R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 02-14-2008, 04:38 PM   #16
Tech Master
 
Join Date: Aug 2004
Location: Sunnyvale, Ca
Posts: 1,293
Default

Quote:
Originally Posted by garen View Post
nice ponytail!
Cute, eyh!

Like your new site - very nice!
Rich Browne is offline   Reply With Quote
Old 02-14-2008, 05:22 PM   #17
Tech Addict
 
fraz's Avatar
 
Join Date: Mar 2002
Location: Santa Cruz, CA
Posts: 653
Send a message via AIM to fraz
Default

Quote:
Originally Posted by meronr View Post
that car definitely boogies....just need to put a little speaker on it so it sounds like a nitro car lol:
When Rick and I had talked about this car we both thought 2-speed would be super cool to get working. Imagine that sound...

Zzzzzzzzzzzzzzz...CLICK...zzzzzzzzzzzzzzzzzzzzzz

Hey Rick have you scrapped the 2-speed idea altogether or is it still cookin'?
fraz is offline   Reply With Quote
Old 02-15-2008, 03:52 PM   #18
Tech Regular
 
Lil Paul's Avatar
 
Join Date: Mar 2006
Posts: 265
Default Awesome

Car looks great. I have a friend with almost the same setup, but he used an MRX4. He has been trying to get it to work with the 2 speed, and have had no luck. the problem is getting the clutchbell properly mounted onto the output shaft of the brushless motor. whatever mods are done to get it on the shaft never works because it ends up being off balance and the vibration snaps the shaft. He has gone through 2 brushless motors....
Lil Paul is offline   Reply With Quote
Old 02-15-2008, 04:45 PM   #19
Tech Champion
 
Join Date: Sep 2002
Location: Chicago Illinois USA
Posts: 9,107
Trader Rating: 16 (100%+)
Send a message via ICQ to Solara Send a message via AIM to Solara
Default

Quote:
Originally Posted by Lil Paul View Post
Car looks great. I have a friend with almost the same setup, but he used an MRX4. He has been trying to get it to work with the 2 speed, and have had no luck. the problem is getting the clutchbell properly mounted onto the output shaft of the brushless motor. whatever mods are done to get it on the shaft never works because it ends up being off balance and the vibration snaps the shaft. He has gone through 2 brushless motors....
I am not sure why he would need to mount the CLUTCH onto the brushless motor..? Electric motor can be completely stand still without idling...(compare to nitro engine).

Also, 2-speed is probably for NITRO only.....the 2-speed car that I was was absolutely horrible, very very slow on 1st gear and suddenly kicks in and get fast but has to brake...I don't think 2-speed is needed. Just need the right spur/pinion, a fast motor, and lots of LIPO.
Solara is offline   Reply With Quote
Old 02-15-2008, 04:51 PM   #20
Tech Master
 
Taylorm's Avatar
 
Join Date: Nov 2006
Location: Monclova, Ohio
Posts: 1,647
Default

Quote:
Originally Posted by Lil Paul View Post
Car looks great. I have a friend with almost the same setup, but he used an MRX4. He has been trying to get it to work with the 2 speed, and have had no luck. the problem is getting the clutchbell properly mounted onto the output shaft of the brushless motor. whatever mods are done to get it on the shaft never works because it ends up being off balance and the vibration snaps the shaft. He has gone through 2 brushless motors....
..why not machine a "hub" that you could have the first and second gear pinons thread onto..........you don't need any portion of the clutch...............
__________________
Current stable... Team Associated SC8, Team Associated RC250 X 3
Tamiya F104X1...Tamiya F104W GP Edition...BMT/RC300 Frankenstein.....Edam Razor2
Checkers or Wreckers......................................................................................
Taylorm is offline   Reply With Quote
Old 02-16-2008, 03:36 AM   #21
Tech Champion
 
Roelof's Avatar
 
Join Date: Aug 2007
Location: Holland
Posts: 6,287
Send a message via ICQ to Roelof
Default

There are people making it bigger:
http://www.bigscale-trucks.be/electric.php

http://www.bigscale-trucks.be/media/.../electro_2.mpg
__________________
The quality of an answer comes with the quality of the question.
Roelof is offline   Reply With Quote
Old 02-16-2008, 09:57 PM   #22
moy
Tech Master
 
moy's Avatar
 
Join Date: Nov 2006
Location: 818's
Posts: 1,043
Trader Rating: 4 (100%+)
Default

awsome car..
moy is offline   Reply With Quote
Old 02-18-2008, 12:47 AM   #23
Tech Master
 
YoDog's Avatar
 
Join Date: Aug 2006
Location: Lompoc, Ca.
Posts: 1,686
Trader Rating: 26 (100%+)
Default

WOW!
Quite the response...
Well guys, I expected most of these questions would come up.
First off, the gearing was a bit too tall for the setup (single speed). It caused the speedo to go into thermal protection under hard driving. It came with a fan which I left off for the time being (some of the still pics show the fan installed). I was only able to fit a pair of 4s 2200mah LiPo packs in parallel within the narrow confines of the chassis and top plate.
I'm not sure what the run times actually are yet because this was the first run at speed. I am anticipating 6 to 7 minutes with this pack. I will have better data from the next race.

I am hoping to keep advancing this project and ultimately produce a complete kit that will be very much at home on big nitro tracks all over.

If can drum up some factory intrest, maybe a car in kit form may become a reality sooner rather than later.
I'm sure that with the right combination of motor, speed control and batteries we could see a high speed class that can be run indoors and won't piss off the neighbors in those noise sensitive areas.
I have been hearing rumors of a high voltage motor system comming out from Castle Creations soon and that may be the ticket for these cars.

Thanks again for all the interest!

Rick
YoDog is offline   Reply With Quote
Old 02-18-2008, 01:07 AM   #24
Tech Master
 
YoDog's Avatar
 
Join Date: Aug 2006
Location: Lompoc, Ca.
Posts: 1,686
Trader Rating: 26 (100%+)
Default

I forgot to mention my findings on the whole 2 speed issue.
It would be nice to make a 2 speed work but the problem is not so much how do we attach the gears to the motor but how do we stop the car. you see, the two speed is designed to free wheel in reverse, that whole one way bearing thingy.
If I can figure out a way to make the 2sp clutch stay engaged when braking and then release when power is re-applied (consistently), the rest is easy. Otherwise I'd have to keep the disc brake mechanism but who want's to add the extra complexity when the motor does such a great job at slowing the vehicle to begin with. There's not enough room anyways...

The debate is a little missdirected but it's great to hear the ideas flowing.
YoDog is offline   Reply With Quote
Old 02-18-2008, 01:38 AM   #25
Tech Champion
 
Roelof's Avatar
 
Join Date: Aug 2007
Location: Holland
Posts: 6,287
Send a message via ICQ to Roelof
Default

Take a look at the Schumacher Menace GTR, its an 1/8 onroad with an 3 speed gearbox, they did mount a servo with a normal brakedisc.
__________________
The quality of an answer comes with the quality of the question.
Roelof is offline   Reply With Quote
Old 02-18-2008, 02:14 AM   #26
Tech Master
 
YoDog's Avatar
 
Join Date: Aug 2006
Location: Lompoc, Ca.
Posts: 1,686
Trader Rating: 26 (100%+)
Default

That's fine but you really can't compare the two types of cars.
There is plenty of room on those shaft drive cars.
If I were intersted in bashing about, I would have preferred to go that route rather than the MRX. I wanted to build a car that could theoretically compete with what is concidered to be the very pinnacle of RC car technology.
F1 of the RC world if you will...

You've seen the video, right?
Those GTR cars can't even come close to the all out handling and speed of a properly set up 1/8th onroad racer, electric or nitro.

Thanks for the suggestion though.
YoDog is offline   Reply With Quote
Old 02-19-2008, 06:38 PM   #27
Tech Master
 
Motorman's Avatar
 
Join Date: Nov 2001
Location: Michigan
Posts: 1,911
Trader Rating: 1 (100%+)
Default

8
__________________
Just here to give the world grief.

Last edited by Motorman; 03-26-2008 at 06:06 PM.
Motorman is offline   Reply With Quote
Old 02-19-2008, 06:47 PM   #28
Tech Master
 
Motorman's Avatar
 
Join Date: Nov 2001
Location: Michigan
Posts: 1,911
Trader Rating: 1 (100%+)
Default

8
__________________
Just here to give the world grief.

Last edited by Motorman; 03-26-2008 at 06:05 PM.
Motorman is offline   Reply With Quote
Old 02-20-2008, 01:37 PM   #29
Tech Regular
 
Join Date: Jan 2006
Posts: 376
Default

twin motors one in front and one in the rear that would be sweet
8lackflagracing is offline   Reply With Quote
Old 02-25-2008, 02:37 PM   #30
Tech Master
 
Motorman's Avatar
 
Join Date: Nov 2001
Location: Michigan
Posts: 1,911
Trader Rating: 1 (100%+)
Default

bump
__________________
Just here to give the world grief.
Motorman is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
***Brushless 1/8 onroad video*** CountryHick Australian Racing 26 03-27-2009 11:40 PM
Brushless ST-RR video Shark413 Electric Off-Road 6 06-04-2008 02:04 AM
Brushless CRT.5 - video Shark413 Electric Off-Road 4 06-03-2008 12:33 PM
***Brushless 1/8 onroad video*** CountryHick Nitro On-Road 20 03-01-2008 12:34 PM
**Brushless 1/8 onroad video** CountryHick Electric On-Road 4 02-25-2008 06:59 PM



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 06:47 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net