Jim,

The "400 foot limit within 3 miles of an airport" thing is an AMA safety rule; 
it has nothing to do with FAA airspace. So are the "no autonomous flight" and 
"maintain unenhanced visual contact" rules. The AMA rules used to correspond 
exectly to the published FAA guidelines for model aircraft operations. I don't 
know if they still do. 

Most of us that fly anywhere remotely near urban areas fly in controlled 
airspace (see below). The only reason that we are not violating FAA regulations 
is that the FAA HAS NO REGULATIONS regarding operation of model aircraft. The 
FAA doesn't even have a good definition of what a model aircraft is! The FAI 
does. Essentially if your model weighs less than 5 Kg. (FAI limit), then you 
have a pretty good argument for it being a model (unless you use it 
commercially). Depending on who you talk to at the FAA and what you're using 
your model for, they will probably say it's a UAV if you're going to take it 
very high - certainly if you're wanting to venture into class A airspace! 

Because model gliders routinely operate at a thousand feet or higher within 
controlled airspace, I firmly believe that the FAA should take control of model 
aircraft regulations. If nothing else, the FAA should provide guidelines and 
assistance (NOTAMS...) for high altitude model operations around established 
AMA facilities,  XC operations, and record attempts. At the moment, it is 
impossible to work with those guys as they have no established procedures. 
Right now, the AMA has a "head in the sand" attitude and will take no action to 
coordinate with the FAA. 

******************************************
All US airspace is classified as A,B,C,D or E - or uncontrolled.

Class A is above 18K feet in the continental US.
Class B is airspace from the surface to 10,000 feet MSL surrounding the 
nation's busiest airports.
Class C airspace extends from the surface to 4,000 feet above the airport 
elevation (charted in MSL) surrounding those airports that have an operational 
control tower, are serviced by a radar approach control, and that have a 
certain number of IFR operations or passenger enplanements.
Class D airspace extends from the surface to 2,500 feet above the airport 
elevation (charted in MSL) surrounding those airports that have an operational 
control tower.
Generally, if the airspace is not Class A, Class B, Class C, or Class D, and it 
is controlled airspace, it is Class E airspace.
Except for 18,000 feet MSL, Class E airspace has no defined vertical limit but 
rather it extends upward from either the surface or a designated altitude to 
the overlying or adjacent controlled airspace. There are Class E airspace areas 
beginning at either 700 or 1,200 feet AGL used to transition to/from the 
terminal or en route environment.
*******************************************

Mark
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Monday, January 17, 2005 9:20 AM
To: soaring@airage.com
Subject: RE: [RCSE] High Altitude Glider

Jim,

I've seen this site before.  Projects like this are the reason that the
FAA wants to regulate UAVs (and RC aircraft) flying under autopilot or
video downlink.  This case is specifically mentioned when they talk
about having to control any aircraft in "their" airspace.  It doesn't
apply to RC until you get above 400', then you're in their space again.
They also regularly use the example of a full scale helicopter flying
under an RC trainer with a video downlink under it.  The helicopter
never saw the RC plane as it passed ~100' below it.  Unfortunately this
kind of story constantly pops up on the internet giving the feds more
ammunition to make stricter regs with. 

Luckily the FAA isn't that concerned with typical RC flying, only with
vision enhanced systems or autonomous systems.

Happy flying,

Jim
www.jtmodels.com


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