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Composite wheels (Carbon fiber)
http://gemellocattivo.com/forum/viewtopic.php?f=7&t=329		 Page 1 of 6
Author:  Brian A [ Sat Feb 02, 2019 2:02 pm ]
Post subject:  Welding wheels
mk e wrote:
Can you check the front and then measure pretty much everything else, like the how thick the spokes are and the size of the ribs on them?
Attached are measurements of "everything" (ha!). Note that many of the surfaces are tapered or have curvature so there is some inaccuracy to some of the numbers. Also note that outer tips of the "throwing star" part of the rim flares considerably on the inside as it joins to the outer rim. Measurements are plus/minus; I just measured from my front wheel while mounted on the car. Again; this is measured off of a 16" 1983 factory 308 GTS QV front rim.

Let me know if you need anything else.

Attachments:
308 Front Wheel in Profile s.jpg
308 Front Wheel in Profile s.jpg [ 1 MiB | Viewed 49913 times ]
308 Front Wheel Depths.jpg
308 Front Wheel Depths.jpg [ 1.27 MiB | Viewed 49913 times ]
Author:  mk e [ Sat Feb 02, 2019 10:24 pm ]
Post subject:  Re: Welding wheels
Brian, can you give me a few nice pics of your wheels? Up close straight on and maybe a slight angle? It would be a big help in getting to look right.

I'm kind of on the modular thing now.....but some pics would help
Author:  Brian A [ Sat Feb 02, 2019 11:25 pm ]
Post subject:  Re: Welding wheels
mk e wrote:
Brian, can you give me a few nice pics of your wheels? Up close straight on and maybe a slight angle? It would be a big help in getting to look right.

I'm kind of on the modular thing now.....but some pics would help
Jeez. Pretty soon you'll owe me a beer. (… glad to help!)

Attachments:
1983 Ferrari 308 GTS QV front wheel viewed from a slight angle.JPG
1983 Ferrari 308 GTS QV front wheel viewed from a slight angle.JPG [ 766.86 KiB | Viewed 49968 times ]
1983 Ferrari 308 GTS QV front wheel viewed from straight on.JPG
1983 Ferrari 308 GTS QV front wheel viewed from straight on.JPG [ 760.35 KiB | Viewed 49968 times ]
Author:  Brian A [ Sat Feb 02, 2019 11:33 pm ]
Post subject:  Re: Welding wheels
… and here is the rear wheel.

Attachments:
1983 Ferrari 308 GTS QV rear wheel viewed from a slight angle.JPG
1983 Ferrari 308 GTS QV rear wheel viewed from a slight angle.JPG [ 831.65 KiB | Viewed 49973 times ]
Author:  mk e [ Sun Feb 03, 2019 8:02 am ]
Post subject:  Re: Welding wheels
Thanks again and yes there is always a beer here with your name on it.

They really do look like the hidden bolt 3pcs. where the center meets the rim....I'm sure that's on purpose. I'll CAD up a 3pcs design and see how it looks and go from there. I also need to get the tires off at least 1 set of the 550 wheels and get them sold so I know what my budget is.
Author:  mk e [ Mon Feb 11, 2019 9:17 pm ]
Post subject:  Re: Welding wheels
I gotta wonder why I'm not just making the wheels from carbon fiber?
Author:  Brian A [ Thu Feb 14, 2019 1:27 am ]
Post subject:  Re: Welding wheels
mk e wrote:
I gotta wonder why I'm not just making the wheels from carbon fiber?
… or just sticking with the 550 wheels until the engine is sorted out.

I saw your latest CAD models on the Grassroots site. Very nice. Look very much like a factory front wheel which what you had asked me for all measurements and photos of. Pretty darned cool.

Note that the factory rear wheel is 1 inch wider than the front (rear 8.00"x16"; front 7.00"x16") (factory tire spec is 205/55R16 front and 225/50R16 rear). The rear wheel has a groove where the front has a ridge. Visually, front and back balance but I thought I'd bring this to your attention in case modeling your wheels after the rear wheel rather than the front is structurally or aesthetically beneficial.

Attachments:
1983 Ferrari 308 8.00x16 inch rear factory wheel inner profile.JPG
1983 Ferrari 308 8.00x16 inch rear factory wheel inner profile.JPG [ 553.73 KiB | Viewed 49961 times ]
Author:  mk e [ Thu Feb 14, 2019 8:41 am ]
Post subject:  Re: Welding wheels
Thanks Brian, looking at the rear wheel is on my today of tomorrow list so perfect.

I was in a hurry yesterday and realized I ran out of time to put the pictures here and was trying to decide if I should start a new thread with a more appropriate title...any didn't mean to put anything there that isn't here :)

The front shows as 16.5lbs currently but there is still some work to do on it...it will probably get lighter. As I said I want to start the rear wheel and then see how the 2 compare and go from there. I'm also thinking a bit about how I'd mold it exactly....I have visions of a foam core int he hub and spokes but I need to think a bit about that.

Attachments:
CF 1 Front.JPG
CF 1 Front.JPG [ 51.79 KiB | Viewed 49941 times ]
CF 1 Rear.JPG
CF 1 Rear.JPG [ 40.74 KiB | Viewed 49941 times ]
CF 1 section.JPG
CF 1 section.JPG [ 42.65 KiB | Viewed 49941 times ]
Author:  mk e [ Thu Feb 14, 2019 4:16 pm ]
Post subject:  Re: Welding wheels
I got the shape a little happier....stating to get stressed stuff lined up better. I thought I was just going to get it looking the way I wanted then create a hollow shell but it's a little to complex for that to work so I think I need to redraw it to be hollow from the start. The way its drawn I just change the width and offset and its a rear....I see 1 error but I'll fix that on the redraw I guess.

The front wheel solid as is is 17.3 lbs. I put it into the printing software which shells (but won't give any output but g-code) and it says 12.2lbs for the shelled part....the final version will be between those numbers.

Attachments:
CF 1 rear section2.JPG
CF 1 rear section2.JPG [ 49.74 KiB | Viewed 49931 times ]
CF 1 section2.JPG
CF 1 section2.JPG [ 45.33 KiB | Viewed 49931 times ]
Author:  mk e [ Fri Feb 15, 2019 4:02 pm ]
Post subject:  Re: Welding wheels
Redrawn....13.9lbs. A few things to fix on the model for the rear but its at 15.4lbs at the moment.

Attachments:
CF 2 Front.JPG
CF 2 Front.JPG [ 79.35 KiB | Viewed 49906 times ]
CF 2 section.JPG
CF 2 section.JPG [ 35.01 KiB | Viewed 49906 times ]
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