Help with a Lehner Brushless Supermaxx
 

Hey there pplz, I had quit my R/C passion for a year because of all my univeristy work and applications that i would have to do in the near future. But now im done with all of it and need your help.

I have a supermaxx'd brushless system and completely forgot about my setup and how to work it.

If i remeber correctly i had a Lehner 18120(maybe 150 ill check) controller and Lehner 1570 engine... running with 12 3300's in series, and 16 3300(untested). Now the Y adapter i made before was actually in parrallel and this made my car slower in 2nd gear which was really strange, so now hopefully im going to get a correct y adapter done for me.

1st question: the receiver pack in the pics(i need a host) is a 4.8 volts 250maH nicad battery. I remeber being told not to use over 5 volts for a reciver pack so i bought this one. Will it work?

2nd: my spur gear pinion are 17/72. Is this fine? Keep in mind i have the supermaxx differentials which change the gearing.

3rd: is there anything i should change if i want to use 16 cells instead of 12? i never had time to test the car with 16 cells beacuse of my y-adapter problem.

Please help me, not many people know about brushless in london!

Hi Swift, and welcome to the RCM forum.

Not many people know about BL in London?? Well, you just found the best place for any BL / Maxx related info.

As for this Y wire thingy... I don't see the problem. Don't you just solder your stuff yourself? Get a couple of plugs, some wire, and go for it.

I always use 6V on my receivers (the 6V come from an UBEC, some kind of voltage regulator)

A Lehenr 1970, eh? Do you know the number of winds, or the rpm/V rating?

im checking now, its meant to be very powerful i remeber i wanted the best there was back then lol, and about the pics maybe you could tell me if my setup is ok i just really need a host.

Oops my bad its not a 1970 its a 1930 hmmm, and its written 4D 12 S i think(this is a guess the writing is all scribled out)

Could you give me a link to your receiver pack?

Thanks for your Help.

Sure, here it is:
http://www.rc-monster.com/proddetail...=6vubec&cat=39
Highly recomended by most of the users here.

As for your Lehner 1930, if it's a 12 turn, it would have 1743rpm/V. Gear it for 35-40mph and you should be fine.

You're welcome.

ah i just found out i had a stealthy mounted receiver pack on it already. It seems to be a black 5 cell ballistic 1100mah 5 volts pack. I think that'll do. And 17/72 is correct gearing with supermaxx diffs?

Hello Swift nice to see you found RCM ;)

Good luck with your maxx.

got some pics!

http://photobucket.com/albums/d158/P...ent=Thecar.jpg

More then likely i would guess you are running a 8d 12 s lehner 1930. I have a 6d 10s 1930. It works well for my maxx. Check the back of the motor to see what you are running the motor in s or d mode. I run mine in s mode and has no problems.

ill give it a look...can any1 answer my gearing question? And if i have to change the setup for when i use 8*2=16 cells?

It really depends on how the motor is setup.If the motor is set for a 8 turn then you need to gear lower. If you have a 12 turn setup then you have to gear higher.

swift did you buy the rumrunner bulk buy? if so your running the 1930/5. do not go over the 5.5 volt rx pack on your older bk controllers

Get that mess out of the controller wire's. That might give a problem.

Yes i think it was the bulk buy. How can i check exactly what motor i have? maybe call rumrunner and make them find out what i had ordered?

My lehenr has a number on the end of it stamped in the metal. I not sure if your will or not.

aha yes i just noticed a 7 back there, got more pics.... so taht means i have a 1930/7 12D 4S....?

your motor is done up in s fashion. So like the motor is it is 12 t motor.

so what does that mean exactly? In term of gearing, cells ect??

I would not be scared to run 14 cells on it and gearing 16 66. I ran a 12 51 strobe with 1/8 buggy diffs with no heat problems. Are you going to run strobe slipper with mod 1 gears or 32 pitch.

the slipper is the one with the blue aluminium slipper pads... robinson if i remeber right.... correct?

OK well listen this is what im gonna go.

Run my 1930/7 with 17/72 gearing and 18120 controller with 12 gp3300 in series with a y adapter in series and a separate 5 volt 5 cell 1100 nimh pack for my servos.

Should i run the slipper really tight or loose?

If that works, i just hop in the 16 GP 3300's no problems?

with the set up on back of the motor you are accually running a 1930 12 turn. the gearing seems to be right. It should take the 16 cells as well. I would keep and eye on the temps. As far as slipper I would run it tight.

ok thanks again for ur help mr.laptop penguin :p damn its late here 2 am :/ Anyway will hopefully manage to get it running this weekend. Stupid chargers in england mean i have to charge my GP's at 3 amps. :W:

Have you got to test run it yet. I am curious on how it turned out.

no m8 i havent got the time(thought i did), im almost 100% sure i can do it after wednesday; i have college stuff still on my back.

OK coolhand i finally got the y-adapter done now. IM sorry im so late but its just i have less time than expected. Im gonna run it today or tomorow. I have some pics of the wiring ect. and i want to make sure its all correct.

Here it is.

http://i35.photobucket.com/albums/d1...te_/Emaxx1.jpg

Looks good, Swift! Plug it in and let me know!

Wait a sec... So now i cant use the RX pack if its 6v?

Im very happy to announce that it works fine on 12 cells. I got a couple of wheelies out of it, which is pretty good considering the weight and soft suspension. It will certainly be better on 18. I love the car :) Vry fast acceleration in 1st lol. Could only use 2nd for like 1 or 2 seconds outside my house. London is busy city still at 1 am lol.

Thanks all very much for your help, now i need to get a charger for 18 cells...