Glider pilot reported an near midair collision with a light single near P48 airport.

Attributes
ACN	1002077
Time
Date	201203
Local Time Of Day	1201-1800
Place
Locale Reference	P48.Airport
State Reference	AZ
Aircraft 1
Make Model Name	Sail Plane
Operating Under FAR Part	Part 91
Flight Phase	Descent
Route In Use	Visual Approach
Flight Plan	None
Aircraft 2
Make Model Name	Piper Single Undifferentiated or Other Model
Person 1
Function	Single Pilot
Qualification	Flight Crew Commercial
Experience	Flight Crew Last 90 Days 29 Flight Crew Total 8090 Flight Crew Type 5000
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 0 Vertical 75

Narrative:

Light single engine piper passed 50 - 100 ft below me as I was approaching ip; crossing the departure end of runway 23 about 1;400 ft above ground. The airplane approached from my 7 o'clock direction; departing (continuing) away about my 1 o'clock direction. At the time I was flying about 45 mph and I would estimate the other aircraft cruising past me at over 100 mph. I based my estimate on vertical separation on the wingspan of the glider I was flying which is 51 ft. They passed directly underneath me within one or two of my wingspans.

Original NASA ASRS Text

Title: Glider pilot reported an NMAC with a light single near P48 airport.

Narrative: Light single engine Piper passed 50 - 100 FT below me as I was approaching IP; crossing the departure end of Runway 23 about 1;400 FT above ground. The airplane approached from my 7 o'clock direction; departing (continuing) away about my 1 o'clock direction. At the time I was flying about 45 MPH and I would estimate the other aircraft cruising past me at over 100 MPH. I based my estimate on vertical separation on the wingspan of the glider I was flying which is 51 FT. They passed directly underneath me within one or two of my wingspans.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.