Trailer design advice

[akflyer]

That long tongue is going to be very weak. I would run some diagonal braces long the length of the tongue to the tail wheel channel. Also, run a brace from the main frame in front of the trailer wheels to a place about 3' from the hitch on the tongue. This will give you some lateral stability on the trailer. I will get on my other computer and post up some pics of my converted boat trailer.