On Thursday, November 26, 2015 at 8:49:15 AM UTC-8, wrote:
On Saturday, November 21, 2015 at 9:29:27 PM UTC-5, Tim Taylor wrote:
If you fly with other gliders, especially cross-country FLARM is the way to go.

I have had several alerts at high altitude and high speeds that I would have never seen the other gliders in time without FLARM.

I flew US Nats in 2009, 2010, and 2011. Three mid-airs, one fatal. Since 2012 all nats have had mostly FLARM equipped gliders, no mid-airs. I would not race without FLARM now and all our local group uses FLARM.

TT

I recall a mid air(fatal) at Uvalde, and one at Parowan. Where was the third/
There is an implied cause and effect that is partially true. To get a better sense of this implication, it would be worthwhile to look to the preceding periods of time. Data point- the last fatal mid air before Uvalde was in the mid 80's at Ephata during a 70 glider race that was winner take all for team selection.
Do not misinterpret my comment. I use Flarm, and was a very early adoptor, but get quite tired of the well meaning true zealots over selling to make their case.
UH

Here is the listing of all midairs for 1994-2013. There were 20 reported to FAA, so id doesn't include non-reported - which presumably would be more minor since they would unlikely include an insurance claim. It averages 1 per year. Uvalde had one fatal collision in 2010 and a non-fatal in 2012. There is some coding to show phase of flight and whether it was Glider-Glider, Glider-Towplane or Glider-GA as well as Takeoff, Landing or Mid-flight. Sorry for the poor formatting. A spreadsheet with all glider accidents in the US can be found he

https://docs.google.com/spreadsheets...it?usp=sharing


8/17/2012 Uvalde, TX SCHLEICHER ASG29-15M F-CIFB CEN12LA553A Non-Fatal 0 MIDFLT FLT MID G-G
8/17/2012 Uvalde, TX SCHLEICHER ASG29-15M D-6080 CEN12LA553B Non-Fatal 0 MIDFLT FLT MID G-G
6/7/2012 Sparks, NV SCHEMPP-HIRTH STANDARD CIRRUS N943SB WPR12LA250A Non-Fatal 0 MIDFLT FLT MID G-G
6/7/2012 Sparks, NV CENTRAIR C101A N101LV WPR12LA250B Non-Fatal 0 MIDFLT FLT MID G-G
8/4/2010 Batesville, TX ALEXANDER SCHLEICHER GMBH ASW 27-18 N8829A CEN10LA459B Fatal 1 MIDFLT FLT MID G-G
8/4/2010 Batesville, TX SCHEMPP-HIRTH VENTUS-2B N7470C CEN10LA459A Fatal 0 MIDFLT FLT MID G-G
6/15/2010 Parowan, UT SCHLEICHER ALEXANDER ASH 26 E N455S WPR10LA294A Non-Fatal 0 MIDFLT FLT MID G-G
6/15/2010 Parowan, UT SCHEMPP-HIRTH Ventus 2CT N514TW WPR10LA294A Non-Fatal 0 MIDFLT FLT MID G-G
2/6/2010 Boulder, CO SCHWEIZER SGS 2-32 N2472W CEN10FA115C Fatal 3 MIDFLT FLT MID TP-GA
11/28/2009 Middletown, CA SCHLEICHER ASW-27 N127AL WPR10FA068A Fatal 2 MIDLDG LDG MID G-TP
8/9/2008 Brackettville, TX Schempp-Hirth Ventus 2A N777UN DEN08LA137A Non-Fatal 0 MIDFLT FLT MID G-G
8/9/2008 Brackettville, TX AB Sportine Aviacija Genesis 2 N110RG DEN08LA137B Non-Fatal 0 MIDFLT FLT MID G-G
8/28/2006 Smith, NV Schleicher ASW27-18 N7729 LAX06FA277B Non-Fatal 0 MIDFLT FLT MID G-GA
4/1/2004 Oso, WA Glaser-Dirks DG-400 N400WJ SEA04LA063B Fatal 1 MIDFLT FLT MID G-G
4/1/2004 Oso, WA Glasflugel STD Libelle 201B N161D SEA04LA063A Fatal 0 MIDFLT FLT MID G-G
12/28/2003 Peoria, AZ Schleicher ASK-21 N274KS ANC04FA016B Fatal 4 MIDFLT FLT MID G-GA
5/1/1999 HILLTOWN, PA Burkhart Grob G-103 TWIN II N47938 IAD99FA041B Fatal 3 MIDFLT FLT MID G-TP
12/19/1998 OKEECHOBEE, FL Let L-13 N98KK MIA99LA051B Non-Fatal 0 MIDFLT FLT MID G-GA
6/29/1996 BOULDER, CO Burkhart Grob G103C TWIN III N103LM FTW96FA279B Fatal 2 MIDLDG LDG MID G-GA
5/8/1994 ELBERT, CO ROLLADEN-SCHNEIDER LS-4 N4MN FTW94LA151 Non-Fatal 0 MIDLDG LDG MID G-TP