Perry Mick wrote:

http://www.faa.gov/avr/afs/sportpilot/

It specifically says "non-turbine" engine on this page.

http://www.faa.gov/avr/afs/sportpilot/comment.cfm

For questions on aircraft certification and identification (14 CFR parts
21 and 45), contact Scott Sedgwick,
Aircraft Certification Service,
Small Airplane Directorate (ACE-100),
Federal Aviation Administration,
901 Locust Street,
Kansas City, MO 64106;
telephone 816-329-2464; fax 816-329-4090; e-mail
9-ACE-AVR-SPORTPILOT-QUESTIONS@faa.gov
<mailto:9-ACE-AVR-SPORTPILOT-QUESTIONS@faa.gov>.

 
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