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josszo

Ikarus 280 Articulated Bus (wip)

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Earlier, I have built a Non-articulated bus with full of pneumatics. 

I have a bigger dream ever since this project, to make a bigger, more complex bus. It is not the biggest yet on my dream list, but there are new functions, that I can use in the later models.

This is an articulated Ikarus bus, with 3 axle, with full of pneumatics. More, than the solo version.

Functions (i would build them)

 

- Pneumatic suspension on all axle, with raising, lowering funcion. Both side, but seperate control.

- HOG Steering for the front "A" axle

- Forced steering on the "C" axle

- Automatic pneumatic compressor for the suspension

- Pneumatic control for 4 door

- Automatic pneumatic compressor for the doors.

- Maybe master switch for the doors, and the both side of suspension control.

- Articulated center (i need develop a working model)

- New color design (newer, better colors. Hungarian blue-white color sheme)

 

I think, the model size would be over 1 meter, or more, but I'm curious, what can I do :)

The color sheme will the same:

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The chassis is the same with the earlier model. Needed some changes on the end. 

Needed develop a new front on the part after the artuculated modul.

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The forced steering on the "C" axle was a new problem, that was very interesting to implement into Lego.

Because the suspension, I can not made a rigid pulling/pushing system in the steering. The axle can raise and lower about a width of a technic beam, so the pulling system need to be follow this movements. Combine it with steering was very difficult to me, so I dropped this idea.

I made the steering with a combination of pushing/pulling system and the traditional gear/rack system.

I planned with the minimal pieces of gears and universal joints, but there are some backlash in the steering. Because of the gear pair on the picture, there are about 6 degree difference too. Not big difference, but I compensate it with a rubber band, and can corrigate it perfectly. Need to test it under load later.

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Connecting the two parts, and the pulling steering system:

(the wheels on axle "C" can turn only +-22,5 degree, half of the first axle)

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I remember how it was terrible to stand next to the accordion in old Ikarus, but also very interesting) a cool project!

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This color pattern is a little bit tricky. White and blue parts in technic are rare colors. And I will change the doorstep from yellow to orange. I hope, the final result will be awesome :)

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I will do a thin black stripe on the side of the bus, between the white and blue section. I will use half liftarms to do this. Work with a half unit piece is fun, and challenge.

In the earlier model I used old pneumatic pumps, but now, I install the new models. These need more place (but can pump more air), so I need to redesign the front, and the rear of the bus :S

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2 hours ago, I_Igor said:

Very nice progress :thumbup: and to sound like @Aventador2004: keep building and never give up :wink:

yes, @I_Igor is correct. You should never give up. 

 

ps: you add @ then the name when trying to mention someone.

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