3T Sports Sedan


The sport sedan is my favorite kind of car. You can have your McLaren, if I can have four doors and a long hood. One with the proportions of a C-class, the suspension of the ATS, the engine of a Mazda 6, the suede interior of the M3, and the value of the G70. Don’t worry about me, I’ll be set. But there are few good sedans in LEGO, and even fewer smaller ones. Let’s change that.

Instructions may be downloaded here.

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When I set out to make a sedan, I wanted it to be smaller. What were the features I could add in a smaller LEGO car? It had to have some style, suspension, a gutsy engine, steering, and a transmission. Finally, it had to be strong. So I got to work. The scale was set on a 3 Series that was a little wide, so I set the hardpoints and set off to work.

I first set the two axles and suspension. I have built a couple cars with a floating rear differential, and this setup has worked well in the past, so it would work well for this car. Each side had a dual arm independent setup with two shock absorbers. The front suspension used a dual A-arm setup and a wheel hub with only one hard shock absorber.  Before adding the steering, the driveline would need to be finalized.

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I played around with a number of transmissions, but settled on a simple two speed design for a number of reasons. First, it was smallest as something else would take a lot of space from the interior. Second, something better would take away from the rigidity of the model. Sedans need a lot of support through the transmission tunnel as you lose a lot of rigidity near the doors. Finally, anything more complicated than 2 speeds would be tricky to manually operate (play with) in this scale. About half way through my work on this project, some fun new gears came out which improved the design.

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Next, I moved on to the bodywork. This is the part that causes me the most problems in my car builds, and this car was no exception. I set the doors first as I wanted to use two panels for each side. Then I worked on the front and rear bumpers. The rear came together quickly, but the front took a little more time. I wanted something that was sporty, and with a simple grill. I think it worked out well. Finally was the roof and the rear quarter panels. This part took a long time, as I wanted something strong and stylish. The result is strong and has the C pillar split into a D pillar. It is not perfect, but it is stronger than all the panel ideas I tried.

After the bodywork was set I did something I have never done before, I rebuilt a second whole car. This time, I knew all the final features, and where all the body work would attach so I could focus on creating a strong frame that would best support the whole design. I am happy I did this, as it cleaned up the inside, found some new solutions, and made the whole car stronger. Building this way also helped me think through how clear instructions could be made.

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In the end, I was pleased with the final design. It accomplished all the goals I wanted, and it is an accessible design for others to recreate. I love building in this scale, and cars are a lot of fun, so I will need to do another small car design again.

Until the next time, happy building.

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Porsche 714


My Entry for the LEGO Rebrick Porsche Contest.

This year, it seems like everything about LEGO Technic is about Porsche. LEGO created a 911, and started a contest for creating your own Porsche. Porsche is all everyone is building and talking about.

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So I made one too. The Rebrick team posted a contest to design your dream Porsche, and thinking of the words of Mr. Porsche, “I couldn’t find the car I dreamt of, so I decided to build one myself,” I set to work. My dream Porsche lives in the spirit of the 914 and the 924: A compact, lightweight, mass-market, rear-wheel-drive sports car. It has a long hood, short overhangs, and a roofline that alludes to Porsches of today and yesterday.

714 Rear

I had six weeks to design a car. In a week I had the front and rear axle, and the transmission. The transmission is a similar unit to the one I had in the ATS. Six speed manual, with a single point shift lever. It keeps the gear changes quick with short throws. The rear axle is an independent suspension design, with short upper swingarms, and long lower swingarms. This changes the camber of the wheels as they move through the suspension travel, to keep a consistent contact patch around a corner. The limited slip differential is mounted longitudinally behind the axle. The front suspension is also independent with short upper and long lower swingers. The are mounted to a steering uckle that gives both Ackerman and caster geometry.

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Because it was my dream car, I wanted a car that would be inexpensive, and teach me how to drive fast. A front engine, rear wheel drive is a less expensive car to design and build. Additionally, my car would have a Boxer 4 for lower cost, and an option for Boxer 6 for more performance. Since I can use some training to be a better fast driver, I though a roll cage would be necessary.

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The remaining five weeks were spent working on the bodywork and the interior, which always takes more time than you think. I fit the cabin in around all the mechanical bits, and was able to add a glovebox and a manually adjustable tilt steering wheel. The seats are simple, but match the car interior well. I wanted to keep a couple of features that were iconic in my mind with Porsche cars: Round headlights, a full width thin taillight, a curvaceous roof, hunches over the rear wheels, and a taller greenhouse. After many drafts, I was able to get a design I was pleased with.

The car turned out how I wanted, and I felt it was a good contribution to the contest. The front of the car did not turn out how I envisioned it in my mind. The rear did not look as clean as I wanted. Mechanically the car works great. The suspension works perfectly, and the steering works flawlessly without hitting the wheel fenders. The transmission is great, and the limited slip differential continues to do the trick.

After all this talk about Porsches, I’ll take some off and build something different.

Happy Building.

Porsche 911 Cup Car


In a moment of online immaturity, I requested a topic for the 100th LUGNuts Challenge. I was tasked to build “any year Porsche 911, or a 2015 Jaguar F-Type.” It was to be completed during February 2016. I, of course, mistook the challenge as a requirement, and worked frantically to complete the MOC in 13 days.

The full gallery may be found on Flickr or Brickshelf.

Porsche 911 (964)

Being the year of the Technic Porsche, I figured it was a good idea to try my hand at the 911. The 911 is an iconic car and it’s shaping is instantly identifiable. It seemed like a bad idea to try and recreate it. I spent the first week of the month planning the style, scale, and the features. I decided to model 935, 964, or 991 GT3. Each were rear wheel drive, and had a wide rear track with prominent rear fenders. I decided on a four speed transmission, steering, and full suspension all around. Throughout the build, I settled on a cup racing version of Model 964, in OCTAN colors of course.

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I started building on Feb. 10th, and completed the placement of all the major components. By Feb. 15 I had a final chassis. I used a “dynalive” suspension on the rear connecting to a short/long arm suspension design. The differential is not fixed to the chassis, but move in a dynamic way between each side of the suspension. I have used this set up before, and it works well. Immedialty in front of the suspension is the transmission. Rather than having the common four speed tranmissions found in 8880 and many other MOC, this transmission has all the gears in a single plane. This add a couple of gears, but it allows for a lower car, which works great at this scale. The output shaft exits the transmission on the non-driver side, and goes up and over the rear suspension where it connects to the boxer 6 at the rear of the car. Finally, I added a simple double A-arm suspension on the front.

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By the 16, I had an introduction to the body work, and the steering had been finalized. I added a drivers seat and worked on the roof , and a draft of the front hood was done on the 17th. On the 18th, I submitted for feedback to the internet a couple of designs for the front hood. I finalized the hood and the rear quarterpanels on the 19th. By the 20th the exterior details were done, and I stopped posting work in progress pictures. After a week of solid building, I took a couple days off and made a 12 part Bricklink order to cover the few white parts that were needed.

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I then spent the next couple of days finalizing the interior details, including the dashboard, a full roll cage, and the engine details. The MOC was done by the 25th, which means I completed it in 15 days, faster than anything I have ever built.

911 Side

The MOC worked well. The suspension was taught, and functioned well. The steering lock was a little limited, but it worked smoothly. The transmission was a little gummy in gear one, but two through four worked great. But did it look like a Porsche? Yes, but some parts bothered my eyes a little, such as the spoiler, fenders, and hood. Basically the shape is there; you can tell what car it is, but from some angles, you cannot tell it has flared fenders. The hood does not look as curvaceous as it should, and the spoiler looks like an add on. The colors looks good, but a little more great would be great. Overall, I was pleased with what I did in 15 days, but next time I will be a little more particular.

Until next time, happy building.

 

Kenworth T47


The Kenworth T55 is my favorite Trial Truck I have built. It’s not the best looking, or the most capable, or the most reliable, or even the most popular but it’s the one I keep coming back to. My latest truck is a continuation of the Kenworth series of trial trucks. The T55 would pull a stump, the T47 is quicker, has better steering, and more compliant suspension.

T47

Right from the beginning I knew the truck would have a similar cabin at the T55. It would continue with the four wheel steering, and I added an independent suspension. The dimensions would stay close to the same. From there anything else was fair game. I started with the axles. The new suspensions arms made it a little bit easier to make a good independent design. A CV joint was used at the steering knuckle, which allowed for the steering pivot to be near the wheel. Each wheel had about three studs of travel.

The XL motor was placed on the left of the center line and the rechargeable battery box was placed on the right. A newly acquired Servo Motor was placed rear on the centerline directly in front of the rear axle. I had a little more space left, so I added a simple two speed gearbox. A little more space remained so I added a flat six engine.

T47 Engine

Part of my attraction of the T55 has been it’s coloring, and it’s shape. I wanted to keep the attraction similar, but in a way that would differentiate the trucks. I have been acquiring some green lately, so I thought would be a great color. The cab is basically the same, but now it can tilt so you can work on the engine.

The off road performance was not great on the T55, and the T47 was similar. The independent suspension had too much play at the wheels to be great at steering, and the articulation was not very supple. The truck was great to drive around my house, but when I took it outside it did poorly. The suspension design is better than my last independent set up. There was no slipping of the gears. I think my next design will use the same knuckle, but design a different steering connection. This truck again proves the use of knob wheels rather than a differential for a trial truck. Feel free to make your own, and let me know what improvements you developed.

Happy Building.

Flat 6


Every once and a while I get picked up by another LEGO blog. I am honored when it happens as it show others value my work. However, it seems to happen when I lease expect it, and in creations I find fun, rather than significant.  Thank you none the less.

Thanks to the Lego Car Blog for posting my Dune Buggy and my Zil 132, and The Brothers Brick for Posting my Rumble Bee.  Spreading thirdwigg is deeply appreciated.

THE LEGO CAR BLOG

This monster dune buggy was unearthed by the Elves on MOCpages. K Wigboldy has included steering, all round independent suspension and, best of all, a huge six cylinder engine hanging out the back.

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