Exploring glacial change - flying in the tailwind of the early 20th century Greenland explorers

DEFF Research Database (Denmark)

Bjork, A. A.; Kjaer, K. H.; Kjeldsen, K. K.

In the early 1930s Greenlandic explorers and scientists began using airplanes as an effective mean of surveying and mapping the hitherto unknown and inaccessible lands. By replacing the dogsled and the drawing board with the seaplane and camera, huge areas could now be covered. Here in the 21st...

14 CFR 23.753 - Main float design.

Science.gov (United States)

2010-01-01

... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Main float design. 23.753 Section 23.753... STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Design and Construction Floats and Hulls § 23.753 Main float design. Each seaplane main float must meet the requirements of § 23.521. [Doc...

14 CFR 23.755 - Hulls.

Science.gov (United States)

2010-01-01

... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Hulls. 23.755 Section 23.755 Aeronautics... Hulls § 23.755 Hulls. (a) The hull of a hull seaplane or amphibian of 1,500 pounds or more maximum weight must have watertight compartments designed and arranged so that the hull auxiliary floats, and...

14 CFR 25.1399 - Riding light.

Science.gov (United States)

2010-01-01

... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Riding light. 25.1399 Section 25.1399... STANDARDS: TRANSPORT CATEGORY AIRPLANES Equipment Lights § 25.1399 Riding light. (a) Each riding (anchor) light required for a seaplane or amphibian must be installed so that it can— (1) Show a white light for...

14 CFR 23.527 - Hull and main float load factors.

Science.gov (United States)

2010-01-01

... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Hull and main float load factors. 23.527... Water Loads § 23.527 Hull and main float load factors. (a) Water reaction load factors nw must be...=seaplane landing weight in pounds. (6) K1=empirical hull station weighing factor, in accordance with figure...

VMLO: The Strategic, Operational and Tactical imperative for a Light Observation Squadron with the USMC

Science.gov (United States)

2012-06-01

Improvised Explosive Device IFR Instrument Flight Rules IMC Instrument Meteorological Conditions IR Infrared ISAF International Security and...CAT 1 IFR Dual LOS/BLOS/USF/SATCOM Seaplane T/O < 2500 170 KIAS Cruise 25,000’ Service Ceiling Side Loading Cargo Door Minimum 8...overruns and uncertainty over what models of the F- 35 the Marines will use are jeopardizing their ability to provide organic CAS to units. 1. Rapid

Tank Tests on Water Rudders for Float Seaplanes

Science.gov (United States)

1939-11-01

a Jr.l;.’ to inveeti -atj the technique of the method . Cone luol one At a speod oi 10 knots In the flrat set o. tout a the yawing moments...required for maintaining a atrni ht aourse in a slduulnd. The whirling arm method can lvo iwauuremunta ol tho turning sireles obtainable with dl.ferent...ore« aa« paala« aaaaata.1,1’ It »aa aaaiawd that taa air an« « atar roadero aora« thron-h -h» aaao angle. .1« balance of too lorceo aa

The United States Army Air Arm, April 1861 to April 1917

Science.gov (United States)

1985-01-01

the enlisted men messing with a coast artillery company and Geiger living at the Fort.84 The base at Fort Kamehameha was far from satisfactory...station at Fort Kamehameha , and the fourth to the Canal Zone. The Philippine and Hawaiian companies were to have seaplane equip- ment but were to have no...fol- lowed by Capt. John B. Brooks and 49 men, who sailed on the March transport. They were sta- tioned temporarily at Fort Kamehameha while Curry

RFB research and development in WIG vehicles

Science.gov (United States)

Fischer, Hanno

An account is given of the development history of wing-in-ground (WIG) effect aircraft at a major West German aircraft manufacturer since 1964; these efforts have encompassed the development of the X113 and X114 'airfoilboat' WIG seaplanes. Attention is given to the aerodynamic efficiency and operational economy trends that result from up-scaling of WIG craft configurations to takeoff gross weights of the order of 300 tons. Also noted is the illustration of comparative efficiency among types of transportation, including WIG vehicles, given by the von Karman-Gabrielli diagram.

Eesti Meremuuseumi hoone Lennusadamas = Estonian Maritime Museum in the Tallinn Seaplane Harbour

Index Scriptorium Estoniae

2015-01-01

Eesti Meremuuseumi rekonstrueeritud vesilennukite angaarid Tallinnas Vesilennuki 6, valminud 2012. Eesti kultuurkapitali aastapreemia 2012. Arhitektid Raivo Kotov, Andrus Kõresaar, Indrek Mikk, Margit Aule, Tõnis Savi, Lea Laidra, Karis Kahr, Jelena Altmäe, Jaanus Männik (KOKO Arhitektid). Sisearhitektid Margit Argus, Andrus Kõresaar, Olga Batuhtina (KOKO Arhitektid). Raudbetoonkonstruktsioonide renoveerimisprojekt Karl Õiger, Heiki Onton (Tallinna Tehnikaülikool). Uued konstruktsioonid Neoprojekt

Economic considerations for deep water Gulf of Mexico development

International Nuclear Information System (INIS)

Brown, R.; O'Sullivan, J.; Bayazitoglu, Y.O.

1994-01-01

This paper examines the economic drivers behind deep water development in the Gulf of Mexico. Capital costs are also examined versus water depth and required system. Cost categories are compared. The cost analysis was carried out by using the SEAPLAN computer program. The program is an expert system that identifies, conceptually defines, and economically compares technically feasible approaches for developing offshore oil and gas fields. The program's sizing logic and cost data base create physical and cost descriptions of systems representative of developments being planned in the deep water GOM. The examination was done separately for oil and gas developments. The material presented here is for only oil, it serves as a useful framework for viewing development economics and technology trends

Estimation of Hydrodynamic Impact Loads and Pressure Distributions on Bodies Approximating Elliptical Cylinders with Special Reference to Water Landings of Helicopters

Science.gov (United States)

Schnitzer, Emanuel; Hathaway, Melvin E

1953-01-01

An approximate method for computing water loads and pressure distributions on lightly loaded elliptical cylinders during oblique water impacts is presented. The method is of special interest for the case of emergency water landings of helicopters. This method makes use of theory developed and checked for landing impacts of seaplanes having bottom cross sections of V and scalloped contours. An illustrative example is given to show typical results obtained from the use of the proposed method of computation. The accuracy of the approximate method was evaluated through comparison with limited experimental data for two-dimensional drops of a rigid circular cylinder at a trim of 0 degrees and a flight -path angle of 90 degrees. The applicability of the proposed formulas to the design of rigid hulls is indicated by the rough agreement obtained between the computed and experimental results. A detailed computational procedure is included as an appendix.

Methodological fundamentals for increase of effectiveness designing both safety of operation of seaplanes and amphibians

Directory of Open Access Journals (Sweden)

А.А. Rasstrygin

2005-04-01

Full Text Available  On the basis of earlier developed methodology of estimation of local and general hydrodynamics of amphibious and water-landing aircrafts, some outcomes of numerical researches of hydrodynamic parameters and their analysis for a mild multi-purpose amphibian are adduced at different versions of interplay with water surface on take-off and landing modes.

Comparison of Water-Load Distributions Obtained during Seaplane Landings with Bureau of Aeronautics Specifications. TED No. NACA 2413

Science.gov (United States)

Smiley, Robert F.; Haines, Gilbert A.

1949-01-01

Bureau of Aeronautics Design Specifications SS-IC-2 for water loads in sheltered water are compared with experimental water loads obtained during a full--scale landing investigation. This investigation was conducted with a JRS-1 flying boat which has a 20 degrees dead-rise V-bottom with a partial chine flare. The range of landing conditions included airspeeds between 88 and 126 feet per second, sinking speeds between 1.6 and 9.1 feet per second, flight angles less than 6 degrees, and trims between 2 degrees and 12 degrees. Landings were moderate and were made in calm water. Measurements were obtained of maximum over-all loads, maximum pitching moments, and pressure distributions. Maximum experimental loads include over-all load factors of 2g, moments of 128,000 pound-feet, and maximum local pressures greater than 40 pounds per square inch. Experimental over-all loads are approximately one-half the design values, while local pressures are of the same order as or larger than pressures calculated from specifications for plating, stringer, floor, and frame design. The value of this comparison is limited, to some extent, by the moderate conditions of the test and by the necessary simplifying assumptions used in comparing the specifications with the experimental loads.

Preliminary Tests in the NACA Tank to Investigate the Fundamental Characteristics of Hydrofoils

Science.gov (United States)

Ward, Kenneth E.; Land, Norman S.

1940-01-01

This preliminary investigation was made to study the hydrodynamic properties and general behavior of simple hydrofoils. Six 5- by 30-inch plain, rectangular hydrofoils were tested in the NACA tank at various speeds, angles of attack and depths below the water surface. Two of the hydrofoils had sections representing the sections of commonly used airfoils, one had a section similar to one developed Guidoni for use with hydrofoil-equipped seaplane floats, and three had sections designed to have constant chordwise pressure distributions at given values of the lift coefficient for the purpose of delaying the speed at which cavitation begins. The experimental results are presented as curves of the lift and drag coefficients plotted against speed for the various angles of attack and depths for which the hydrofoils were tested. A number of derived curves are included for the purpose of better comparing the characteristics of the hydrofoils and to show the effects of depth. Several representative photographs show the development of cavitation on the the upper surface of the hydrofoils. The results indicate that properly designed hydrofoil sections will have excellent characteristics and that the speed at which cavitation occurs may be delayed to an appreciable extent by the use of suitable sections.

The Response of a Branch of Puget Sound, Washington to the 2014 North Pacific Warm Anomaly

Science.gov (United States)

Mickett, J.; Newton, J.; Devol, A.; Krembs, C.; Ruef, W.

2016-02-01

The flow of the unprecedentedly-warm upper-ocean North Pacific "Blob" water into Puget Sound, Washington, caused local extreme water property anomalies that extended from the arrival of the water inshore in the fall of 2014 through 2015. Here we report on moored and seaplane observations from Hood Canal, a branch of Puget Sound, where temperature was more than 2σ above climatology for much of the year with maximum temperature anomalies at depth and at the surface +2.5 °C and +7 °C respectively. The low density of the oceanic warm "Blob" water resulted in weak deep water flushing in Hood Canal in the fall of 2014, which combined with a lack of wintertime flushing to result in anomalously-low dissolved oxygen (DO) concentrations at depth. Late-summer 2015 DO values were the lowest in a decade of mooring observations and more than 2σ below climatology. The anomalously low density of the deep basin water allowed a very early onset of the annually-occurring, late-summer intrusion, which first entered Hood Canal at the end of July compared to the usual arrival in early to mid-September. In late August this intrusion conspired with an early fall storm to lift the very low DO deep water to surface at the south end of Hood Canal, causing a significant fish kill event.

Resistance and Spray Characteristics of a 1/13-Scale Model of the Consolidated Vultee Skate 7 Seaplane, TED No. NACA DE 338

Science.gov (United States)

McKann, Robert E.; Coffee, Claude W.; Arabian, Donald D.

1949-01-01

A model of a Consolidated Vultee Aircraft Corporation Skate 7 sea-plane:was tested in Langley tank no= 2. Resistance data, 'spray photographs, and underwater photographs,are given in this report without discussion.

Survey on the novel hybrid aquatic-aerial amphibious aircraft: Aquatic unmanned aerial vehicle (AquaUAV)

Science.gov (United States)

Yang, Xingbang; Wang, Tianmiao; Liang, Jianhong; Yao, Guocai; Liu, Miao

2015-04-01

The aquatic unmanned aerial vehicle (AquaUAV), a kind of vehicle that can operate both in the air and the water, has been regarded as a new breakthrough to broaden the application scenario of UAV. Wide application prospects in military and civil field are more than bright, therefore many institutions have focused on the development of such a vehicle. However, due to the significant difference of the physical properties between the air and the water, it is rather difficult to design a fully-featured AquaUAV. Until now, majority of partially-featured AquaUAVs have been developed and used to verify the feasibility of an aquatic-aerial vehicle. In the present work, we classify the current partially-featured AquaUAV into three categories from the scope of the whole UAV field, i.e., the seaplane UAV, the submarine-launched UAV, and the submersible UAV. Then the recent advancements and common characteristics of the three kinds of AquaUAVs are reviewed in detail respectively. Then the applications of bionics in the design of AquaUAV, the transition mode between the air and the water, the morphing wing structure for air-water adaptation, and the power source and the propulsion type are summarized and discussed. The tradeoff analyses for different transition methods between the air and the water are presented. Furthermore, it indicates that applying the bionics into the design and development of the AquaUAV will be essential and significant. Finally, the significant technical challenges for the AquaUAV to change from a conception to a practical prototype are indicated.

Nüüdisaeg ja ajaloo ingel Tallinna Lennusadamas = The "Now-Time" and the angel of history in the Tallinn Seaplane Harbour / Carl-Dag Lige

Index Scriptorium Estoniae

Lige, Carl-Dag, 1982-

2012-01-01

Tallinna Lennusadama vesilennukite angaaridest, nende arhitektuurist, Eesti Meremuuseumi uuest ekspositsioonist. Projekt ja ekspositsiooni kujundus: KOKO Arhitektid. Raudbetoonkonstruktsioonide renoveerimisprojekt: Karl Õiger ja Heiki Onton, uued konstruktsioonid: Neoprojekt. Projekt: 2009-2010, ehitus 2010-2012

WASS: An open-source pipeline for 3D stereo reconstruction of ocean waves

Science.gov (United States)

Bergamasco, Filippo; Torsello, Andrea; Sclavo, Mauro; Barbariol, Francesco; Benetazzo, Alvise

2017-10-01

Stereo 3D reconstruction of ocean waves is gaining more and more popularity in the oceanographic community and industry. Indeed, recent advances of both computer vision algorithms and computer processing power now allow the study of the spatio-temporal wave field with unprecedented accuracy, especially at small scales. Even if simple in theory, multiple details are difficult to be mastered for a practitioner, so that the implementation of a sea-waves 3D reconstruction pipeline is in general considered a complex task. For instance, camera calibration, reliable stereo feature matching and mean sea-plane estimation are all factors for which a well designed implementation can make the difference to obtain valuable results. For this reason, we believe that the open availability of a well tested software package that automates the reconstruction process from stereo images to a 3D point cloud would be a valuable addition for future researches in this area. We present WASS (http://www.dais.unive.it/wass), an Open-Source stereo processing pipeline for sea waves 3D reconstruction. Our tool completely automates all the steps required to estimate dense point clouds from stereo images. Namely, it computes the extrinsic parameters of the stereo rig so that no delicate calibration has to be performed on the field. It implements a fast 3D dense stereo reconstruction procedure based on the consolidated OpenCV library and, lastly, it includes set of filtering techniques both on the disparity map and the produced point cloud to remove the vast majority of erroneous points that can naturally arise while analyzing the optically complex nature of the water surface. In this paper, we describe the architecture of WASS and the internal algorithms involved. The pipeline workflow is shown step-by-step and demonstrated on real datasets acquired at sea.

WASS: an open-source stereo processing pipeline for sea waves 3D reconstruction

Science.gov (United States)

Bergamasco, Filippo; Benetazzo, Alvise; Torsello, Andrea; Barbariol, Francesco; Carniel, Sandro; Sclavo, Mauro

2017-04-01

Stereo 3D reconstruction of ocean waves is gaining more and more popularity in the oceanographic community. In fact, recent advances of both computer vision algorithms and CPU processing power can now allow the study of the spatio-temporal wave fields with unprecedented accuracy, especially at small scales. Even if simple in theory, multiple details are difficult to be mastered for a practitioner so that the implementation of a 3D reconstruction pipeline is in general considered a complex task. For instance, camera calibration, reliable stereo feature matching and mean sea-plane estimation are all factors for which a well designed implementation can make the difference to obtain valuable results. For this reason, we believe that the open availability of a well-tested software package that automates the steps from stereo images to a 3D point cloud would be a valuable addition for future researches in this area. We present WASS, a completely Open-Source stereo processing pipeline for sea waves 3D reconstruction, available at http://www.dais.unive.it/wass/. Our tool completely automates the recovery of dense point clouds from stereo images by providing three main functionalities. First, WASS can automatically recover the extrinsic parameters of the stereo rig (up to scale) so that no delicate calibration has to be performed on the field. Second, WASS implements a fast 3D dense stereo reconstruction procedure so that an accurate 3D point cloud can be computed from each stereo pair. We rely on the well-consolidated OpenCV library both for the image stereo rectification and disparity map recovery. Lastly, a set of 2D and 3D filtering techniques both on the disparity map and the produced point cloud are implemented to remove the vast majority of erroneous points that can naturally arise while analyzing the optically complex nature of the water surface (examples are sun-glares, large white-capped areas, fog and water areosol, etc). Developed to be as fast as possible, WASS