Comparison Of Low Lift Drag At Mach Numbers From 0 74 To 1 37 Of Rocket Boosted Models Having Externally Braced Wings And Cantilever Wings

Comparison of Low-lift Drag at Mach Numbers from 0.74 to 1.37 of Rocket-boosted Models Having Externally Braced Wings and Cantilever Wings

An investigation has been conducted to determine whether the low-lift drag of a rocket-model airplane-like configuration could be reduced at transonic and low supersonic Mach numbers by reducing the wing thickness while external braces were used to provide the necessary bending strength. The investigation consisted of flight training two rocket models having aspect ratio 3.04, unswept braced tapered wings mounted on fuselages with the same fineness ratios and cross-sectional area distributions. Data collected from the flight test of a model having a thicker cantilever wing of the same plan form were compared with data collected in this investigation.

Free-flight Measurements of the Zero-lift Drag of Several Wings at Mach Numbers from 1.4 to 3.8

Effects of Inlet Modification and Rocket-Rack Extension on the Longitudinal Trim and Low-Lift Drag of the Douglas F5d-1 Airplane As Obtained with A 0

A flight investigation was conducted to determine the effects of an inlet modification and rocket-rack extension on the longitudinal trim and low-lift drag of the Douglas F5D-1 airplane. The investigation was conducted with a 0.125-scale rocket-boosted model which was flight tested at the Langley Pilotless Aircraft Research Station at Wallops Island, Va. Results indicate that the combined effects of the modified inlet and fully extended rocket racks on the trim lift coefficient and trim angle of attack were small between Mach numbers of 0.94 and 1.57. Between Mach numbers of 1.10 and 1.57 there was an average increase in drag coefficient of about o,005 for the model with modified inlet and extended rocket racks. The change in drag coefficient due to the inlet modification alone is small between Mach numbers of 1.59 and 1.64