Brushless J-truggy - RC-Monster Forums

Jasper · 06:14 PM

Hello people,

I need some advice about the wanderer XL motors. I am designing a chassis in autocad, with as base point two f/r diff from an 1/8 buggy and a center diff (46 tooth plastic spur) and the savage servo steering setup. I also use the savage front and rear suspension. So I can use my 23mm wabash wheels with 40 serie bowties. For the shocks I use the UE racerx. The truck will be 482mm long and 190mm wide. In the chassis I made 10 holes at each side for the cells. The chassis will be 4mm thick, the upperdeck 3mm and the left motormount en the right mount 8mm.

I want to use 18/20 cells. The xushobby ubec will replace my heavy receiverpack. I still use the 9920. I have a 12,14,15,16,18 and 20 tooth mod1, 5mm bore pinion laying around.

For my savage I have a 7XL. But that is too hot for my setup and the centerdiff with only 46 tooth. I used the calculator to get to know what motor is the best. And the wanderer 13XL came out to be the best choice.

Do you agree with that?

If anyone has other comments, please share!

02.27.2006, 06:13 PM

Sounds like a sweet project. Can you get some pictures of the CAD'd chassis?

maxxdude1234 · 02.27.2006, 06:17 PM

The 13XL is a very slow turning motor, and even on 20cells its not really going to come to life. I would say something around a 11/12XL might be better suited, and they'll have so much torque that it won't really matter that you've only got a 46t spur.

Serum · 02.27.2006, 07:39 PM

the 13XL will work perfect, like we discussed yesterday evening Jasper. It was the mixture of power and runtime you are looking for. you could go for a 12XL for a bit less runtime and more power.

the 11XL is too hot, with that 46 spur. it's geared for 40 mph with a 12T allready.

Your goal was to reach 45-50 mph, that and the desired runtime, i still advise you to take the 12 or 13 XL.

02.27.2006, 08:18 PM

sounds like a good project and the 12/13xl sounds like a good choice motor wise

Jasper · 05:12 PM

Thank you guys! I will order the 13XL as fast as possible.

Here is the prototype for the J-truggy. I need to adjust the upperdeck because there are no holes for the savage steering setup. I need to adjust the rear of the upperdeck because otherwise the motor can't reach the spur gear. And I need to make one extra hole at each side for the cells.

http://img454.imageshack.us/my.php?i...nternet8zr.jpg

maxxdude1234 · 02.28.2006, 05:15 PM

Nice work the Jasper. What are you planning to make the chassis out of? CF/Aluminium?

Dafni · 02.28.2006, 05:19 PM

Nice project, Jasper! Can't wait to see a finished product!

Somehow this project, with its buggy driveline and Savy suspension, seems to remind me of another project I heard of.... I guess the nationality is a coincidence ;)

Bring it on boys!

Jasper · 02.28.2006, 05:20 PM

I will use aluminium for all the parts. A friend of mine is making all the parts for me at his school. Because he is studying metal adjusting. I asked him if he could get a hand on the 7075 alu, and he said, it is possible :)

Serum · 02.28.2006, 05:34 PM

LOL Daniel..

My project will follow.. (might take a year or 2-3 ........ )

02.28.2006, 06:04 PM

it looks good jasper
nice work

coolhandcountry · 02.28.2006, 10:15 PM

Well if I was going to buy a motor. I would put a 11xl on it with 20 cells at 13 46 gear with the bowtie tires. But that is just me. My calculations come out to about 47 mph.

Jasper · 03.01.2006, 03:52 PM

Yes coolhand, that's right

Here is a list of motor/speed. All these speeds are with 12/46, 20 cells, 135mm diameter tire and 3,31 ratio.

11XL: 45,6 MPH
12XL: 41,8 MPH
13XL: 38,25 MPH

The 11XL seems to me offcourse the nicest choice. Because I like speed :) But only if the runtimes and temps are good. I want to run 15-20 minutes on IB3800 cells.

The weight is probably around 4 - 4.5 kg. Because my 1/8 buggy also weight that.

So does anyone know what the runtime/heating up temps are with these motors?

coolhandcountry · 03.01.2006, 05:17 PM

20 cells with 9xl I got 34 min ib 3800s. Temp got a little warm but not bad. Should have less of a problem with the 11xl. With even more run time.

Jasper · 03.02.2006, 02:18 PM

Thanks coolhand.

Mike said to me in a email that the 13XL is taking a long time until it gets here. The 12Xl could he fix in one week and the 11XL is the fastest shipment option.

With all these information I think I go with the 12XL. I will order this motor with lots of other parts. Man, this hobby is soo expensive! But I love it :) !