{"id":942,"date":"2020-12-20T20:59:55","date_gmt":"2020-12-20T19:59:55","guid":{"rendered":"http:\/\/tst.minijets.org\/?page_id=942"},"modified":"2022-11-05T15:51:58","modified_gmt":"2022-11-05T14:51:58","slug":"baby-mamba","status":"publish","type":"page","link":"https:\/\/minijets.org\/fr\/0-100\/baby-mamba\/","title":{"rendered":"TJD 76C Baby Mamba"},"content":{"rendered":"\n
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\"Max
Max Dreher<\/figcaption><\/figure>\n<\/div>\n\n\n\n
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En\u00a01963,\u00a0Max Dreher\u00a0a commenc\u00e9 la conception du turbor\u00e9acteur\u00a0TJD 76C Baby Mamba.<\/p>\n\n\n\n

Con\u00e7u pour propulser un planeur, il avait une pouss\u00e9e statique de 55 lbs. L’objectif \u00e9tait de faire un moteur simple et aussi l\u00e9ger que possible.\u00a0Aucune r\u00e9ducteur n’a \u00e9t\u00e9 utilis\u00e9, juste un rotor libre en rotation. Le compresseur \u00e9tait \u00e0 \u00e9coulement mixte \u00e0 un seul \u00e9tage, la chambre de combustion \u00e9tait annulaire et la turbine axiale \u00e0 un seul \u00e9tage.<\/p>\n\n\n\n

L’\u00e9tude et la r\u00e9alisation ont pris environ 3600 heures. Puis le Baby Mamba a enregistr\u00e9 plusieurs essais de d\u00e9marrage, et de nombreuses heures sur banc d’essai et en vol.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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\"TJD<\/figure>\n\n\n\n
\"TJD<\/figure>\n<\/div>\n\n\n\n
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\"TJD
R\u00e9acteur T.J.D 76C ” Baby Mamba Jet”<\/figcaption><\/figure>\n\n\n\n
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The compressor and turbine rotor assembly. Source : sport aviation, 10.1969<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n
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Air intake<\/h4>\n\n\n\n

At front. Air flow 0.50 kg (1.1 lb)\/sec.<\/p>\n\n\n\n

Compressor<\/h4>\n\n\n\n

Single-stage mixed-flow. Single 17-4 PH stainless steel impeller with sixteen vanes. Splined to shaft and supported in two ball bearings. Mixed-flow two-stage diffuser of 347 stainless steel. Pressure ratio : 2.8 : 1<\/p>\n\n\n\n

Compressor casing<\/h4>\n\n\n\n

Of 2024 aluminium alloy and 347 stainless steel.<\/p>\n\n\n\n

Combustion chamber<\/h4>\n\n\n\n

Annular type with Hastelloy X outer casing and flame tube. Vaporising system with fuel\/air pre-mix. One spark plug in flame tube.Fuel system: Manual with pressurised fuel supply, or electrically-driven fuel pump. Fuel pressure 5.52 bars(80 lb\/sq in). Automatic system for drone applications. Fuel grade: Kerosene or petrol.<\/p>\n\n\n\n

Nozzle guide vanes<\/h4>\n\n\n\n

Single axial stage, with sixteen investment-cast vanes in Stellite 31.Turbine: Single-stage axial-flow, with nineteen integrally-cast blades, of Inconel 713 LC. Gas temperature 770\u00b0C before turbine, 675\u00b0C after turbine, at continuous cruising power.<\/p>\n\n\n\n

Jet pipe<\/h4>\n\n\n\n

Fixed type, with jet pipe and cone of Hastelloy X. LUBRICATION: Air\/oil mist system with total loss, using bleed air equivalent to 2.5 per cent of total mass flow.Capacity 1 litre (2 US pints).<\/p>\n\n\n\n

Oil grade<\/h4>\n\n\n\n

MIL-L-7808E (Turbo 15).<\/p>\n\n\n\n

Mounting<\/h4>\n\n\n\n

Two rigid connections on diffuser section and one flexible connection on turbine section.<\/p>\n\n\n\n

Starting<\/h4>\n\n\n\n

Compressed air 1034 bars (150 lb\/sq in), via three nozzles driving turbine wheel.<\/p>\n<\/div>\n\n\n\n

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\"TJD<\/figure>\n<\/div>\n<\/div>\n\n\n\n

Application<\/h2>\n\n\n
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Prue 215A Mamba Jet<\/a><\/h3> <\/div>\n

Mr Max Dreher, un ing\u00e9nieur en a\u00e9ronautique, a \u00e9tudi\u00e9 et construit toute une s\u00e9rie de petits turbor\u00e9acteur entre 1952 et 1976. Il a mont\u00e9 l’un d’entre eux, plus connu sous l’appellation TJD-76 Baby Mamba, sur le dos du fuselage de son planeur Prue 215A Mamba Jet. Three Prue 215s were built, all as amateur-builts from […]<\/p>\n<\/div>\n <\/div>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t <\/div>\n\n <\/div>\n \n\n\n

<\/div>\n\n\n\n

Notes et r\u00e9f\u00e9rences<\/h2>\n","protected":false},"excerpt":{"rendered":"

En\u00a01963,\u00a0Max Dreher\u00a0a commenc\u00e9 la conception du turbor\u00e9acteur\u00a0TJD 76C Baby Mamba. Con\u00e7u pour propulser un planeur, il avait une pouss\u00e9e statique de 55 lbs. L’objectif \u00e9tait de faire un moteur simple et aussi l\u00e9ger que possible.\u00a0Aucune r\u00e9ducteur n’a \u00e9t\u00e9 utilis\u00e9, juste un rotor libre en rotation. Le compresseur \u00e9tait \u00e0 \u00e9coulement mixte \u00e0 un seul \u00e9tage, […]<\/p>\n","protected":false},"author":1,"featured_media":43,"parent":15,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"cybocfi_hide_featured_image":"","footnotes":""},"categories":[12],"tags":[],"planes-000-100":[],"class_list":["post-942","page","type-page","status-publish","has-post-thumbnail","hentry","category-jet-engine-000-100"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/minijets.org\/fr\/wp-json\/wp\/v2\/pages\/942","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/minijets.org\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/minijets.org\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/minijets.org\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/minijets.org\/fr\/wp-json\/wp\/v2\/comments?post=942"}],"version-history":[{"count":0,"href":"https:\/\/minijets.org\/fr\/wp-json\/wp\/v2\/pages\/942\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/minijets.org\/fr\/wp-json\/wp\/v2\/pages\/15"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/minijets.org\/fr\/wp-json\/wp\/v2\/media\/43"}],"wp:attachment":[{"href":"https:\/\/minijets.org\/fr\/wp-json\/wp\/v2\/media?parent=942"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/minijets.org\/fr\/wp-json\/wp\/v2\/categories?post=942"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/minijets.org\/fr\/wp-json\/wp\/v2\/tags?post=942"},{"taxonomy":"planes-000-100","embeddable":true,"href":"https:\/\/minijets.org\/fr\/wp-json\/wp\/v2\/planes-000-100?post=942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}