>Who makes the engines that go on the MD90?
International Aero Engines (IAE).
>Do they not have the clam shell reverse thrusting system?
No. "The thrust reverser system consists of C-ducts, translating sleeves, blocker doors and cascades." IOW, the aft cowling section moves rearward positioning "blocker doors" that reverse the fan air only.
>Whats different about the MD 90 engines versus the MD 80 engines
>as far as horse power and stuff like that goes?
AA MD82: JT8D-217 engines rated at 20,000 lbs thrust.
AA MD83: JT8D-219 engines rated at 21,000 lbs thrust.
AA MD90: V2528-D5 engines rated at 28,000 lbs thrust.
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