Monaco 1971 Ickx (Protar) and Andretti (Tamiya)

[Belugawrx]

Great looking dio !!

[GF-F1]

Hello Ron,

Fantastic builds, great to see those 2 kits together with the 12th scale Tamiya figures, I think a lot of us dream to do this.

Bravo

Franck
www.gf-models.eu

[GF-F1]

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[flashman]

Magnificent job, Ron! And the photos you shared are fantastic, especially for any of us contemplating building either of those kits.

And I especially appreciate the info about using the JPS Lotus tires to replace the kit ones. I've long thought to use the Tamiya 312B to do Andretti's South African winner, but the kit tires being so inaccurate for the 1971 tires always kept me from attempting it. Some years ago Icon Automotive Miniatures did make the replacement metal wheels and resin tires needed for Mario's winner (https://www.scalemates.com/brands/icon- ... ures--1887 but I believe no longer in operation although I still see Derek posting on F1M occasionally), but although beautifully done, unfortunately they were way out of my price range. I may possibly have to consider that project again as think I still have the tires from that JPS Lotus kit!

Thanks so much for sharing.
Cameron

[tubegenius]

Yes, the JPS tire revelation is wonderful. I had a Ferrari 312 set on order from Avus3D, but after nearly a year of waiting and poor communication, I fear I'll never see them.

[Ronnux]

Magnificent job, Ron! And the photos you shared are fantastic, especially for any of us contemplating building either of those kits.

And I especially appreciate the info about using the JPS Lotus tires to replace the kit ones. I've long thought to use the Tamiya 312B to do Andretti's South African winner, but the kit tires being so inaccurate for the 1971 tires always kept me from attempting it. Some years ago Icon Automotive Miniatures did make the replacement metal wheels and resin tires needed for Mario's winner (https://www.scalemates.com/brands/icon- ... ures--1887 but I believe no longer in operation although I still see Derek posting on F1M occasionally), but although beautifully done, unfortunately they were way out of my price range. I may possibly have to consider that project again as think I still have the tires from that JPS Lotus kit!

Thanks so much for sharing.
Cameron

Thanks Cameron! I had contact with Derek about those tires a while ago. Unfortunately he doesn’t cast wheels anymore. But when I checked the official Ferrari site and found out that the dimensions of the B2 were a close match to those of the Lotus 72D in 1/12, I thought this could be it! And it worked out pretty nice. I suggest cutting the front rim the way I did (the outer part 4mm). You need to keep the inner part intact because of the space needed for the wheel hub and brakes.

I paid 79€ for two Lotus 72D wheel bags including al the tubes, springs, screws etc. Always nice to have some extra I forgot the Firestone decals, but got them from a German store for 5,99€ a sheet..


Good luck for those who try to do the same!

[Hacksaw]

If I may add to Ronnux’s thread.

The following link gives some information about modifying the wheels and tires the on the Protar 312B2 Ferrari:
viewtopic.php?p=359604&hilit=Hacksaw#p359604
Measurements and pictures are given in the last two posts on the first page.

Wheel and tire sizes did vary from race to race for example this link to Regazzoni winning the 1970 Italian GP in a 312B with noticeably narrow front tires:
https://motorsportmagazine.b-cdn.net/wp ... 0x1067.jpg

https://media.gettyimages.com/id/883919 ... UkB6clywc=

This link shows Ickx at Mexico also with narrow front tires:
https://classiccarcatalogue.com/F/ferra ... mexico.jpg

And for comparison:
https://ferrari-cdn.thron.com/delivery/ ... 97&dpr=263

Some brief notes and pictures on my attempt at the 1972 312B2 can be found via this link:
viewtopic.php?t=9530&hilit=Hacksaw&start=20
The fifth post refers.

Images of other wheel tire conversions are also attached for reference.

1. The technique for altering the width of a wheel and tire is relatively straight forward:
2. Carefully measuring of the donor wheel and tire compared to the required width of the modified wheel and tire is the first step, this gives the measurement of where the cut around the tyre(s) is to be made,
3. Measure and calculate where the inside face of the wheel hub needs to achieve the correct track width,
4. You will need to make a jig to position the cuts in the tires at the right location, you will need to be careful here because if the tire is not fully supported it may deform as you start to make the cut which will result in the cut line wandering about all over the place,
5. The two halves of the tire are held together by short lengths of plastic pipe that I found in the cut-offs box at the local hardware / plumber’s shop,
6. The plastic pipe should be undersized rather than oversized as it is much easier to make the plastic pipe fatter by adding thin strips of plastic card around the perimeter than it is to file down an oversized piece of plastic pipe.
7. One thing to watch out for is that it might not be possible to put the assembled wheel through the internal diameter of the plastic pipe if this is the case the wheel will have to be assembled around the wheel rather than passing the assembled wheel through the center of the tire

Plans for the 312B and 312B2 may be found here:
https://drive.google.com/file/d/1ljg-e5 ... pdqqj/view
And here:
https://drive.google.com/file/d/1Lk3GO7 ... jSMUT/view

There are lots more plans, mostly from the 1950 to early 1970’s, to be found from the pages of “Model Cars” magazine and their “Prototype Parade” series of articles via this link:
http://www.cscra.co.uk/classic-slot-car ... arade.html

Hacksaw