32 19.21
10mm Insert 4.75 9.03 12.83 16.16 18.98
11mm Insert 4.74 8.98 12.73 15.99 18.74
12mm Insert 4.72 8.92 12.62 15.81 18.49

24mm Length

9mm Insert 4.8 9.21 13.21 16.78 19.89
10mm Insert 4.79 9.17 13.13 16.64 19.69
11mm Insert 4.78 9.13 13.04 16.5 19.48
12mm Insert 4.77 9.08 12.95 16.35 19.26

This is generated using a set wheel base - adjusting wheel base/hinge pin sweep can adjust these #'s. Also, this is generated using 0 toe in/out. This is to generate different ackerman curves.

Generally, lower initial ackerman (closer # values) generate more initial steering and can make the car loose in the center of the corner/exit. Be warned though that at times it can overheat the tires and cause a mid/late race understeer.

Higher initial ackerman makes the car easier to drive, and more balanced through the run. Sometimes though, if you use too much ackerman you will just have slow lap times and a lazy/understeering car. So far, I've prefered the shorter bell crank (21mm) with 9-10 for the ackerman insert as it gives good initial steering and good low speed steering without over heating the front tires so much. Also, this combination is quite close to the ackerman data generated from the 416 I was able to guess some dimensions off of....
Sorry Josh, one more time for the cheap seats... when you say closer values, do you mean the set of 4 values are close i.e. you're preferred setting of 21 and insert 9 will provide more initial steering (and heat risk) to EJ's 22.5 and insert 10?

thanks


Next question, has anyone used the outside hole on the rear hub giving the longest setting for the rear camber link?
__________________
www.facebook.com/mcpheerc
CraigM is offline   Reply With Quote
Old 07-04-2009, 01:55 AM   #1226
Tech Master
 
vr01's Avatar
 
Join Date: Jul 2002
Location: Proud Qld'er in Sydney
Posts: 1,046
Default

Quote:
Originally Posted by CraigM View Post
Next question, has anyone used the outside hole on the rear hub giving the longest setting for the rear camber link?
Craig,

Haven't tried that yet...

However, made the following changes to the kit setup and had the car running very nicely at the Hill last night despite the low grip and cold temps. New layout as well.

Stood up rear shocks one hole to position 2 at the top.
Inside front link from 2.5mm to 1mm
Inside rear link from 1.5mm to 0.5mm
vr01 is offline   Reply With Quote
Old 07-04-2009, 06:23 AM   #1227
Tech Master
 
bender's Avatar
 
Join Date: May 2004
Location: Brisbane
Posts: 1,504
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by vr01 View Post
Stood up rear shocks one hole to position 2 at the top.
Inside front link from 2.5mm to 1mm
Inside rear link from 1.5mm to 0.5mm
Chris, what were you trying to achieve with the above set-up changes?

I debuted my car tonight in similar conditions (very low grip, very cold temps) and to be honest the car was absolute rubbish I was lapping miles away from a competative pace.

The car had a lot of off-power push, especially on the slow turns, but as soon as you got to the apex the car would then spin out. It was also very loose under throttle out of all low speed corners. Overall a very frustrating night and I'm not sure where to begin making changes
__________________
Jason W
FIR#2 - "You can't buy this much talent"
Durango Dex410 - Schumacher Cougar SV - Top Photon
bender is offline   Reply With Quote
Old 07-04-2009, 08:11 AM   #1228
Tech Champion
 
RC MARKET's Avatar
 
Join Date: Feb 2007
Location: HK
Posts: 6,137
Trader Rating: 12 (100%+)
Default

Quote:
Originally Posted by adamge View Post
hehe, I think that's your best post yet, rcmarket !!
& our first lot all is had soft & Hard Spool Outdrive !
RC MARKET is offline   Reply With Quote
Old 07-04-2009, 04:16 PM   #1229
Tech Master
 
Join Date: Sep 2007
Location: Helmond
Posts: 1,544
Default

I don't have the Photon myself but a club member has it now and the car drives grate.
When I see te car go, its incredible stable and it roles great true the corner.

Josh you did a grate job. All the TOP critics are quit now and are only looking and don't dare to say any ting. Others are looking and making compliments about the car.
It's just fun to see them watch and don't dare to say any thing because they now the car is good, very good!!!
I think they want one to but don't dare to buy one because they were first talking like TOP was a cheap car and not a real car.

Thanks to you Josh I can laugh at them and I can't wait till I can buy my car.
Must wait till I get a letter from the tax that I may keep my money!!
When that's ok, I will buy a Photon.
Can't wait.
__________________
http://www.mikky32.com
Tekin RS pro
TOP racing Photon
Tekin Redline 10,5
Protoform LTC-R
mikky32 is offline   Reply With Quote
Old 07-04-2009, 09:21 PM   #1230
Tech Elite
 
mtveten's Avatar
 
Join Date: Jan 2003
Posts: 2,652
Trader Rating: 27 (100%+)
Default

What online dealers are stocking parts & such for the new car?

Mark
mtveten is offline   Reply With Quote
Reply



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 01:09 AM.


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