C172 pilot reported an near midair collision with an experimental aircraft at a non-towered airport ...

Narrative:

Our plane [is a] C172 with G1000 and tis. [An] experimental called position [inbound to the same airport]. We responded with our position. He said we will probably beat him in as he had 80 for ground speed; 29 KT wind. We began our descent to 1;100. Tis reported a target moving from east to west in front of the [experimental]. We let [him] know of the target. He said he was looking 'no joy.' tis showed a conflict with our path. C172 pilot and passenger [were] visually looking for target; but it was pretty hazy. Tis shows no plane is moving behind or ahead on intersecting path. We decide to vy climb at full power. [We were] still looking and still no visual contact. I was taught that the best thing to do is climb in potential conflict as the plane becomes much more visible by showing more surface area.tis showed a -40 and target passing directly underneath. Tis changed target to yellow and audible 'traffic' alarms trigger. At this point I noticed [I was] in vy climb at 2;500 ft [and in class B]. [I] began immediate descent back under the 2;000 ft [class B] shelf and set up for entering the traffic pattern. The [applicable] far here is 'a pilot may deviate from the fars as much as necessary to maintain the safety of his plane and crew.' [I] made call [at] 2 miles for mid 45 upwind for 15. Turn on the adsb to report all the time not just when a sender lights it up.

Original NASA ASRS Text

Title: C172 pilot reported an NMAC with an experimental aircraft at a non-towered airport and during evasive action he entered Class B airspace.

Narrative: Our plane [is a] C172 with G1000 and TIS. [An] experimental called position [inbound to the same airport]. We responded with our position. He said we will probably beat him in as he had 80 for ground speed; 29 KT wind. We began our descent to 1;100. TIS reported a target moving from east to west in front of the [experimental]. We let [him] know of the target. He said he was looking 'no joy.' TIS showed a conflict with our path. C172 pilot and passenger [were] visually looking for target; but it was pretty hazy. TIS shows no plane is moving behind or ahead on intersecting path. We decide to Vy climb at full power. [We were] still looking and still no visual contact. I was taught that the best thing to do is climb in potential conflict as the plane becomes much more visible by showing more surface area.TIS showed a -40 and target passing directly underneath. TIS changed Target to yellow and audible 'traffic' alarms trigger. At this point I noticed [I was] in Vy climb at 2;500 FT [and in Class B]. [I] began immediate descent back under the 2;000 FT [Class B] shelf and set up for entering the traffic pattern. The [applicable] FAR here is 'A pilot may deviate from the FARs as much as necessary to maintain the safety of his plane and crew.' [I] made call [at] 2 miles for mid 45 upwind for 15. Turn on the ADSB to report all the time not just when a sender lights it up.

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.

Attributes
ACN	1158251
Time
Date	201303
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Direct
Flight Plan	VFR
Aircraft 2
Make Model Name	Amateur/Home Built/Experimental
Flight Phase	Descent
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 4 Flight Crew Total 140 Flight Crew Type 140
Events
Anomaly	Airspace Violation All Types Conflict NMAC
Miss Distance	Horizontal 0 Vertical 400

C172 pilot reported an near midair collision with an experimental aircraft at a non-towered airport and during evasive action he entered class B airspace.