Persistent Link:
http://hdl.handle.net/10150/606405
Title:
Multichannel, Free-Flight Base Pressure Telemetry in Wind Tunnels
Author:
Choate, R. H.
Affiliation:
ARO, Inc.
Issue Date:
1967-10
Rights:
Copyright © International Foundation for Telemetering
Collection Information:
Proceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.
Publisher:
International Foundation for Telemetering
Journal:
International Telemetering Conference Proceedings
Abstract:
Radio telemetry techniques permit the acquisition of aerodynamic data from free-flight models in wind tunnels, a method which ensures that the data are completely free from support interference effects. No serious difficulties were experienced in the development of a telemetry system to record simultaneously four channels of base pressure data from a free-flight model; however, precautions were necessary to prevent interactions between channels and to prevent interference between telemetered and extraneous signals. This telemetry system is based upon small, transistorized, transmitter units, placed aboard the model, which are directly modulated (FM) by capacitance-type pressure transducers. All units are powered from a single battery package. These units, one for each data channel, transmit to antennas located outside the tunnel. All units are interchangeable between models, and have built-in provisions for preselecting full-scale pressure range (0.0005-0.1 psid) to provide optimum data resolution under a variety of test conditions in three different wind tunnels (at nominal Mach numbers of 8, 10, and 20). Oscillograph traces resulting from tests of typical models, both in free flight and on a sting mount, are compared and discussed from an instrumentation point of view. Satisfactory system operation is demonstrated by comparing telemetered base pressure data to data obtained by conventional means during a test of a sting-mounted model.
Sponsors:
International Foundation for Telemetering
ISSN:
0884-5123; 0074-9079
Additional Links:
http://www.telemetry.org/

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titleMultichannel, Free-Flight Base Pressure Telemetry in Wind Tunnelsen_US
dc.contributor.authorChoate, R. H.en
dc.contributor.departmentARO, Inc.en
dc.date.issued1967-10en
dc.rightsCopyright © International Foundation for Telemeteringen
dc.description.collectioninformationProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.en
dc.publisherInternational Foundation for Telemeteringen
dc.description.abstractRadio telemetry techniques permit the acquisition of aerodynamic data from free-flight models in wind tunnels, a method which ensures that the data are completely free from support interference effects. No serious difficulties were experienced in the development of a telemetry system to record simultaneously four channels of base pressure data from a free-flight model; however, precautions were necessary to prevent interactions between channels and to prevent interference between telemetered and extraneous signals. This telemetry system is based upon small, transistorized, transmitter units, placed aboard the model, which are directly modulated (FM) by capacitance-type pressure transducers. All units are powered from a single battery package. These units, one for each data channel, transmit to antennas located outside the tunnel. All units are interchangeable between models, and have built-in provisions for preselecting full-scale pressure range (0.0005-0.1 psid) to provide optimum data resolution under a variety of test conditions in three different wind tunnels (at nominal Mach numbers of 8, 10, and 20). Oscillograph traces resulting from tests of typical models, both in free flight and on a sting mount, are compared and discussed from an instrumentation point of view. Satisfactory system operation is demonstrated by comparing telemetered base pressure data to data obtained by conventional means during a test of a sting-mounted model.en
dc.description.sponsorshipInternational Foundation for Telemeteringen
dc.identifier.issn0884-5123en
dc.identifier.issn0074-9079en
dc.identifier.urihttp://hdl.handle.net/10150/606405en
dc.identifier.journalInternational Telemetering Conference Proceedingsen
dc.typetexten
dc.typeProceedingsen
dc.relation.urlhttp://www.telemetry.org/en
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