Updated: Almost Lead Sled

The Lead Sled project has made progress but I am not entirely happy with the results so far. The packets ordered on Bricklink have arrived one by one each day. The final order was UK, France, the Netherlands and New Zealand - I have ordered them all with a few minutes difference.

The first obvious problem is that some parts arrived in the wrong color. Unfortunately both of them are at visible places, one is the hinge of the doors and the other is part of the rear seat. One of the merchants was very kind to send the piece in the right color in a follow-up mail.

There are other problems too. The most obvious one is that the very front of the car gets detached from the rest very very easily as it is held in place by two studs only. I did not realize this when I designed it in LDD - it will need a redesign and it is far from trivial. The rest of the front is not very strong either but I have managed to get it up to an almost acceptable level by adding more stiffeners.

One more issue is that when opening the hood there is an obvious tension between the hood and the chassis. As I could judge from the photos this is exactly the same on the original model built by Mad Physicist, so I am not sure if that one is any better.

The studs at the upside down pieces near the front wheels make contact with the wheels. This can be only realized once I start pushing the model. I have also not figured out how to attach the chrome parts to the wheel either.

All in all it does not feel as a total success yet, but on the photos it looks good.

Updated: seeing my enthusiasm Mad Physicist has provided me more details about the internal structure of his car here and here. Looking at the photos I quickly started to wonder why I was not able to figure it out by myself :) Anyway the tips should be enough to make the front a bit more rigid, have a proper cover on the wheels and avoid the contact between the front wheels and the body.

Analyzing a masterpiece

Now that I have built the Lead Sled myself I discovered many tricks. This post is about some of them.

The original car is riding very low, the oversized body is as close to the road as possible. To achieve this all the wheels should sit as deeply embedded in the body as possible. This is not simple with Lego bricks. For the front wheels Mad Physicist has used a panel with an L cross-section – built in upside down. There is no hanging version of the piece, only a standing one. The image below shows that this piece with all the other pieces upside down fit perfectly into the contour of the bodywork.

The width of the car is 11 studs without mirrors but it gets narrower towards the rear of the car. The even-width parts (rear bodywork) fit seamlessly with the odd-width parts (front, roof).

One example how to mix even-width with odd-width is the trunk: the cover is 8 studs wide but its holder has an odd width. The closeup below shows the three small plates with a clip that connect to an even-width plate with a handle.

One more detail that I have only recognized while building: the upper row of slope bricks in the rear windshield are half a plate higher than all the other plates in the car. Having these slope bricks  halfway between other plates results in a smooth roof line. The small step at the bottom of the curved bricks above disappears as well as the other small step in the sloped bricks.

Yet another tricky part is the windshield. It looks good but I kept thinking about what keeps it in place. Finally the creator himself let me know that at the bottom of the transparent bricks there is a plate with a clip, attached to a tap that is completely hidden inside the bodywork.

The car is made of approximately 700 bricks. This is a lot for its size. For comparison the similarly sized Lego 5867 car has only 278 pieces! The Lead Sled contains only a few classic Lego bricks, most of the pieces are plates or special parts.

Because I travel a lot during Christmas I did not order the parts yet but it will not be long before I do so. Until then, Merry Christmas to everyone!

Lead Sled reverse engineer

I am a big fan of miniscale cars like the ones built by Mad Physicist or the Arvo brothers. The challenge is entirely different compared to building large cars: instead of simply putting bricks on top of each other they require a lot of attention to the details to put everything in place. A special piece or a tricky solution has great impact to the model but it may need a lot of experimentation.

I considered building a replica for myself several times, for example one of the cars made by the Mad Physicist or the Porsche from the Arvos. Our friend the reverse engineer who helps to build the whole thing by looking at the end result only. From Lego bricks, of course.

So far I never got past a couple of thought experiments because apart from obvious details I had no clue how to continue building. But now I have decided to go on with the matter. Mad Physicist has built his '51 Mercury Lead Sled. On one hand looks very desirable, on the other hand it has several detailed photos so that I can have some hope. On top of this Ralph is very helpful and did not object and even gave some clues when I had questions about the details.

I started with Lego Digital Designer. Some bricks are unavailable and even more so some colors, but at least I have infinite supplies. Compared to other virtual building tools it is an important advantage that it models the physics of the bricks and does not let me build stupid things. This is how far I got (click on the album):

The colors are not quite right and some other details like the wheels are different too. But it looks promising. I am truly uncertain about some invisible areas but the external feels right.

When I am done with all details the next step will be Bricklink in the New Year.

'51 Mercury Lead Sled

This time out favorite Mad Physicist created a classic hot-rod from bricks. I think it looks great.

Vokswagen Beetle hot-rod

Mad Physicist took his VW Beetle this time to rebuild it as a hot-rod, quite popular in the US. The bodywork is mostly the same but the mudguards are gone, the suspension is lower, the front wheels have moved ahead and the roof is lower too - just like with a real one.