Tag Archives: Martin

The Martin Jetpack and Its Design Tradeoffs

Posted on Wed, 2010-03-10 by gravityloss

[youtube=http://www.youtube.com/watch?v=kLccl_NWDQE] Here’s the technical information. It uses a piston engine to spin two smallish propellers. At first look it seems inefficient: the propellers are so small (diameter 1.7 ft so radius is 0.26 m) so the air mass flow is low … Continue reading →

Posted in airplane, engines, Motivation, Science Links, Transportation | Tagged , , , | Leave a comment

RQ-170 Sentinel A Morph Wing Aircraft?

Posted on Tue, 2009-12-15 by gravityloss

Just a theory of the recently photographed “Beast of Kandahar”. I was browsing the NTRS (for another project), when I ran into this: A hinge, actuators or a locking mechanism could explain the wing humps (if more conventional structures are … Continue reading →

Posted in airplane, industry, Journalism | Tagged , , , , , , | 2 Comments