2018
Aerospace & Defense

NASA's Langley Research Center has developed a new adhesively bonded joint concept for curved and flat panel sandwich architectures. A woven preform, inserted into the seam between sandwich panels, provides a larger total bonding area and multiple load paths for an improved distribution of load through the joint. NASA is able to create structures by joining sections of sandwich panels or curved shells. The new joint provides more durable load transfer and redundant load paths compared to current state-of-the-art adhesively bonded strap joints.

Benefits

•Increased safety factor: reduced stress concentration on the joint
•Dual bond line for mitigation of manufacturing defects: redundant load path allows load redistribution in the case of partial joint failure
•Improved mass-efficient load transfer capability that can be tailored ...

By 2050 it is estimated that 68% of the world's population will live in cities. This will cause even more traffic in cities, a big problem especially in those cities that already have huge traffic problems with no infrastructure to fix these issues. New creative methods will be needed to solve the traffic dilemma. One solution that would not involve adding much infrastructure would be utilizing a third dimension. A vertical takeoff and landing (VTOL) tail sitter aircraft would make use of this third dimension and create an upward outlet for some of this traffic. Eventually, the commute in to work from the suburbs, will not only be more exciting, it will also be much faster.

Our VTOL aircraft will ...

We have developed a lightweight, quiet, portable emergency power pack for use in any field. Unlike the current lithium ion batteries used by the military, which have low energy density and pose safety concerns, our system can reduce fatigue on soldiers by safely providing them with ten times the energy stored in current lithium-ion batteries (1500 Wh/kg vs. 150 Wh/kg). The emergency power pack uses our patented aluminum fuel which can be reacted with almost any water source, including waste water, to generate heat and hydrogen on demand. The hydrogen is fed to a fuel cell to generate clean electricity safely and silently.

The emergency power pack has three distinct features: a disposable fuel bag which stores the reactive ...

Human life is most precious as resurrection is still impossible. Of course we don’t have enough guts to take risks with our life. This is the main reason for which man has gone through the quest of some alternative go. Finally the result is unmanned aerial vehicle (UAV) which can do the complex works of man in a simple way without any major risk. The UAV is a type of aircraft which has no on-board crew or passengers. A UAV differs from a cruise missile, in that a UAV is recovered after its mission while a cruise missile impacts its target. While speaking about UAVs we always think about a quadcopter. They can fly anywhere and transmit the information ...

ARVA represents a new aircraft concept with a configuration that is safe, quiet and efficient as well as easy to control, high compact and which is able to accomplish vertical takeoff and landing with transition to and from forward flight. The new ARVA concept uses a revolutionary design, generating lift within a relatively small body by employing a unique combination of lifting surfaces. This is primarily because it allows the creation of an extremely compact aerial vehicle which has VTOL capabilities and high lifting efficiencies.

This new Advanced Reconfigurable VTOL Aircraft - ARVA using Distributed Electric Propulsion- DEP will revolutionize regional flying and provide an accessible and affordable transportation platform for both the commercial and civilian/military markets while reducing ...

In general prototype models of aerospace vehicle, aircraft or high speed wing bodies (even in automobiles), objects are tested in a wind tunnel test facility to get theoretical data to design the object at optimum solutions. Wind tunnels are available in a large range of mach numbers at subsonic to hyper velocity flow range. Before testing a model with a wind tunnel test facility, it is necessary to calibrate the flow parameters such as pressure, mach number, velocity, density, temperature distribution throughout the test section of the wind tunnel in 3 dimensions. In practice for getting optimum solution it is assumed that the flow over a wing body or test specimen should be a laminar flow and its is ...

Drop bags are for low-level airdrops beneath radar. These are a combination of safety bag and gas propelled retro rockets. Use is primarily for clandestine missions and as safety bags for rotary wing aircraft where parachutes cannot be operated.

The airbags are made from a very durable, soft Dyneema UD-SB. for ‘soft ballistic’ armor to protect against handgun ammunition and shrapnel. Unlike normal auto safety bags, Drop bags look more like a cream filled donut of giant bubble wrap, with a large elliptical double walled bubbles on the bottom and top. Rather than air, helium is used and the bags explode into position after sufficiently clearing the aircraft. A small chute is used to make sure the package does ...

I want to reduce airplane loss of control accidents. Some of these accidents happen because the flyer's imagination does not match reality. Since the air is invisible, our imaginations could be wrong or confused.

I have seen air made visible by very sparse, oversize and buoyant snowflakes. In a near lifetime of flying I have seen this only once. I have reminded myself by driving a car through heavy snowfall.

A statistical sample of true airspeeds ahead could be displayed on a heads-up-display. LIDAR does the sampling, a microprocessor, the statistics then a graphic device puts up synthesized snowflakes spreading out from the direction through the air. The earth is irrevelant to this display. The displayed snowflakes only show ...

Deep stall recovery system
Aircraft stall can cause catastrophic damage to the aircraft and passengers. Using the standard procedure of stall recovery, aircraft can be recovered from the stall. Take an example of Colgan Air Flight 3407. In 2009, Bombardier Dash-8 Q4000 entered in deep aerodynamic stall during landing approach. This Stall caused 50 fatalities and 4 injuries. Hence to reduce stress on pilot in a case of deep stall, Aircraft Nerds have come up with this system.

How deep stall occurs?
Aircraft Stall is a condition when an airflow detaches from the aircraft wing. Flow separation results in loss of lift and aircraft starts losing its altitude. Mainly couple of reasons are responsible for stall. One reason is ...

NASA's Langley Research Center has developed an inexpensive, long endurance vertical takeoff and landing UAV. It is capable of flying for 24 hours, landing in a 50 x 50 zone, and can be loaded into the back of a cargo van for easy transport. In addition, it can land in an either horizontal or vertical flight configuration. The vehicle can be used in any application where UAVs are needed to take off from, or land in, an unprepared landing area.

Benefits

•Can take off and land vertically, as a helicopter would, without any support equipment such as a catapult launch or capture nets
•High aspect ratio wings result in 24 hour endurance which is unmatched in the industry

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