Largest civilian formation flight

According to Official Guinness Records,

The largest civilian formation flight consisted of 37 Van's RV Aircraft led by Stu McCurdy (USA). They flew in different close formations during the AirVenture09 Airshow in Oshkosh, Wisconsin, USA, on 28 -29 July 2009
Stu McCurdy also held the previous record. The formation in 2009 was flown to comemmorate the 10th anniversary of FFI (Formation Flying Inc.)

For a complete list of 2009 records, please visit 2009 Guinness Records in United States.

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