Engineering topics

Kachadourian, G.

Publications and source records attributed to Kachadourian, G..

16 records

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur Launch Vehicle flights. Volume 1: Acoustics data

The payloads carried by the first four Titan Centaur launch vehicle flights were, a Viking spacecraft dynamic simulator, the Helios A spacecraft, and the two Viking spacecraft. Dynamic loads data were accumulated from these four flights for application to the Viking spacecraft. The accoustics data include time histories and spectral analysis plots of accoustic pressure measurements made in the Centaur and payload compartment during launch flight. Summary plots are presented to show composite spectra for liftoff and Mach 1/Max Q periods of flight.

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur launch vehicle flights. Volume 2, part 1: Vibration power spectral density analysis of launch and max Q flight

Summary plots are presented for the time histories and power spectral density analyses of vibration and acceleration on the spacecraft from the Titan Centaur launchings carrying the Viking dynamic simulator and the two Viking spacecraft (TC-1, TC-3 and TC-4).

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur launch vehicle flights. Volume 2, part 2: Vibration power spectral density analysis of launch and max Q flight

Power spectral density plots and associated time history plots are presented for the Titan-Centaur launch carrying the Viking dynamic simulator.

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur launch vehicle flights. Volume 2, part 3: Vibration power spectral density analysis of launch and max Q flight

Power spectral density plots and associated time history plots are presented for the Titan-Centaur launch carrying the Viking A spacecraft.

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur launch vehicle flights. Volume 2, part 4: Vibration power spectral density analysis of launch and max Q flight

Power spectral density plots and associated time history plots are presented for the Titan-Centaur launch carrying the Viking B spacecraft.

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur Launch Vehicle flights. Volume 3, part 1: Shock spectra of transients

Time histories and shock-spectra of vibration and acceleration were obtained during the TC-1, TC-4 and TC-3 launch and staging events. Summary plots are presented and comparisons to Viking Program midfrequency sine test requirements are made.

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur Launch Vehicle flights. Volume 3, part 2: Shock spectra of transients

Shock spectra are presented for the TC-1 (Viking dynamic simulator) flight.

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur Launch Vehicle flights. Volume 3, part 3: Shock spectra of transients

Shock spectra are presented for the TC-4 (Viking A Spacecraft) flight.

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur launch vehicle flights. Volume 3, part 4: Shock spectra of transients

Shock spectra are presented for the TC-3 (Viking B Spacecraft) flight.

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur Launch Vehicle flights. Volume 4, part 1: Titan Stage 1 and Centaur First Burn oscillations

Time history and PSD data are presented showing the character of the first longitudinal mode oscillation which occurred during the Centaur first burn of the TC-4 and TC-3 flights.

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur Launch Vehicle flights. Volume 4, part 2: Titan Stage 1 and Centaur First Burn oscillations

Power spectral density plots of vibration and strain data are presented for the Titan stage 1 burn and the Centaur main engine first burn of the TC-4 flight (Viking A spacecraft).

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur Launch Vehicle flights. Volume 4, part 3: Titan Stage 1 and Centaur First Burn oscillations

Power spectral density plots of vibration and strain data are presented for the Titan stage 1 burn and the Centaur main engine first burn of the TC-3 flight (Viking B spacecraft).

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur launch vehicle flights. Volume 5, part 1: Time history plots

Extended time history plots are presented for the TC-1, TC-3, and TC-4 flights. Vibration, strain, acceleration, force, and moment data are included.

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur launch vehicle flights. Volume 5, part 2: Time history plots

For abstract, see N77-28193.

Kachadourian, G.↗

NASA NTRS1977

A compilation of spacecraft loads data from four Titan Centaur launch vehicle flights. Volume 5, part 3: Time history plots

For abstract, see N77-28193.

Kachadourian, G.↗

NASA NTRS1975

Flight Flutter Testing of the P6M

On the P6M the shake behavior, i.e., the response to random excitation at subcritical speeds of lowly damped airplane modes, is as important as the actual flutter speed. The approach is to first study the problem by means of analyses and wind-tunnel tests. These predictions are compared with flight test data obtained by spectral analysis of tape recordings of the airplane vibration responses to random aerodynamic turbulence. A similar spectrum analysis approach was used in high speed wind-tunnel tests. A resonance excitation technique was developed for low speed wind-tunnel testing, and well defined V-g curves were obtained. The effect of various parameters on both shake and flutter of T-tails with and without dihedral were studied. Preliminary flight tests yielded good correlation; they also yielded interesting information concerning a low frequency transonic snaking mode, and excitation by shed vortices.

Kachadourian, G.↗