On Saturday, December 26, 2020 at 9:36:17 AM UTC-8, Eric Greenwell wrote:
Dan Marotta wrote on 12/26/2020 8:17 AM:
On 12/25/20 11:53 PM, 2G wrote:
On Thursday, December 24, 2020 at 10:07:36 AM UTC-8, paul.fer....gmail..com wrote:
Been following this thread, as my glider has a TT21, and not sure what else is connected to
it (TN72 GPS?). If I understand correctly, with the TT21 I cannot fly in A, B, and C
airspace, but okay to fly in the rest, correct?

Thanks,
Paul

Not only can't you fly IN those airspaces, you can't fly OVER them either, which may be the
bigger limitation. Going back to Minden from the north the shortest distance may be over the
Reno class C airspace, which only goes up to 8,400 ft. But you will need to be in compliance
with class C airspace to even over-fly this airspace. The non-compliant aircraft will either
have to get a waiver from ATC or fly 20 nm either east or west to avoid it altogether. Never
mind that this might put you into conflict with air traffic flying in and out of Reno.

Tom



But aren't gliders exempt from the ADS-B rules? Or is a non-equipped glider not allowed to fly
over the top of the airspace?

I'm equipped, BTW.
My understanding is gliders can fly over Class C airspace above 10,000' without a transponder,
so you could fly over Reno on the way home to Minden - just don't sink below 10,000'. Of
course, I think it's too risky to fly without transponder in the Minden/Reno area (mode C on my
glider), and if I had a TT21, I put in a TN72 with a TA50 antenna. The next glider will have a
TT22/TN72 combo.
--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1

The governing regulation is 91.225:
https://www.law.cornell.edu/cfr/text/14/91.225
You can overfly class B and C airspace if you are at 10,500 and above (not 10,000) - below that you will need a transponder equipped with ADS-B out. This is further explained in:
http://ourdigitalmags.com/publicatio...er&v er=html5

This is the relevant part of 91.225:

(d) After January 1, 2020, and unless otherwise authorized by ATC, no person may operate an aircraft in the following airspace unless the aircraft has equipment installed that meets the requirements in paragraph (b) of this section:

(1) Class B and Class C airspace areas;

(2) Except as provided for in paragraph (e) of this section, within 30 nautical miles of an airport listed in appendix D, section 1 to this part from the surface upward to 10,000 feet MSL;

(3) Above the ceiling and within the lateral boundaries of a Class B or Class C airspace area designated for an airport upward to 10,000 feet MSL;

(4) Except as provided in paragraph (e) of this section, Class E airspace within the 48 contiguous states and the District of Columbia at and above 10,000 feet MSL, excluding the airspace at and below 2,500 feet above the surface; and

(5) Class E airspace at and above 3,000 feet MSL over the Gulf of Mexico from the coastline of the United States out to 12 nautical miles.

(e) The requirements of paragraph (b) of this section do not apply to any aircraft that was not originally certificated with an electrical system, or that has not subsequently been certified with such a system installed, including balloons and gliders. These aircraft may conduct operations without ADS-B Out in the airspace specified in paragraphs (d)(2) and (d)(4) of this section. Operations authorized by this section must be conducted -

(1) Outside any Class B or Class C airspace area; and

(2) Below the altitude of the ceiling of a Class B or Class C airspace area designated for an airport, or 10,000 feet MSL, whichever is lower.

Tom