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04-17-2010, 01:44 AM
| #1 |
| Rock Crawler Join Date: Mar 2009 Location: Victoria BC
Posts: 988
|  should i run a bec?
i know the answer is yes but im hoping i can get away from running one. due to tight spaces set up is.. 4s lipo mmpro single jr8711 18.5 t ballistic motor. im only asking cuz the MMpro has an internal one of 5-7volts, so im hoping since im only running a single servo i can get away with out it. thought / input?? |
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04-17-2010, 01:47 AM
| #2 |
| Rock Crawler Join Date: Sep 2009 Location: Abbotsford BC
Posts: 563
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hard to say, most speed controls dont work well over 2s lipo. you can try without one and see how it works, if it cuts out you will need one.
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04-17-2010, 01:53 AM
| #3 |
| Rock Stacker Join Date: Mar 2009 Location: Basement of Coyote Hobby
Posts: 77
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Servo sucks more than 6 volt? Speed say's 5-7 volt, should be fine! Doe's the speed say 2-cell and 6-volt "OK" , but 3-cell or more "NO"?
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04-17-2010, 01:57 AM
| #4 | |
| Rock Crawler Join Date: Mar 2009 Location: Victoria BC
Posts: 988
| Quote:
straight from the site "Switching BEC powers your radio and servo all the way up to the 6S max input. Users may select the output for any voltage between 5V and 7V." i was just hoping some one had tried my combo befor and could tell me a direct yes or no answer | |
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04-17-2010, 08:55 AM
| #5 |
| I wanna be Dave Join Date: Feb 2009 Location: 20 miles southeeast of downtown Sacramento
Posts: 2,373
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The problem is the internal bec amp output. I believe it is only 3amp (castle kinda pisses me off because they don't really list all the specs), 4s and the 8711 will put a strain on it. Better safe than sorry.  Last edited by oldhippie; 04-17-2010 at 08:59 AM. |
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04-17-2010, 09:12 AM
| #6 | |
| RCC Addict Join Date: Aug 2007 Location: Rohnert Park
Posts: 1,093
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04-17-2010, 11:41 AM
| #7 |
| Rock Crawler Join Date: Mar 2009 Location: Victoria BC
Posts: 988
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yeah i figured as much  just makes my wireing looked cluttered and ugly...you guys sure didnt give me the answer i wanted  |
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04-17-2010, 02:15 PM
| #8 |
| I wanna be Dave Join Date: Feb 2009 Location: 20 miles southeeast of downtown Sacramento
Posts: 2,373
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You knew the answer when ya asked.  Ya could down grad that 8711 for one of these http://www.hobbycity.com/hobbyking/s..._.130sec_/_79g and get rid of the bec.  |
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04-17-2010, 05:50 PM
| #9 | |
| Rock Crawler Join Date: Mar 2009 Location: Victoria BC
Posts: 988
| Quote:
hmm that does seem like i good idea.... maybe i can just wire the servo right to the battery? | |
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04-18-2010, 07:38 AM
| #10 |
| Rock Crawler Join Date: Nov 2009 Location: Southern, IN
Posts: 862
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the holmes hobbies esc can handle up to 6s and has a 5amp bec
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04-18-2010, 08:15 AM
| #11 | |
| TEAM MODERATOR   Join Date: May 2004 Location: Tennessee
Posts: 10,855
| Quote:
Why not just get a Holmes ESC and be done with it....no BEC needed. I run both my trucks that way. | |
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04-18-2010, 11:55 AM
| #12 | |
| Rock Crawler Join Date: Mar 2009 Location: Victoria BC
Posts: 988
| Quote:
because im running a brushless motor. the HH TM, was one of my top pics on this build but i really wanted to try a BL set up this time around. my figureing is if i think this set up is the suxs the MMpro goes into somthing else and i order a TM to replace it.  but with a lil creative thinking i managed to cram all my electronics where i wanted them and not look to shitty lol Last edited by ultimate_monkey; 04-18-2010 at 11:57 AM. | |
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Linear Mode
