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.
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
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!
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...
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!
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.
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.
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?
45 two 3 long axle connectors with hole
49 two grey pins
big PF motor
55 small PFmotor
66 IR receiver
So that is really not too much!
Hoping this helps, good luck anyhow and happy building...
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...
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.