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Showing results for tags 'all wheel drive'.
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I usually don't really post much of my work here, but sometimes I'm too proud of a certain model... Like this one. Designed in colaboration with a Slovenian GM racing team, I present you my interpretation of a 1:10 scale Ford Fiesta RS WRC Rally car. The realized functions and features are as following: 4x BuWizz motors for all wheel drive - one for weahc wheel, powered by the outer output 1x PU L motor for steering Independent high travel suspension on all wheels Working steering wheel Powered and Controlled by 2x BuWizz 3.0 Inline 4 cylinder engine driven by the front motors Opening doors, bonnet and rear hatch - the rear hatch usues shock absorbers in a bi - stable mechanis to keep it closed or opened Custom 3D printed wheels for 62.4 mm tires Detailed interior with a rollcage and bucket seats Built out of cca 1650 pieces As usual in such projects, I use a 3D reference model which is imported in LDD in order to create the most accurate representation: Here's the final virtual model - ready to be realized from physical bricks: You can see one BuWizz 3.0 under the bunnet in the front, powering the front wheels and the blue cylinders (half pins) of the inline 4 engine: Rollcage is designed with a mix of liftarms and links and it is actually structural. You can also see the second BuWizz in the rear: Anotehr view of the opened up model: Bottom view, showing layout of the motors - Front motors are just behind the grille, it was a really tight fit: Once the digital model was done, it was time to build it from real parts, 3D print the wheels and apply custom stickers. Here's the final result: I'm really happy about the shaping, there are almost no staright lines, almost all the panels are at an angle, for example the curved 3x11 panel above the rear fenders: As mentioned before, the steering wheel is connected to the steering motor (the blue clutch gear moves it). The steering wheel can also be adjusted using click hinges. Also notice the red fire extinguisher on the passenger side: Soft grey shock absorbers keep the rear hatch closed/opened: Inline 4 clyinder engine is powered by the front motors from the fast outputs via blue rubber belts. They can slip when needed while cornering: And finally here's a video where you can see it in action along with more details: To summarize, thanks to the 3D reference the body is very accurate with almost no straight lines and I'm getting really good at sculpting complex shapes. Great care was also put into keeping the car as light as possible so it reaches over 15 km/h, yet has enough torque to drive/jump over bumps, hills, etc... Thanks to the Audi's hubs, the suspension has a lot of travel and a single (black) hard shock absorber per wheel is enough to support it and absorb the hard landings. To conclude, I'm really proud of this model, it's a really nice balance of aesthetics, performance, robustness and fun! -
Few months ago I modified the set 42138 with one BuWizz motor for driving the rear wheels, one PU motor for steering and a BuWizz 3.0 to power the model. This MOD was really fun and all BUT, deep inside I knew I can do better, especially after being inspired by upcoming Bolide (and a bit frustrated by it's lack of AWD). So after a lot of trial and error, fiddling and trying literally all kinds of component placements, I came up with the following MOD: So you may be thinking, It's a different color, so what? It has a fancy diffusor, spoiler and a few body mods but what's different? Well... The answer hides on the underside photo: Yes, this small 1:16 model has all wheel drive with differentials! Not only that, but the rear axle allows for torque vectoring which allows me to fine tune handling, especially adjusting understeer/oversteer. The model has been assembled and tested with real bricks, I will post more media soon. AllI can say for now is that performance is excellent, there is plenty of torque to spin all 4 wheels and it can even do AWD powerslides.
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This model is a result of the lessons I learned while building a mini racer and failing. You can find more details about that here: To create a better mini racer, I increased the scale from 1:16 to 1:12 which allowed me to implement the following functions and features: Independent left/right side All Wheel drive Independent suspension on all wheels Dual 2-speed gearbox Steeering angle of around 30 degrees Working steering wheel Full interior with 2 seats Opening doors and bonnet Built out of 999 pieces Measures 35 x 16 x 10 cm Weight of 1 kg For color, I had the choice between orange and lime, so I went with lime for that Lamborghini look with gold rims: And here's the LDD version in all of it's 999 parts: Here are more photos of the individual groups, starting with main driveline: Gearbox switching system actuated by a PU L motor: Steering and rear hub support system: And finally the suspension system which also provides support for the bevel gears: The driveline is the most important part of the model and it uses two 2-speed gearboxes, each driven by both outputs of the BuWizz motors. A PU M motor switches the gears using the wave selectors. Suspension is supported by 8 hard shock absorbers. The suspension is at quite a high angle of around 25 degrees in order to keep the drive motors, steering motor and BuWizz as low as possible. High suspension angle also pulls the wheels together, allowing for a narrower bodywork. A PU L motor provides some 30 degrees of steering angle to the front wheels and also steers the steering wheel via a secondary steering rack. Everything is powered and controlled by a BuWizz 3.0 hidden in the front. Here's how everything looks like inside the model: More details and video of the model in action can be found in the video: To finish, I'm really happy both with performance and the looks of the model. It for sure fixed and improved mostm if not all the issues with the previous, smaller version. I also can't wait to compete with when the next opportunity shows up.
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For an exhibition I made a small Corvette-scaled car with an RC motor powering rear wheels. Powered by Buwizz, that model turned to be totally uncontrollable, with epic amount of oversteer at low speed and underster at high speed. So I got an idea. Why not make a 4x4 version of a miniature car? My worries were that the added complexity needed to power the front wheels will increase the complexity, weight and reduce the performance... But I decided to give it a shot anyway. The first version used a chain drive to front the front wheels from the rear axle, but that was soon scrapped due to the poor strength of the chain. So after replacing the chain drive with an axial driveline, I came up with this little, yet powerful model. The front wheels are an older 49,6 x 28VR type which use softer rubber than the rear ones. This way the car tends to oversteer less: In the rear DUAL 49,5 X 20 are used to give it as much traction area as possible: The bodywork can easily be removed to expose a torque-tube sytled chassis and a simple interrior: A servo motor steers the front wheels via a rack. Maximum steering angle is around 22,5 degrees: 3x11 panels are used as the main chassis, giving the model very high rigidity, while keeping the weight low: According to LDD the model is made of less than 400 bricks, less than to the upcoming 42109: The front wheels are powered directly by the rear axle via 20:12----12:20 gear sequence. There are no differentials, since the model reaches high enough speeds for wheels to understeer and slip in the corners anyway. Technical specs: Length: 25 cm Width: 14 cm Height: 10 cm Weight: 575 g Theoretical top speed: ~18 km/h Even with 4x4 drive, the racer still powerslides all 4 wheels even in just the normal mode, as you can see in the quick and drity slo-mo gif I made: I was pleasantly suprised by the amount of control you get with the added FWD. No longer am I at the mercy of the rear wheels to stop the car from crashing into a wall. Accelreation is of course much better, making this one of the fastest accelerating models I made. Oversteer has been reduced, but there is still plenty of power left to powerslide the model with all 4 wheels spinning. Stay tuned for a proper video showing off the performance soon.