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Hello again! I’m happy to share my latest Icons-style classic F1 car, the Tyrrell P34! This is the only six-wheeler to ever win an F1 race, achieving 1st and 2nd at the 1976 Swedish Grand Prix. This time, I was able to incorporate a few extra Technic functions into the model while still maintaining the look and feel of an Icons-themed scale model built primarily with system bricks. It features working 4-wheel steering linked to the steering wheel, a rear differential, and even a working fake engine. Here’s an animation showing off some of these features, courtesy of Car MOCs Channel: Design Highlights: Steering I started with the 4-wheel steering, the most prominent feature of the P34, and one that I wanted to be functional and look accurate. It was also one of the more challenging aspects given the scale I wanted to build at. I went through about a dozen designs before settling on a sliding gear rack as the most low profile solution. The ideal part, the 1x10 Technic gear rack (6592) is quite rare, so I adapted by combining a 1x4 gear rack plate (3743) with the relatively new 1x1 plate with vertical bar (3661) and a 1x2 technic liftarm (60483) to maintain the 10-stud track width. The actual car used a single-rack system, but this double rack design was the best compromise I could make to keep the whole steering system under 3 studs of height. Livery Brick-built livery is always a priority for me, and on this car the main design feature to capture was the yellow stripe running down the sides of the cockpit and body. The slight angle of the stripe on the side of the cockpit is achieved by attaching a 1x3 tile to a stud between two wedge plates. It’s a slightly tighter fit than typical connections, but not illegal enough to bother me. The stripes on the sides of the bodywork are also interesting exercises in stud reversal and clip connections, tapering slightly wider and taller towards the rear, just like the real thing. Front Wing Aligning the top edge of the front wing with the car’s nose was tricky, especially while maintaining a smooth slope with brick-built NACA duct cutouts. I couldn’t fit the five metal support rods on the front splitter at this scale, but you can imagine the gaps between the tiles used to build the splitter as standing in for them. I also managed to recreate the small metal plates just in front of the wheels using trapezoid flag pieces. Engine At first, I planned to create a static brick-built you would find in most of the Icons vehicles today. But the lack of an engine cover allowed me to fit a working V8 with a rear differential. Vertical space was still the biggest constraint, as I had to make sure the cams had enough clearance with the ground while making sure the pistons didn’t collide with the velocity stack trumpets at the top. The result is a compact yet functional engine that captures many of the key features of the Cosworth DFV and surrounding engine bay, including support rods and even some suspension elements. A few real life photos: Building instructions and more photos are on Rebrickable. Looking forward to hearing your thoughts! -
The six wheeled Tyrrell P34 was the first F1 model I built back in 2006, using a mix of Technic and System LEGO parts. Since then, I have made several F1 cars covering about three decades, from late 60s to early 90s, all in 1:8 scale. Due to the small front wheels of the P34, the compact front suspension of the first model was working, but was not as accurate as I would have liked. That’s why last year I decided to evaluate the possibility of building a detailed and fully working front suspension for this iconic car, taking advantage of all newest parts introduced by LEGO, as well as old and discontinued ones to reproduce this state of the art model in a bigger scale. In fact, the 22969 rims and 32296 big tires that I’ve always used as rear wheels in all previous models, in this case are acting as the “small” front wheels, in a fully independent double front suspension. There is a single central anti-roll bar that reacts to the displacement of the two front axles. At the same time, the steering rack is directly acting on the front axis, while the movement is then transferred to the second axis through a pivot and levers. As a result, the overall model scale went up to 1:5, and this lead to a completely brick built rear wheel concept, with an internal rigid frame to keep the cylindrical shape and support the model weight without distortion, and an outer layer of rubber elements. In such a large model, I decided to also include some RC features: XL-motor for driving, servo-motor for shifting, M-motor for steering. All of them are controlled with a powerful BuWizz unit. The compact 4 speed gearbox is a reinforced mod of Paul J Boratko III’s solution with the new rotary selector, while the shift drum is based on the concept MK II of P-LEGO, adapted to stay within the side prismatic fuel reservoir. Obviously, inside the cockpit, the steering wheel rotates while steering, and the shift lever moves as well while shifting. Other features are the various brake cooling systems (through NACA intakes and hoses for the front axis, and dedicated ducts for intermediate and rear wheels), a 90 degree V8 fake engine with 0.5 stud pitch between banks, air intake cones, two side water cooling radiators, three oil cooling radiators (two paired with water ones, one on the rear wing support), rear suspension with big 11.5L shock absorbers and stabilizing bar, side windows in the cockpit, and more. Dimensions: 798x389x188 mm Weight: 5.3 kg Parts: about 6’000
