Ok guys I'm a believer now! - Page 3 - RC-Monster Forums

coolhandcountry · 10.30.2006, 09:52 AM

Ok. I ran the ubec on a futuba 75 with great luck. I wonder if some radios
are closer to the frequency of the ubec. Kind of like the esc are more
to interference with some.

BrianG · 10.30.2006, 01:08 PM

It's possible some radios have a narrower band filter and sharper cutoff slope than others. This would allow less "noise" to enter the circuits.

crazyjr · 10.30.2006, 06:33 PM

I ran it today with a recieverpack and the middle wire removed from the plug, It runs fine now. Run a whole pack without a problem, so I'll be looking at UBEC's next time i go to the rc plane shop. So, please call out what you have run and the results you have with them, so i can see what they have and what works (would buy from Mike, but got to support the locals first:027: ).

Ok, next thing. Running it today it runs good, but needs a little more speed. My temps for one pack run are:
Motor; 119*f
esc; 159*f
batteries; 129*f
No fans used and temp outside was 76*, can I gear up without trouble? I'll add a fan, as soon as i get a chance from radio shack, Any recommendations on voltage to look at for fans? The acceleration is strong and i don't think the motor is even trying.
Thanks once again and sorry for all the questions

neweuser · 10.30.2006, 06:36 PM

First, I would get the ubec from Mike, I have had the best performacne from those. Fans-go with 5v fans, they push real good air.

crazyjr · 10.30.2006, 06:41 PM

The plane shop near me has Koolpower UBEC's, If they don't have that one I'll get it from mike

glassdoctor · 07:23 PM

I like to run 12V fans right off the battery leads. I soldered in a rx/servo connector right on the mamba's main wire tabs outside the case, with about 1" wire leads. So I can plug in a fan or ubec right at the esc.

Fans vary in output and you don't know till you try one. Some are weak and some kick butt, both 12V and 5V... imo one is not "better" than the other. It just depends on the particular fan you try.

I think you can gear up no problem... you don't really know until you experiment to find where the breaking point is.

A fan on the mamba will help a lot if temps jump with a gear change.

160's is not bad at all.... CC says the temps were 220+ when they got them to thermal, and it won't damage the esc either.

crazyjr · 10.30.2006, 08:57 PM

I got an 18 right now and can get up to a 20 from Mike, Can Mike make 32 pitch gears bigger than a 20?

squeeforever · 10.30.2006, 09:14 PM

I believe so.

crazyjr · 10.31.2006, 11:37 PM

I run it today as well, found out the slipper was too loose and prevented the wheelies from happening, now it won't keep the front wheels down for a good run without real careful throttle control. This is with a 5 cell battery pack in the front, its going to be a real handful when i go UBEC. thanks for the help guys.
The track i go to has closed up but the owner is going to set up another track in a different area and let the business side of it die. I'm going to wait till the track is done before i decide on gearing

11.01.2006, 03:35 AM

Could you post some pics or videos im thinking of doing the same setup with 14 cells!

crazyjr · 09:37 PM

No vid camera yet but will try to get some pics up when i get the Ubec in. With 12 cells and 17/66 32 pitch in it, it runs at about 25 to 30. according to BrianG's speed calculator it should be running 21, but it feels faster.

Edit: Got to run on the track today, track is officially closed, but the owner was there and let me so he could see how it run.
Right now its perfect for racing, good power and the natural handling of the G2R make a perfect pair, ran for ten minutes and everything was touchable, but warm, Impressive considering i don't have fans on it. as the batteries started to fade i took it into the parking lot and could still flip on its top easily. The track owner said there should be a law against that kind of power, but so long as there isn't, he might get one. :005:

crazyjr · 11.02.2006, 07:28 PM

Ok, got a couple koolflight UBEC's, one for the mamba and another for the mgm i got for another project. Can i set up the UBEC on the wires on the circut board of the mamba(red to red, black to black) I'm running the mamba without a series adapter, battery wires on different deans plugs with a jumper connecting them. Would it be ok to setup the UBEC wires under where the battery wires mount to the esc? I intend to set up a plug to make them detachable.

BrianG · 11.02.2006, 08:10 PM

That'll work. Although you might void the warranty.

Finnster · 11.02.2006, 09:28 PM

Quote:

Originally Posted by crazyjr

Ok, got a couple koolflight UBEC's, one for the mamba and another for the mgm i got for another project. Can i set up the UBEC on the wires on the circut board of the mamba(red to red, black to black) I'm running the mamba without a series adapter, battery wires on different deans plugs with a jumper connecting them. Would it be ok to setup the UBEC wires under where the battery wires mount to the esc? I intend to set up a plug to make them detachable.

That's what I did with a Deans micro plug. Actually did two, the other one for a 12V fan originally.

OTOH, I set out to void the warr. :eek: