"Kevin R. Walsh" wrote:

The problem with rivets (one of them) and the (likely) aluminum part
that he bonded the carbon drive shaft to is galvanic corrosion.  The
Rivets will disappear rather quickly.  It is common practice to
seperate the two with a layer of fiberglass, which I do not see in any
of the pictures.

Kevin Russert Walsh
Sr. Process & Equipment Development Engineer
Inhale Therapeutic Systems

I am sure Charley is aware of that. I could be wrong. The layer
of fiberglass could be hidden under the carbon fiber. A thin layer of
4 oz glass cloth is nearly transparent.  As you are probably 
aware Titanium fasteners are usually used to fasten carbon fiber.

Let me reiterate. It is not the carbon fiber drive shaft that
is the main innovation in this airplane. Metal could have been used
for the drive shaft. It is the overall propulsion and cooling  system
that is extraordinarily well engineered and constructed.

Paul Lamar
 
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