Sheepo Posted May 4, 2011 Posted May 4, 2011 (edited) This is previously called SuperCar 2011. Continue from this article: SuperCar 2011 - Chassis Note: PDK is the Porsche’s name to his dual clutch gearbox, and 997 is the generation (5th and actual). Below you can find a more accurate description of the mechanisms As fast details, the car weight 3.65kg, with around 3500 parts and more than 6 meters of wires Final dimensions: 74 studs length, 31 width and 22 of height. The car maintains all proportions of the real 911, either some of them hard to believe for example: - the steering wheel axle is up to 22 degrees from the horizontal, as the real 911. - the steering wheel turn exactly 2.6 laps, as the real 911. - have a axle load weight, in 40% front and 60 rear(1460/2190gr), as the 911 Turbo Cabriolet version. Electric system: - 3 PF controllers - 3 IR PF Receivers - 2 RC motors - 1 PF XL motor - 5 PF M motors - 3 PF light - 2 Lithium batteries - 1 PF switch - 3 PF wires 50cm - 3 PF wires 20cm Both lithium batteries are inside the front axle, there is the boot too, with 5x11x6 studs you can hold a PF controller. For turning on or off the batteries is not necessary to open the hood, you only have to push a little lever located on the left side of the steering wheel. Just in front of the co-pilot seat you can see a lever to open the hood. The doors have a real lock, to open them just click the handle and will open smoothly. To close it, you only need push it and it will self-lock. From now I’m not going describe with precision the internal mechanism, but as little resume of the PF controlled functions: - Front steering with working steering Wheel - Front and rear lights - Rear retractile and adjustable spoiler - Folding top - Handbrake - Disc brakes with rear lights - Dual clutch gearbox with 7+R speeds and auto-selection clutch I have omitted a couple of PF functions related with the transmission, because they are too complex and would require an extended explanation. I’ll do it on a few days… Possibly, the most “wanted” photo for Lego Technic followers: Complete Chassis I have also copied (within the Lego limits) the structure of chassis and axle designs. Unibody Chassis Here you can see the car's unibody chassis, which is the most important and the more complicated part. It is very rigid and light. Front axle I have designed a McPherson as the 911 use. It has suspension, steering, disc brakes and drive. Also this axle includes other mechanical features: - Camber angle (~2 degrees) - Ackerman steering - Caster angle (~3.36 degrees) Rear axle This is a multilink axle type, as the 911 uses, which is much more realistic and also allows me to get away from the typical double-arm axles used in almost every Technic MOC. As extra feature this axle has camber angle(1 degree). If you want more information about the chassis follow this link: SuperCar 2011 - Chassis Gearbox and transmission For describe more easily how the transmission works, I will go from drive motors to the wheels. To start with, the transmission sequence has changed, from real: - Engine -> clutch -> gearbox -> transmission -> wheels to: - Engine -> gearbox -> clutch -> transmission -> wheels I’ve done it this way to keep the gearbox turning in every moment, so the transmission operates more smoothly. Drive motors For drive I have used two RC motors, because this combination is smaller than using 4 XL motors. Each motor is connected to a battery (you can not connect 2 RC motors to one battery without electrical cut). The motors send the transmission to the gearbox and to the fake engine, the classic Porsche Boxer-6. Gearbox As I previously said, I have used a dual clutch gearbox (Porsche’s PDK). Really dual clutch gearboxes are two gearboxes, one with even speeds and reverse (R, 2nd, 4th and 6th) and other with odd speeds (1st, 3rd, 5th and 7th) Here you can see gearbox structure: Also I have copy the speeds ratio (or very close…). A little graphical comparison between the real gearbox ratio and my MOC version (start with 1st=1): The gearbox has a speed indicator over it. In any moment you can know the selected speed. Clutches I decided to do the never-done-before: radio-controlled friction clutches. Obviously the car has two of them, one behind each seat. Probably, the mechanism for controlling them have been the most complicated challenge I’ve ever had. Here you can see a little picture with clutches design: The system push the last liftarm to the axle, and the round brick pushes the wheel to the first plate. By this system, torque passes over it and finishes in the transmission. Clutches working Clutch selection comes from gearbox through some mechanism and finished in the corresponding clutch. And now, the best part of the car: the strength to push the clutches don’t comes from gearbox, comes of secondary motor, controlling this motor you can control the car movement, regardless of the accelerator, as a real clutch pedal!!! While you keep the secondary motor working, the corresponding clutch will be connected, so when you let it go, the clutch will self-disconnect and the car stops. After the clutch, the force goes to central diff, and from there to the axles and wheels. I know that is very strange, now I am filming a video with all features working. Accelerator To avoid having to keep two functions pushed at the same time, you can select a velocity for drive motors. Both motors velocity are controlled by the integrated regulator in lithium batteries, this last one is controlled by an M motor from the remote control. Another way to make that is using a train controller, but that forces me to use a forth IR receiver. In this picture you can see the regulator gears: The front and rear lights works at the same time that motors. The mechanism has a cap to prevent the motors turn in opposite direction. If you want to go back, you should select reverse in the gearbox. A video with all features: http://www.youtube.com/watch?v=ZnGj4wxsNZY You can see more pictures and information in my web site: sheepo.es I hope you like it!!! Thanks for reading!!!, and in a few days the mechanical features. Edited May 14, 2011 by Sheepo Quote
Milan Posted May 4, 2011 Posted May 4, 2011 Truly fascinating model! Looking forward for full explanation. Quote
legolijntje Posted May 4, 2011 Posted May 4, 2011 What a great car I can't wait to see a video and how it works! Are you also going to make a sr3d file of the whole car or do you only make the chassis? Quote
MarcusB Posted May 4, 2011 Posted May 4, 2011 Finally, the debut of Sheepo's new Supercar and WOW does it deliver! This is the greatest technic creation ever! It is stunningly perfect in every way. I don't think anyone could do a better car strictly out of technic parts like this. This is leaps and bounds above anything I have seen to date(except for Sheepo's last Bugatti Supercar) Amazing amazing work! Quote
P4trickvH Posted May 4, 2011 Posted May 4, 2011 Nicely done sheepo, i like it better with the roof closed. Also like the rear of the car. You did a great job! Quote
bord4kop Posted May 4, 2011 Posted May 4, 2011 Amazing! As a great fan of the 911 I am stunned, awesome work there! :thumbup: Quote
Fuzzylegobricks Posted May 4, 2011 Posted May 4, 2011 Nice work! I am glad another porsche has appeared here. And it even can convert to having a roof! Quote
Meatman Posted May 4, 2011 Posted May 4, 2011 Wow, this is really something special. Great job Sheepo. Quote
Bricksonwheels Posted May 4, 2011 Posted May 4, 2011 This is really good work! I love it, one of the best Tecnic cars for sure I have seen, especially with all the functionality. Thumbs up! Quote
apemax Posted May 4, 2011 Posted May 4, 2011 what a utterly brilliant Technic moc. There are no words to describe how amazing this is. Well done. Quote
Meatman Posted May 4, 2011 Posted May 4, 2011 Article’s next part will include the transmission system, where I’ll show the real technical advance compared to any other technic MOC. Everything will be completely new and different to anything you’ve seen before… That is a very bold statement to make. I am sure many eyes will be focused on this New Technology. Quote
hga09 Posted May 4, 2011 Posted May 4, 2011 Excellent work! Did you consider flipping and rotating the 3x5 liftarm at the top front of the rear fender (32250) such that it simulates the air intake for the rear brakes? A couple of other relatively rare Technic panels (49815/49816) may also work quite well in that area. Quote
Sheepo Posted May 4, 2011 Author Posted May 4, 2011 Thanks to allfor the commentaries!!! What a great car I can't wait to see a video and how it works! Are you also going to make a sr3d file of the whole car or do you only make the chassis? Now I am editing a video of all functions and translating the next part. My intention is make a SR3D file with the complete car, but without the gearbox selector, this is an industial secret LOL Quote
Shawn Posted May 4, 2011 Posted May 4, 2011 Any chance that you will post instructions to this? This is incredible! Quote
dbostream Posted May 4, 2011 Posted May 4, 2011 A real beauty for sure. Just out of curiosity, approximately how much time did you spend modelling and building? Quote
dongo Posted May 4, 2011 Posted May 4, 2011 I saw it working last weekend and I can only say that it is AMAZING. Sheepo made a presentation of his 911 and I could hardly follow him with the so many different elements that has magically put in no space at all. Cogratulations again. Quote
Paul B Technic Posted May 4, 2011 Posted May 4, 2011 Outstanding, very well designed and built. Paul Quote
olaf9198 Posted May 5, 2011 Posted May 5, 2011 (edited) cool but were are al the funcions for Edited May 5, 2011 by olaf9198 Quote
Sheepo Posted May 6, 2011 Author Posted May 6, 2011 Ok, I am here to continue the explanation. Complete Chassis I have also copied (within the Lego limits) the structure of chassis and axle designs. - Unibody Chassis Here you can see the car's unibody chassis, which is the most important and the more complicated part. It is very rigid and light. - Front axle I have designed a McPherson as the 911 use. It has suspension, steering, disc brakes and drive. Also this axle includes other mechanical features: - Camber angle (~3.36 degrees) - Ackerman steering - Caster angle (~2 degrees) - Rear axle This is a multilink axle type, as the 911 uses, which is much more realistic and also allows me to get away from the typical double-arm axles used in almost every Technic MOC. As extra feature this axle has camber angle(1 degree). If you want more information about the chassis follow this link: SuperCar 2011 - Chassis Gearbox and transmission For describe more easily how the transmission works, I will go from drive motors to the wheels. To start with, the transmission sequence has changed, from real: - Engine -> clutch -> gearbox -> transmission -> wheels to: - Engine -> gearbox -> clutch -> transmission -> wheels I’ve done it this way to keep the gearbox turning in every moment, so the transmission operates more smoothly. - Drive motors For drive I have used two RC motors, because this combination is smaller than using 4 XL motors. Each motor is connected to a battery (you can not connect 2 RC motors to one battery without electrical cut). The motors send the transmission to the gearbox and to the fake engine, the classic Porsche Boxer-6. - Gearbox As I previously said, I have used a dual clutch gearbox (Porsche’s PDK). Really dual clutch gearboxes are two gearboxes, one with even speeds and reverse (R, 2nd, 4th and 6th) and other with odd speeds (1st, 3rd, 5th and 7th) Here you can see gearbox structure: Also I have copy the speeds ratio (or very close…). A little graphical comparison between the real gearbox ratio and my MOC version (start with 1st=1): The gearbox has a speed indicator over it. In any moment you can know the selected speed. - Clutches I decided to do the never-done-before: radio-controlled friction clutches. Obviously the car has two of them, one behind each seat. Probably, the mechanism for controlling them have been the most complicated challenge I’ve ever had. Here you can see a little picture with clutches design: The system push the last liftarm to the axle, and the round brick pushes the wheel to the first plate. By this system, torque passes over it and finishes in the transmission. - Clutches working Clutch selection comes from gearbox through some mechanism and finished in the corresponding clutch. And now, the best part of the car: the strength to push the clutches don’t comes from gearbox, comes of secondary motor, controlling this motor you can control the car movement, regardless of the accelerator, as a real clutch pedal!!! While you keep the secondary motor working, the corresponding clutch will be connected, so when you let it go, the clutch will self-disconnect and the car stops. After the clutch, the force goes to central diff, and from there to the axles and wheels. I know that is very strange, now I am filming a video with all features working. - Accelerator To avoid having to keep two functions pushed at the same time, you can select a velocity for drive motors. Both motors velocity are controlled by the integrated regulator in lithium batteries, this last one is controlled by an M motor from the remote control. Another way to make that is using a train controller, but that forces me to use a forth IR receiver. In this picture you can see the regulator gears: The front and rear lights works at the same time that motors. The mechanism has a cap to prevent the motors turn in opposite direction. If you want to go back, you should select reverse in the gearbox. Comming soon the last part with the final mechanism. I hope you like it!!! Quote
DLuders Posted May 6, 2011 Posted May 6, 2011 (edited) Wow, Sheepo, this is quite possibly one of the most advanced Lego Technic cars ever built! The attention to detail is exceptional. Every "Porschephile" is going to want one of these! Edited May 6, 2011 by DLuders Quote
prateek Posted May 6, 2011 Posted May 6, 2011 Wow! This is the best Lego Porsche I've ever seen! The curves and overall shape are just perfect! I really love how you made a working gearbox, with ratios close to the real thing. Quote
Frequency Posted May 7, 2011 Posted May 7, 2011 (edited) this is truly awesome the additional explanation and modelling of the functions really helps in appreciating the scope and attention to detail involved in building a model of this scale i see looking at the underbody shot that there are some small half bevel gears just rear of the front axle and just forward of the rear axle after trying to track back their function for a while i can only guess that they're there to prevent the axles they are on rotating? so that you could use long axles as the pivot for the lower suspension arms? the back ones i'm still not sure Edited May 7, 2011 by Frequency Quote
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