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 Rank: Super-Elite        Groups: Official Builds, Administrators, Moderator, Global Forum Support, Registered Joined: 04/06/2011 Posts: 4,539 Points: 13,777 Location: ipswich
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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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 Rank: Elite   Groups: registriert, Registered Joined: 20/03/2011 Posts: 2,356 Points: 7,122 Location: UK
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Amazing work Roy.. scratch building on another level 😎 Spence
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Rank: Elite Groups: Registered
Joined: 13/02/2011 Posts: 2,236 Points: 6,828 Location: East Sussex
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This will be good Roy, it's already a winner Trev Work in progress: Tombstone (Scratch) - San Francisco 2. -The Mayflower ( scratch by plan).
OcCre- Santa-Maria (Kit).
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Very clever Roy, you’ve definitely perfected this method of scratch building.   Mark
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 Rank: Master  Groups: Registered
Joined: 25/11/2018 Posts: 1,284 Points: 3,878 Location: Southeast UK
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Rank: Super-Elite Groups: Official Builds, Administrators, Moderator, Global Forum Support, Registered Joined: 04/06/2011 Posts: 4,539 Points: 13,777 Location: ipswich
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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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 Rank: Pro Groups: Registered
Joined: 25/02/2017 Posts: 339 Points: 1,016 Location: surrey
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Brilliant work Roy. Your talents are endless. Andy.
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Wow Roy.. fantastic work going on there. The body shell is amazing.
Malc.
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Truly outstanding work Roy, a real masterclass..... Regards Alan
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Rank: Super-Elite Groups: Official Builds, Administrators, Moderator, Global Forum Support, Registered Joined: 04/06/2011 Posts: 4,539 Points: 13,777 Location: ipswich
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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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Rank: Elite Groups: Registered
Joined: 13/02/2011 Posts: 2,236 Points: 6,828 Location: East Sussex
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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. Work in progress: Tombstone (Scratch) - San Francisco 2. -The Mayflower ( scratch by plan).
OcCre- Santa-Maria (Kit).
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Rank: Super-Elite Groups: Official Builds, Administrators, Moderator, Global Forum Support, Registered Joined: 04/06/2011 Posts: 4,539 Points: 13,777 Location: ipswich
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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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Rank: Superelite  Groups: Registered
Joined: 10/05/2010 Posts: 2,608 Points: 7,519 Location: Lincolnshire
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WOW your eye for detail knows no limits, Roy Great so far 
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Detail is incredible Roy, love it..... Regards Alan
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Just catching up on this build Roy, outstanding work and a great tutorial. Mark
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Rank: Super-Elite Groups: Official Builds, Administrators, Moderator, Global Forum Support, Registered Joined: 04/06/2011 Posts: 4,539 Points: 13,777 Location: ipswich
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Once again, many thanks you chaps. The next step involved making up the rear chassis cage and suspension tubes. This was all made using ally tube cut and filed to shape according to Aston Martin drawings, the parts being assembled using Araldite. I also made a start on the fuel tank that goes in the tail of the car. This is where I discovered that my green was wrong and I had to mask the model and repaint it using the correct match of paint that I had custom mixed... roymattblack attached the following image(s):
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Just get better and better with every post... Regards Alan
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Rank: Super-Elite Groups: Official Builds, Administrators, Moderator, Global Forum Support, Registered Joined: 04/06/2011 Posts: 4,539 Points: 13,777 Location: ipswich
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Thanks Alan. I'm chuffed you're watching my waffle... 
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Rank: Super-Elite Groups: Official Builds, Administrators, Moderator, Global Forum Support, Registered Joined: 04/06/2011 Posts: 4,539 Points: 13,777 Location: ipswich
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Just a small update here. The seats in the DBR1 were very individual and quite unique. They were also apparently very hard and not particularly comfortable. I made them from flat plastic sheet layered with thin foam and then covered in fabric I printed myself, to replicate the actual pattern on the seats. I drew the pattern up in Photoshop. The fabric is made for inkjet printing and I think it turned out quite well overall. The white piping on the seats was made using white electrical wire glued in with tiny dots of cyano... roymattblack attached the following image(s):
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