On Apr 5, 11:27*pm, GC wrote:

Quite right, Eric, K21s are heavy. *Unlike prepregs however, they are
also quick, cheap and not technologically challenging to repair. *The
insurance premiums are commensurate with that.

Using the field-optimized technologies I developed and refined for the
HP-24 project, I'm pretty sure I can hit 175 lbs/panel for each of
Aurora's ASK21-sized wings. That's not as light as might be wished
for, but it has good margin for repairability and operationality.

Thanks, Bob K.