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Engine Infra-Red (IR) Signature Suppression

Award Information

Department of Defense
Special Operations Command
Award ID:
Program Year/Program:
1995 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Piasecki Aircraft Corporation
519 West Second Street P.O. Box 360 Essington, PA 19029-0360
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 1995
Title: Engine Infra-Red (IR) Signature Suppression
Agency / Branch: DOD / SOCOM
Contract: N/A
Award Amount: $100,000.00


The objective of this project is to develop a lightweight, low drag IR (infra-red light spectrum) suppression system for SOF aircraft. Power, weight and aircraft performance are negatively effected by traditinal suppression concepts and therefore, a new approach to the design problem is required. The proposed design effort will explore a unique design solution to reduce weight and aircraft drag. A complaint flexible seal between the turbine's aft flange and the suppressor duct provides reduced vibration load in the suppressor so material thickness can be reduced. The cooling process utilized in this design is a combination of high level of exhaust plume dilution by ejection of ambient air, cooling of exposed parts, and shielding of hot turbine parts. Advanced high temperature composite materials are currently available that are 30% lighter than traditional turbine exhaust materials. The drag impacts are minimizd by a high aspect ratio duct with close fairing to the engine nacelle. Analysis will be conduted to establish the performance of the design as well as the estimated weight and drag impacts. The applicability of such a lightweight suppression system will be evaluated for the following SOF aircraft: C-130, H-47D, H-53D, H-60, and the MV-X.

Principal Investigator:

Fred W. Piasecki

Business Contact:

Small Business Information at Submission:

Piasecki Aircraft Corp
West Terminus Of Second Street Essington, PA 19029

Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No