1/12 Lotus 49 - What solutions have people used for the over-sized DFV?

[cevert]

BTW, každý, kto postavil alebo má záujem o modely 1/12 F1 (dávno pred MFH), by sa mal pozrieť na modely Marka Oakleyho na jeho webových stránkach (http://www.mrof1engineering.co.uk/?page_id=22). Veľmi pôsobivé a mnohé z jeho stavieb sú tie, ktoré by som sám rád urobil, obzvlášť McLaren M19 a Tyrrells 003 a 006!

I recommend extending this link with a twitter image database tyrrell 006/2 Mark Oakley https://twitter.com/mrof1models
(scrolls very deeply!!!!)

[tubegenius]

Damned electric cars.

[CK]

I have the 1/12 Tamiya kit. I bought it as a used kit years ago for about 30 Cdn. Since its dimensions are in question, I check it against this drawing that I believe is from Lotus.

Here are the dimensions that I measured. I round up the measurement to 0.5 mm

A: 1/12 - 220 mm; model - 226 mm
B: 1/12 - 135.5 mm; model - 137 mm
C: 1/12 - 46 mm; model - 50 mm
D: 1/12 - 55.5 mm; model - 54 mm
E: 1/12 - 58 mm; model - 56.5 mm
F: 1/12 - 56.5 mm; model - 59 mm
CAM cover width - 17 mm; Model CAM cover - 22 mm
Left to right CAM cover offset - 1.67 mm; Model - 0 mm
Front tire
diameter - 52 mm; Model - 51 mm
width - 21 mm; Model - 21 mm
tread - 16 mm; Model - 19 mm
Rear tire
diameter - 57 mm; Model - 54.5 mm
width - 31 mm; Model - 31.5 mm
tread - 25.5 mm; Model - 27.5 mm
Rim outer diameter - 35 mm; Model - 33.5 mm

So, the model is not that accurate but not very bad except the engine. The engine makes the wheelbase way too long. The tire tread pattern of the rear tire is not correct for the first win, 1967 Dutch GP.

[Tyrone]

I have the 1/12 Tamiya kit. I bought it as a used kit years ago for about 30 Cdn. Since its dimensions are in question, I check it against this drawing that I believe is from Lotus.
49-factory_24th.gif

Here are the dimensions that I measured. I round up the measurement to 0.5 mm

A: 1/12 - 220 mm; model - 226 mm.......

Rim outer diameter - 35 mm; Model - 33.5 mm

So, the model is not that accurate but not very bad except the engine. The engine makes the wheelbase way too long. The tire tread pattern of the rear tire is not correct for the first win, 1967 Dutch GP.

Thanks for this, brilliant stuff!

IT seems then that the model in general is ever so slightly oversized as well as the propotions being out on the DFV an gearbox. Interesting stuff.

[JamesB]

Wow CK really appreciated. That´s the stuff that makes the difference, thanks for sharing

[Chinamalc]

Well done to Hacksaw and CK for bringing some facts to the discussion.
I was always suspicious of Andy Mathews statement that the body was too wide.

M.

[SBEST]

Ok, so if we replaced the DFV from a Tyrrell 003 we will be closer to the original dimension of the car?

Steve

[Hacksaw]

In response to SBEST's query putting - Ford DFV drawings - into google and clicking the images tab threw up the following links to drawings of the DFV that forum members might find helpful if not giving all the answers:
Length:
https://i.pinimg.com/originals/fd/2e/56 ... fd5cd9.jpg

Length and width of the front “triangle”:
https://www.homemodelenginemachinist.co ... pg.113706/

Length and lots of other dimensions:
https://i.pinimg.com/originals/9d/3c/37 ... e7a40a.jpg

Technical notes on the DFV including a few drawings:
https://www.grandprixengines.co.uk/cosworthstory.pdf

In the main search are of Google I found this technical stuff including overall length and width dimensions (in the sixth paragraph):
http://forix.autosport.com/8w/dfv.html

The only thing missing now is the engine’s height but a bit of reverse scaling using the above links should resolve that.

If memory serves wasn’t there a publication that was advertised on the forum a while back that gave details of the plumbing and wiring of DFV’s and how these changed as the DFV was developed during its competitive years; would there be any useful information in that?

Hacksaw

[flashman]

If memory serves wasn’t there a publication that was advertised on the forum a while back that gave details of the plumbing and wiring of DFV’s and how these changed as the DFV was developed during its competitive years; would there be any useful information in that?

Hacksaw

Yes, Stephen Miller ("smbrm1" on this board) is the creator of those excellent references. I purchased his DFV and Chevrolet V8 profiles. The illustrations are in the form of schematics that are simply gorgeous (my admiration as a former draftsman ).

His site is: https://sites.google.com/site/speeddetails/

They do not provide dimensional info, but as Stephen says on his "Publications" page, they "...are designed to assist modellers in understanding race engine components and systems and how to accomplish more realistic plumbing and wiring". If you are interested in adding this type of detailing beyond what the kits provide, these profiles can be from very helpful to invaluable, depending on the modeler. Considering they are priced at just $1US dollar per page, I personally think they were definitely worth the price for the quality of the info provided.


Cameron