Forest Fire Truck


Everyone once and a while I see a design I like so much, I copy it. So thanks to Horcik Designs on the fun little Fire Truck that I copied. Thanks for the inspiration.

The full gallery may be found on Flickr and Brickshelf.

When I found Horcik’s fun little Fire Truck, I was immediately enamored with the look of the truck. After deciding I was going to make it, I started looking for additional features to add to the excellent design. After finding some great ideas of a Renault version (2), I decided to get to work. The truck started with a 4×4 driveline and an I-4 engine. I used a simple live axle setup with 9l steering links to keep the sway movement in check, and both axles used a Panhard link. The steering was actuated with another 9l steering link, rather than the more common rack and pinion setup. This allowed for a lower engine mount, and something a little different in the design. The steering can be moved by both lights on the roof of the cab.

Which brings us to the cab. I wanted to use the face of Horcik’s truck, but wanted to add some changes. I added two doors to make the cab a little longer, and added four of the new panel parts that work great as seats. Then I made sure the cab could be tilted simply, and connected the two roof lights to the steering. You can see the engine and the steering when the cab is tilted.

Then off to the body. It turned out to be more simple than I had planned. I had some ideas for a hose reel, a roof mounted water gun, and various cabinets with tools inside. Every idea I tried was a little ugly, or boring. So, I closed up the design with a couple of water tanks inside the body of panels. It’s not fancy, but the design turned out clean, which is what attracted me to the project in the first place.

The design worked fine, though the front axle could be a little more robust. It was not a complicated build, but it was a fun one. Don’t worry, there will be complicated builds coming soon.

Happy Building.

Advertisements

BMW R nine E


As a LEGO Technic builder, form generally follows function. Sure, I make most of my MOCs aesthetically pleasing, but the joy and the priority of my builds, is what they can do. But every once and while, I flip this. I set out to make a motorcycle that looked a certain way, and adding in as many features as I could.

The full gallery can be found on Flickr and Brickshelf.

I have been planning to build a motorcycle for some time, and the 2017 Rebrick contest was a good impetus to finally make good on that claim. The contest theme was to build a BMW motorcycle for the future. So while keeping a couple design themes in mind, I could let my imagination go wild. I used Ian McElroy’s excellent Kickboxer concept as a basis. My bike would be dual single sided swingarms, a boxer electric motor, steering, and front and rear suspension, with drive front and rear. Oh, and I had to use the sweet 8420 wheels.

I started with swing arms. The front would be tough as steering with the swing arm would be tricky. I settled on a design with four steering links mounted in a square. This would allow for suspension movement, and the parallelogram linkage would allow for a virtual pivot close to the wheel centerline. I quickly learned adding a drive axle was not worth my time. The liftarm was connected to the handle bars with a series of links and liftarms. Technically, it worked, but it was a little sloppy. The rear swing arm was more simple. After toying with a rear driveline idea, I found it to be clunky looking, so I reverted to a design that mirrored the front. So now both drivelines had been given up.

The body was little more straightforward. Keeping with many BMW motorcycles, I wanted to keep the two cylinder Boxer motor. Since my bike would be electric, one motor would drive the front, and one would drive the rear. The battery was mounted low, and under motors and covered by the panels. I added a seat with seat back pod, and a tank. The tank was for small luggage, since the fuel tank was no longer needed due to the battery. I wanted to keep the sides free so you could see the frame, but it looked like it was missing something. I added two panels, which to my eyes seems about right. The small blue subframe under the seat gave a little additional color.

The bike looked good to my eyes, but the functions were lacking or did not function well. The suspension was gummy, and steering was sloppy. The bike lacked a drivetrain, which is the whole reason I build in Technic. It was fun to build a Motorcycle though, so I’ll make another one soon, but I think this time, I’ll use some more common design themes and building techniques.

Until then, happy building.

Unimog U90


About 3 months ago I purchased a set of four Fischertechnik tires from ebricks.ru. After seeing a review of them by RM8, I reached out to him, and he mailed me a set. After a little time, I finally have something to show with them.

Unimog U90

After playing with a number of ideas, I decided to do another Unimog. It’s easy to motivate myself to build a vehicle I love. This time, I wanted to do the unloved U90 (418) version. It was not a terribly successful version, as many find the hood…not one of the best. But few people have built this version, so I was up for it. I put to to a vote on Eurobricks, and the decision was to build it in green. Off I went.

The scale required a 27 stud wheelbase and a 19 stud width. I built the front and rear axles and tied them together. Through a couple of edits, I finally added the suspension and figured out how to get portal axles into the truck. The Power Functions XL motor was mounted just over and in front of the rear axle driving power to all four wheels. The Servo motor was placed directly ahead of the XL for the front axle steering. I added a four cylinder fake engine over the front axle. The rechargeable battery box was placed over the rear axle.

Unimog U90 Driveline

The suspension is a live axle setup, with four hard shock absorbers at each corner. Each wheel has about 2 studs of travel. Not much for a Unimog, but enough for a 418. At this point I started a draft of the cab, and a draft of the bed. At this point the truck had an identity crisis. Move forward with green or find another option.

Unimog U90 Bed Tilt

Building LEGO Technic with green is not the easiest. The color lacks 1×5 and 1×11 beams. Both of the these parts would be needed for the bed and the cab. I could make some things work for the 1×11 in the hood, but there was no other option (read, inexpensive option) for the 1x5s needed for the bed. I toyed with other colors for the bodywork; orange, white, blue, yellow. None of them had the right pop I was looking for. Other than the orange, but, as other have said, orange has been done too many times. Then it dawned on me, “why not use plates?” I had my solution. With one bricklink order, I was done.

The truck drives well, and is easily controllable. The front portal axle can use a little strengthening, so serious trial abilities are lacking with this truck. Both the bed and the cab can be easily removed. I ran out of space for a ram to elevate the bed, but it can tilt three ways. I was pleased with how the truck turned out. It looks great. The driveline coule use some improvements, so I will make those improvements on the next truck.

 

Concept John Deere Bulldozer


In what is becoming a little bit of a theme, I submitted another design for a Lego contest. In the long line of Eurobricks.com contests, the Technic Challenge 10 called for a pneumatic build. Challenge accepted!

Full Gallery Here

Concept John Deere Bulldozer Left

The contest had very few constraints other than the build had to use Pneumatics. As I have mentioned before, working with pneumatics is not my preference. I don’t like them, so it was good for me to step out of my comfort zone.

I was feeling especially creative this time, so I thought about a number of concept ideas. Pneumatics do not tend to work smoothly when lifting arms so I decided against an excavator and a loader early. Additionally, I was not willing to invest in additional parts for this project. After a couple of drafts, the idea of this bulldozer was born. Taking some inspiration from some of John Pope’s design, the basic idea was there. The dozer would have different tracks, a three movement blade, a crazy engine, and a forward thinking design.

Concept John Deere Bulldozer Blade

I started with the tracks. After moving the axle points four wheels countless times, I came up with a design I liked. I made another one, and linked them together. The I worked on the blade. The dozer would have a lift, tilt, and side to side angle adjustment. After playing around with some idea, I found a solution I liked. Two pneumatic rams were on the front to lift the blade on the top. Then two links were connected low on the two sides of the blade, and then on each side of the dozer. These points on the dozer were moved fore and aft by on pneumatic ram each. These side rams would move the blade left or right individually, or together they would tilt the blade up or down. Additionally, it allowed all the tubing to be internal.

Concept John Deere Bulldozer Open

I added a small compressor powered by a Power Functions M motor, and the battery box under the cab, and added the 16 cylinder engine (coupled V-8 and Flat 8). The cab was easy to get the shape I wanted, and gave me some space for another pneumatic ram to open the hood. I then decided to add a ripper since I had one pnuematic left. The new 1×11 ram a great addition, but a little more power could have been used for the ripper.

Concept John Deere Bulldozer Chassis

I was pleased with the look the bulldozer. The functions worked well, but on reflection, the were not exciting enough to be competitive for a contest. After two pneumatic builds in a row, I find some of the frustrations I have with them remain, but I am discovering some charms as well. We’ll see what comes next.

Happy building.

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.

714

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.

714 WIP1

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.

714 WIP2

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.

9393 Updates


Every once and a while, I find myself building an older set from my collection. I find it relaxing not to think about design and simply follow instructions. Recently, I built LEGO’s 2012 set 9393, and after a couple of days, I thought, it needs something else.

The full gallery may be found on Flickr and Brickshelf. Instructions may be found here.

9393 Harrow Furrow

The LEGO set was simple with steering, lime green color scheme, a mower implement, and a system to raise and lower the implement. I decided it needed a fake motor, front suspension, a drive differential, and some bigger front wheels. I started building. Adding the motor proved to be more difficult than I thought it would be. By adding the larger front wheels, I was able to get the steering axle lower by one stud. This allowed space for the engine to be added, but did not solve the structural problem of how to mount the front suspension. I ended trying a number of solutions, but ended with one with many connectors, axles, and two liftarms running over the front axle beside the fake engine. I would prefer it to be a little more stiff, but it works. As I built the front of the tractor, I found myself adding an implement attachment point. I thought, maybe I should make another implement for the front.

9393 Engine

This is where the project grew, and grew….

Now, only the mower implement was not enough. The tractor needed a plow, counterweights, a furrow, a harrow, a tiller, and a grain cart. All of a sudden this project became much bigger. I started with the snow plow. It is a simple design with a little worm gear lift attachment. Using this type of mount, I constructed a simple furrow implement as well. The multiple wheels are meant to smash larger clumps of dirt, and push stones down under the soil. I added a basic group of curved liftarms for front counterweights. All three implements are attached by removing two axles.

9393 Snow Pusher

Most tractors have a three point attachment on the rear. The base 9393 has a two point attachment, which does not allow for a parallel movement as the impliment is raised. I went back and forth on changing this attachment point. In the end, I decided adding a parallel linkage would require a another PTO universal joint. I was not willing to add this, as it would put the implements too far behind the tractor. As such, I kept the stock 9393 motor implement the same. Using the same attachment point, I build a small harrow. The harrow is driven by the PTO shaft. Finally, I build a tiller with the fun little claw parts. I added a drawbar and a pivot, so this impliment would stay parallel to the ground.

9393 Tiller Rear

Because I still did not think this was enough, I added a hitch to the tractor, and built a grain cart. It is a simple single axle design, with sloped sides. There is a conveyor on the bottom, and a folding auger for grain extraction. Both are geared together and can be opperated by a rear HOG gear. OK, I realize it is not an auger, but rather a chain. At this scale, I could not figure out a good auger solution that did not look clunky.

9393 Update Grain Cart

Before I could think of more implement, I said “I’m done.” I was please with how it turned out. All the implements were fun, and give the MOD much more playability. The grain cart was fun to build, and made the tractor look grand. I wish the chassis of the tractor was a little stiffer for the front suspension. I had a lot of fun with this build. I am going to build another tractor before this year is done.

Until next time, Happy building!

K-Tec 1233 Scraper


I find myself on diecastmodels.co frequently as it inspires many of my future builds. Most of the time the site gives me reference pictures, and sometimes it shows me something I have never seen before. This is the result of one of those late night browsing sessions.

See the full gallery at Brickshelf and on Flickr. Instructions may be found here.

K-TEC 1233

I wanted to make a scraper, and once I was browsing this site, I came across the K-Tec. It was a different set-up that I thought looked fun. I was hooked. Early I decided the MOC would be perfect for the newer 49.5×20 tire, so the tire set my scale.

I started with the suspension for the tractor first. I did not have too much room to work with on the rear, so I set two differentials together, and connected them via two 20T gears. The rear one connects above to a 12T gear, which transmits rotation to the fake motor in the front. The two axle assembly pivots at this gear connection and connects to the rear wheels, so no u-joint is needed. The middle axle connects to the rear assembly through the differential connecting axle. This simple set-up allows for all four wheels to move freely, and independently.

K-TEC 1233 ADT Suspension

I then added the front cab. It is not too complex with a differential fixed for the front axle, and a two-cylinder fake motor above it. A HOG gear is above the cabin which pulls a liftarm for the steering. A turntable is used to provide articulation between the cab and the rear chassis. Then a simple body was made, and off to the scraper.

K-TEC 1233 Tractor

I then worked on the scraper part; kind-of. I knew when I started this project I would need a bunch of 1×6 arch bricks in yellow for the front gate. There are not many of them, so I started ordering them over the course of three months. As each would  arrive, I worked on the scraper. I first set the dimensions and worked on the lifting mechanism. It was a little tricky to find the correct geometry while not taking too much room, and keeping the upper pivot point small while using to mLAs for the movement. I found a good solution, but a little more stiffness in the assembly would have been great. I added an extraction plate at the rear driven with a worm gear assembly resting between the rear wheels. Another stud of travel would be great, but it was not worth adding another four stud gear rack to make that happen. Finally, all the parts arrived for the front gate, so I installed it. Because the walls of the scraper are only one stud thin, I did not want to mess with the thickness of the sides to much by adding a mechanism for the gate movement. Each assembly I tried with a mLA or a worm gear set-up looked clunky or bulky. I ended up with a friction pin with a gear to move it. It is not very fancy, but it works well. At this scale, it is all that needed.

K-TEC 1233 Gate

All in all, the MOC turned out OK. It would have been better to have a stiffer hitch arm, and I would have liked a different solution for the entry gate. I was pleased with the size, and I enjoyed packing a number of features into the small (but long) MOC. Finally, for some reason the MOC does not please my eyes as much as those first pictures I saw on diecastmodels.co. Maybe it just needs to be a little bigger.

Until the next one, 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.

911 WIP 2

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.

911 WIP 2

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.

WIP 6

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.

 

Audi allroad


There are not many projects I start that I do not finish. I can count a couple. But, sometimes there are projects that take a long time to complete. I either loose motivation, lack parts (read budget), or find something else to do. If I were wise, I would toss the project, and move on to something better. But there is value to trudging through the slog and completing something difficult. The Spitfire is a great example of this. The Audi Allroad has been on The Queue for about 16 months, and it’s finally done.

The full gallery may be seen on Brickshelf or on Flickr.

Audi allroad

After completing the OCTAN F1, I thought I could use the suspension for an all-wheel drive car. I was sure I could make the front suspension with steering work at this scale.

allroad Suspension

I wanted it to have another fun feature, so using a bunch of differentials, I developed a simple three speed transmission. Three power functions motors are connected via two differentials which connect to the drive axles. Each differential acts as a subtractor between each motor. When one motor is running, the power moves through two differentials, and the car moves slowly. When two motors are running, the power moves through one differential, and it’s a little faster, and when all three motors are running the car is running the fastest as no differentials are splitting the power. I got it to work, and within a day, I had a working chassis.

allroad Driveline

Once this was done, the MOC sat on my desk for a long time. This past fall, Thirdwiggville welcomed another citizen to the village, and this gave me lots of time late at night to get back to working on this project. I spent a couple of weeks working on the body work with the perspective of “finish this.” So the body work could use a little more polishing; doors, mirrors, better lines, maybe an interior. But I was happy to finally get this done.

The MOC worked well. The suspension functions quite well at this scale, and the transmission was simple and effective. It could be a little quicker, but I was not going to make a substantial gearing change after the MOC was built.

Two final thoughts. I need to stop building supercars because they take a lot of time and effort for me, and I find little motivation for the body work; I do not think the body work looks good, and I lack motivation to work on it. Second, I needed to test the driveline earlier in the build process. I spend too much time fiddling with gear ratios after everything was build. But this project is done, and I am happy it is.

Happy building.

CAT 586C


My favorite constructions vehicles are feller bunchers. The wheeled ones. So I am naturally inclined to make them. I built a small one; I built a large one. I wanted to build a medium one, but I figured I should get out of the box. At least this time.

The full gallery may be seen here, and instructions may be found here.

CAT 586C

The CAT 586C is a site prep tractor. Forgive me for simplifying the work done by the engineers, but the tractor is basically a 573C with a new implement for site preparation, rather than felling. As always, I stared with scaling the full tractor from CAT’s website, and finding a size that would work well with tires, features, and aesthetics. Then I started building.

CAT 586C Rear

I started with the chassis, to get a sense of the size and the layout. I had a good idea of all the features I would want, and I knew some planning would be required. I then finished the mulcher (implement), which is basically a rotating drum with lots of teeth on it. I used a bunch of 24 tooth gears, and connected them to a rotating driveshaft. The chassis was built with four wheel drive, and was connected to the mulcher driveshaft through a series of gears to increase the speed of the drum.

CAT 586C Underside

Then on to the back of the tractor. Feller bunchers and site prep tractors all have their engines in the back; pretty normal for large tractors with large front implements. But to get the weight as far back as possible, the engine is mounted transversely. This presented a couple of challenges for me. I mounted a I-3 engine on the left in the rear with simple gearbox geared up to connect it to the drivetrain. Just in front of the motor are the two cooling fans, which are also driven by the drivetrain. These are also geared up. For those of you keeping score at home, the drivetrain gears up three separate functions, so rolling the MOC on the floor causes a nice whizzing sound.

CAT 586C Driveline

I added some additional features that mirror the real tractor. First, over the mulcher there is a guide bar that allows the tractor to push trees and shrubs down toward the mulcher. In my MOC this is accomplished by a simple worm gear mechanism. Second, I added a small winch on the rear to get the tractor out of sticky situations. Finally, a small mulching door was installed to allow for more or less entry to the mulcher, again just like the real tractor.

CAT 586C Mulcher

The tractor worked well. Functions were smooth, and required no maintenance during play. The many controls on the front were a little dense, and this caused some finger congestion. The number of rotational features connected to the drivetrain made rolling on the floor a little strained. Thought, this kept the MOC from rolling off the table into a lot of pieces. Everything worked well enough, so maybe it is time to make another feller in this scale. Not today, I still have a lot of other projects to complete first.

Happy Building.