42009 Fully RC using 2 receivers

[arshiaIQ]

Hello everybody, after a week of developement, and a few weeks of thinking and seeking into different websites and instructions, I have finally "fully motorized" the legendary 42009, using only 4 motors and 2 receivers (as I don't have more and can't find them here...)

The first MOC which I'm posting here ;D hope you enjoy reading this

How does it work?

we have 2 gearboxes here, it has to! the first gearbox (I will call it GB1) has 4 different outputs and is located in the superstructure, the superstructure internals are nearly identical to 42009's original, except for LAs' placement and shifting mechanism which is a bit like how 42056 switches its driving rings, so it has an L-motor in the same place as original, three outputs are the same as original which actuate boom lift and boom extension and winch, but the forth one which goes through turnable, although it still goes inside turnable, drives the "switching" mechanism of GB2 (the gearbox in the chassis) which has also 4 outputs (2 driving rings) instead of actuating original stabilizers gearbox... so when we use the M-motor to change gears of GB1, if we switch on the 4th output which shifts GB2 and power the L-motor on superstructure, the GB2 will switch its functions

there is a receiver on the superstructure which controls an L-motor (GB1 Input) and an M-motor (switches GB1)

the chassis has its own single L-motor, which is the input for the GB2, GB2 has four output, one for drive (with struggle...), one for superstructure rotation, one for stabilizers' horizontal extension and one for vertical extension... its all the basic principle behind it!

Overall looks

Obviously, the cab has been highly inspired by the Groove 6400! the rest is the original 42009 which has another axle after the driven axle, unfortunately the wasent enough space to make it steered or driven!

The red notch on the right side indicates current position of GB2 and such thing is also found on the superstructure which indicated position of GB1

due to high length, i had to modify fenders and some other structures to be able to steer wheels at a higher angle without disturbance, to accommodate high steering radius

Steering and Drive

The cab is full and houses an M-motor which does the steering through several sets of gears and a worm gear

I first tried the servo for steering but it had struggles doing it and even worse for returning, so I decided to sacrifice return-to-center

and replaced it with an M-motor...

driving is done through the GB2 so it is done by an L-motor, unfortunately, due to gearbox limitations, driving is not available while using other functions of GB2 obviously!

Driving output of gearbox reached the differential through several reductions.

Boom!

at first, this crane used to utilize a boom much similar to Groove's boom, but due to lack of parts (lack of curved 3x11 panels) I made it using regular beams, so it became soooo heavy, I managed to increase torque of LA's inputs by a set of gears, added a third LA and made it more rigid. but the main problem was the connection point of the boom and the superstructure, the 12L axle connecting them was breaking from load... so I dismantled the boom and installed original 42009 boom which does not fit to this crane at all

triple LA's (I had not seen any crane with three LA's before... as long as my goldfish brain remembers):

Some pictures...

functions on display

The cab's close-up

BB2 placement (note that V8 engine is still under it!)

Close-up of gearsets before differential

this is one of the GB2's changeover bars, its on the right side, due to lack of a second 9L towbar, I made this to overcome the problem, the "3L pins with hole at middle" are made frictionless with a drill, so they can rotate like a frictionless pin, I also once made a heavy duty U-joint using them which could overcome high torque and speed without any problems! :D I will post it later

using this method gave me the option to install an indicator which was not possible using normal 9L towbars

The towbar

GB1 switching mechanism, unfortunately I couldnt find any delicate control switching mechanism (like Sheepo's mustang, if I had access to paypal I would just buy the instructions to find out the mechanism used there)... so you should be careful while switching and keep an eye one the red notch, when its at a perpendicular angle, you can go on!

It uses my very first PF component which was an M-motor from Nathanael's 8292 (the cherry picker... I still love it, I had only that motor for years)

A close-up of underhood, not that the tan 20t bevel gear and 16t gear can be slided by hand to have different speeds and torques from the motor. A very simple gearbox :D

an aerial view, note those large shock absorbers which have been posted by dear member Nick Barett from Englad for me, here! Thank you again Nick (hope you read this)

A final pic! :D

thank you guys for reading this, this was my first moc here, i tried to include stories and notes throughout the post to make it a bit more excited and not boring. sorry for any grammatical mistakes and bad lightning of photos (my stupidphone not smartphone cause it cant do a bit of lightning XD)

it wasent a straightforward build and I had to make it using my limited parts count... I loved this challenge I hope someday paypal would be available here so I will be able to use bricklink to order some really necessary parts at least, I am the only persian here and Im proud of myself for being unique here :D

I doubt if anybody else in iran knows what eurobricks is

thank for reading

Arshia

[Alasdair Ryan]

While I do like the fact that you have motorised a existing set,I do think you might of been better just starting from scratch.

Given that you are: new , your limited parts and your location you did not to bad for your first attempt.

[KamalMYafi]

WOW, That thing is HUGE! I really like the front!

Any chance for video?

Edited August 13, 2016 by KamalMYafi

[arshiaIQ]

  On 8/13/2016 at 8:51 AM, Alasdair Ryan said:

While I do like the fact that you have motorised a existing set,I do think you might of been better just starting from scratch.

Given that you are: new , your limited parts and your location you did not to bad for your first attempt.

Yea but I'm not a good scratch-starter.

I have many sets and I've been into technic since the age of 6 :D

Limited parts are due to location, cause paypal doesnt support here... just this

I'm so excited to dismantle it and make the Xerion and mod it so heavily

Edited August 13, 2016 by arshiaIQ

[arshiaIQ]

  On 8/13/2016 at 8:53 AM, KamalMYafi said:

WOW, That thing is HUGE! I really like the front!

Any chance for video?

Yes of course, Ill make one ASAP

[syclone]

Fantastic modification, love the triple LA setup a lot.