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05-25-2013, 12:54 PM | #1 |
Rock Crawler Join Date: Jan 2008 Location: Essex, UK
Posts: 654
| What do you do when a Hitec 7980 and Castle BEC Pro aren't enough?
As title really bought the best gear I could find, thinking it would do the job with ease on my big scale crawler, but it stalls out with ease. Need and even stronger steering setup. Anyone got any ideas? I'm totally stumped Thanks. |
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05-25-2013, 01:13 PM | #2 |
I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough?
What is the CC BEC set to?? If stock, it's under voltage for the 7980. Get a Castle Link & up the voltage. Why do you say, "It's not enough"???? |
05-25-2013, 01:35 PM | #3 |
Rock Crawler Join Date: Feb 2012 Location: Michigan
Posts: 617
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough?
1/4 scale servo on a 3s.
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05-25-2013, 01:55 PM | #4 |
I wanna be Dave Join Date: May 2007 Location: Fairfield ME
Posts: 3,886
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough? |
05-25-2013, 02:03 PM | #5 |
I wanna be Dave Join Date: May 2007 Location: Fairfield ME
Posts: 3,886
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough?
You have as much torque as you are going to get in that size package. You can double up with another 7980 or you can look at the bigger options. Compare servos here: All RC Servos - Servo Database That link should have them organized by torque but if not just click on torque at the top.
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05-25-2013, 02:09 PM | #6 | |
I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough? Quote:
I wanted to know why the OP thought it was underpowered. I was not asking your thoughts. Frankly, if a single 7980 does not do it...there are many other issues....do you agree?? Sheesh, I have enough issues with a 7950 or a external powered BLS197(?) in a 2.2 rig. BTW, a 7980 is already larger than most 2.2 rigs can handle "standard", if a 7980 is not enough (already making mount adjustments), why go even bigger???!!! | |
05-25-2013, 03:02 PM | #7 | |
I wanna be Dave Join Date: May 2007 Location: Fairfield ME
Posts: 3,886
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough? Quote:
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05-25-2013, 03:33 PM | #8 |
Rock Crawler Join Date: Jan 2008 Location: Essex, UK
Posts: 654
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough?
Hi guys, thanks for the replies The CC BEC is set to 7.5volts, so hopefully it's getting enough juice. Thanks for the link for all the different servos, I'll have a look through it and see if there's anything that might do the job. I didn't want to go any bigger servo wise, but it's looking like I might not have any choice. As far as the truck goes, it's got an 18" wheelbase, 40 series wheels and tires, 1/8 scale brushless system, Summit trans, Twinforce axles, solid body with exo cage....And weighs ALOT, lot 32.5lbs. All custom chassis etc, taken along time to build. It's nicknamed Heavy Duty. |
05-25-2013, 04:04 PM | #9 |
Quarry Creeper Join Date: Feb 2011 Location: Germany
Posts: 227
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough?
Buy a Hitec HS-1000SGT Torque @ 11,1 V : 84,0 kg Torque @ 14,8 V : 110,0 kg |
05-25-2013, 04:05 PM | #10 | |
RCC Addict Join Date: Aug 2011 Location: Elkhart
Posts: 922
| Quote:
And hope you find a servo to fit your needs. I'm not schooled on anything bigger than 7980.. Good luck !! | |
05-25-2013, 04:08 PM | #11 |
I wanna be Dave Join Date: Jul 2009 Location: Rancho Relaxo. California. USA. Earth.
Posts: 3,292
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32+lbs?! wow man, a couple 7980's per front wheel perhaps?
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05-25-2013, 07:30 PM | #12 |
I wanna be Dave Join Date: May 2011 Location: Lost in Oregon
Posts: 4,450
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough?
Really 32lbs ???? Pictures of that beast please........ |
05-25-2013, 07:30 PM | #13 |
I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough? |
05-25-2013, 07:35 PM | #14 |
I wanna be Dave Join Date: Jan 2006 Location: Corruptifornia
Posts: 12,107
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough? |
05-25-2013, 07:42 PM | #15 |
RCC Addict Join Date: Oct 2012 Location: Norcal
Posts: 1,261
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough?
Pictures please.....
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05-25-2013, 07:42 PM | #16 |
Pebble Pounder Join Date: Sep 2008 Location: n.e.pa
Posts: 156
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough? |
05-25-2013, 08:46 PM | #17 |
Rock Crawler Join Date: May 2012 Location: Australia
Posts: 517
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough?
How do you have your bec wired? Do you directly power the servo? So plug bec into servo + and - and signal to rx? Or do you use the bec to power the rx then left over power goes to servo? I run a 7980 on either end of my 1/8 crawler and use a bec for each servo. I run the bec straight to the servo. It's a lot better for getting most power. It's worth checking how you have it wired. |
05-26-2013, 12:42 AM | #18 |
Got Worms? Join Date: Jun 2009 Location: Golden, CO
Posts: 6,116
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough?
You might as well throw a hydraulic pump on there and go fullhydro steering at that weight You can try a gear box SPG400A-45 Standard Rotation |
05-26-2013, 01:18 AM | #19 |
Suck it up! Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough? |
05-26-2013, 05:22 AM | #20 | ||||
Rock Crawler Join Date: Jan 2008 Location: Essex, UK
Posts: 654
| Re: What do you do when a Hitec 7980 and Castle BEC Pro aren't enough? Quote:
Quote: Quote:
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I'll sort out some pics for those who want them | ||||
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