Mamba max getting HOT fast!

[rootar]

My dad just took a look at it, (he is an electrician) and he said the magnet may be weaker but that wouldnt have been running like it was outside, he said the windings are shot and it was junk. So i need a new motor......... the next one will be direct soldered and will use extra short scews lol

[lincpimp]

The direct soldering does help, I have had alot of problem with 4mm plugs myself. Never had a motor react the way yours did, but have had some 380 feigaos just fail out of the blue. I have also had the shafts come loose from the magnets to. The feigaos are good value, but their quality control leaves something to be desired...

[rootar]

they dont have 9L or 10Ls instock ethier. they have a 6xl that about the same KV is that too much motor? what would be the positives and negatives to running an xl? would my runtime be shorter? they have much more torque dont they so would i have cogging issues still? im new to all this shed a little more advice. i need a motor. i wanted to go to this race next weekend but i have to get this thing sorted out first and get some driving time behind it.

[lincpimp]

I would stick with the l can motors. You could run a 7xl on 3s and gear it up. The increased torque of the xl may make up for the lower kv and higher gearing. Not too sure in that situation, as I have not tried an xl in a smaller vehicle yet. You could try one of the ammo motors that tower has on sale, great price and the 36/56/2600 or the 36/50/3300 may work for your application. Can't go wrong with the price, buy both and give them a try!

http://www3.towerhobbies.com/cgi-bin...MO&S2=&S3=&S4=

[rootar]

I thought in another thread you said you tryed the ammo motors and they werent up to spec, and that you had to gear down alot or they got really hot......i dont want to down grade from a feiago, plus i dont know if the mount pattern is the same. Im gonna call mike and offshore electrics and see when is the soonest they will be getting some 9Ls instock.

im looking at the chart here and
9L= 2731 KV this puts me right at 33,000-35,000 rpms
all the ones near that are
6XL = 2779
7XL = 2382
10L = 2458
12s = 2958
13s = 2730


the XLs and S cans are the only ones instock so if they are not getting any L cans motors soon what would be my best bet, i assume the S cans would run much hotter than an L or XL because itd have to work harder in truck, so is an xl motor of the same KV like the 6XL over kill for a 5 pound truck?

Has anyone else tried an XL in a lightweight, how did it do?

[lincpimp]

When I tried the ammo motor, my gearing was too tall. I had the emaxx setup for an align 600xl 1650kv and used the same gearing for the 1800 ammo motor. Plus the emaxx is way heavier than the ls10 so it put a higher strain on the motor. I have recently heard other users with more runtime have good success with the ammo motors. I just used the wrong motor and gearing for my application. I am still learning, seems like the lower cost motors are more sensitive to gearing than the high end stuff.

[rootar]

so what do ya think try the ammo 2600 or the 6xl?

[BrianG]

Basically, you need lots of power to launch something that big and heavy. Power is generated by voltage and current. Usually, to get high power, it's better all the way around to use higher voltage. Unfortunately, the MM is limited to around 4s. At that "low" voltage, you will need quite a bit of current to launch it with also the top speed you want.

Reducing the gearing would be your best choice. No matter if you get a fast motor and gear down, or get a slower motor and gear up, the same amount of work is being done and the ESC/batteries will be working just as hard. The only advantage in a slower spinning motor at this point would be a slightly better efficiency IMO.

[rootar]

so which motor brian?

if i keep with the 13tooth and get a 7xl id have better efficiency and be geared for 35 ish and under. that long motor would have plenty of grunt on my 5000 3s to get rid of cogging and have plenty of start power right?

I thought my truck was kinda light compared to most 4x4s like maxxes and the 1/8ths.

[rootar]

would this motor work good they have two in stock and it has a heat sink built in. (looks like james already bought one and wrote a review too, lol)

https://www.unitedhobbies.com/UNITED...idProduct=2030

that is the same 9L as i had right just a different can?

[crazyjr]

I guess i got lucky, I used different screws than provided by Neu and accidentally got into the windings. its fine though

[rootar]

heck i just realized thats from that company in hongkong that take a month or two to get it shipped here.

[rchippie]

Im having a very similar problem . When i first hooked up my MM with a 3/4 charged pack & the kit tires it worked fine. Then i fully charged the pack & put 2.2 truck tires on there & now when i pull the trigger the car takes off & then it seems like the MM applys the brakes or cuts in & out . Then i let of the trigger for a second &the pull the trigger again. It will accelerate then it does the same thing over & over again. im using a 7s with 12/46 gear & 2s lipo with the lvc set at 6.4. any ideas ?.

[rootar]

Mike came through and saved the day he had one 9L motor left and i ordered it today along with some battery straps so i can ditch the zip-ties.