March 29, 2020


When the design of this chassis is complete, full plans will be published. However, I started this design with a chassis bought on Fleabay. Building an modifying the “Locost” chassis design to work with AE86 Toyota Corolla drivetrain parts. I’m doing my due diligence and have copies of many frames but still unclear on the major difference between a $ frame and the frame on.

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I find the British sense of humor so enjoyable – but what do they think of yanks? To get a taste of classic tubular chassis design, I decided to build a Locost chassis in plastic, using the Ron Champion book. Approximately 10 as of April cars have been completed and passed by their locoost government for use on the road. Instead I decided to build the chassis in 1 to 10 scale.

Chassis rigidity – FEA25 pages. You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts chaszis this forum You cannot post attachments in this forum. Notes regarding Unit of Measure: The rear of the Locost is of course “inspired by” the Lotus 7. The Locost is not to be confused with the similarly named Locust which is also a Lotus Seven inspired car.

Turns out that that the drawings and photos do not agree, and leave you in the dark what is correct. If they are designed badly, they will have a low torsional stiffness, which will make for less than desirable road holding.

Catherham Vs Locost Posted: The FEA is known to show the original Locost’s design to be slightly under engineered. The last part of skinning that I added was the rear bulkhead, despite the rear end still being unfinished.


Building a Sevenesque Roadster – plans

First step was to decide on the mechanical components that I was going to use as they determine a lot of the design criteria.

Tue Jan 06, 3: The Caterham is one of the very few clubman frames that has a creditable FEA analysis performed on it, which resulted in a design that has three different size tubes and 5 different gages.

Most builders will tell you a full frame takes some time, Dave W. I later enlarged the holes in all brackets, to make them look more realistic. Caterham vs Locost Frame Posted: In the end the Locost, the Haynes and the caterham are 3 different looking cars with different specs and a different target market. It is assumed that donor parts cnassis personal choice will dictate the final geometry of the transmission tunnel and suspension. I’ve excluded them from the drawings because each builder tends to customize the transmission tunnel to meet their needs cut-to-fit.

Tube chassis discussion on the MCM forum.

The caterham is smaller and lighter and has evolved since the 60’s and generally has been strengthed over that time. Getting a homebuilt car registered in the Netherlands is very difficult, so I never intended to build one full scale.

In other projects Wikimedia Commons.

Scratchbuilt 1/10 scale Locost chassis

My Locost is very individual and desi gned to suit my needs. Next were the skins, and I started with those at the bottom of the passenger compartment. What is the construction and weight comparison? There are some vendors manufacturing nosecones that are taller than the book design to provide even more height for the engine. Haynes and Tanner’s books, have good pictures of the Locost. Chassis Plans The chassis plans on this site are based on the original Locost design presented in Ron Champion’s book.

The reality was that the process is far from simple and there are many decisions to be made along the way and problems to overcome. The missing triangulating members were simply too difficult to model with the computer. I followed the book’s building sequence to the letter, and at this point of construction I ran into problems. Ron Champion published his book in It seems the dimensions of the rear section are not correct. The De Dion tube setup was used in factory racers and some of the models offered by Caterham.


Unfortunately they have removed their realistically priced Locost chassis plans from sale due to the high cost of public liability and professional indemnity insurance. By using this site, you agree to the Terms of Use and Privacy Policy. The suggested donor car is a Ford Sierra. I’m especially fascinated with three-dimensional truss structures for car chassis design, which so far I haven’t found a real example of.

I built the lower side of the frame on the drawing of page 47, scanned, scaled to 1 to 10, and then printed. From Wikipedia, the free encyclopedia.

Chasss Dec 31, 6: These modifications also increase the stiffness and torsional rigidity of the chassis and have been adopted in Locosts in other countries. The increased length provides an additional two inches for the pedal box and another two inches in the engine chaasis. Replicas and cars based on or related to Lotus Seven. The rear is traditionally live axlebut has many variants including independent rear suspension or De Dion tube.

Designing mid-engine cars using FWD drivetrains, http: In the real world however, the overall effect of this discrepancy is negligible given the accuracy of most shop tools or lack thereof.