RCCrawler Forums

jsudar · 08-10-2006, 11:42 PM

I picked up and AXI 2808/20 brushless and a kontronik Jazz 40-6-18 speed control for a fairly reasonable price. My question is: will this dinky little motor haul my nine pound Maxx crawler around? This is my first brushless setup, so I have very little experience with them. My truck still has stock maxx tires and I am currently running a 76T spur. I can't use a 9T pinion with this motor since it has a 4mm shaft and I rather drill a pinion than turn the shaft down (resale value, in case it won't work.) Is it worth my time to fab a motor plate and drill a couple pinions or will I just be disappointed and wish I had stuck with lathe motors?

Don't flame me too bad. I'm new at this.

Thanks for the help.

John Deere · 08-10-2006, 11:59 PM

It should work. All I know is try it. Let some of the other guys post before you try it though. I would be safe to beat it will work though. Only way it aint gonna work is if its for a 1/18 scale r/c.

jsudar · 08-11-2006, 12:17 AM

After reading the brushless tutorial thread again, it sounds like some of you are running some fairly heavy rigs with the HH revolver and the mamba. Since my kontronik speedo is rated at 40 amps and the mamba is 25, does that mean I will be okay if the motor is a little overworked?

microgoat · 08-11-2006, 05:48 AM

I've got a little Park 400 in a 7-pounder, and it barely gets warm. The Mamba's not working hard, either, on 8 cells. You should have no trouble at all. Drill the pinion and let it rip.

JohnRobHolmes · 08-11-2006, 11:59 AM

Yep yep. Give her a shot. I would suggest getting the 84 or 87t spur, but that is just so you will have plenty of gear ratio to choose from.

The mamba 25 is plenty for that motor, your Jazz will work just fine too. Keep an eye on the motor heat, dont let it get above 180c. I doubt it will get over 130f, but it never hurts to be cautious.

Stay with your stock maxx tires or maxx mashers. Dont get huge tires with that motor. You will need a longer can motor to push the super tall tires.

jsudar · 08-11-2006, 10:46 PM

Thanks for the help guys. I'd rather ask some questions than burn up some expensive parts (though I didn't pay too much for them.) I think I'll try one of those Chris Fine pinions to save me trip to my buddy's machine shop so I can get back on the rocks more quickly. Thanks again.

jsudar · 11-28-2006, 01:16 PM

I'm digging up this thread again because I rebuilt my crawler and now it is bigger and heavier than before. I'm pretty sure my little AXI is not up to the job. I'd like my rpm/volt to stay about the same, but what makes a brushless motor more powerful? Is it the length of the can or the diameter?

JohnRobHolmes · 11-28-2006, 01:39 PM

Both length and diameter make the power of a motor. What tires are you running now?

microgoat · 11-28-2006, 03:00 PM

I made mine bigger and heavier, too, and the motor doesn't care. I bet that Mog is ten pounds now, with six wheels, and the motor is as happy as it ever was.

hawaiiankrawler · 11-28-2006, 07:26 PM

Quote:

Originally Posted by microgoat

I've got a little Park 400 in a 7-pounder, and it barely gets warm. The Mamba's not working hard, either, on 8 cells. You should have no trouble at all. Drill the pinion and let it rip.

eh bro i got the same set up but my mamba cogs so i updated the file but it still cogs do u know ur programing

microgoat · 11-28-2006, 07:45 PM

Try low or lowest timing, and high starting power. Usually does the trick for me.

drksyd · 11-29-2006, 04:21 AM

Outrunners should be run with high/hard starts but that's meant for planes. With gearboxes you want a soft start so you don't hammer the gears. I would say go with the soft start and turn up the punch control. Lesser quality batteries can cause cogging as well. Go lipo and get some long runtimes.

08-10-2006, 11:42 PM	#1
jsudar Rock Stacker Join Date: Jan 2006 Location: Pee Gee Posts: 56	How much truck will my brushless haul? I picked up and AXI 2808/20 brushless and a kontronik Jazz 40-6-18 speed control for a fairly reasonable price. My question is: will this dinky little motor haul my nine pound Maxx crawler around? This is my first brushless setup, so I have very little experience with them. My truck still has stock maxx tires and I am currently running a 76T spur. I can't use a 9T pinion with this motor since it has a 4mm shaft and I rather drill a pinion than turn the shaft down (resale value, in case it won't work.) Is it worth my time to fab a motor plate and drill a couple pinions or will I just be disappointed and wish I had stuck with lathe motors? Don't flame me too bad. I'm new at this. Thanks for the help.

08-10-2006, 11:59 PM	#2
John Deere Rock Crawler Join Date: Aug 2005 Location: Alabama Posts: 564	It should work. All I know is try it. Let some of the other guys post before you try it though. I would be safe to beat it will work though. Only way it aint gonna work is if its for a 1/18 scale r/c.

08-11-2006, 12:17 AM	#3
jsudar Rock Stacker Join Date: Jan 2006 Location: Pee Gee Posts: 56	After reading the brushless tutorial thread again, it sounds like some of you are running some fairly heavy rigs with the HH revolver and the mamba. Since my kontronik speedo is rated at 40 amps and the mamba is 25, does that mean I will be okay if the motor is a little overworked?

08-11-2006, 05:48 AM	#4
microgoat I wanna be Dave Join Date: Feb 2005 Location: Cleveland, OH Posts: 8,009	I've got a little Park 400 in a 7-pounder, and it barely gets warm. The Mamba's not working hard, either, on 8 cells. You should have no trouble at all. Drill the pinion and let it rip.

08-11-2006, 11:59 AM	#5
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	Yep yep. Give her a shot. I would suggest getting the 84 or 87t spur, but that is just so you will have plenty of gear ratio to choose from. The mamba 25 is plenty for that motor, your Jazz will work just fine too. Keep an eye on the motor heat, dont let it get above 180c. I doubt it will get over 130f, but it never hurts to be cautious. Stay with your stock maxx tires or maxx mashers. Dont get huge tires with that motor. You will need a longer can motor to push the super tall tires.

08-11-2006, 10:46 PM	#6
jsudar Rock Stacker Join Date: Jan 2006 Location: Pee Gee Posts: 56	Thanks for the help guys. I'd rather ask some questions than burn up some expensive parts (though I didn't pay too much for them.) I think I'll try one of those Chris Fine pinions to save me trip to my buddy's machine shop so I can get back on the rocks more quickly. Thanks again.

11-28-2006, 01:16 PM	#7
jsudar Rock Stacker Join Date: Jan 2006 Location: Pee Gee Posts: 56	I'm digging up this thread again because I rebuilt my crawler and now it is bigger and heavier than before. I'm pretty sure my little AXI is not up to the job. I'd like my rpm/volt to stay about the same, but what makes a brushless motor more powerful? Is it the length of the can or the diameter?

11-28-2006, 01:39 PM	#8
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	Both length and diameter make the power of a motor. What tires are you running now?

11-28-2006, 03:00 PM	#9
microgoat I wanna be Dave Join Date: Feb 2005 Location: Cleveland, OH Posts: 8,009	I made mine bigger and heavier, too, and the motor doesn't care. I bet that Mog is ten pounds now, with six wheels, and the motor is as happy as it ever was.

11-28-2006, 07:45 PM	#11
microgoat I wanna be Dave Join Date: Feb 2005 Location: Cleveland, OH Posts: 8,009	Try low or lowest timing, and high starting power. Usually does the trick for me.

11-29-2006, 04:21 AM	#12
drksyd Rock Stacker Join Date: Oct 2006 Location: Honolulu Posts: 58	Outrunners should be run with high/hard starts but that's meant for planes. With gearboxes you want a soft start so you don't hammer the gears. I would say go with the soft start and turn up the punch control. Lesser quality batteries can cause cogging as well. Go lipo and get some long runtimes.

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