Indy Aircraft
Indy Aircraft Limited is an American aircraft manufacturer based in Independence, Iowa. The company specializes in the manufacture of ultralight aircraft in the form of kits for amateur construction.
The company traces its lineage to Teratorn Aircraft, which was formed in 1976 in Clear Lake, Iowa and which introduced the Teratorn Tierra and Teratorn Tierra II aircraft designs in 1983. When Teratorn went out of business in about 1989 the Tierra designs were put back into production by Golden Circle Air of De Soto, Iowa as the Golden Circle Air T-Bird line. Golden Circle Air went out of business in about 2006 and Indy Aircraft was formed to provide parts for the existing fleet. In 2011 the company restored the T-Bird and T-Bird II to production. More than 1500 Tierra/T-Bird Is and 2500 Tierra II/T-Bird IIs have been constructed by all manufacturers of the types in total.
Indy aircraft has put the T-Bird I and T-Bird II back into production, but not the Golden Circle Air three-seat T-Bird III or the tandem-seat T-Bird Tandem TBT06. The company indicated it has plans to have its aircraft approved for the American light-sport aircraft category, but as of April 2017 neither of its types had been accepted by the US Federal Aviation Administration as SLSAs.
Aircraft
| Model name | First flight | Number built | Type |
| Indy T-Bird I | 1983 | more than 1500 Tierras and T-Birds | Single seat kit aircraft |
| Indy T-Bird II | 1983 | more than 2500 Tierra IIs and T-Bird IIs | Two seat kit aircraft |