Skip Top nav bar link group topnav end piece go to business section go to education section go to history section go to gallery section go to news section go to organizations section go to research section go to search engine go to site index topnav end piece
NASA Meatball NASA Dryden PA-30 Twin Comanche Movies banner
PA-30 Twin Comanche

PA-30 Twin Comanche Tail Flutter Test

Movie Number   EM-0098-01
Movie Date   April 5 1966
Formats   160x120 QuickTime Movie ( .8 MB)
320x240 QuickTime Movie (1.6 MB)
480x360 QuickTime Movie (2.5 MB)
640x480 QuickTime Movie (4.2 MB)
PA-30 Twin Comanche Still photos of this aircraft are available in several resolutions at
http://www.nasa.gov/centers/dryden/multimedia/imagegallery/PA-30/index.html
Description  

This 23 second video clip shows the PA-30 Twin Comanche during a tail flutter test

After being purchased in 1967, NASA 808 was used as a testbed for general aviation flight control research. NASA's first project with the aircraft was the determination of its stability and control characterisitics in the Langley full-scale wind tunnel. The wind tunnel measurements were then correlated with in-flight measurements of the stability and control characteristics at Dryden. This was the first time full-scale wind tunnel measurements of a general aviation aircraft had been made since the late 1930s. As a result of the studies, several changes were made by the contractor to the aircraft to improve its flying qualities. These changes are manifested in later models of the airplane.

Another project involving general aviation was the PA-30 program to define the operating techniques necessary to enable curved landing approaches as a part of routine operation at major airports. The program, in support of NASA's Short Take Off and Landing (STOL) project, was designed to facilitate large and small, STOL and conventional aircraft using the same runway.

In the early 1970s, the PA-30, serial number 30-1498, was used to test a flight technique used to fly Remotely Piloted Research Vehicles (RPRV's). The technique was first tested with the cockpit windows of the light aircraft blacked out while the pilot flew the aircraft utilizing a television monitor which gave him a "pilot's eye" view ahead of the aircraft. Later pilots flew the aircraft from a ground cockpit, a procedure used with all RPRV's. TV and two-way telemetry allow the pilot to be in constant control of the aircraft. The apparatus mounted over the cockpit is a special fish eye lens camera, used to obtain images that are transmitted to the ground based cockpit. This project paved the way for sophisticated, highly successful research programs involving high risk spin, stall, and flight control conditions, such as the HiMAT and the subscale F-15 remotely piloted vehicles.

Over the years, NASA 808 has also been used for spin and stall research related to general aviation aircraft and also research to alleviate wake vortices behind large jetliners.

In November 1973, the PA-30 and an F-104 were used to measure the force and effects of wake vortices behind large aircraft using a three engine B-727. Smoke generators were placed on the 727 and the smaller aircraft followed to measure the vortices. This program directly influenced the later wake vortex tests on NASA's 747 using a T-37B and a Learjet as chase aircraft, which led to successful means of alleviating dangerous vortices.

Keywords   PA-30 Twin Comanche aircraft at Dryden, Advanced Concept Technology Demonstration, NASA's Airborne Science Program research missions
Skip bottom nav bar link group Business | Education | History | Gallery | News Room | Organizations | Research | Search | Site Index

   Last Modified: April 8, 2008
   Responsible NASA Official: Marty Curry
   Curator: PAO Webmasters

   NASA Website Privacy Statement