On a 4x8 sheet measure from bottom front up 2' and in 2' this is a pivot point for the front profile. Make a 2' compass using a narrow rip of plywood with a nail and a small hole for a pencil point exactly 2' apart. put the nail on the point just developed and starting at the 12 o clock position strike a semi circle arc top to bottom. Tear is now 4' tall.
make a second compass the length of your tear (in this case 8' )
starting at the 12 o clock position exactly 2' in from the top edge strike a long arc I placed a second sheet of plywood butted up to the bottom edge of my side profile and just a little ahead of it. the 2nd pivot point will fall at about the 4 o clock or 5 o clock position so make a long arc from about 3 to 6 o clock
go to the rear bottom corner and strike a second arc .Where these arcs cross is your pivot point take the long compass and place the nail on this new point and strike an arc from tail to the 12 o clock position of the front arc. I like the profile except for the pointy tail so I experimented and used the same 2' compass to bob the tail slightly making sure the arcs blends smoothly. Try it on paper to scale I have had several positive comments on eggbert my 3x3x6 motorcycle teardrop
I keep losing these pics so I am adding them here. 4 1/2 years later