16 replies to this topic

[Carsten Svendsen]

I want to build a rollercoaster car and I've got the wheels done. Now all that is left is the body and for that purpose, bricks seems like a suited choice.
But... I don't have any experience in that at all and I've basically only got technic bricks with holes. That's why I ask of someone who is willing to spend a little time building a car matching the picture below.



This is what I was thinking about, you're not allowed to change any of the links or wheels, but the 9L liftarms.
The colored parts beneath are the rail it needs to roll on



Thank you for your time

Edited by Carsten Svendsen, 22 September 2012 - 07:56 PM.

[Carsten Svendsen]

I forgot to mention that there should be enough room for the chain lift mechanism like the one I've build below.
This is not final, just a quick moc-up



EDIT: I don't think it would work with the engine crankshafts either; When the train comes up the hill and over it, the front car will still be on the chain while the other cars are pulling it downwards. This means that I could just exchange the crankshafts with an axle #2 old style (3704)

EDIT2: I don't care if you haven't got the pieces in red, I'll order the correct pieces at bricklink when/if you'll come up with something.

Edited by Carsten Svendsen, 22 September 2012 - 04:09 PM.

[SNIPE]

Hi,

Do you have a .LXF file for your current model?

[Carsten Svendsen]

No I don't have an LXF file but an SR 3D file. You don't really need one either; all you need is 2x 9L liftarms with a distance of 10-12 studs (whatever looks most realistsic).
As already mentioned, all my brick-building capabilities consist of extremely simple techniques and not the advanced stuff I see on houses/trains/trucks etc.

[legolijntje]

Can you share your l3b file? Both the track part and the chain part?
I think I can make something nice, but I can't promise  

[Carsten Svendsen]

Sure, here you go.

You're not allowed to change the way the links are connecting the cars. All other parts you may change if needed but it obviously still requires a chain lift mechanism - Perhaps it can be made more compact if needed be.

I'm not certain on the length of the car, but as long as it looks realistic enough it's fine.

[legolijntje]

Do you now your current contstruction won't work, because one of your T beams is in a gear-rack?
And the lower parts of the "wheels" aren't attached at all?

[Carsten Svendsen]

I am going to use 3mm rigid hose to connect the wheel through the 1/4 pins and the pins rotate really well

I didn't notice the T-beams where inside the gear rack
I made a few changes to the model. You're permitted to come up with solutions yourself though

Attached Files

•  car.zip   1.25K   18 downloads

[Alasdair Ryan]

As Legolijntje said there is a problem whith the way you desgned how the car is driven on the rail.
How ever this may work as a solution to the problem.....

[Carsten Svendsen]

Alasdair Ryan, on 23 September 2012 - 04:01 PM, said:

As Legolijntje said there is a problem whith the way you desgned how the car is driven on the rail.
How ever this may work as a solution to the problem.....

The problem is that I need a wheel that fits the largest arounda pin joiner and it seems that only a combination of train wheels are best suited as they fit halfway around the joiner.
The T-beam has been outruled as a way to attach the wheel as they overlap the gear rack that prevents the car from falling down the hill if the chain lift fails.

[Alasdair Ryan]

You can swap the wheel I used and replace it with your own choice.The problem was that the bottom of the car was going through the gear rack.

[legolijntje]

Alasdair Ryan, on 23 September 2012 - 04:01 PM, said:

As Legolijntje said there is a problem whith the way you desgned how the car is driven on the rail.
How ever this may work as a solution to the problem.....

You can leave the bottom 3L beam, to make it look better

[Carsten Svendsen]

legolijntje, on 23 September 2012 - 05:05 PM, said:

You can leave the bottom 3L beam, to make it look better

Then, the only parts that would keep the wheels on the car would be 2x 1½ pins. The car itself doesn't need to be sturdy, but the wheelbase does.

[legolijntje]

Carsten Svendsen, on 23 September 2012 - 05:19 PM, said:

Then, the only parts that would keep the wheels on the car would be 2x 1½ pins. The car itself doesn't need to be sturdy, but the wheelbase does.

No, no, Alasdair Ryan's wheelbase uses 2 axles to keep them together, so in theory, the bottom 3L beam is useless, it doesn't ad anything to the sturdynes  

[Carsten Svendsen]

Do you have any progress to show me?

[Carsten Svendsen]

I just realized that the size of the track will become extreme so therefore I'm reducing the width of the track from 5L to 7L, meaning that the car will be reduced by 2L.
By doing this, I reduced the lenght of the track by 3 metres!

[Carsten Svendsen]

I have now made some adjustments to the car.



Based from the drawings of the RC car, the rail width is 5L and the car length from link to link is 10L.
This is not final at all. I still want the links to be able to move 3 ways and the wheels should be left untouched. In addition, there needs to be a complete chain lift mechanism including safety devie for falling down. Besides from that, I don't care what is changed on the cars them self.

I hope I still have legolijntje to help me on my way, he haven't responded to my pm's today but I guess I was going too fast. The car has been reduced from 8L to 6L in width and that's a lot of work that needs to be changed or revised. If anyone else wanna try to build a suitable Rollercoaster car, let me know and I will send you the needed information.

I suppose that the results could be posted in this thread and then we (not I) will pick the best looking and most solid car, or perhaps mix some of the variations together.

Attached Files

•  car.zip   1.35K   18 downloads

Edited by Carsten Svendsen, 01 October 2012 - 09:53 PM.