R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 08-20-2009, 08:41 AM   #9871
Tech Initiate
 
Shake's Avatar
 
Join Date: Mar 2009
Posts: 25
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by mariob62 View Post
The 3.0 also has exponential, very useful for Mini.
Like where would exponentials apply to Minis?

Steering? If so, what's the thing to use positive or negative exponential?
Shake is offline   Reply With Quote
Old 08-20-2009, 09:33 AM   #9872
Tech Addict
 
Jam-ehz's Avatar
 
Join Date: May 2005
Location: Toronto, Canada
Posts: 592
Trader Rating: 6 (100%+)
Send a message via ICQ to Jam-ehz
Default

Exponential can make your mini less twitchy and sensitive when steering and making quick adjustments.

Different radios interpret positive and negative expo differently, you'd just have to look into your own radio to find out which way to set it.

I myself regard it as negative exponential, to reduce the steering throw at the beginning of the turn.
__________________
-=≡ Tamiya TA05 · TRF415MSX · F103R · M-03R · M-04 · M-05 ≡=-
-=≡ CRC Carpet Knife 3.2 · OFNA LD3 Pro · Fastcats · Spektrum ׀ווlı ≡=-
Jam-ehz is offline   Reply With Quote
Old 08-20-2009, 10:55 AM   #9873
Tech Elite
 
niznai's Avatar
 
Join Date: Feb 2009
Location: All over the place
Posts: 2,744
Default

Quote:
Originally Posted by Jam-ehz View Post
....
Different radios interpret positive and negative expo differently, you'd just have to look into your own radio to find out which way to set it.
.....
That would be lame, but I regret to say, it may be true.
Think of it this way.
An exponential is a function that varies very little around 0 (zero=rest or neutral position) and a lot at extreme values (an example is y=e^x) whereas a logarithmic function varies a lot around 0 and very little at higher values (y=lnx).

Some radios (and manuals) will talk about and display "exp", others "ln". These I suppose are short for "exponential" and "logarithmic" (or they should be). Both will scroll from negative (-100%) to positive (+100%) values, meaning probably that say a radio with "exp" applies an exponential response curve when values are positive (say +10%) and a logarithmic response curve when values are negative (say -10%). Of course, when the value is zero, the response wil be linear. The response curves are in reverse of course when the radio talks about "ln". I think this is where the feeling that different radios interpret differently "positive" and "negative" (exponential) comes from.

Clear as mud?
__________________
Team Greasy Weasel

The best upgrade to any car is some driver skill.
niznai is offline   Reply With Quote
Old 08-21-2009, 07:14 AM   #9874
Tech Initiate
 
Shake's Avatar
 
Join Date: Mar 2009
Posts: 25
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by niznai View Post
That would be lame, but I regret to say, it may be true.
Think of it this way.
An exponential is a function that varies very little around 0 (zero=rest or neutral position) and a lot at extreme values (an example is y=e^x) whereas a logarithmic function varies a lot around 0 and very little at higher values (y=lnx).

Some radios (and manuals) will talk about and display "exp", others "ln". These I suppose are short for "exponential" and "logarithmic" (or they should be). Both will scroll from negative (-100%) to positive (+100%) values, meaning probably that say a radio with "exp" applies an exponential response curve when values are positive (say +10%) and a logarithmic response curve when values are negative (say -10%). Of course, when the value is zero, the response wil be linear. The response curves are in reverse of course when the radio talks about "ln". I think this is where the feeling that different radios interpret differently "positive" and "negative" (exponential) comes from.

Clear as mud?

Indeed

Thanks for the explanation. I´ve been using my 2pm 2.4 radio for some time and I wasn't clear about this.. Once in a race I tried moving the settings on the exponential to 40% positive, and the car handled like crap specially on straights, so I decided, leave the thing at 0% and it would be better....

Gracias!
Shake is offline   Reply With Quote
Old 08-21-2009, 07:45 AM   #9875
Tech Initiate
 
Shake's Avatar
 
Join Date: Mar 2009
Posts: 25
Trader Rating: 1 (100%+)
Default

Another question...

Here in Mexico, we´re about to have the second edition of the 24 hours of Malinalco (yes 24 hours). The thing is some drivers are pushing to run the race with the new m05. My thought is that we know how the m03 handles and the spare parts needed.

If we would happen to run short on spare parts, we could easily take them off from our others m03 and we would still be able to keep on the race. On the other hand, I think there aren´t that many spare parts compatible between both models (chassis is different, uprights, c hubs etc etc).

If it was you, what would you be running the stunning fast m05, or the reliable m03.

Also, I wouldn't ask the organizers just to let the m05 or m03 but instead both mixed......

Any thoughts on this?
Shake is offline   Reply With Quote
Old 08-21-2009, 08:20 AM   #9876
Tech Champion
 
monkeyracing's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2008
Location: SnowMexico
Posts: 5,842
Trader Rating: 10 (100%+)
Default

I don't really believe that the M-05 is much, if any, faster than the M-03. It's just a little different and that difference fits the style of some drivers.

The differences in the various M chassis are outweighed by setup and driving skill. EG: The M-04 is faster than the M-03 in many respects. We'll have a starting grid at our club for the A main that's made up of five M-04s and one M-03. The guy driving the M-03, being an amazingly good driver, will often leave the M-04s in his dust, even though he's geared lower and weighs a bunch more. It's all about the driver.

As for compatibility, most everything switches over from the 3 to the 5. The one big exception for the suspension is the upper control arms at the front of the chassis, but they don't break very often anyway.

I think that for an endurance race where repair time might be a factor that an M-03 would be a wiser choice, as it is easier to open up and repair quickly. The M-05 isn't hard to open up, it's just a little more time consuming.

Jim
__________________
Stab it and steer.
monkeyracing is offline   Reply With Quote
Old 08-21-2009, 10:56 AM   #9877
Tech Elite
 
niznai's Avatar
 
Join Date: Feb 2009
Location: All over the place
Posts: 2,744
Default

Does anyone know if there is a TRF shock set for the minis? Perhaps a part number? Also, if there is one, what is the total length of the shock (eyelet to eyelet)?

And lastly, do these shocks use the same assortment of springs as the touring cars from Tamiya (or do they have a different line of springs, perhaps shorter)?
__________________
Team Greasy Weasel

The best upgrade to any car is some driver skill.
niznai is offline   Reply With Quote
Old 08-21-2009, 11:09 AM   #9878
Tech Initiate
 
Shake's Avatar
 
Join Date: Mar 2009
Posts: 25
Trader Rating: 1 (100%+)
Default

All what you asked I don't know, but the part number is 54000
Shake is offline   Reply With Quote
Old 08-21-2009, 11:22 AM   #9879
Dan
Tech Elite
 
Dan's Avatar
 
Join Date: Oct 2001
Posts: 4,193
Trader Rating: 40 (100%+)
Default

I have one O-ring limiter inside the shock shaft, and measuring with calipers from the very top of the eyelet to the bottom and fully extended, its about 54mm.

They use the short spring set from Tamiya. They are pretty inexpensive. The "yellows" and "blues" are supplied with the 54000 shock set even though they are colored white. They have markings on them though.
Dan is offline   Reply With Quote
Old 08-21-2009, 11:28 AM   #9880
Tech Elite
 
niznai's Avatar
 
Join Date: Feb 2009
Location: All over the place
Posts: 2,744
Default

Thank you, people.
__________________
Team Greasy Weasel

The best upgrade to any car is some driver skill.
niznai is offline   Reply With Quote
Old 08-23-2009, 01:26 AM   #9881
Tech Elite
 
t4m1y4niac's Avatar
 
Join Date: Feb 2006
Posts: 4,309
Default

guys, what is the "wt" size of the Clear Tamiya Oil Shock that include in the M-05Pro Kit.
__________________
SABRE S4 by TOP RACING....
t4m1y4niac is offline   Reply With Quote
Old 08-23-2009, 01:43 AM   #9882
Tech Master
 
mild seven's Avatar
 
Join Date: Mar 2005
Location: Australia
Posts: 1,031
Trader Rating: 60 (100%+)
Send a message via MSN to mild seven
Default

if its the yellow oil its 40wt and the clear oil is 50wt, im pretty sure
mild seven is offline   Reply With Quote
Old 08-24-2009, 10:24 AM   #9883
Tech Initiate
 
Shake's Avatar
 
Join Date: Mar 2009
Posts: 25
Trader Rating: 1 (100%+)
Default

Does anybody know if this Ball Ends would fit the steering linkage?

I just bought a Kimbrough SS and I would like to make my steering with zero slop...

Thank you....
Attached Thumbnails
Tamiya mini cooper-ballends.jpg  
Shake is offline   Reply With Quote
Old 08-24-2009, 12:04 PM   #9884
Tech Adept
 
Starteur's Avatar
 
Join Date: Jan 2008
Posts: 240
Trader Rating: 1 (100%+)
Default

I would suggest Tamiya p/n 53601 Low friction adjuster

That's what I run and I have no problem and it snaps over the ball very good.


__________________
Ride it like you stole it!!!!!!

Tamiya TRF417V5 SEDAN Racer - Tamiya 416X VTA Racer - Tamiya TRF 416X USGT Racer -Tamiya M05 V2 PRO Racer.
Starteur is offline   Reply With Quote
Old 08-24-2009, 08:50 PM   #9885
Tech Initiate
 
Shake's Avatar
 
Join Date: Mar 2009
Posts: 25
Trader Rating: 1 (100%+)
Default

Thanks a lot Starteur....I just ordered a couple of them...
Shake is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tamiya Mini Cooper M-03L Hop-ups mini71 R/C Items: Wanted to Buy 4 05-04-2016 11:07 AM
Tamiya Mini Cooper mach51 R/C Items: Wanted to Buy 10 09-02-2011 12:08 AM
FS:TAMIYA Mini Cooper, TA 04S rthmotorsports R/C Items: For Sale/Trade 4 10-20-2007 09:37 PM
Tamiya 415 MSX and M03 Mini Cooper F/S Racer X79 R/C Items: For Sale/Trade 14 12-22-2006 07:38 AM
Tamiya M01,02,03, or 04 Mini Cooper ccugolf.com R/C Items: Wanted to Buy 2 12-05-2004 08:55 PM


Tags
m03, m03r ules, m05, mini, tamiya


Currently Active Users Viewing This Thread: 2 (0 members and 2 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 11:26 AM.


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

SEO by vBSEO 3.5.0