01 - Laying Out The Walls
For this teardrop I used floor underlayment (2.7mm) for the interior skin. For the outside walls I used Lauan (5mm). All of which you can buy from the big box store. It would have been better to use marine grade plywood, but this thing will spend most of it's life indoors. I would consider having at least four sheets of 5mm and 2 sheets of 2.7 on hand before you start cutting these shapes. Two of the sheets will be used for templates. One for the inside and one for the outside. These will be used for cutting supports later.
The shape of teardrop campers tend to tell everyone how much thought you put into design. The front of this shape is 10 degrees leaning out to make sitting up in the camper more comfortable. Having both the front and rear angled out creates a little more length at the height of the top of the mattress. The arch on the backbone is set high enough to fit the air conditioning unit later.
Door placement is important as there is not much room between the door and fender. I purchased the doors off of eBay, but they can be purchased new from Vintage Technologies, Union City, Michigan.
Start with the outside shape and work to get it right. Take your time and allow your self a little wood to sand to the final shape. Focus on smooth sweeping lines. Your effort at this step set you up for nearly every other step that follows. Okay, that may be a little bit of an over statement, but it is really important.