Forced back to the drawing board!

My efforts to solve the bottom  bracket ht. issue by adding the section of frame from the Mixte frame were a failure. The change introduced way to much flex in the frame and I can't figure a way to fix it.  I'm probably going to find a larger rear suspension frame and use that instead of two frame sections bolted together.  I haven't been able to find a cheap frame of the type that matches the setup from the pivot point and has the bottm bracket in the right place.   

frame picture-assembly details

Taking tonight off!.  I'm wiped out.  The picture is the new rear section of the Tank Trike shown upside down.  I cut the rear off of a Mixte frame and cut the chainstays in front of the kickstand plate.  I also cut the bottom of the seat tube off to make installing this easier.  This will be bolted to the remainder of the existing piece of the kids suspension bike at both kickstand plates.  The lower seat stay bolts to the brake bridge and the seat tube will be through bolted to the original false seat tube of the suspension bike.   more picture to follow during the next 2-3 days, scout's honor !

The Tank Trike grows!

On the most recent test ride, the pedal strike was intolerable.  The bottom bracket is so low the pedals hit the ground.  My overly complex solution was to cut of the back of the kids bike and attach an old Mixte frame rear that can take a 26" wheel.  I also flipped the stem to face toward the driver instead of away, put on a wide set of handlebars off of an old cruiser.  I used the seat tube from the new rear to move the front of the banana seat back.  My goal is to have it all together for the 4th of July!  I'll post sooner this time Trust Me :)