3D scanned fenders

[tito559]

Gentlemen,

I’ve searched but haven’t found much. Has anyone accurately scanned ORIGINAL front and rear pig cheek fenders? I am attempting to build a buck from a scan and build my own fenders from sheet metal. I have all the necessary equipment and experience for metal shaping past the buck stage.

thanks guys!!

[uai]

As you're referencing ORIGINAL pig cheeks which originals are you looking for?

There were Alpina Pig cheeks, Schnitzer Pig Cheeks, Koepchen Pig cheeks (although they sometimes used Schnitzer), GS had their own Pig cheeks, the Motorsport Abteilung also had different styles for circuit and rallye.

They all look different....

 

Edited July 10, 2021 by uai

[kbmb02]

7 hours ago, uai said:

As you're referencing ORIGINAL pig cheeks which originals are you looking for?

There were Alpina Pig cheeks, Schnitzer Pig Cheeks, Koepchen Pig cheeks (although they sometimes used Schnitzer), GS had their own Pig cheeks, the Motorsport Abteilung also had different styles for circuit and rallye.

They all look different....

 

 

@uai - do you, by chance, have photo samples (cars) of each? I have two race cars in the shop with pig cheeks (and one more coming), each with a different type … I’d like to understand the difference. -KB

[uai]

32 minutes ago, kbmb02 said:

 

@uai - do you, by chance, have photo samples (cars) of each? I have two race cars in the shop with pig cheeks (and one more coming), each with a different type … I’d like to understand the difference. -KB

No not really. Wolle (whs.de) once gave me a 1 1/2 hourly  lecture about the sublte differences of the makes and evolution over time.
The best approach is period photos and magazines. I have most german car magazines from 67-73 (some even from 1954 to 1990) .But I have them in paper (no scans). 
This thread is one of my favourites on this board i think most answers should be within this thread

 

Edited July 10, 2021 by uai

[TobyB]

Quote

 I am attempting to build a buck from a scan and build my own fenders from sheet metal

 

Wow!  That's kind of a cool idea- 3d printed buck (in chunks, stuck together) and then make the panels the

old, manual, craft way.

 

I had ASSumed that the pig jowls were fiberglass, in which case you'd make a negative of the scan, and

work from there.  Which is ALSO kind of a cool idea, but surface finish is gonna be a bear.

 

But use a 3d print as a metalworking buck?  Neat idea! 

On the scale I can print, I think it'd make more sense to make the

buck a composite- use nylon for the tricky compound curves, use hardwood for the simple, longer shapes.

Admittedly, I have a 5 year old printer.

 

Likewise, my scanning experience is that a mesh of something that big isn't dimensionally accurate-

at least, not at the '3/16" panel gap' range.  So you'd certainly want a pair of good standard fenders

to use to bring the scan data into dimensional accuracy.

 

I have long wanted to make my own flares- the SCCA Production rules say that 'the fender aperture

must remain unchanged' and I thought it would be a real exercise to simply move that aperture 6" outboard,

and then connect it back to an original fender outline, with plenty of room for the allowed 10" wide tire.

That's something that your idea would make sooooooo much easier than trying to build one out of parts.

 

hmm.

 

t

 

[tito559]

14 hours ago, uai said:

As you're referencing ORIGINAL pig cheeks which originals are you looking for?

There were Alpina Pig cheeks, Schnitzer Pig Cheeks, Koepchen Pig cheeks (although they sometimes used Schnitzer), GS had their own Pig cheeks, the Motorsport Abteilung also had different styles for circuit and rallye.

They all look different....

 

Yes sorry. Alpina fenders with the cutout in front of the front tire. 

[uai]

9 hours ago, tito559 said:

Yes sorry. Alpina fenders with the cutout in front of the front tire. 

 

 

Neither of those two are alpinas. So you're just looking for any schweinebacke front

[g_force]

21 hours ago, TobyB said:

But use a 3d print as a metalworking buck?  Neat idea! 

On the scale I can print, I think it'd make more sense to make the

buck a composite- use nylon for the tricky compound curves, use hardwood for the simple, longer shapes.

Admittedly, I have a 5 year old printer.

 

A more common method, and more feasible on relatively inexpensive equipment, is to "slice" the 3D model into layers (thickness dependant on the resolution you want in your buck/mold), print the layers on paper, and use the paper as templates for the boards in your buck. If you're using this method for a mold, you use the paper templates to cut out foam sheets, stack and glue the sheets together, sand the interior mold face into a smooth curve, and glass it up.  

[TobyB]

or...  get the giant laser engraver working, and have it cut the foam directly...

 

hmmmm.

 

t

pretty sure it'd be easier to just make the positives out of metal.

But where's the challenge in that???