Re: [Phys-l] Bad physics in National park

[John Denker <jsd@av8n.com>]

On 05/22/2009 07:16 PM, LaMontagne, Bob wrote:

> .... The airfoil is
> symmetric and it has no dihedral - it flies just as well upside down
> as right side up. (Wouldn't do that in my full sized Cessna 150!)


But you could try it in somebody else's Cessna 150. 
   http://www.aft.co.nz/index.aspx?site=239&page=1712

A fully aerobatic 150 is not aerodynamically different from a regular 150.  
Same wing and other externals.  The differences include skylights, fancy 
harnesses, fancy doors, and stronger internal bracing.

Bill Kershner instructed in a 150 Aerobat.

On 05/22/2009 02:02 PM, Richard Tarara wrote in part

> > .... flying 
> > upside down involves different physics than Bernoulli lift.  

Flying upside down in an ordinary aircraft involves exactly the same
physics as flying right-side up.
  http://www.av8n.com/how/htm/airfoils.html#sec-inverted-camber