UltraJohn wrote:
Legend Length wrote:

snip

I am unable to find electric versions of those powered harnesses being
sold.

John,

I've never seen an electric harness either. The only power harness I'm
familiar with for use with an HG is the Misquito. There are a few more
options if you want to consider a nano-trike, and even more if you want
to go PG. I'd use the performance of the existing machines as a
baseline for the performance of your design.

A few other things to think about...

What type of HG wing are you trying to power, and what type of harness
are you modifying? Will they accept a power-unit ?

Will your hook-in weight with the proposed power-harness be within the
weight range of your wing? What will the effect of power be on your
control range?

Will the purpose of the power unit be to take off and climb out, or
just as a sustainer between widely spread thermals?

Why electric and not gasoline? Site restrictions? Noise? Objections
from other HG pilots?

Harry "yep, I can fall that far" Frey