Go Back   RCCrawler Forums > Competitions and Events > U4RC
Loading

Notices

Thread: Servos for rock racing?

Reply
 
LinkBack Thread Tools Display Modes
Old 04-02-2014, 08:27 PM   #1
Pebble Pounder
 
Join Date: Jul 2013
Location: San Bernardino
Posts: 112
Question Servos for rock racing?

Hey everyone what servos are you running for steering? I'm in the process of looking for a servo for my wraith and twin hammers. I do not really care for the best because the best costs a lot and do not want to spend a lot unless thats the only option. Something with pretty good torque and speed but the main thing I want is for it to last a while. A servo that does not get a ton of play after a couple of races would be nice.

Thanx in advance
iacdmac is offline   Reply With Quote
Sponsored Links
Old 04-02-2014, 08:49 PM   #2
Rock Crawler
 
Join Date: Feb 2012
Location: OC
Posts: 616
Default Re: Servos for rock racing?

HiTec is really a good brand, yes it is expensive(relative), but even builders like HH are having teething problems (Turnigy 910, included), if you want to experiment with trying to find the best servo for the price then there are alot of options and even if they are only 20-30 $ each (Solar, etc.). I am sure some will last, but under the grueling conditions of rock racing and the inevitability of it getting hit (impact/shots to the servo/impacts to the arm, etc.), they won't last. Anyway after 3 servo's @ $30ea, your there 7954.

Look at all the servos at the next race, take a count of what is out there, I bet 1-2 Futaba, maybe a HH, but a majority Hitec.

IMO....
TheAxialNut is offline   Reply With Quote
Old 04-02-2014, 09:14 PM   #3
RCC Addict
 
Join Date: Aug 2007
Location: Burbank
Posts: 1,189
Default Re: Servos for rock racing?

Just spend the money......
The Doc is offline   Reply With Quote
Old 04-02-2014, 09:15 PM   #4
I wanna be Dave
 
Join Date: May 2007
Location: Fairfield ME
Posts: 3,886
Default Re: Servos for rock racing?

Ti gear Hitec for the win!
Calderwood is offline   Reply With Quote
Old 04-02-2014, 10:23 PM   #5
Pebble Pounder
 
Join Date: Jul 2013
Location: San Bernardino
Posts: 112
Default Re: Servos for rock racing?

So 7954 is the one to get?
iacdmac is offline   Reply With Quote
Old 04-02-2014, 10:25 PM   #6
RCC Addict
 
Join Date: Aug 2007
Location: Burbank
Posts: 1,189
Default Re: Servos for rock racing?

I run the 7940 in the Beast....
The Doc is offline   Reply With Quote
Old 04-02-2014, 10:25 PM   #7
I wanna be Dave
 
Join Date: May 2007
Location: Fairfield ME
Posts: 3,886
Default Re: Servos for rock racing?

Quote:
Originally Posted by iacdmac View Post
So 7954 is the one to get?
7954 is steel geared. 7955, 7950, 7980, 7990 are all Ti geared.
Calderwood is offline   Reply With Quote
Old 04-02-2014, 10:46 PM   #8
Rock Crawler
 
Join Date: Feb 2012
Location: OC
Posts: 616
Default Re: Servos for rock racing?

Also the "new" 8380th....the new one I am trying out....specs;
HS-8380TH
@6V= .15sec/60' 402.73oz-in
@7.4V= .13sec/60' 486.05oz-in
Servo Weight: 2.4oz
Dimensions: 40 x 20 x 38mm (standard size)

I think i heard that the motors are BL in the servo and thats why they can perform so well and yet don't need HV. Not sure on that one though....he said she said. But the specs above are from the back of the packaging from the servo container.
TheAxialNut is offline   Reply With Quote
Old 04-03-2014, 09:16 AM   #9
RCC Addict
 
Join Date: Jul 2006
Location: So Cal USA
Posts: 1,109
Default Re: Servos for rock racing?

Hitec 7950 in IMO, but honestly, no matter what servo you run, you hit it hard enough the wrong way, its gonna break!
Ive gone through 3 $100+ servos in 8 race events, my advice, PROTECT YOUR SERVO the best way possible AND drive better!
Good luck!
KRAWLR4life is offline   Reply With Quote
Old 04-03-2014, 09:23 AM   #10
Pebble Pounder
 
Join Date: Jul 2013
Location: SoCal
Posts: 120
Default Re: Servos for rock racing?

I use the solar d772. I am on my 2nd one from running both u4rc series.
indysand is offline   Reply With Quote
Old 04-03-2014, 09:33 AM   #11
I wanna be Dave
 
Join Date: Apr 2004
Location: SoCal
Posts: 5,027
Default Re: Servos for rock racing?

Quote:
Originally Posted by indysand View Post
I use the solar d772. I am on my 2nd one from running both u4rc series.
Twin hammers is pretty light. I have never blown a servo in mine. My 8lb 2.2 Trophy rig is another story.
Rockpiledriver is offline   Reply With Quote
Old 04-04-2014, 10:36 AM   #12
www.ottsix.com
 
Join Date: Mar 2011
Location: Albuquerque, New Mexico USA
Posts: 2,050
Default Re: Servos for rock racing?

I've been trying to figure out how to make a servo saver for a 4 link setup...no luck yet.
crawl-o-matic is offline   Reply With Quote
Old 04-04-2014, 12:17 PM   #13
Y-Town Crawlers
 
Del Monte's Avatar
 
Join Date: Oct 2005
Location: Not Hesperia
Posts: 2,481
Default Re: Servos for rock racing?

I've been running the same Futaba BLS157v in my Wraith for almost 2 years. My truck is light now, but it was 6.5lbs for the first year.

Like everyone else has said, spend the money! Breaking a bunch of $30 servos adds up fast.
Del Monte is offline   Reply With Quote
Old 04-04-2014, 01:22 PM   #14
I wanna be Dave
 
Join Date: May 2007
Location: Fairfield ME
Posts: 3,886
Default Re: Servos for rock racing?

Quote:
Originally Posted by crawl-o-matic View Post
I've been trying to figure out how to make a servo saver for a 4 link setup...no luck yet.
Why not just run one of the savers the clod race trucks use?

Crawford Performance Engineering : CPE-SER6: Kimbrough Heavy-Duty Servo Saver - $6.99

Crawford Performance Engineering : CPE-SER3: Ofna Heavy-Duty Servo Saver - $8.99
Calderwood is offline   Reply With Quote
Old 04-04-2014, 03:01 PM   #15
I wanna be Dave
 
Join Date: Dec 2006
Location: Goin broke losing weight.....
Posts: 2,262
Default Re: Servos for rock racing?


You think either of those will last with plastic splines? These rigs take a beating on track, not just a couple jumps here and there lol
Erin is offline   Reply With Quote
Old 04-04-2014, 03:17 PM   #16
I wanna be Dave
 
Join Date: May 2007
Location: Fairfield ME
Posts: 3,886
Default Re: Servos for rock racing?

Quote:
Originally Posted by Erin View Post
You think either of those will last with plastic splines? These rigs take a beating on track, not just a couple jumps here and there lol
They have plastic splines but the spring is protecting them. A cartwheeling brushless clod with wide wheels and spacers isn't exactly easy on steering components.
Calderwood is offline   Reply With Quote
Old 04-05-2014, 01:29 AM   #17
RCC Addict
 
Join Date: Oct 2006
Location: crawlifornia
Posts: 1,612
Default Re: Servos for rock racing?

Quote:
Originally Posted by crawl-o-matic View Post
I've been trying to figure out how to make a servo saver for a 4 link setup...no luck yet.

I've been trying to think up a way to put heavy springs inside of a tie rod, so the steering will still work on the rocks, but in heavy hits like cartwheels, etc. the springs will take some of the hit of the servo gears... it would most likely only need 1/4-1/2 in. of travel or so to be effective.
rockhugger is offline   Reply With Quote
Old 04-05-2014, 10:41 AM   #18
Quarry Creeper
 
Join Date: Mar 2013
Location: Hampton Roads
Posts: 265
Default

Savox 1230. Steel gears, 500oz of torque. 6V.

Unlike the 7954 & 7955 it doesn't have a weak link "carbonite" gear that will strip and ruin the brass motor output gear. Yes the titanium gear set still uses the carbonite gear making the Ti aspect nothing more then a marketing gimmick. I've owned two and have been disappointed.

If you need something slightly faster give the savox 1231 a try.

I put 14 hours of run time on both of mine almost every weekend.

Take it for what it's worth. Look through my build threads below for information on hitec and savox servos torn apart, waterproofing aspects, stripped gears etc.

I'm not a fanboi, I seek function and durability.
MIKO is offline   Reply With Quote
Old 04-05-2014, 11:22 AM   #19
Jerry's RC Garage
 
Join Date: Apr 2010
Location: lake forest
Posts: 403
Default

Quote:
Originally Posted by MIKO View Post
Savox 1230. Steel gears, 500oz of torque. 6V. Unlike the 7954 & 7955 it doesn't have a weak link "carbonite" gear that will strip and ruin the brass motor output gear. Yes the titanium gear set still uses the carbonite gear making the Ti aspect nothing more then a marketing gimmick. I've owned two and have been disappointed. If you need something slightly faster give the savox 1231 a try. I put 14 hours of run time on both of mine almost every weekend. Take it for what it's worth. Look through my build threads below for information on hitec and savox servos torn apart, waterproofing aspects, stripped gears etc. I'm not a fanboi, I seek function and durability.
have you tried them in rock racing very different from scaling or bashing. I run 7955 I have a couple little problem but with the warranty I just send it in and they fix with no questions.
jerry2575 is offline   Reply With Quote
Old 04-05-2014, 12:40 PM   #20
www.ottsix.com
 
Join Date: Mar 2011
Location: Albuquerque, New Mexico USA
Posts: 2,050
Default Re: Servos for rock racing?

Quote:
Originally Posted by Calderwood View Post
They have plastic splines but the spring is protecting them. A cartwheeling brushless clod with wide wheels and spacers isn't exactly easy on steering components.
I was thinking more along the lines of an aluminum bellcranck of some sort...but coupling it with this sort horn style servo saver would be even better
crawl-o-matic is offline   Reply With Quote
Reply



Servos for rock racing? - Similar Threads
Thread Thread Starter Forum Replies Last Post
When did Rock Crawling become Rock Racing? jetboat Chit Chat 66 01-27-2011 07:57 AM
**Rock Beetle-Extreme rock racing rig** nitromtcrawler General Crawlers 60 10-31-2009 01:24 AM
airtronics 94361 Rock crusher servos chimney Electronics 3 01-10-2007 04:36 PM
Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 08:14 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.
Copyright 2004-2014 RCCrawler.com