Hydrogen Fueled Transport Aircraft

Parametric Study of Ascent Performance of a Vertically Launched Hydrogen-Fueled Single-Stage Reusable Transport

A Centennial Review of Sub-sonic Transport Aircraft

From Wright Brothers 1903 to present day 2003, aeronautical technology has made a profound progress. This paper demonstrates the outcome of this progress in weight, wing area, and engine thrust in three categories of transport aircraft of short to long range, regional jets, and turbo-prop commuter aircraft. Also the paper includes those aircraft with distinct jump in aeronautical technology. Fe...

Assessing Transport Aircraft Inspection Strategies

Complex aircraft require periodic maintenance checks to assess needed repairs for continued vehicle availability. However, such checks are expensive and the associated aircraft downtime can reduce fleet mission effectiveness. The United States Air Force plans to consolidate the time-based (isochronal) C-5 aircraft major inspection activities for eight C-5 home stations into three locations. Iso...

Hydrogen Transport with Chloroplasts

A biochemical approach to the study of photosynthesis in terms of hydrogen transport is de­ scribed. In particular, the system concerned with reduction of the coenzymes has been found to depend on two proteins: a non haem iron protein closely connected with a photochemical reaction and a flavoprotein which acts as a reductase. The iron protein, previously known as “methaemoglobin reducing facto...

Theoretical study of the effect of hydrogen addition to natural gas-fueled direct-injection engines

The preparation of air–fuel mixture is considerably dependent on fluid flow dynamics to achieve improved performance, efficiency, and engine combustion in the appearance of flow. In this study, the effects of mixtures of hydrogen and compressed natural gas (CNG) on a spark ignition engine are numerically considered. This article presents the results of a direct-injection engine using methane–hy...