12 research outputs found
Initial Flight Test of the NACA FR-1-A, a Low-acceleration Rocket- Propelled Vehicle for Transonic Flutter Research
Flight and Wind-tunnel Investigation to Determine the Aileron-vibration Characteristics of 1/4-scale Wing Panels of the Douglas D-558-2 Research Airplane
Determination of longitudinal stability of the BELL X-1 airplane from transient responses at Mach numbers up to 1.12 at lift coefficients of 0.3 and 0.6
Longitudinal frequency-response characteristics of the Douglas D-558-I airplane as determined from experimental transient-response histories to Mach number of 0.90
Flight Test of NACA FR-1-B, a Low Acceleration Rocket-propelled Vehicle for Transonic Flutter Research
Transonic-flutter Investigation of Wings Attached to Two Low-acceleration Rocket-propelled Vehicles
Two low-acceleration transonic-flutter vehicles were launched and flown. The first carried two test wings, one of which fluttered at M = 0.92 at a frequency of 61.4 cycles per second. The reference flutter speed determined from two-dimensional theory for an unswept wing in incompressible flow is conservative when compared to the experimental flutter speed. The second vehicle carried two test wings, one of which failed at M = 0.71 because of low-frequency divergent oscillation. Since this failure was not caused by conventional flexure-torsion flutter, no comparison with a reference flutter speed can be made
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NACA Research Memorandums
Report presenting testing on the first of a series of flutter rockets, designated the NACA FR-1-A, which was tested with two identical swept wings. Results regarding the launching, flight, and wing failure are provided
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NACA Research Memorandums
Report presenting an analysis of a number of free-flight transient responses resulting from small stabilizer movements obtained during testing of the Bell X-1 airplane to obtain its longitudinal stability characteristics. A comparison of flight data and model test data is also provided
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NACA Research Memorandums
Report presenting a flight and wind-tunnel investigation to determine the aerodynamic vibration characteristics of ailerons for the Douglas D-558-2 airplane. Testing was conducted to investigate the possibilities of a single-degree-of-freedom flutter known as aileron "buzz" or aileron compressibility flutter. Results regarding the three types of aileron vibration observed and vibration amplitudes are provided
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NACA Research Memorandums
Report presenting information regarding transient oscillations observed in response to elevator pulses of the Douglas D-558-I airplane at a range of Mach numbers and altitudes. An application of the Fourier transform was used to obtain the frequency-response characteristics. The effects of lift coefficient on the frequency response are also included