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BOBIDESIGNOffline
Post subject:   PostPosted: Aug 01, 2013 - 12:19 PM
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chrisbarbers wrote:
Bobi, what is this price for, am I the only one who is confused?

Maybe I haven't read enough of this full thread but back in September 2012 you were "8-10 days" from selling these plans "I'm taking pre-orders now until Monday, 24 September, then the plans will sell for their full price" and the pre-order price was 80 USD and 60 EUR and the thread title shows the "regular price", now I know you had HDD issues which might have contributed to the delays... but is the price in the last post for something totally different to what this thread started about?


Hi Chris,

Thank you for your input. Let me try to explain and see if I can answer your questions.

These chassis drawings are to help you build your own chassis of Lamborghini Aventador replica. The chassis itself is not replica (the genuine car uses carbon-fibre monocoque) but original design done by me. Even though the chassis seem complex on pictures, it's pretty straight-forward to build. It's already proven when seeing the fast progress of one of my customers over the Madmechanics forum. No special chassis jigs are required, because I designed the chassis in a way that you can build it in several main flat sections that you then assemble together. And once you get the main shape done, the reinforcement tubes are very easy to install in the correct position.



About the very first price. Initially, it was set at an unusual low numbers (compared to other chassis plans with similar complexity/quality/content on the market who sell for over 1K), in order to allow some minor money flow while I'm progressing. I don't have full time job to make money for living. As I progressed over the time, I upped the price every few months. Thanks to the first customers I was able to keep working on the chassis plans. Considering the trust and patience these kind men showed, with no doubt they fully deserve to own the plans for the low price they pre-ordered, even though that I added many extra features to the chassis. Out of regard for their help, they will receive a free set of my body plug plans, as well as 3d CAD files for the door hinges and glasses.



The failure of my hard drive is just one of the reasons for my delay. There are several other, more serious factor that took me over half year of working, with almost no income meantime (except several customers who pre-ordered my plans at the very low introducing price). I also took periodically some short part-time jobs to cover my most urgent living expenes. Two customers were not happy with the delay and claimed for refund of their money, and I had to find some quick job to make these money. I saw my girlfriend only 7 or 8 times for over half year, so this is yet another good meazure showing for how much this project reflected my life. I would never do that project again if I was able to return the time back. Fortunatelly, I'm close to finishing and I can't wait to make it happen as fast as possible, so I can get some new, better paid project. This adventure was not good for me. I wanted to help builders do their Aventador projects at low budget (considering there are some very expensive chassis plans sold over the web), but that turned out as a bad idea as I faced too many obstacles during the work period. OK, let's see if I can make a list of factors that caused delays:

1. Originally, I planned to design the chassis in a much simpler way, and while working on it I saw some areas that could be even designed better. I wanted to avoid the typical cheap low-cost kit car chassis design with 20 straight tubes and no reinforcements that's too dangerous to drive. I also received many requests to not make the front end bolt-on removable, because this is only necessary in case of accident, and that most people probably will never face things like this. So, I did some extensive changes in the front end of the chassis, and this forced me to make this portion from scratch.

2. Then, I decided to focus on big safety and do this my top priority, even if that would add some more weight to the chassis. After all, 0.1-0.3 seconds slower car is not that big "sacrifice" considering the added safety.

3. Meantime I also worked on the Aventador 3d exterior, in order to introduce body plug plans that will fit my chassis. I made countless of improvements of the model, "fighting" with the mistakes it had and the inaccuracies I found when compared it with hi-res photos of the genuine car. I basically created 90% new 3d model, leaving too few areas of the original game model.

4. I finished about 30% of the plans when I figured out I could do them much cleaner and easy to read by non-engineers, and add some useful information like where each tube is located on the chassis. I also renamed the tubes with added a letter in front of the number, so that it's easy to predict where the tube comes from. And this would prevent to have too long numbers like 379 etc. Then I sent some of the plans to my customer who printed them out and some lines were not visible as the renderings I make for each tube plans with dimensions will never make the thin lines in perfect black colour (they were mid grey instead), and there is no option to make them thicker than 1 pixel (another reason for the poor printing quality). So, on all plans I additionally redraw the thin dimension lines in a paint program to make them printer-friendly.

5. I completed about half of the plans this way, when on 12th April I heard and saw a big electric flash at the back of my PC. This didn't seemed optimistic. I was unable to start my PC, so then I used my other PC and connected another hard drive and tried to run other OS from there, with my primary hard drive connected as slave drive. But this caused short cirquit that damaged my other OS as well. My damaged hard drive managed to damage my other working PC. I visited several PC cervices where the guys tried everything to resque my data from the hard drives, but they were able to do so only with the primary hard drive that had data prior 2010. All my files since then were saved on my newer hard drive that had hardware failure. They changed the cirquit board, but still nothing, just very fast spinning of the dics and fast raise of the temperature. I was luck that I found an earlier back-up copy of the Aventador chassis from January, and I still remmebered the changes I did on the chassis recently, so I redid these tubes and stated with making the plans from scratch. At least, I had 90% of the chassis. Probably I have never been more happy in my entire life, because this back-up copy saved me several months of work. I bought 2 new hard drives and made back-up copies of my data to 3 different places, plus my laptop which I currently use as working machine. I can not allow another loss of data and working again and again and again...

6. At some point I added some new features to the package, such like drawings to cut wooden patterns for properly positioning of the roof tubes, CAD drawings to lazer cut sheet metal patterns for cutting the complex tube ends of the roof tubes, and some other "small" things that add lots of spent working time, when combined together. I simply wanted to offer the easiest to build and understand set of proper Lambo chassis plans on the market, while not making any shortcuts in the safety department.

7. Over the time I was surpriced that 2/3 of the requests for chassis plans were from people who use centimeters rather than inches, hence they said they are unable to find tubes in inches in their area (or it's too expensive to make a custom order with import). So, I decided to make EU version of my chassis with tubes entirely in centimeters using the Metric system. Basically, this almost doubled my work, hence the time it requires to finish it off.

8. Yesterday I just wanted to check how the power window will go inside the door panel, and I was not happy to see that the 3d game model was so wrong that the glass collided with the door skin. So, this night I worked about 15 hours to figure out the best possible bend radius of the side glasses, that's both, visually correct to the genuine car (of course, no way to be 100% accurate as I work with photos as references) and suit the need to pull down the power window inside the door panel with at least 20 mm free room in between. Assuming that the fibreglass could be up to 7 mm thick, I targeted at 30+ mm distance between the door skin and the power window. I achieved 32 mm and this is about 25 mm free room, which is not bad at all. The power window of the 3d game model collided with the middle of the door skin, in a very similar way like the power window of Countach. I just uploaded a video on my YouTube channel (seen in the update above) that shows the new shape of the side glass I created.

In short, this is it. Smile



UPDATE 3:

Here is the new roof pillar tube which I made recently. It follows the changes on the A-pillar of the body and improves the visibility by up to 27 mm around the middle of the A-pillar. This lead to some changes on the chassis underneath, such like different location and/or shape of 4 tubes and 6 mounting plates.

http://www.youtube.com/watch?v=kNN4YThsm-o#ws
 
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BOBIDESIGNOffline
Post subject:   PostPosted: Aug 31, 2013 - 01:47 AM
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UPDATE 4:

All round roof tubes are completelly redesigned now, plus another 12 square and rectangular chassis tubes and 6 metal plates that connect to the roof tubes. The drawings for the roof tubes are completed and currently I make the paper patterns that will be used as guides for cutting the ends of all round tubes. AutoCAD 2d DWG files will be provided to print them out on paper. I also redesigned most of the large wooden patterns that will guide you to place the roof tubes at their exact position in the 3d space. They have been just tested in real life and work perfectly accurate, as seen in the attached photo and in the following build thread http://www.madmechanics.com/forum/build-diaries/17361-aventador-chassis-14.html. There will be a nice set ot drawings sent to existing customers in the following days.

http://imageshack.us/a/img835/6246/58j9.jpg
http://imageshack.us/a/img689/9717/8t46.png
http://imageshack.us/a/img821/9524/pomq.png
http://imageshack.us/a/img801/5063/p3pg.png
http://imageshack.us/a/img138/282/1akb.png
http://imageshack.us/a/img841/9807/rs4s.png
 
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BOBIDESIGNOffline
Post subject:   PostPosted: Sep 17, 2013 - 09:04 PM
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UPDATE 5:

I improved the way the main roof pillars mount to the chassis, in order to allow 14 mm more free room for the door's window sealing next to the triangle window. The OEM Aventador sealing is too thin and considering that most builders will have to use donor car sealing which is usually thicker, having more free room in this area is crucial. Now 4 of the mounting plates that connect the roof to the main chassis are different, as well as 4 of the chassis tubes. Roof tubes are unchanged and remain in the same position.

I finished with designing all the roof wooden patterns and made the DWG drawings for them. Currently updating the plans for the modified chassis tubes and will send them in next days to existing customers.

Also, one of my customers is selling his partially finished Aventador chassis at MM. The remaining drawings that are due to finishing I will send to the eventual new owner. You can read the original post here: http://www.madmechanics.com/forum/mall/18012-aventador-chassis.html#post195109
 
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BOBIDESIGNOffline
Post subject:   PostPosted: Mar 10, 2014 - 11:50 PM
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I almost finished with synchronization between the EU and US versions of my chassis design (the EU one had many improvements, now both are identical), so I will keep making tube- and assembly drawings from tomorrow. Smile I also figured out the correct pivot angle of the door hinges and their proper size so that the doors will not hit the front fenders even if opened up to 95 degrees. Normally, they should be opened by just 70-75 degrees. The required installation drawings and CAD files for laser cut /or CNC-milling/ of the fully adjustable door hinge and mounting points will be included within my chassis plans package.

Video:
http://youtu.be/YDiCZ0l3dAc

EDIT: I improved the angle and clearance so that the door could be opened up to 107 degrees before it reaches the front fender.
 
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BOBIDESIGNOffline
Post subject:   PostPosted: Apr 12, 2014 - 04:12 AM
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Good news, folks. I did some improvements at the rear end of the chassis and designed all mounting plates for the bolt-on removable engine cradle. This week-end is coming a major update with more than 50% of the drawings completed and ready to be printed and used in your builds. Smile
 
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Post subject:   PostPosted: Apr 16, 2014 - 01:34 PM
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Due to some sudden circumstances, I will need couple extra days to write some texts in English for web publications plus letters to a local prosecutor's office (regarding my recent job at "Sin cars" GmbH, Ruse, Bulgaria), before I'm able to finish and send the update files I promised the other day. I would like to apologize for the delay, and reassure all the people who sent me deposits that I will make up for the delay with some useful additionas to the chassis plans.
 
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BOBIDESIGNOffline
Post subject:   PostPosted: May 07, 2014 - 03:50 AM
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Update:

I almost finished the door hinge's new design, plus started with the adjustable mounting points for the sideskirts.

https://www.facebook.com/photo.php?v=1459683650935244&l=8649246787941816071

https://www.facebook.com/media/set/?set=a.1459684990935110.1073741840.100006808682631&type=3
 
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BOBIDESIGNOffline
Post subject:   PostPosted: May 29, 2014 - 05:07 PM
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Update: Sending next wave of chassis plans tomorrow. Smile
 
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Post subject:   PostPosted: Jun 30, 2014 - 04:43 PM
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New update, with the following key features:

1. The engine cradle is different now, 300 mm narrower at the back end compared to previous version. I will have to redo most of the engine cradle drawings. As a result of that modification, rear lower A-arms are inequal length - their back side is 150 mm longer than the front side. This will provide a better suspension travel in the case of high-speed cornering, while maintaining the same strength of the A-arm during acceleration. Weight is reduced by about 1.4 kg as well.

2. I already finished with testing and figuring out the best performing suspension geometry for the front wheels. I started with the 3d modeling of it, using real parts as reference 3d models (Corvette C5 hub-bearing, QA1 coil-over, QA1 X-series 5/8 rod end, Master-sport lower ball joint, custom made wheel hubs). Eventually, I may also design an alternative lover A-arms, front and rear, that use some different lower ball joint that's largely available in the US. At this point I don't own such part to take exact measurements of it, so I can't turn it into a 3d reference model.

3. As I use more aggressive camber angle for the steering pivot, I decided to use two-link upper A-arm instead of regular single upper A-arm. This will allow to manipulate both, the camber angle and the castor angle, while taking a turn. During a high-speed cornering, the outer wheel's camber angle will be double that of a usual sports car, in order to keep maximum area of contact patch of the tyre on the road surface, as well as to reduce heat and friction in the wheel bearing. Although it may sound strange, in some cases the inner wheel's castor angle will become negative, thus reducing the body roll and the aforementioned aggressive camber angle when it's not necessary (inner tyre will take less than 10-20% of forces as the majority of weight is being shifted to the outer tyre, so there is no reason for the former to be inclined). All of these advantages are not possible with regular double A-arm design.

In the following days I will send updated drawings with the included changes I made recently, plus new drawings for the rear bumper, suspension A-arms and wheel hubs.

http://i.imgur.com/QBaZ9YI.png
http://i.imgur.com/Fl93Jk2.png
http://i.imgur.com/va6nz3R.png
http://i.imgur.com/OxXykFm.png
http://i.imgur.com/OYl2MT2.png
http://i.imgur.com/e288Xhd.png
http://i.imgur.com/ycXP15G.png
http://i.imgur.com/m9PuOUD.png
 
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BOBIDESIGNOffline
Post subject:   PostPosted: Jul 23, 2014 - 07:18 PM
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Update:

1. My chassis is now officially called "Govedo chassis". The word "govedo" means "bull" in Bulgarian language, so this pretty much sums it up.

2. I'm almost ready with the front suspension design and this will allow me to continue with the creation of tube chassis drawings. I had to temporarily pause the creation of drawings, as on theory there was a risk of potential collision between the front wheel and the chassis. My recent 3d suspension simulations proved to work just fine with the current chassis design. Because my chassis allows for about 82 mm wider feet space next to the front wheel than NAERC chassis (418 mm versus 336 mm, respectivelly), it was mandatory to ensure that there will be enough free space between the front wheel and the chassis while the former is being turned up to 37 degrees, in order to match the turning radius of the genuine Aventador.

http://i.imgur.com/9iVSazn.png
http://i.imgur.com/2RfiL0e.png
http://i.imgur.com/tfDKgoc.png
http://i.imgur.com/SpHAuiF.png
http://i.imgur.com/dHKwBDl.png
http://i.imgur.com/hpETz7Z.png

3. I also did some calculations of material volume used in a slightly modified 3d NAERC chassis (free download here: ), and it turns out that it has very similar numbers almost matching my own Govedo chassis, despite the more massive look and higher strength of the latter. However, both, the NAERC chassis and Govedo chassis are lacking some sheet metal, so the final numbers will vary a bit. I post some sample comparison below.

NAERC chassis floor, both sides (6.35 mm / 0.25" thick sheet only): Volume = 10,669.0036 (+/- 1e-05) cubic centimeters
Govedo chassis floor, both sides (4 mm thick sheet over reinforcement tubes): Volume = 9,279.2628 (+/- 0.00053) cubic centimeters

NAERC chassis with firewall and floor sheets, no roll-cage: Volume = 41,889.2824 (+/- 0.0018) cubic centimeters
Govedo chassis with firewall and floor sheets, full roll-cage: Volume = 41,772.2091 (+/- 0.016) cubic centimeters



4. Here is the 10-clause policy for using my Govedo chassis plans (the buyer of these is referred as to "builder", and a single full set of my custom chassis drawings is referred as to "chassis plans" for short):

1) Upon buying the Govedo chassis plans, the builder agrees to all the conditions below;

2) The chassis plans set contains a full number of drawings allowing to build an entire custom designed chassis and suspension called "Govedo chassis";

3) The Govedo chassis should fit to any properly built Lamborghini Aventador body kit, as well as to the Finnluxury Tritium kit (aka FLT). You can also develop a custom body kit for the chassis. Worth mentioning is that the FLT kit uses additional custom designed adjustable mounting points to accuratelly fit the body panels in their exact position. These mounting points are not supplied with the chassis plans since they are aimed for use specifically with that particular kit.

4) The chassis plans is a single license and can be used to build one chassis only, be it for personal use or commercial purposes. A single license can not be used to build two chassis or any greater number;

5) A builder who previously purchased the chassis plans can additionally build a second chassis (or any greater number of chassis) by purchasing a new set of chassis plans/license worth 75% of the price (i.e. 75% of 500 USD or 380 EUR = 375 USD or 285 EUR); Builders who would like to mass-produce my Govedo chassis at numbers greater than 5 (five), should order at least 5 licenses at a time worth 50% of the price (i.e. 5x 75% of 500 USD or 380 EUR = 5x 250 USD or 190 EUR = 1250 USD or 950 EUR);

6) Since there is a risk of an illegal piracy of my chassis plans, which is a non-controllable process and heavily based on consensual obligation and trust, it's assumed that the builder is conscientious, understands the clauses in this policy, and shall respect the vast amount of CAD work done by me and the time spent during that process. The builder is personally responsible to not share, re-sell, give as a gift, scan, upload, modify, reproduce in 3d and share, or any other type of unfavourable action that violates the trust granted via the purchase of the Govedo chassis plans. If you do not understand the clauses or will not respect my work, please, do not order the Govedo chassis plans;

7) The builder can freely modify his/her chassis built after my chassis plans, if he/she considers the need to do so. However, this does not allow him/her to use the modified design based on my chassis plans for commercial or non-commercial purposes for another chassis, i.e. a partially modified chassis design of my chassis plans used to build a second chassis (or any greater number) will violate clauses #5 and #6;

8 ) The Govedo chassis is primarily designed for personal usage by the builder in the form of chassis drawings, build diagrams and text instructions, thus the final build quality, symmetry and safety of the home built chassis heavily depends on the work done by the builder, as well as the custom and/or donor car parts used in the built. I put my whole expertise and effort into designing this chassis, and I can say for sure that it features above the average safety/strength level usually seen in the component- and kit car field. However, any mechanical issues, cracks in the welds or tubes, rust, improper cuts and assembly, improper size and/or type of tubes, potential injures or any other accidents caused while driving a car based on the Govedo chassis are by no means related to me. The full responsibility on how my chassis plans set is being used to materialize the actual chassis lies on the builder. If you are unsure whether you have the skills, knowledge and equipment to handle the work necessary to build the chassis and suspension, please, do not start this build at all, or try to find a reputable builder to properly do the job for you. If you are going to often drive the car with speeds above average (like on highway or track racing), it's highly recommended to use additional safety features, such like: racing roll-cage, stronger brakes, suspension parts, 4-point racing seat belts, etc.;

9) You can contact me personally for any additional information and help during your build of the Govedo chassis. It's my duty and pleasure to try to respond as fast as I can whenever I'm at home.

10) If you enjoy your build and eventual ride with the car based on the Govedo chassis, please, share your thoughts and feelings.
 
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BOBIDESIGNOffline
Post subject:   PostPosted: Aug 04, 2014 - 01:20 PM
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UPDATE:

After all adjustments I made recently on the 3d chassis design, I'm now working again on creation the tube drawings. The final version of my Govedo chassis plans is expected to be ready after about one month from now on. There are people who are waiting since long time ago to start their chassis builds and I would like to say thank you for your kindness and patience. It's so close now! I will do my best to fit inside this time frame and start printing the plans sets and then send them via post in an envelope. Normally, one set of printed chassis plans will cost 500 USD or 380 EUR. However, until then I pre-sell the plans for a discount price of 450 USD or 340 EUR. Shipping is included in the price.

There are still people asking me if the chassis plans cost 75 USD as the topic's name suggest, but this no longer applies in this case, as that lowered price was only an initial offer I made based on a much simpler chassis design that was supposed to take me a lot less time. The chassis now has more than double number of tubes than the amount originally planned and it comes with door hinge design, as well. I can't change the topic name to have the appropriate amount. I rely on the belief that there must be a total transparency in doing business, thus I purposely leaved intact my original posts in this thread as a back-up for free reading, even though the chassis was significantly changed/improved over the time and pricing has slowly increasing as I was progressing. It should be mentioned that those who pre-ordered at the initial lowered price for the simpler chassis will receive the exact same full packages and customer support like the newer customers, as a regard for the support I needed initially upon starting this project.


Below is a quick comparison between the Govedo chassis and the NAERC chassis. I measured the difference they both have around the firewall. On my chassis, the firewall has about 100 mm more room in front of the engine at the engine's upper level (meaning my firewall is moved closer towards the seats), and the lower half of my firewall is located another 40 mm more forward (for a total of 140 mm more room than NAERC's firewall). I marked the back side of both firewalls with yellow lines.

http://i.imgur.com/wN7ZKyG.png

http://i.imgur.com/JRnaXtw.png

http://i.imgur.com/OcEXrpX.png




Each Govedo chassis and suspension set/license will be shipped in an envelope with paper plans and CD, which consist the following:

- AutoCAD files with 2d drawing of each individual sheet metal piece and metal plate saved separately and ready for laser cutting.

- Printed A4 paper plans for each individual tube and sheet metal piece, complete with dimensions and part number for easier locating in the chassis. Along with the full measurements, unrolled tube end templates will be available for the few tubes that require complex end notching. This way, you could use these templates and hand plasma cutter or even angle grinder, just in case you don't have a tube notcher.

- Lots of JPG or PNG picture drawings of all tubes assembled together, complete with measurements and guide instructions. Basically, these are full views and close-up views of the chassis (or portion of the chassis) from various angles where the individual numbers of each tube is placed to allow proper understanding of the whole assembly.

- 10 views of the chassis placed in a semi-transparent body of the Aventador.

- Drawings of bent round tubes for the roof roll-cage. Keep in mind that these are designed around the 3d model of Aventator which I use as a reference for the chassis design. If you have a kit with too inaccurate proportions/size, then it's possible to require slightly differently shaped tubes on the roof.

- Suspension drawings with custom designed A-arms and front/rear wheel hubs (aka knuckles). The suspension is designed to utilize Corvette C5 hub-bearings, QA1 rod ends, and QA1 coil-overs. Please, let me know in advance what is the wheel offset and width of your rims, so that I can apply changes to the A-arms and chassis according to your measurements.

- Door hinge design, includes AutoCAD drawings and a 3d solid model.

- Various videos of the 3d chassis.
 
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BOBIDESIGNOffline
Post subject:   PostPosted: Aug 10, 2014 - 01:12 AM
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UPDATE:

In next days I will start delivery of the tube plans. I try to make US and EU plans simultaneously, and more detailed, so it's a bit slow. By the way, these are totally new plans, with better anti-aliasing and thicker line types to allow easier to read printing, as well as some new additional information added, such like: wall thickness (I now use .083" for the US version, and 2 mm for the EU version), mentioning the location of each tube on the chassis, accompanied with a tiny diagram on the upper right corner for quick reference. I post an example here.

http://i.imgur.com/Iixpsog.png
 
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SANTOOffline
Post subject:   PostPosted: Sep 22, 2014 - 02:00 PM
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CIAO RAGAZZI HO BISOGNO DI CONTATTARE CHI HA I DISEGNI IN AUTOCAD TELAIO LAMBORGHINI AVENTADOR , SAPERE CHI CONTATTARE , DEVO COSTRUIRNE UNO LA MIA EMAIL E' virtualcarr@gmail.com
e quello della gallardo attendo notizie sulla mia email grazie grazie
 
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Post subject:   PostPosted: Sep 28, 2014 - 11:50 AM
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Italiano:
Ciao, puoi ordinare i miei disegni per il telaio (stampa formato A4), se vuoi costruire caplica Lamborghini Aventador. I disegni costano 450 US Dollari o 340 Euro. Da questi disegni su carta è possibile creare facilmente il proprio modello tridimensionale in AutoCAD, solo per uso personale (senza nessun diritto di regalare o vendere ad un'altra persona). Spero di poterti aiutare. Saluti!


English:
Hi, if you want to build a replica of Lamborghini Aventador, you could order my chassis plans (in print format A4). My plans cost 450 US Dollars or 340 Euros. From these printed plans you can create three-dimensional drawings in AutoCAD, for personal use only (meaning you agree to not give as a gift or re-sell to anybody else). Hopefully this helps. Greetings!
 
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Post subject:   PostPosted: Nov 02, 2014 - 09:33 AM
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UPDATE:

- The chassis now features dozen newly added reinforcements in key areas, mainly to help the passive frontal crash protection, especially important in the case of an overlap crash when the car's front is being hit only at one side. Those with previously started chassis builds will not need to modify any tubes already welded, because the main chassis design remains the same. The new reinforcement tubes and laser cut plates are additions, hence they will be welded to the existing structure subsequently.

- Reposition of the front lower control arm mounting plates, for easier access to the bolts.

- New way for attaching the engine cradle to the chassis, now fully eliminating any loose movement of the mounting bolts.

- New set of plans will be sent today to customers, with much more to come in next days.
 
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