IÂ’ve done a few blueprints before. You can see a few examples here (

http://www.geocities.com/mhtaylor67/cad/index.htm - use the menu on the left). IÂ’ll try and document my technique on the vehicle above. Here's the blueprint I knocked up in a couple of hours:

[attachmentid=501]

HereÂ’s my process for getting started:

Blueprint & Drawing scales

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1. Print out a picture of the aspect of the item you want to model as large as you can whilst maintaining the aspect ratio.

2. Take one item for which you know its real world dimensions Â– as this is just an example letÂ’s assume the height of this vehicle is 7 feet.

3. Measure this on your print out Â– in my case it was 93mm (I measure in metric and draw in imperial Â– this way it is easier to keep the drawing scale and the print out scale separate in my head.)

4. Calculate the scale of your print out Â– 7ft = 93mm therefore 1mm = (7*12)/93 = 0.9 give or take a few decimal places. Therefore, 1mm I measure on my printout will be drawn as 0.9 of an inch on my blueprint.

5. You now apply this calculation to everything you measure. I start with the main dimensions of the item; just like scratch building, outline the major structure first. The first dimension I need is the length of the item (I have the height). I measure the printout item length at 185mm. To apply the ratio I worked out above to this measurement I multiply it by 0.9. According to my calculations this makes the item 166.5 inches long (nearly 14 feet).

6. With these measurements I can start drawing the item in my CAD program.

IÂ’ll try to do some more later if youÂ’re interested - Martin