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Technical Paper

Computer Aiding for Low-Altitude Flight Simulation to Flight: A Case Study

The system was developed using extensive piloted simulation and then implemented in a UH-60 Blackhawk helicopter for flight development and evaluation. A close correlation between simulation and actual flight was found; however, in flight overall pilot workload increased and performance decreased.
Technical Paper

US Army UH-60M Helicopter Main Rotor Ice Protection System

Sikorsky Aircraft Corporation designed a new advanced technology composite main rotor blade for a growth BLACK HAWK helicopter, now designated the UH-60M. The UH-60M main rotor blade has new airfoils, a larger blade chord, and a swept, tapered, anhedral tip, with a rotor ice protection system (RIPS) similar to that of the UH-60A/L helicopter. The UH-60A/L RIPS control system was retained and the new blades were fitted with heater elements similar in geometry to those of the UH-60A/L main rotor blades, but with the outboard extent of the heater mat 10 inches more inboard than that of the UH-60A/L and the woven wire heater resistance was changed to maintain the same power density as the UH-60A/L. Analyses and S-92A® helicopter artificial and natural icing flight test data show that the increased blade chord, improved airfoils, and advanced blade geometry result a minimal change in BLACK HAWK icing flight characteristics.

Sikorsky’s autonomous Black Hawk helicopter takes flight

Sikorsky tested a new full-authority, fly-by-wire flight control technology kit for the first time on a Sikorsky UH-60 Black Hawk medium-lift utility helicopter. The flight marked the beginning of the flight test program for the soon-to-be optionally piloted rotorcraft.

SES to outfit Sikorsky UH-60A Black Hawk helicopters with Unitech Composites weapons pylons

Unitech Composites, a Unitech Aerospace company in Hayden, Idaho, is providing its Lightweight Armament Support Structure (LASS) composite weapons pylons to maintenance, repair, and overhaul (MRO) company Science and Engineering Services (SES) in Columbia, Md., for use on Sikorsky UH-60A Black Hawk helicopters the U.S. Army is supplying to the government of Afghanistan through the U.S. Department of Defense’s Foreign Military Sales (FMS) program.
Technical Paper

Advanced Overrunning Clutch Technology

This paper summarizes the results of a 3 year research program to advance the state-of-the-art in helicopter free-wheel units (overrunning clutches) by permitting operation at 20,000 rpm. By designing the free-wheel unit to operate at engine input speed instead of at the speed of the 2nd reduction where it is usually located, the torque, and hence size and weight of the unit, will be reduced. High-speed designs, test results, and application of the designs to the UH-60A BLACK HAWK are presented for spring, sprag, and ramp roller types of overrunning clutches.
Technical Paper

Helicopter Cargo -- New Opportunities Through Technology Transfer

The value of helicopter-augmented air cargo has been demonstrated and greater exploitation of its opportunities has awaited only the emergence of a low-cost, reliable cargo helicopter. One such aircraft is the Sikorsky S-70C, a close derivative of the U.S. Army UH-60A Black Hawk utility transport helicopter, recently certificated by the U.S. FAA for cargo transport and related missions. The use of such advanced helicopters to augment fixed-wing priority express service between major cities is shown to offer substantial time savings, and corresponding improvements in a forwarder's market share, at a disproportionately small increase in total cost.
Technical Paper

A Review of Recent Programs and Future Plans for Rotorcraft In-Flight Simulation at Ames Research Center

A new flight research vehicle, the Rotorcraft-Aircrew Systems Concepts Airborne Laboratory (RASCAL), is being developed by the U.S. Army and NASA at Ames Research Center. The requirements for this new facility stem from a perception of rotorcraft system technology requirements for the next decade together with operational experience with the Boeing Vertol CH-47B research helicopter that was operated as an in-flight simulator at Ames during the past 10 years. Accordingly, both the principal design features of the CH-47B variable-stability system and the flight-control and cockpit-display programs that were conducted using this aircraft at Ames are reviewed. Another U.S. Army helicopter, a Sikorsky UH-60A Black Hawk, has been selected as the baseline vehicle for the RASCAL. The research programs that influence the design of the RASCAL are summarized, and the resultant requirements for the RASCAL research system are described.
Technical Paper

A History of Ice Protection System Development at Sikorsky Aircraft

Modern rotorcraft must have the capability to operate in all-weather conditions. Sikorsky Aircraft has conducted icing research and ice protection system development for helicopters over the past 58 years and the pace of that work has accelerated during the past two decades. Sikorsky participated in several helicopter icing flight tests, conducted wind tunnel tests of scale models and full-scale components, tested simulated ice shapes, and developed analytical tools for use in the design, certification, and qualification for flight in icing conditions. Engine inlets, airspeed systems, main rotor droop stops, and windshields are generally protected by thermal anti-icing systems. When rotor ice protection is required, rotors are protected with electrothermal deice systems. The UH-60A BLACK HAWK electrothermal rotor ice protection system, developed in the late 1970s, has been installed in 2400 H-60 helicopters and it remains one of the most effective rotor ice protection systems.

Aerospace & Defense Technology: February 2019

Ruggedizing Commercial-Grade Computers into MIL-Hardened Systems An Introduction to PCM Heat Sinks Eye Tracking Technology Improving the Skills Gap, Efficiency, and Quality Assurance in Aerospace Manufacturing Streamlining EMC Solutions for Avionics Interfaces Hardware Design of a High Dynamic Range Radio Frequency (RF) Harmonic Measurement System. Using RISC-V to Simplify Data Logging in Space Novel Characterization Methods for Anisotropic and Mixed-Conduction Materials Seven new characterization methods have been developed for the specialized materials used in state-of-the-art electronic and optoelectronic devices. Circuit Models for Robust, Adaptive Neural Control Understanding a nematode's simple circuit could provide a foundation for understanding much more complex behaviors.

Aerospace Engineering & Manufacturing 2010-03-10

CAM's converging byways "Art to part" is an ancient catchphrase. But it's taking on new dimensions with advances in machine controllers, inter-machine communications, and design approaches.

Aerospace Engineering 2012-09-12

A paradigm shift in offline programming of robots CAD-based offline programming has the potential to take into account design changes to a certain extent, avoiding time-consuming and thus expensive reprogramming after an engineering design change.

Aerospace Engineering 2001-07-01

Giving ice the boot Atmospheric icing was for many years one of the majoy threats to aircraft safety- and it potentially still is. Researchers at Dunlop Aviation Ice Protection and Composites continue their development of deicing and anti-icing technologies. The art of wing assembly Airbus Industries investigates new technologies and techniques for improving quality and reducing cost of its wing box assemblies. Affordable engines for small aircraft A look into the new technologies developed for small-aircraft engines as extensions to the cooperative agreements under the NASA General Aviation Propulsion program conclude.

Aerospace Engineering 1992-06-01

The world of regional jets Commonality and a family approach are characteristic of the latest regional jets developed or under development by Fairchild Dornier, Bombardier, and Embraer.