Boeing T60

The Boeing T60 (company designation Model 520) was a family of small turboshaft/turboprop engines produced by Boeing, based on Boeing's earlier Model 500 gas generator and Model 502 (T50) turboshaft engines.

Variants

 * YT60-BO-2A:Military turboshaft version for testing.
 * 520-2:(YT60-BO-2A) Free power turbine turboshaft rated at 475 hp
 * 520-4:Turboprop rated at 475 hp
 * 520-6:Direct drive turboshaft rated at 550 hp military power
 * 520-8:Turboprop rated at 550 hp