Seen this really neat one wheel teardrop trailer on ebay-
1957 Allstate Teardrop Trailer : eBay Motors (item 290391302092 end time Jan-23-10 20:33:33 PST)
I know this particular trailer is not a perfect boat tail, but notice how close it fits to the tow car.
This got me thinking, one could build a nice boat tailed one wheel trailer, and not worry about the gap needed on a regular trailer
any input?