Beechcraft pilot reported a near-midair-collision after takeoff from 6b6 non-towered airport.

Attributes
ACN	1523538
Time
Date	201802
Local Time Of Day	1201-1800
Place
Locale Reference	6B6.Airport
State Reference	MA
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Bonanza 33
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Route In Use	Direct
Flight Plan	None
Aircraft 2
Make Model Name	Bonanza 36
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 3500 Flight Crew Type 1500
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 25 Vertical 25

Narrative:

VFR day near miss after takeoff passing 400 feet AGL. I was number two for takeoff following a cessna 172. Another bonanza reported entering downwind from southeast. Cessna 172 takes runway and announces 'departing runway 21'. Bonanza announces 'entering downwind'. I take runway and announce 'bonanza X departing runway 21'. Bonanza Y announces 'have you in site'. Bonanza Y announces 'I no longer have you in site'. As I pass 400 feet AGL; bonanza Y passed under me by approximately 25 feet; traveling from my right side; slightly behind to my left side behind. I believe bonanza Y took evasive action. Bonanza Y announces 'what runway are you using?' I departed straight ahead towards ZZZ.

Original NASA ASRS Text

Title: Beechcraft pilot reported a near-midair-collision after takeoff from 6B6 non-towered airport.

Narrative: VFR DAY Near miss after takeoff passing 400 feet AGL. I was number two for takeoff following a Cessna 172. Another Bonanza reported entering downwind from southeast. Cessna 172 takes runway and announces 'departing runway 21'. Bonanza announces 'entering downwind'. I take runway and announce 'Bonanza X departing runway 21'. Bonanza Y announces 'have you in site'. Bonanza Y announces 'I no longer have you in site'. As I pass 400 feet AGL; Bonanza Y passed under me by approximately 25 feet; traveling from my right side; slightly behind to my left side behind. I believe Bonanza Y took evasive action. Bonanza Y announces 'what runway are you using?' I departed straight ahead towards ZZZ.

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.