Tow plane pilot reported a near mid air collision with an aircraft while climbing with glider in-tow...

Attributes
ACN	1492713
Time
Date	201710
Local Time Of Day	0601-1200
Place
Locale Reference	7S5.Airport
State Reference	OR
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Aircraft Low Wing 1 Eng Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Flight Plan	None
Aircraft 2
Make Model Name	Amateur/Home Built/Experimental
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	None
Flight Plan	None
Person 1
Function	Single Pilot
Qualification	Flight Crew Commercial Flight Crew Glider
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 3000 Flight Crew Type 25
Events
Anomaly	Conflict NMAC Deviation - Procedural Published Material / Policy
Miss Distance	Horizontal 0 Vertical 100

Narrative:

Departed 7s5 runway 34 with glider in tow; announced departure and routine cautionary message of: (tow plane and glider departing 34 using non-standard right hand traffic pattern. Power[ed] traffic please use published left hand traffic pattern). Turning to right down wind a small [powered] aircraft emerged from under my raised left wing passing over the canopy at an estimated range of 100 ft.spoke with the pilot of the [small powered aircraft] who stated he saw the tow plane and glider climbing out of the airport but could not determine our intended direction of flight. Pilot also stated he did not hear our radio announcement as we departed the airport.7s5 is a rural uncontrolled airpark community with a glider operating opposite the published traffic pattern for safe separation of glider and power[ed] traffic. A recommended corrective action: practicing a greater situational awareness to potential air traffic.

Original NASA ASRS Text

Title: Tow plane pilot reported a near mid air collision with an aircraft while climbing with glider in-tow.

Narrative: Departed 7S5 Runway 34 with glider in tow; announced departure and routine cautionary message of: (Tow plane and glider departing 34 using non-standard right hand traffic pattern. Power[ed] traffic please use published left hand traffic pattern). Turning to right down wind a small [powered] aircraft emerged from under my raised left wing passing over the canopy at an estimated range of 100 ft.Spoke with the pilot of the [small powered aircraft] who stated he saw the tow plane and glider climbing out of the airport but could not determine our intended direction of flight. Pilot also stated he did not hear our radio announcement as we departed the airport.7S5 is a rural uncontrolled airpark community with a glider operating opposite the published traffic pattern for safe separation of glider and power[ed] traffic. A recommended corrective action: Practicing a greater situational awareness to potential air traffic.

Data retrieved from NASA's ASRS site 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.