Last edited by Meztinris
Monday, August 3, 2020 | History

3 edition of Optical measurement of propeller blade deflections found in the catalog.

Optical measurement of propeller blade deflections

Optical measurement of propeller blade deflections

  • 99 Want to read
  • 14 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service in [Washington, D.C.], Springfield, Va .
Written in English

    Subjects:
  • Propellers, Aerial.,
  • Optical measurements.,
  • Deflection.,
  • Displacement measurement.,
  • Optical measurement.,
  • Propeller blades.

  • Edition Notes

    StatementAnatole P. Kurkov.
    SeriesNASA technical paper -- 2841.
    ContributionsUnited States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL16116598M

    In aeronautics, a propeller, also called an airscrew, converts rotary motion from an engine or other power source into a swirling slipstream which pushes the propeller forwards or backwards. It comprises a rotating power-driven hub, to which are attached several radial airfoil-section blades such that the whole assembly rotates about a longitudinal axis. Define propeller blade. propeller blade synonyms, propeller blade pronunciation, propeller blade translation, English dictionary definition of propeller blade. n. 1. The flat cutting part of a sharpened weapon or tool. 2. a. A sword. b. A swordsman. 3. Archaeology A .

    It is Blade Deflection Measurement System. Blade Deflection Measurement System listed as BDMS. Blade Deflection Measurement System - How is Blade Deflection Measurement System abbreviated? Book and Digital Media Studies (various universities Blade Deflection Measurement System; BLADE-GT; BLADES; BLADING; BLAF; BLAFC; BLAG; BLAGG; BLAGS. In case you want to know at what angle does the blade 'see' the incoming wind, you first choose an station of the prop, say at 70% of the prop radius, measured from the axis. If the prop has a radius of 1,2 meters, that station is at a distance 1,2 x 0,7 = 0,84 meters from the axis.

    Mahr GmbH Carl-Mahr-Str. 1 Göttingen, Germany Tel.: +49 [email protected] The propeller governor of the master engine is set to the desired RPM. A signal from the master engine governor is sent to the control box which sends a signal to a stepping motor. The motor adjusts the propeller governor and fuel control of the slave engine causing it to maintain exactly the same RPM as the master engine.


Share this book
You might also like
Spreadsheets and valuation

Spreadsheets and valuation

Constitution and by-laws of the Native Village of Tatitlek

Constitution and by-laws of the Native Village of Tatitlek

Reconsidering feminist research in educational leadership

Reconsidering feminist research in educational leadership

Salmonid broodstock maturation

Salmonid broodstock maturation

On the road

On the road

Dangerous Interlude

Dangerous Interlude

Anasazi mobility and Mesa Verde Migrations

Anasazi mobility and Mesa Verde Migrations

Cookes-Portsmouth United Church : marriages, 1858-1976

Cookes-Portsmouth United Church : marriages, 1858-1976

Interdepartmental seminar papers

Interdepartmental seminar papers

Tax and transfer tensions

Tax and transfer tensions

Illustrated lyrics 2.

Illustrated lyrics 2.

Road log and guide

Road log and guide

The Apocalypse of St. John

The Apocalypse of St. John

Optical measurement of propeller blade deflections Download PDF EPUB FB2

Optical measurement of propeller blade deflections. Washington, DC: National Aeronautics and Space Administration, Scientific and Technical Information Division ; [Springfield, Va.]: [For sale by the National Technical Information Service], (OCoLC) Microfiche: Kurkov, Anatole P.

Optical measurement of propeller blade deflections. Optical measurement of propeller blade deflections. Washington, DC: National Aeronautics and Space Administration, Scientific and Technical Information Division, September (OCoLC) A nonintrusive optical method for measuring unducted fan (or propeller) blade deflections is described and evaluated.

The measurement does not depend on blade surface reflectivity. Deflection of a point at the leading edge and a point at the trailing edge in a plane nearly perpendicular to the pitch axis is obtained with a single light beam Author: Anatole P. Kurkov. A system for accurate real-time measurement of deflections was developed.

A stable laser source is, by means of a single-mode fiber, coupled to an optical head located at one end of deformed structure. A detector circuit with a quadrant detector and processing electronics, located at the other end of the structure, communicates the resolved 2D Cited by: 4.

Optical measurement of propeller blade deflections / (Washington, DC: National Aeronautics and Space Administration, Scientific and Technical Information Division ; [Springfield, Va.: For sale by the National Technical Information Service], ), by Anatole P.

Kurkov and United States. deflections of one of the blades of the propeller are measured by tracking the displacements from a reference condition of a set of markers placed on the blade surface. The most natural choice for the reference condition is the Optical measurement of propeller blade deflections book not subjected to any load (i.e.

the propeller is at complete rest). The book is intended for both industrial and academic scientists and engineers, and will be useful for undergraduate and postgraduate studies. Optical measurement of propeller blade. Measurement and Modeling of Multicopter UAS Rotor Blade Deflections in Hover.

Nathalie Nowicki KTH Royal Institute of Technology Ames Research Center, Moffett Field, California. National Aeronautics and Space Administration. Ames Research Center Moffett Field, CA June File Size: 4MB. propeller and helicopter rotor deformation measurements.

Other optical measurement techniques e.g. like 3D DIC [4] and Moiré techniques [5] have also been successfully applied to rotor measurements, but also with stationary cameras and with a recording of the fast passing blades.

Since the knowledge of blade deformation and movement. mission- and aircraft-specific propellers for small unmanned aerial vehicles. This objective was met by creating a computer program to design a propeller that meets user-defined aircraft performance requirements within the limitations of the motor, material, and manufacturing methods.

The use of additive manufacturing (3D printing) in makingCited by: 2. This approach uses working point dependent blade deflections. These blade deflections are often in the range of micrometers and so the complete measurement system has to be very precise.

A Study on the Effect of V-Ring Position on the Die Roll Height in Fine Blanking for Special Automobile Seat Recliner Gear pCited by: 7. Step 4: Change the propeller with different characteristics (diameter, pitch, and blade number) and redo step 3.

Test 2 - Effect of Wind Shield under Propeller Step 1: Assemble the wind shield with no piece on it. Step 2: Install the propeller and check whether the propeller is well Size: 2MB.

On a leveled surface, make a layout of: a center point, a circle with a diameter equal to the larger propeller hub diameter, and a circle with an approximate diameter that pass through the widest part of the blade to be measured. Put the propeller with the pitch side up, and center it with the larger diameter previously layout.

propeller blades,- Still another cause of propeller vibra-tions, and probably the most important one, is their pro-duction by 'nequal impact of the blades, due to an uneven field of flow, such as always 'exists for a propeller re-volving near the airplane.

Cited by: 1. a ground-loads calibration. As in-flight deflection measurement techniques develop and become easier to apply, DBLE will become more advantageous. Similar Research and Techniques The process of using optical methods to measure load in ground studies has been performed at the NASA Langley Research Center (Hampton, Virginia).Cited by: 6.

Propeller Geometry: General Features Reference Figure for the following terms. TERM DEFINITION 1. Diameter The diameter of the imaginary circle scribed by the blade tips as the propeller rotates.

Radius The distance from the axis of rotation to the blade tip. The radius multiplied by two is equal to the diameter. Size: KB. Biconvex blade section obtained by streamline tracing for current PBD code. 17 Blade, hub and duct representation in PBD for Ka propulsor 19 Vortex lattice discretization of a propeller geometry where the symbols represent control points and s1 and S2 are orthogonal vectors on the blade surface were attached on the blade surface to measure the structural loads and the elastic deflections of the blade.

An alternative measurement technique by an optical method was also performed to validate the blade elastic pressure and strain gauge. By using Optical Precision Measurement (OPM) MMG guarantees the highest design accuracy in all dimensions.

The propeller is scanned with an accuracy of up to 1/ mm – from the cast blank to the final grinding – using fringe pattern projection and an optical sensor. Reported here is a design study of a propeller for a vehicle capable of subsonic flight in Earth’s stratosphere.

All propellers presented were required to absorb kW (85 hp) at km (85, ft) while aircraft cruise velocity was maintained at Mach To produce the final design, classic momentum and blade-element theoriesCited by: 7.true airspeeds and high blade Mach numbers of high altitude flight.

A conceptual propeller was designed and its performance analysed within a time-stepped mission simulation code.

Wind tunnel tests were carried out on a scaled model of the propeller Thrust measurement 65 Fairing geometry 66 Torque Measurements 68 File Size: 3MB. It is the ratio of the total area of the blades, divided by the total area of the propeller. The blade area of each blade can be measured different ways, but most of the time they are similar.

The area of the propeller is the area of the circle.