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RCOffroader - Remotely Controlled Offroader
The official LEGO Off-roader, but then remotely controlled.
About this creation
Mind you that the picture shows the official model, so not the modified one.
Please follow the YouTube link to see the model in action!
YouTube
Please follow the Instructions link to see a slide show of how to modify it.
Instructions
The modded Off-roader has two additional power function motors for remotely driving and steering it. All the functions of the official LEGO Off-roader model are kept. It is actually a dirty hack, because i needed a few rings to prevent slip of the gear onto the differential. This is best shown in the youtube clip with the annotations. Another drawback is that the steering is a small (=fast) motor directly driving the pinion, so it is impossible to steer straight!
Nevertheless it is nice to drive around with it.

Happy driving!

NXTLiftBoy



Comments

 I made it 
  March 30, 2011
Hello Shreyas Udgaonkar, thx for your comment. I adapted album names but forgot to update this link. It should work again, i fixed the link, happy building!
 I like it 
  March 28, 2011
Hi, The instructions are not available at the link you have provided. Can you please re-upload?
 I like it 
  June 23, 2010
Hi its a good application thanks for your sharing instrc. with us
 I made it 
  April 2, 2010
Pine L, thx for your comment. i really can not remember how long it took me to adapt it, perhaps down to one hour or so?
 I like it 
  March 28, 2010
well i was looking at alternative ways to power it and i am going to toy around with mine and see which one i like best. i might attach it inside the cab on the axle driving the V8 engine and put the steering motor on the knob
 I like it 
  March 28, 2010
WOW -! (OoO)/ that`s really smart ! Thanks for sharing,that really do me a favor ! By the way , how long did it take fo you to come up with this idea ?
 I made it 
  March 27, 2010
No, the washers are not really necessary. If you do not put them in the gears still mesh, but they will skip a couple times if going full speed ahead from stand-still. I expect that if you use the speed remote control and use all the 7 in-between speed settings, the gears do not skip at all. Of course this is for a flat clean surface, in your garden the gears will grind away i guess. Happy driving!
 I made it 
  March 27, 2010
Antoine Beauchemin: i answered this one on 1 december 2008, see below.
 I like it 
  March 27, 2010
are the washers really necessary? if i do not put them in will the gears not mesh properly or just skip a couple times in a rotation?
  December 4, 2009
If I have a OffRoader What I need for build a Offroader Remotely Controlled Technic Power Functions?
 I like it 
  July 22, 2009
thnx mate!
 I made it 
  July 18, 2009
Hi Sean! Sorry for the delay, been busy lately with other matters... As to your question, let's see if i can reproduce. Judging from the instructions and the hassle of inserting the washers, i think i inserted 2 washers on the right back half-axle, so not on both sides. Another washer went on the driving axis to the motor. Please study the YouTube vid too for this one. The thickness i really cannot tell, probably around a millimeter, but maybe 6 to 8 tenths of a millimeter. You'll have to try! BTW I came later to the assumption that the LEGO company designed the differential large gear this thin and hence flexible ON PURPOSE. It is better to slip gears and have one being flexible to reduce forces and wear when slipping, than to have rigid gears that slip and wear forcefully...
  July 16, 2009
please respond
  July 7, 2009
Do you put washers on both sides? How many washers on each side?
 I made it 
  March 17, 2009
radek: thanks for sharing your solution, good work! That must improve steering indeed.
 I made it 
  March 17, 2009
Siem, did you follow instructions? What *does* happen when you switch on the motor? Are your batteries strong enough? Hopefully this gives you a clue...
 I like it 
  March 15, 2009
Sorry i ask for help this late but, I NEED HELP!!! I just can`t make it move on its own not even with a XL motor, the wheels are much too heavy, plz help me.
 I like it 
  January 27, 2009
Hi, sorry for getting back to you after a while. You've probably figured it out yourself, but I made some photos of my solution so I can finally share them. I'm Radek1 on Brickshelf, my folder is http://www.brickshelf.com/cgi-bin/gallery.cgi?f=364207.
 I made it 
  December 7, 2008
Radek: Thanks for your generous comments! seems to me that your solution for steering is better indeed, do you have pictures or videos to share? That is alway easier than encoding/decoding in 'pro' talk :) Also, did you include a white slip gear for protecting the motor and batteries when the steer is at its extremes? Thanks again and keep up the good work!
 I made it 
  December 7, 2008
Jonathan: washers are important else the teeth of your differential will wear out in no-time! You will really spoil your LEGO parts that way. This is because under the large forces of the motor the parts bend just a little bit, so you need to get rid of all leeway, making the teeth of the gears really fully grip one another.
 I made it 
  December 5, 2008
Adrian: there is only one length axle possible, and that is the one that fits. Judging from the photos it is a bit hard i admit. Counting based on the stopper ring, i come to 7L. So length 7 it should be, good luck! BTW instead of the washers, someone suggested to me to keep it all 100% LEGO, and cut off the desired length (a single millimeter or so?) from LEGO ribbed flexible tubing that can be shifted over an axle.
 I made it 
  December 1, 2008
Adrian: From perusing the instructions: Photo Extra Parts 27+28 2 axles 5L 31 beam 9L 2 long pins H pin (="Hassenplug" pin?) 34 2 stop rings 34 2 stop rings 39 axle 9L? stop ring axle extender gear 20t 45 two 3 long axle connectors with hole 49 two grey pins axle 2L big PF motor 55 small PFmotor two pins 66 IR receiver So that is really not too much! Hoping this helps, good luck anyhow and happy building... NXTLiftBoy This @#$%!#$% editor of MOCpages ruins my nicely formatted table. Copy pasting into Word with formatting, saving as html and pastin html does not work either, just like viewing source in the browser and copy pasting that, must be just me. So there you have it, this is the list i can provide given the limits of mocpages or my ignorance to investigate...
 I made it 
  November 29, 2008
Adrian from Ireland, apart from the offroader itself, you can consider buying the dinosaur set, as it has both motors and the remote, but if you can afford it the bulldozer is maybe better. I saw the bulldozer for 114 euro (!) at amazon.de. In my opinion buying spare parts gives you much less bang for your bucks. Good luck!
 I made it 
  November 25, 2008
Jonathan: Washers are the rings you use with bolts and nuts, so any tool shop with metal work will do.
 I made it 
  October 21, 2008
Apple pie: thanks! Siem: let me know if you have any difficulties, i may be able to help out, good luck! NXTLiftBoy
 I like it 
  October 17, 2008
Very good! I`m going to try it too.
 I like it 
  September 7, 2008
unbelievable!
 
By NXT Liftboy
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LEGO models my own creation MOCpages toys shop RCOffroader - Remotely Controlled OffroaderTechnic


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