Extra 200/300 Series
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Flight Instructor; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 216; Flight Crew Total 4282; Flight Crew Type 137
Situational Awareness
Conflict Ground Conflict; Critical; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Fuel Issue
Flight Crew Took Evasive Action; Flight Crew Landed As Precaution
Aircraft; Procedure; Human Factors
After conducting an aerobatic practice flight; I entered the pattern on the 45 degree leg to downwind behind two other aircraft; a Cherokee and a C182.  The Cherokee was operated by the local flight school and was in front of the C182.  The C182 was flying a wider than normal downwind; 3 times the size recommended by the airport.  The Cherokee did the same and flew a 1.7 mile long final with no other traffic in front of him.  This caused me to perform two 360 degree turns to increase spacing.  I also performed S-turns on final but got too close to the C182 so I went around.  During the go-around the C182 announced that he was disabled on the runway.  I orbited and then started to divert to ZZZ1 but realized that I did not have enough gas to get there.  I returned to the ZZZ pattern; declared a fuel emergency on CTAF and landed without incident on taxiway A.  My low fuel state was caused by two factors: the excessively large traffic patterns flown by flight schools causing two 360 deg turns; s-turns; and a go-around; and the limitation of the Extra 300/S to prohibit aerobatic flight with fuel in the wing tanks limiting the amount of fuel on board to 12.9 gallons.The FAA must push flight schools to fly tighter traffic patterns.  The ZZZ airport requests GA traffic to fly a 1/2 to 3/4 mile downwind and flight schools typically fly 1 to 1.5 mile down winds.
GA pilot reported running low on fuel with the runway closed and without sufficient fuel to divert; elected to land on a taxiway.