Thinking about recumbent frame designs for full enclosure

The more I look at the front end I put together for the long john the more I see it as a platform for a recumbent, or at least a semi, in which full enclosure from the elements is possible.

One of the main problems people have with recumbent bikes is that they are too low to the ground to either see or be seen in traffic. Creating a riding position that puts the rider's head at the same height it would be at on a conventional bicycle solves that issue.

Very few velomobiles on the market are not open on the bottom, On 2-wheeled velomobiles, this is so the rider can put their feet down at a stop, and on all velos, for reasons of pedal clearance.

I intend to place the bottom bracket high enough in the frame that the rider's feet do not interfere with the floor of the vehicle. I need about twelve inches down from the center of the bottom bracket, eighteen from the bottom of the seat, and another twenty four to thirty six distance between them.

To solve the issue of remaining upright at low speeds, I'm thinking about a pair of extra wheels which swing down on the sides at the operation of a hand crank inside the cabin, or maybe a simple spring loaded lever mechanism like a center stand.

Twelve or eight inch kids bike wheels should work, I think. They have to be small enough to retract and tuck in somewhere without causing space issues.

For the same reason I'm thinking some heavy gauge flat strap bent into an arch to hold each wheel instead of using a whole fork. It should still end up weighing less than a fork as well.

But this is a project for a different day.

I'm training myself to a new schedule, so as active as my mind is right now I have to turn it off and go to sleep.