{"id":{"repo_id":"salford","oai_identifier":"oai:salford-repository.worktribe.com:1389768"},"canonical_url":"https://search.dev.ndltd.org/etd/salford/oai:salford-repository.worktribe.com:1389768","repository":{"repo_id":"salford","name":"U. of Salford","base_url":"https://salford-repository.worktribe.com/oaiprovider"},"display":{"title":"An investigation of the aerodynamics of racing motorcycles","abstract":"The purpose of this thesis is to present a study onmotorcycle aerodynamics with particular regard to theperformance characteristics of faired and unfaired types inuse today for road racing and speed record attempts. Toachieve this, a wind tunnel procedure for the testing ofscale models was developed with emphasis on the problems involved in obtaining valid data from large model-to-tunnel area blockage ratios, (approximately 15'%).Following a review of the results, which included six aerodynamic force and moment coefficients and theirvariation with Reynolds number and yaw angle, a programme of drag reduction was pursued which approached the problem from two directions: firstly, by using simple bolt-on devices for conventional fairings, designed so as to obviate the need for major machine modifications and secondly, by a complete redesign of the motorcycle.� The latter involved the use of more efficient aerodynamic shapes and also achieved a reduction in frontal area without compromising rider comfort.The final result was a machine which would providegreatly enhanced racing performance through a dragreduction of approximately 40% and also lend itself to theincorporation of radical primary and secondary safetyfeatures, beneficial both an the track and public roads.Preliminary studies into a computational flow simulationas a first stage to the full prediction of fairing pressuredistribution are also included. The techniques exploredattempted to retain a reasonable accuracy of result withoutrecourse to excessive computer power or complicatedcalculations. This was achieved successfully with thesimple models considered, despite the highly separated nature of the simulated flow.","abstract_html":"The purpose of this thesis is to present a study onmotorcycle aerodynamics with particular regard to theperformance characteristics of faired and unfaired types inuse today for road racing and speed record attempts. Toachieve this, a wind tunnel procedure for the testing ofscale models was developed with emphasis on the problems involved in obtaining valid data from large model-to-tunnel area blockage ratios, (approximately 15'%).Following a review of the results, which included six aerodynamic force and moment coefficients and theirvariation with Reynolds number and yaw angle, a programme of drag reduction was pursued which approached the problem from two directions: firstly, by using simple bolt-on devices for conventional fairings, designed so as to obviate the need for major machine modifications and secondly, by a complete redesign of the motorcycle.� The latter involved the use of more efficient aerodynamic shapes and also achieved a reduction in frontal area without compromising rider comfort.The final result was a machine which would providegreatly enhanced racing performance through a dragreduction of approximately 40% and also lend itself to theincorporation of radical primary and secondary safetyfeatures, beneficial both an the track and public roads.Preliminary studies into a computational flow simulationas a first stage to the full prediction of fairing pressuredistribution are also included. The techniques exploredattempted to retain a reasonable accuracy of result withoutrecourse to excessive computer power or complicatedcalculations. This was achieved successfully with thesimple models considered, despite the highly separated nature of the simulated flow.","abstract_has_math":false,"creators":["Ellery, MK"],"institution":null,"degree_name":null,"degree_level":"Doctoral (Level 8)","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1985,"date_issued":"1985","date_published":"1985","updated_at":"2026-07-24T04:26:35Z","subjects":[],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["oai:salford-repository.worktribe.com:1389768"],"render_values":[{"text":"oai:salford-repository.worktribe.com:1389768","href":null,"code":true}]}]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.sponsor","label":"Sponsor","values":["University of Salford"]},{"key":"dc:creator","label":"Author","values":["Ellery, MK"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1985-04-01"]},{"key":"dc:date.issued","label":"Date","values":["1985"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://salford-repository.worktribe.com/output/1389768"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Doctoral (Level 8)"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["oai:salford-repository.worktribe.com:1389768"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The purpose of this thesis is to present a study onmotorcycle aerodynamics with particular regard to theperformance characteristics of faired and unfaired types inuse today for road racing and speed record attempts. Toachieve this, a wind tunnel procedure for the testing ofscale models was developed with emphasis on the problems involved in obtaining valid data from large model-to-tunnel area blockage ratios, (approximately 15'%).Following a review of the results, which included six aerodynamic force and moment coefficients and theirvariation with Reynolds number and yaw angle, a programme of drag reduction was pursued which approached the problem from two directions: firstly, by using simple bolt-on devices for conventional fairings, designed so as to obviate the need for major machine modifications and secondly, by a complete redesign of the motorcycle.� The latter involved the use of more efficient aerodynamic shapes and also achieved a reduction in frontal area without compromising rider comfort.The final result was a machine which would providegreatly enhanced racing performance through a dragreduction of approximately 40% and also lend itself to theincorporation of radical primary and secondary safetyfeatures, beneficial both an the track and public roads.Preliminary studies into a computational flow simulationas a first stage to the full prediction of fairing pressuredistribution are also included. The techniques exploredattempted to retain a reasonable accuracy of result withoutrecourse to excessive computer power or complicatedcalculations. This was achieved successfully with thesimple models considered, despite the highly separated nature of the simulated flow."]},{"key":"dc:title","label":"Title","values":["An investigation of the aerodynamics of racing motorcycles"]}]}],"canonical_facts":{"dc:contributor.sponsor":["University of Salford"],"dc:creator":["Ellery, MK"],"dc:date":["1985-04-01"],"dc:date.issued":["1985"],"dc:description.abstract":["The purpose of this thesis is to present a study onmotorcycle aerodynamics with particular regard to theperformance characteristics of faired and unfaired types inuse today for road racing and speed record attempts. Toachieve this, a wind tunnel procedure for the testing ofscale models was developed with emphasis on the problems involved in obtaining valid data from large model-to-tunnel area blockage ratios, (approximately 15'%).Following a review of the results, which included six aerodynamic force and moment coefficients and theirvariation with Reynolds number and yaw angle, a programme of drag reduction was pursued which approached the problem from two directions: firstly, by using simple bolt-on devices for conventional fairings, designed so as to obviate the need for major machine modifications and secondly, by a complete redesign of the motorcycle.� The latter involved the use of more efficient aerodynamic shapes and also achieved a reduction in frontal area without compromising rider comfort.The final result was a machine which would providegreatly enhanced racing performance through a dragreduction of approximately 40% and also lend itself to theincorporation of radical primary and secondary safetyfeatures, beneficial both an the track and public roads.Preliminary studies into a computational flow simulationas a first stage to the full prediction of fairing pressuredistribution are also included. The techniques exploredattempted to retain a reasonable accuracy of result withoutrecourse to excessive computer power or complicatedcalculations. This was achieved successfully with thesimple models considered, despite the highly separated nature of the simulated flow."],"dc:identifier":["oai:salford-repository.worktribe.com:1389768"],"dc:language":["en"],"dc:relation.isreferencedby":["https://salford-repository.worktribe.com/output/1389768"],"dc:title":["An investigation of the aerodynamics of racing motorcycles"],"dc:type":["Thesis"],"dc:type.qualificationlevel":["Doctoral (Level 8)"]},"updated_at":"2026-07-24T04:26:35Z"}