Why not just buy the Greenspeed Tandem plans? That way you will
always have a homebase from which to build. I bought the GTR plans
and they are great!

The first design you have listed is going to have very tippy. It's
just too high in the air.

I'v got some links on my blog on homebuilt trike that you may find
interesting:

http://www.biketour.blogspot.com

--- In bentechriders@yahoogroups.com, bikephoto@a... wrote:
>
> Hello folks;
>
> Well I'm a longtime admirer 'newbie'. I'll briefly explain. I used
to take long bike rides around Los Angeles (I mean 8-12 hour rides)
and came upon People Movers when I was 19. From the minute I first
tried an USS recumbent I was hooked. I loved them and begged a test
ride whenever a shop had a recumbent on display.
> Unfortunately the pocketbook has never been large enough for a
$1000+ bike, therefore I've merely salivated over them.
>
> Now however there's a possible solution. I would like to find
someone to build me a tandem trike frame which I can add used
components and build up in quality as the paychecks increase.
> So I've done extensive research, and played around in CAD with a
design that uses existing materials (i.e. rear triangle and bmx forks)
when possible.
>
> The design can be viewed at -- www.yourbodypower.org/mytrike.htm --
>
> If you are in or near Portland, Oregon and have some extra time on
your hands for this job, please let me know. I am willing to be
flexible but I want to be sure the frame is very strong.
>
> Thank you in advance;
> Aaron Tarfman
>
> "It's amazing to me that people can save $7000 by making a simple
lifestyle change."
>
>
> [Non-text portions of this message have been removed]