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Porsche 911 (997) Turbo Cabriolet PDK + Video
About this creation
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

The use of each element will be described below
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.

As outstanding remote controlled features:

- 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

The folding top and spoiler secuence.






Possibly, the most wanted picture 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 (~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.

Brakes

The car uses a disc brakes system in all wheels. The brakes are actuated by the same motor who actuated the clutches.




For finish a little video:



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.



Comments

  June 27, 2014
The best lego rc car.The functions are great!
 I like it 
  February 6, 2013
Congratulations for one of the best and most complex models I have ever seen. Your car is simply amazing and a great inspiration to try building more complex models.
 I like it 
  January 22, 2013
I looked at the .ld3 file in Ldveiw, and I have one last question, how do you attach that whole assembly?
 I made it 
  January 20, 2013
Quoting Timothy Dillman I meant, the brake pads to the chassis.
Again, it uses a 6L link for that, look the new last pictire and you will understand it
 I like it 
  January 18, 2013
I meant, the brake pads to the chassis.
 I made it 
  January 16, 2013
Quoting Timothy Dillman I looked at your Brickshelf gallery, and, I was wondering, how do you connect the brakes system to the chassis?
With a 6L link(part no. 32005)
 I like it 
  January 16, 2013
I looked at your Brickshelf gallery, and, I was wondering, how do you connect the brakes system to the chassis?
Sheepo's Garage
 I like it 
Charlie A
  October 17, 2012
I love cars! How do u do your creations so well? I saw your video and I was amazed! I didn't know u could make such an advanced transmission.
  August 26, 2012
Nice shaping and awesome everything -the builder
 I like it 
  June 26, 2012
This is so cool! I am making a porche 911 turbo convertable right now so check my page and look at it soon
  May 19, 2012
Perfect work for me.
 I like it 
  May 12, 2012
FANTASTIC!
 I like it 
  May 3, 2012
Best car i've ever seen in lego! O_O
 I like it 
  April 28, 2012
Mindblowing. I have seen it several times but didn't know you have a MOCpages account.
 I like it 
  April 28, 2012
Excellence!This is insane.VERY well done,this is just epic!100/100
 I like it 
  April 28, 2012
Unbelievable quality and full of so many features. And this coming from not LEGO-Technick guy.
 I made it 
  April 27, 2012
Quoting Magic Number 3 Gotta few questions.. What do u build first in ur models? �(when do u make the functions and the chassis or the front and back axles etc.?) �Also, where do u research your models? And what size are the "super street sensation" wheels? They seem larger than the common supercar wheels. Thanks a ton dude, ~Magic
I always make first the gearbox, because usually it is very big and I need to know the final size to built the car aruond it. TO find cars google images it is your solution, search "your model blueprint". This car uses the 8448 set wheels, they are 81.6 mm of diamenter, the normal supercar wheels has 68.8mm
 I made it 
  April 1, 2012
Quoting Evan Fojt I am building the berry first Nissan gtf out of technic but would really need help because I am not very good at desighning so can I please have help you can email me
The best way to learn to make a supercar is try it once, twice, and again and again..
 I like it 
  March 31, 2012
I am building the berry first Nissan gtf out of technic but would really need help because I am not very good at desighning so can I please have help you can email me
Sheepo's Garage
 I like it 
kenneth rattledge
  January 18, 2012
absolutely first class.
 I like it 
  December 26, 2011
This is an insane work! That's so accurate, so full of cool system and details! Kudos for the enormous brainstorming wich made it possible! Regards - Jay
Sheepo's Garage
 I like it 
sean hall
  November 21, 2011
perfect! you should check out my compact clutch, it will work using speed control.
 I like it 
  November 11, 2011
Wow, this is awesome. The Technic details are incredibly correct. As an Automotive Engineer I have to take my hat off! There are so many details, but the working clutch is my No.1. Great job!
 I like it 
  August 25, 2011
OK. That is a shame. If you are not willing to make instructions, then could you possibly take some more comprehensive photos of the gearbox, perhaps?? anyway this is an amazing model and i understand if you dont want to share some of its awsomeness.
 I made it 
  August 23, 2011
Quoting Oli T WoW this is seriously the best technic creation ever made. How on Earth did you manage to make an independently controlled dual clutch this is simply amazing. I also like the way you put all the RC functions into three recievers. Very neat. Although the door handles were the part which made it for me. I heard that some instructions for the Gearbox and possible the clutch and motors aswell might be on there way and I was just wondering when they might be available. ALso I was just wondering if some photos of the inside mechanisms a bit like what you had with the Bugatti Veyron could be taken possibly. Anyway this is uterly amazing seriously, you are bridging the gap between lego cars and real ones/ I bet that when supercar 2012 comes out youll actually be able to drive it.
Thanks for your comment!!. But I don't have instructions for the gearbox or time to make it :(
 I like it 
  August 21, 2011
WoW this is seriously the best technic creation ever made. How on Earth did you manage to make an independently controlled dual clutch this is simply amazing. I also like the way you put all the RC functions into three recievers. Very neat. Although the door handles were the part which made it for me. I heard that some instructions for the Gearbox and possible the clutch and motors aswell might be on there way and I was just wondering when they might be available. ALso I was just wondering if some photos of the inside mechanisms a bit like what you had with the Bugatti Veyron could be taken possibly. Anyway this is uterly amazing seriously, you are bridging the gap between lego cars and real ones/ I bet that when supercar 2012 comes out youll actually be able to drive it.
Sheepo's Garage
 I like it 
Kris Flaten
  August 18, 2011
This is cool, I like how it all functions! My uncle emailed me the video from a website. 10/10
 I made it 
  August 14, 2011
Quoting Sander van Kreijl Hi Fernando, Is there already a 2012 or 2013 project? Perhaps time for a fully automatic multigear gearbox... sure you'll pull it of. As mentioned before, can I persuade you to share your design of the stepper gear shifting motor/mechanism? Cheers Sander
Hi Sanders, now I am working in two proyects, they are around 30%, but none of them are as complex as the Porsche... I have a full automatic gearbox in my future list proyects but nothing more than that. Instructions for PDK gearbox still very far...
  August 12, 2011
Hi Fernando, Is there already a 2012 or 2013 project? Perhaps time for a fully automatic multigear gearbox... sure you'll pull it of. As mentioned before, can I persuade you to share your design of the stepper gear shifting motor/mechanism? Cheers Sander
 I like it 
  July 21, 2011
FANTASTIC!!! 8D
  July 17, 2011
The ant I don't know why I cannot see the instruction of the gearbox of the porche 911 on this page
 I like it 
  July 5, 2011
When I first commented I hadn't seen the video yet but now I have, only to conclude this must be the best technic creation I've ever seen, It's amazing what this car can do, I suppose its driving isn't so much but that's very understandible considering the gearbox and everything else. Most impressive
  June 29, 2011
Jules, you do know that the instructions for the gearbox is a free download on the page?
  June 22, 2011
The ant why you don't send me the file LDD for to test?? ( jules.galinier@live.fr )
  June 5, 2011
ok but i don't know if i will have all pice
  June 1, 2011
Jules: i have made an LDD file with instructions for the gearbox if you want to check it out
  June 1, 2011
ok thank you but you'll do an article and Insturction like the gearbox of Bugati
 I made it 
  June 1, 2011
Quoting Jules Galinier Thanks for your answer but my question was :with which software can you do the gearbox with motor RC?
Ups, sorry :(, It is SR3D. In my opinion SR3D is the best soft for technic creations.
  June 1, 2011
Thanks for your answer but my question was :with which software can you do the gearbox with motor RC?
 I made it 
  June 1, 2011
Quoting Jules Galinier how you do the picture like where you can see the motor rc
I am sorry but I dont have a camera now :(, but there are one RC motor behind each rear wheel.
 I like it 
  May 31, 2011
how you do the picture like where you can see the motor rc
 I like it 
  May 12, 2011
wow
 I made it 
  May 12, 2011
Quoting Sander van Kreijl Looks really great, as (all) said before, but I found a thing/flaw: Why does the car have these dimensions: scale should be approx. 1:7,5 based on length 74 studs and width 31 studs. The LEGO wheels you used would lead to a length of 68 studs and width 28 studs comparing it to the real thing. Is this because of the size of internal technique, or to keep wheel travel (steering and suspension)?
You're right, but I did so to put in all functions. Even so the difference is very small, in 1:7.5 scale the wheels should have 84mm and have 81.6...
 I like it 
  May 12, 2011
Looks really great, as (all) said before, but I found a thing/flaw: Why does the car have these dimensions: scale should be approx. 1:7,5 based on length 74 studs and width 31 studs. The LEGO wheels you used would lead to a length of 68 studs and width 28 studs comparing it to the real thing. Is this because of the size of internal technique, or to keep wheel travel (steering and suspension)?
 I like it 
  May 10, 2011
incredible, everything is greater than great! If i had one of these i'd never want to take it apart, must be a sad day when you do, but then along comes another great creation... can't wait to see what it will be :)
 I made it 
  May 8, 2011
Quoting Ben Shaw Really can't wait for the video! Ahh this is so amazing I feel useless! In the title I think you mean (updated) instead of (uploaded)
Ups, fixed, thank you :)
 I like it 
  May 8, 2011
Really can't wait for the video! Ahh this is so amazing I feel useless! In the title I think you mean (updated) instead of (uploaded)
 I like it 
  May 7, 2011
this is probably the best model i've ever seen i cant wait for the video. what car are you going to do next
  May 6, 2011
it's a good car I love it
 I like it 
  May 6, 2011
That's awesome! I love the 997 911 Turbo Porsche and you've made perfect to the real thing. Awesome details and functions. Excellent work
 I like it 
  May 6, 2011
Superb work!
Sheepo's Garage
 I like it 
Sam Knavel
  May 4, 2011
Wow, great Porsche!
 I like it 
  May 4, 2011
I love the effect you achieved that actually looks like body panels. Many technic builders exceed in the technical aspect, but not the artful side. You, my friend have captured both in a great combination.
 I made it 
  May 4, 2011
Thanks a lot for all your commentaries!!! Now I'm translating the second part and editing a video of all functions :)
 I like it 
  May 4, 2011
Amazing piece of work! Seeing the underside is mind blowing!
 I like it 
  May 4, 2011
you cant be a human. you are too good to be one :O. once again you amaze me with the engineering we love!
 I like it 
  May 4, 2011
Another amazing creation from you, Its even better than the Veyron, the mechanics took the model to an another level, and still has a gorgeous look. Congratulations!
 I like it 
  May 4, 2011
Best creation of 2011 so far. Like your functions explanation, I'll leave any real comment until the details are up on MOCpages, but for now 10/10, because that's the most I can give : )
 I like it 
  May 4, 2011
*Foaming at the mouth* Just wow. I'm nearly exploding with excitement waiting for the technical stuff. *Boom* Re-writing the rulebook once again. Very well done!
 I like it 
  May 4, 2011
this is great! vell done! :)
 I like it 
  May 4, 2011
Coool!, good use of parts for the lights... :)
 I like it 
  May 4, 2011
Awesome! Very well built and looks exactly like one! Great job and keep it up!
 I like it 
  May 4, 2011
very nice, I can't wait to see those mechanical features, it looks great and the mechanical parts are hidden well, I love that compartiment for the remote, great job
 I like it 
  May 4, 2011
The functions of the roof & spoiler alone are great, but with all the extra goodies, its just an over-the-top build.
 I like it 
  May 4, 2011
Looks excellent. Looking forard to the technical descriptions!
  May 4, 2011
Very impressive! You definitely nailed the looks of the Porsche 911 cabrio. It looks intense and dense with all the stuff that's going on. I can imagine you need some extra write-up's to mention all the mechanics and details...
 I like it 
  May 4, 2011
Incredible.. and thanks for the last photo!
 I like it 
  May 4, 2011
WOW!!! amazing!
 I like it 
  May 4, 2011
speechless is all i can say :) yeah!!
 I like it 
  May 4, 2011
Awesome, awesome, awesome, another true masterpiece !!
 I like it 
  May 4, 2011
Finally our suffering is over; no more waiting and now a glimpse at the result! So you have misled me! ;-) My first guess was accurate except for the Cabrio version. great work; hope to see more of all the mechanics soon.
 I like it 
  May 3, 2011
What can I say....always an inspiration for all of us , can't wait to see more !!!!
 
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