User talk:Spacefelix

Interesting:

• NASA Centennial Challenges - Perhaps a good aerospace challenge for a cash prize?
• http://challenge.gov/ - Or a short-term challenge in various fields for a cash prize?

Awesome:

• http://www.youtube.com/watch?v=-NvYbRcZeLo - Aerospike motor by Feltenix

No hard feelings?

   :)

Hfuller (talk) 15:18, 2 February 2015 (CST)