LIGIER JS19... 1/12 OSONS!! (let's dare!!!! )

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JamesB
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LIGIER JS19... 1/12 OSONS!! (let's dare!!!! )

Post by JamesB »

Hi mates
I take up this old war cry of fellow french modelers.... OSONS!! (LET´S DARE!!!!) :lol:
I joined the adventure of two f1passion friends, so only once, I'm going to advance them (I hope it's not a problem), and since mine will probably be simpler (less details) I can finish sooner.
When you are asked to make decals, it is difficult to resist the temptation.
It is very curious. I started racing F1 in the fall of 1981. I had read LES GRANDS PRIX II by Gerard Flocon, and I was impressed. My first works were 1-32, with Scalextric wheels. Some were used on the track and after a FW08, I was interested in the JS19, it was so simple and beautiful, after seeing the tech analysis at GPI, I said. Let's go! A little plastic from the lids of washing machine detergent cans (which I found out to be the correct polystyrene) and voila. It must be sleeping inside some lost box.
So, 40 years later, we will do with bigger plastic and 2,666 times larger.
Next, the first drawings ;)

Let's go! 8-)
Not much here, just drawings. But it is a very simple, very linear car. We can go from drawing to plastic, to editing and to the final form very quickly.

Image
A very, very good picture. And we start. You have to scale the size WELL. We can refer to the wheelbase, the rear overhang, the diameter of the rims... the height of the rear spoiler, all well-designed dimensions. We obtain a very coherent correlation in this case, proof that the image is taken from far, far away... so very little distortion.

Image
The general idea of ​​how the main construction will be. As we don't want to do interiors or be able to mold the result, we have a lot of freedom. Priority to ease of construction and robustness.

Image
Very interesting measurements. The bodywork starts at the rules enforced 140cm to go up to the rear 110cm. Almost in a straight line. We will come back to this "almost" later ;)
Also note... front wing measures 130cm. Not the 150 per rules, not the 140 for the body either. front overall width, the 215cm max of the regulations, but rear only 208.
Also some measurements of the nose.
Next time, we'll see plastic!! :mrgreen:
BR mates THX for looking
J
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Re: LIGIER JS19... 1/12 OSONS!! (let's dare!!!! )

Post by BMW »

Oh wow! Vamos! Let noone say you are lacking in ambition!

I love these projects of large plastic pieces, calculations of Pi * random door size, and putty. Lots of putty.

All the best James!
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Re: LIGIER JS19... 1/12 OSONS!! (let's dare!!!! )

Post by JamesB »

:lol: Hahah!! :lol: thanks, bro! :D
Well, indeed the idea on this one is as less putty as possible. The 1/32 I made 4 decades ago had almost none :wink:
Lets see tomorrow...
PS: I am really impatient to do what in naval terms would be "laying the keel" :mrgreen:

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Re: LIGIER JS19... 1/12 OSONS!! (let's dare!!!! )

Post by keithwwalker »

@JamesB
Best of luck. I am not as skilled, so I will be down scaling Sunny78's papercraft design to 1/20, and printing on plastic.
https://twitter.com/i/events/1099332896693731328
Dropbox link here:
https://twitter.com/sunny_781112/status ... 9753714689
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Re: LIGIER JS19... 1/12 OSONS!! (let's dare!!!! )

Post by bossy122 »

I did S27s kit and completely screwed up the long wrap around decals on the first try. My mind reels at the thought of trying it it 12th scale! I wish you all the best.
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Re: LIGIER JS19... 1/12 OSONS!! (let's dare!!!! )

Post by JamesB »

Thx boys! :D let’s see if I pass from theory to facts. Yes I had seen that work with paper, might be inspiring :wink:

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Re: LIGIER JS19... 1/12 OSONS!! (let's dare!!!! )

Post by keithwwalker »

I haven't 'played' with Sunny78's pdfs too much, but his work is free and open source. There is the opportunity that with appropriate software, the graphics can be parsed out into decals - the shapes be used on plastic sheet. Don't be constrained by thinking they are just for use on paper.
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Re: LIGIER JS19... 1/12 OSONS!! (let's dare!!!! )

Post by JamesB »

In the end I always prefer having my own measurements, Nevertheless, the way I make it, it's quite like a paper model.
Well, it took me longer than expected to “start cutting plastic” but once I started I was off with a bang. I admit that what had me thinking for long was this feature of sidepods. You see, down there, a curve, right? It took me long to find that the sidepod has a slightly curved shape, while the skirts are straight. So the side panel protrudes a bit in the middle. All that with a gentle curve. Besides, there’s un undercut (see the shadow) that highlights this since it is a bit higher in the middle also with curved shape. This is easily confirmed in the fully lateral pictures
https://i.postimg.cc/9M6xCbNq/75edbd43f67801d8957119006b4d4e37.jpg

https://i.postimg.cc/Bvv7gXKt/77a526427ce91200545e153ab5932634.jpg

https://i.postimg.cc/667JK1TT/8c1904257c2ff85a25347f1759ca5e26.png

Well it took me long to think what to do, but meanwhile I draught the sidepod pannels
https://i.postimg.cc/L5gVWP96/001.jpg

https://i.postimg.cc/qRzYkzJW/002.jpg
Once I had the left one, I made the right one using the other as a template, but taking care of the different radiator air exit...
https://i.postimg.cc/WbrBFFGv/003.jpg

https://i.postimg.cc/5t9TRsZ4/004.jpg

Then I cut the undercut section, you will see later how I will procede. I had many dubts as I said. As you can see, there's different layers in the real thing. I thought of using layers of 0.5mm plastic, but it's expensive! So I used 1mm plastic and carved the sections where the lower layer shows up. I also dd ot want a build up of layers as the real panel is quite thin and visible from the front.
https://i.postimg.cc/NLhxv0F8/005.jpg

OK, that's the idea: the main part of the pannel will be slightly curved, while the sepparatesection I just cut will be a bit shorter and straight. There will be an inner panel that stretches the main pannel to be curved.https://i.postimg.cc/d1pfDwD3/006.jpg
Once we have glued it carefully so the curvature goes as desired, we let it set.
https://i.postimg.cc/L4rd8BZD/007.jpg

Now I add a thin plastic stripe, paralel to the ground taht will make the assembly stronger... and fill the gap. I let it set overnight. Of course, I forgot to picture both sidepod panels before going on...
https://i.postimg.cc/zGF47s22/008.jpg

Now I used the PC to draw the other parts, you gotta be careful with widths and so...
https://i.postimg.cc/zXSdYnwV/009.jpg
https://i.postimg.cc/Gh1MfMyW/009b.jpg

And I glued one of the sidepod panels...
https://i.postimg.cc/PrGcjXBF/010.jpg

And then the right one.

https://i.postimg.cc/vHWKHRy8/010bb.jpg

Now I cut the rear surface..
https://i.postimg.cc/1XFjq2NH/010a.jpg

And give shape to the raised corners with hot water and a step template
https://i.postimg.cc/mZ1qJz6H/010b.jpg

Now it's time to glue the tabs that will help to bond both parts of the upper surface
https://i.postimg.cc/9QCnDxXd/011.jpg

https://i.postimg.cc/cLh5wQ6V/012.jpg

And same things for the rear sections of side panels
https://i.postimg.cc/MTMsCNtS/013.jpg

There goes the rear tray!
https://i.postimg.cc/h4mypFf8/014.jpg

And the rear wing supports/ side plates...
https://i.postimg.cc/bvFCFpxg/016.jpg

First glued in place....
https://i.postimg.cc/1XDvtFL7/017.jpg

And then the right one.
https://i.postimg.cc/k4YkPWW0/018.jpg

OK, so there it is. I hope the thing about the undercut is visible more or less... :lol:
https://i.postimg.cc/8cq9jDKw/019.jpg

https://i.postimg.cc/7PcpBMH7/020.jpg

https://i.postimg.cc/gkZ11Xj7/021.jpg

Not much of an structure inside, but it's quite robust.
https://i.postimg.cc/HLBNbbvr/022.jpg
Well, it seems I got the measures well :D
https://i.postimg.cc/4xvqNDzb/023.jpg

https://i.postimg.cc/Z5zXmby5/024.jpg

https://i.postimg.cc/ZqTg9wHk/025.jpg

Well, that's all for now, I expect to be soon making a monocoque and lower profiles of sidepods.
Thanks for looking, Best regards!
James
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Re: LIGIER JS19... 1/12 OSONS!! (let's dare!!!! )

Post by Icon_Modeler »

Looking good JB, Keep on going!!!
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Re: LIGIER JS19... 1/12 OSONS!! (let's dare!!!! )

Post by Jeff »

thanks James, nice masterclass in scratchbuilding with plastic card :)
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