3DP Group 7 Proxy 2021 Build Thread

[chappyman66]

Post your builds here.....Kevan has already given us a jump start on the initial thread.

Show off the raw prints, the in-process finishing work, paint, and finished work. Chassis as well as bodies.

[Kevan]

Nice one!

...the body is printing...

[chappyman66]

Not sure which one I will use...... working on a Simoniz Lola T163 right now.......

[Rastas]

I've only got one for the list 917, waiting on some other files from Vlad to make my mind up . I did a test print of 917 and chassis , body's a bit too big to fit the chassis so I'll have to do another one to get things to fit properly .

[Kevan]

I've printed the BRM P167 and found some great photos for reference.

By scaling this picture to the same width as my printed bodyshell those are 12mm wide tyres.

[chappyman66]

Beautiful looking print, Kevan!

[Kevan]

Until I draw up a chassis for my preferred sidewinder setup I don't know if 12's will fit, I doubt it, but inline should be possible. 12's will definitely fit in the body though.
Yes it's printed pretty good! I've given the parts a coat of etch primer then a coat of white automotive paint I bought about 10 years ago for a VW camper van I had at the time.

[Barc 1]

Very nice print. I am hoping for some success like that. Looks fabulous

[chappyman66]

Hi Rastas,
That is the wrong body for the CanAm.
This is the early 917-10:

Kind Regards

[Rastas]

Hi Chappy, ok sorry about that! I thought I had seen footage of the 917 K running in the can am sires on UTube. In that case would you be able to share the Nissan R382 with me thanks?
Rastas.

[chappyman66]

The proxy is for Group 7 cars.....mostly CanAm although several cars were built in Japan and other places as well.
The Six Hours at Watkins Glen was followed by the CanAm race, and sometimes Group 4/5 sports cars ran in the CanAm as well, which is why people think of them as CanAm cars.....but they aren't Group 7 cars even if they raced with them. The 917-10 is undeniably derived from the 917, but it and the 917-30 were not legal in the same category as the 917Ks.

And yes.....I will send you the Nissan file. 😉

[Rastas]

Great thanks for that 👍.

[Kevan]

I needed a 3rd hand to hold the body for spraying, this is some expanded plastic foam with a 'V' notch cut out and did the job just fine and took about 15 seconds to make

[chappyman66]

Nice work, Kevan. Foam is cheap and easy.
For what it's worth.....the addition of the printed exhaust/gearbox/suspension detail is the idea for the extra concours points.

[Kevan]

Huge credit to the person who created these 3D files we can print, they did a grand job.

[chappyman66]

That would mostly be Nimrod, he has done fantastic work putting the files together.

[Kevan]

Chassis taking shape...might just squeeze 12mm's on.

[Kevan]

If anyone asks about the pacman shaped thing in front of the guide plate it's a datum block. I use the top surface when necessary and centerline faces to mirror chassis features...I quickly realised I needed a datum. I also draw a wheelbase block to line up the axles.

[Lou E]

To those that have printed the Lola T160, what should the overall dimensions be? I found 1:1 dimensions and divided them by 32 but getting some weird measurements...

[Kevan]

Ultimate car page says the wheelbase is 2,388 mm which would be 74.6mm in 1/32.
Track dimensions given will be to the centres of the tyre contact patch not overall width.
Wheelbase / Track (fr/r) 2,388 mm (94 in) / 1,422 mm (56 in) / 1,295 mm (51 in). Wheels (fr/r) 9 x 15 / 14 x 15.
So my reading of that is width across the front wheels would be 51.6mm and 51.6mm across the rears. Obviously not a huge Can-Am monster like some.

[Rastas]

I came up with length 155.575mm , width 57.15mm , Hight 29.6863mm. for the Lola T160.

[chappyman66]

Rastas,
You are probably pretty close.....these early cars are much smaller than we think. We are used to pretty Fly cars but they kinda big.

[Rastas]

Try downloading this, it's free and will all scale converting you need!

[Rastas]

I also have run the vernier caliper a supposed scale body and got. length 122.6mm, width 56.6mm, Hight 27.7mm. take your pick!LOL.

[alexis in greece]

1st print of he 712 in ABS ,not happy, 2nd print running as i write,chassis wise the DART 612 wb matches,maybe needs to move the guide a little back so half way there

[chappyman66]

Alexis, what layer height are you using?

[Kevan]

Alexis, what do you think of ABS? How does it compare to petg.

[Kevan]

I've not successfully printed a bodyshell on my latest printer, I tried with CF-PETG but the top layers were full of holes and the damned thing kept clogging. A shame really because the finish was superb.
When micro swiss offer a hot end upgrade for the Qidi I'll revisit fdm bodyshells.

[Rastas]

What is petg Kevan? can it be smoothed like abs with the vaper trick? I've found that a worn nozzle will clog up ,put a new one in and everything runs smoothly again . It's worth the effort and money.

[Kevan]

It's PET with Glycol, hence PETG.

It's a hardened nozzle and only had a few hours work, it definitely won't be worn. After sussing PETG I'd say maybe I wasn't giving it enough room to flow, 0.15mm nozzle to bed works, less than that doesn't always work.

[Kevan]

No, you can't vapour smooth petg like abs.