RE: CAD complete on Bentley's Birkin Blower

RE: CAD complete on Bentley's Birkin Blower

Thursday 16th April 2020

CAD complete on Bentley's Birkin Blower

The new Blowers get one step closer to completion, as the digital rendering is finished



Those using their newfound working from home status to binge watch Friends or take Morecambe to glory on Football Manager should look away now: the Bentley boys (and girls) have been busy, despite the obvious obstacles. No longer at their Crewe offices, the Bentley Mulliner Classic Division have nonetheless completed what's been called an "important milestone" for the Blower Continuation Series: the CAD model is ready.

You'll remember the painstakingly in-depth process of constructing a Continuation Series car; detailed last year, it involves a 3D scan of an original Blower - chassis HB 3403 - as well as "a sympathetic and conservative mechanical restoration" when it was being put back together again. Then the digital recreation could happen, then Bentley could maybe consider beginning to build the cars. Using moulds and jigs from the 1920s. Nobody said it would be easy...


However, having the digital copy ready is a big deal. Bentley reckons it's taken 1,200 hours for two CAD engineers to complete from the scan data (so that's not including all the time taken in breaking down, restoring and reassembling the Blower) and is made up of 630 components across 70 assemblies. Just this one digital model is more than 2GB in size - that's the level of detail. It is, unsurprisingly, the first time that a 1920s Bentley has been replicated digitally.

So, what's next? The dozen customers are in the process of choosing their spec, using the CAD model with Bentley Design to create accurate renderings of how the finished car might look. Bentley's Car Zero prototype will also begin the "first stages of build" very soon. Suffice it to say nothing is going to happen too swiftly, given both what's being worked with and Bentley's fastidious attention to detail. Then the Mulliner technicians can begin assembly.

The Blower Continuation Series ought to be an incredible project to watch unfold, the process of resurrecting a hundred-year-old car arguably as captivating as the end product promises to be. Expect another update soon, or rather when progress deems one suitable - this Blower isn't going to be rushed, that's for certain.





 

Author
Discussion

anonymous-user

Original Poster:

56 months

Thursday 16th April 2020
quotequote all
Fantastic. These cars still have immense presence. It's the automotive equivalent of using mammoth DNA ... wish I had the £.

thegreenhell

15,780 posts

221 months

Thursday 16th April 2020
quotequote all
Why are they scanning it if they already have the original tooling and drawings? What does that add to the process?

This image from the article surely can't be the CAD model from their scans? It looks like it was done in Sketchup.


jeremy996

323 posts

228 months

Thursday 16th April 2020
quotequote all
thegreenhell said:
Why are they scanning it if they already have the original tooling and drawings? What does that add to the process?

They don't. The blower was a private venture financed by Dorothy Paget, managed by Sir Henry 'Tim' Birkin with design work by Amherst Villliers and others; Bentley did not really approve at the time.

thegreenhell

15,780 posts

221 months

Thursday 16th April 2020
quotequote all
jeremy996 said:
They don't. The blower was a private venture financed by Dorothy Paget, managed by Sir Henry 'Tim' Birkin with design work by Amherst Villliers and others; Bentley did not really approve at the time.
But it was based on a standard Bentley 4.5 with an added supercharger. 95% standard Bentley. The article states they will be using the original molds and jigs, and there are specialist companies out there converting standard Bentleys into Blower replicas without laser scanning an entire original car.

edpratt

16 posts

145 months

Thursday 16th April 2020
quotequote all
thegreenhell said:
Why are they scanning it if they already have the original tooling and drawings? What does that add to the process?

This image from the article surely can't be the CAD model from their scans? It looks like it was done in Sketchup.

Image looks like a screengrab from CATIA, it's an engineering parametric modeling tool and not generally used for nice looking 3d renders for marketing. The main purpose is to hold model detail so that parts can be assembled in model form, and drawings/machine code can be generated for later manufacture.

thegreenhell

15,780 posts

221 months

Thursday 16th April 2020
quotequote all
edpratt said:
Image looks like a screengrab from CATIA, it's an engineering parametric modeling tool and not generally used for nice looking 3d renders for marketing. The main purpose is to hold model detail so that parts can be assembled in model form, and drawings/machine code can be generated for later manufacture.
Thanks. It's a shame they couldn't use the original parametric CAD models used by the craftsmen who built the originals back in the day.

Equus

16,980 posts

103 months

Thursday 16th April 2020
quotequote all
thegreenhell said:
It looks like it was done in Sketchup.

No, that's not SketchUp - the rendering is different.

williamp

19,310 posts

275 months

Thursday 16th April 2020
quotequote all
Gosh there might be fun ahead if lawyers were to be mischevious...

Bentley only built the engine and chassis. The bodywork were built seperately, to the customers choice. Sometimes, the customers would ask for two bodies for the same chassis: a heavy, closed salokn for winter and an open, touring style for summer. Mulliner,s later Mulliner Park Ward or MPW was bought by Rolls Royce. Mulliners were bought by standard triumph, and Tickford by Aston Martin.

That body they have scanned is, I belivet a design and build of Vanden Plas. Which was bought, eventually by auatin. Which became, BMc, BMH, BLMC, BL, AR, Rover, MG Rover and now, I believe owned by the Chinese.

Might Bentley be facing a patent infringement from Nanjing Automotive forr a 100 year old design feature??

Dr Jekyll

23,820 posts

263 months

Thursday 16th April 2020
quotequote all
jeremy996 said:
They don't. The blower was a private venture financed by Dorothy Paget, managed by Sir Henry 'Tim' Birkin with design work by Amherst Villliers and others; Bentley did not really approve at the time.
Interesting character Amherst Villiers. Designed Campbell's Blue Bird which got the land speed record in 1927, and after WW2 worked on the US space programme. He died in 1991.

iwantcheese5

76 posts

129 months

Thursday 16th April 2020
quotequote all
edpratt said:
thegreenhell said:
Why are they scanning it if they already have the original tooling and drawings? What does that add to the process?

This image from the article surely can't be the CAD model from their scans? It looks like it was done in Sketchup.

Image looks like a screengrab from CATIA, it's an engineering parametric modeling tool and not generally used for nice looking 3d renders for marketing. The main purpose is to hold model detail so that parts can be assembled in model form, and drawings/machine code can be generated for later manufacture.
Definitely Catia V5, I'd recognise that horrible gradient background anywhere. Its incredibly capable software for CAD work but it looks like something from Windows 95. The interface definitely fell into the "if it ain't broke" pile with the developers...

Just switching the background colour and changing to a slightly different rendering mode makes it look miles more up to date however.

Bodo

12,382 posts

268 months

Thursday 16th April 2020
quotequote all
edpratt said:
thegreenhell said:
Why are they scanning it if they already have the original tooling and drawings? What does that add to the process?

This image from the article surely can't be the CAD model from their scans? It looks like it was done in Sketchup.

Image looks like a screengrab from CATIA, it's an engineering parametric modeling tool and not generally used for nice looking 3d renders for marketing. The main purpose is to hold model detail so that parts can be assembled in model form, and drawings/machine code can be generated for later manufacture.
You are right, this is CATIA:



At the moment (and for a long time already), CATIA is the software most modern cars and their components are modeled with.

rev-erend

21,441 posts

286 months

Thursday 16th April 2020
quotequote all
Bodo said:
edpratt said:
thegreenhell said:
Why are they scanning it if they already have the original tooling and drawings? What does that add to the process?

This image from the article surely can't be the CAD model from their scans? It looks like it was done in Sketchup.

Image looks like a screengrab from CATIA, it's an engineering parametric modeling tool and not generally used for nice looking 3d renders for marketing. The main purpose is to hold model detail so that parts can be assembled in model form, and drawings/machine code can be generated for later manufacture.
You are right, this is CATIA:



At the moment (and for a long time already), CATIA is the software most modern cars and their components are modeled with.
Modern hehe

ate one too

2,902 posts

148 months

Thursday 16th April 2020
quotequote all
williamp said:
Gosh there might be fun ahead if lawyers were to be mischevious...

Bentley only built the engine and chassis. The bodywork were built seperately, to the customers choice. Sometimes, the customers would ask for two bodies for the same chassis: a heavy, closed salokn for winter and an open, touring style for summer. Mulliner,s later Mulliner Park Ward or MPW was bought by Rolls Royce. Mulliners were bought by standard triumph, and Tickford by Aston Martin.

That body they have scanned is, I belivet a design and build of Vanden Plas. Which was bought, eventually by auatin. Which became, BMc, BMH, BLMC, BL, AR, Rover, MG Rover and now, I believe owned by the Chinese.

Might Bentley be facing a patent infringement from Nanjing Automotive forr a 100 year old design feature??
Patent ??? I don't think so ... Designs can be registered in the UK but not patented.

ntiz

2,359 posts

138 months

Thursday 16th April 2020
quotequote all
I really don’t understand why Bentley are doing it this way?

You can buy every bit for these cars already. How do you think the originals are still going?

Buy a real 4.5 litre for 500k give it to NDR or VBE for a year, write them a check for say 200k. You will get the same thing except with real history.

Just seems pointless to me.

sidesauce

2,514 posts

220 months

Thursday 16th April 2020
quotequote all
ntiz said:
I really don’t understand why Bentley are doing it this way?

You can buy every bit for these cars already. How do you think the originals are still going?

Buy a real 4.5 litre for 500k give it to NDR or VBE for a year, write them a check for say 200k. You will get the same thing except with real history.

Just seems pointless to me.
Couldn't care less about the history.

ntiz

2,359 posts

138 months

Thursday 16th April 2020
quotequote all
sidesauce said:
ntiz said:
I really don’t understand why Bentley are doing it this way?

You can buy every bit for these cars already. How do you think the originals are still going?

Buy a real 4.5 litre for 500k give it to NDR or VBE for a year, write them a check for say 200k. You will get the same thing except with real history.

Just seems pointless to me.
Couldn't care less about the history.
How about 700k saving on the build and worth 1.5-2 million after??

sidesauce

2,514 posts

220 months

Thursday 16th April 2020
quotequote all
ntiz said:
sidesauce said:
ntiz said:
I really don’t understand why Bentley are doing it this way?

You can buy every bit for these cars already. How do you think the originals are still going?

Buy a real 4.5 litre for 500k give it to NDR or VBE for a year, write them a check for say 200k. You will get the same thing except with real history.

Just seems pointless to me.
Couldn't care less about the history.
How about 700k saving on the build and worth 1.5-2 million after??
At this price point, I'd still prefer the brand new version.

JonnyVTEC

3,015 posts

177 months

Thursday 16th April 2020
quotequote all
thegreenhell said:
Why are they scanning it if they already have the original tooling and drawings? What does that add to the process?

This image from the article surely can't be the CAD model from their scans? It looks like it was done in Sketchup.

Let’s be honest if you don’t recognise that as CATIA v5 you not really in any position to comment on it.

JonnyVTEC

3,015 posts

177 months

Thursday 16th April 2020
quotequote all
thegreenhell said:
Thanks. It's a shame they couldn't use the original parametric CAD models used by the craftsmen who built the originals back in the day.
Is this a wind up?

The original CAD models from 1920 laugh mate Concorde was done on paper.

ntiz

2,359 posts

138 months

Thursday 16th April 2020
quotequote all
sidesauce said:
ntiz said:
sidesauce said:
ntiz said:
I really don’t understand why Bentley are doing it this way?

You can buy every bit for these cars already. How do you think the originals are still going?

Buy a real 4.5 litre for 500k give it to NDR or VBE for a year, write them a check for say 200k. You will get the same thing except with real history.

Just seems pointless to me.
Couldn't care less about the history.
How about 700k saving on the build and worth 1.5-2 million after??
At this price point, I'd still prefer the brand new version.
I’m not trying to argue but why? It is literally a copy of an old car they aren’t improving it so why?