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Scratch built 1/8 scale Aston Martin DBR1 Options
roymattblack
#1 Posted : 09 November 2019 11:15:20

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This is one I built some time ago but I thought some here might be interested to see the 'how' I go about scratch building a large model car.

First off - REFERENCE.
You can never have enough. Luckily nowadays we have Google images but don't be afraid to go to the horses mouth, as they say.
Aston Martin Heritage were very generous with photo's drawings and plans which aided no end in getting the body shape as well as the highly complex space frame tube chassis.

I made the body using the 'egg box' method, filled with expanding foam, smoothing it down and then getting a vac form 'rough' to work with.
That was refined and detailed before filling it with plaster to use as a master to form another shell which was further refined.
As it happened I had to do the process twice as my first attempt had been miscalculated and wasn't 1/8 scale.

Nowadays, I'm inclined to get the shell 3D printed as I did with my Lister Jaguar.

Sadly I don't have pics of the entire process but anyway, off we go...

Roy.
roymattblack attached the following image(s):
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Warthog
#2 Posted : 09 November 2019 11:59:37

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Amazing work Roy.. scratch building on another level 😎

Spence
tf64
#3 Posted : 09 November 2019 17:02:34

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This will be good Roy, it's already a winner

Trev
Building: Artesania Stage-Coach H.M.S.Victory / H.M.S. Victory Cross Section / De-Agostini Spitfire.

Full Kits: San Francisco. De-Ago Bremen. Sovereign of the seas. Artesania Stage-Coach Number 2.

Markwarren
#4 Posted : 10 November 2019 10:28:55

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Very clever Roy, you’ve definitely perfected this method of scratch building. Love Drool Drool

Mark
Kev the Modeller
#5 Posted : 10 November 2019 12:26:15

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Brilliant work as always Roy, a real education in the art of scratchbuilding - well done. Cool ThumpUp

Kev Smile
Per Ardua Ad Astra
roymattblack
#6 Posted : 10 November 2019 13:05:19

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Many thanks for the kind comments, and looking in on my waffle.

While the body parts were being sorted I made a start on the engine, which was based on the Eaglemoss DB5 unit with some alterations and a completely different carb and exhaust setup. I also had to alter it to dry sump.
The distributors were scratch made as the racing engine used two, mounted directly onto the ends of the camshafts. I also had to adapt the head slightly to allow for two plugs per cylinder.

The main engine parts were modified to make them suitable to use as 'masters' for moulding and casting in resin.
The cam covers were totally changed as the EM parts were completely incorrect, even for a DB5.

Once I had made the various moulds I decided to make two whole engines so that one could stand alongside the finished car.
roymattblack attached the following image(s):
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andali15
#7 Posted : 10 November 2019 14:11:22

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Brilliant work Roy. Your talents are endless. Andy.
RM1
#8 Posted : 11 November 2019 09:40:34

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Wow Roy.. fantastic work going on there. The body shell is amazing.
Malc.
Gandale
#9 Posted : 11 November 2019 23:40:24

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Truly outstanding work Roy, a real masterclass.....Drool Drool Love

Regards

Alan
roymattblack
#10 Posted : 12 November 2019 09:15:37

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Many thanks you chaps - much appreciated.

The next task was to make the exhaust manifolds and add the Weber carbs.

The manifolds were made from old guitar cable with the centre core pulled out, and copper wire pushed inside. This allows it to bent and retain the shape.
Lengths were cut to size and shape and glued together with cyano adhesive.
The welds were added using a stained glass window lining pen and then the manifolds were painted satin black.

The carbs were cast in resin (I do these myself) along with the inlet manifold and it was all fitted to the engines. Linkages and fuel lines were then added.

The next stage was to get the body prepped for some paint, which proved to be the wrong colour. The correct Aston Martin colour was later found and mixed for me which meant my initial paint had to all be masked off and repainted.
roymattblack attached the following image(s):
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tf64
#11 Posted : 12 November 2019 10:36:20

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Hi Roy,this is so interesting to see it take shape and how you do it.
very well done a great build.

Regards

Trev.
Building: Artesania Stage-Coach H.M.S.Victory / H.M.S. Victory Cross Section / De-Agostini Spitfire.

Full Kits: San Francisco. De-Ago Bremen. Sovereign of the seas. Artesania Stage-Coach Number 2.

roymattblack
#12 Posted : 14 November 2019 10:55:50

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Many thanks for looking in Trev.

The next task was to make the cockpit tub.
Again, this was roughly made up using wood, thin metal sheet and 'Fimo' clay to make a master that could be vac formed.

A start was made on the interior tube framework using plastic tube of various sizes, and then a battery was cast and the side oil tank made and fitted.
Using lots of reference images, I also added other small gubbins inside the car and some of the oil and electrical lines.

Wood strips were cut and glued in as the foot-boards to replicate the wooden ones in the real car.

The dashboard was also attended to by printing a photo of black crackle paint onto decal paper so that I could get the required finish.
The dash gauges were also printed from photo's of actual Aston DBR1 instruments.
roymattblack attached the following image(s):
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CaptnBirdseye
#13 Posted : 15 November 2019 13:15:25

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Drool WOW your eye for detail knows no limits, Roy
Great so far ThumpUp
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