{"id":8363,"date":"2013-10-17T17:26:57","date_gmt":"2013-10-18T00:26:57","guid":{"rendered":"http:\/\/cafe.foundation\/blog\/?p=8363"},"modified":"2013-10-17T17:26:57","modified_gmt":"2013-10-18T00:26:57","slug":"a-different-kind-of-hybrid","status":"publish","type":"post","link":"http:\/\/cafe.foundation\/blog\/a-different-kind-of-hybrid\/","title":{"rendered":"A Different Kind of Hybrid"},"content":{"rendered":"<p>In the Innovation Pavilion at Oshkosh\u2019s AirVenture 2013, Joseph Hutterer quietly drew people in with a model and an interesting approach to a single-fuel type of hybrid.\u00a0 Take the twin engines off the wings and place one of them in the modified tail.\u00a0 Now put a small turbojet in a retracting pod in the nose.\u00a0 Taxi out to the end of the runway and use both engines to take off and climb, then shut the nose jet down, retract that, and cruise on the single rear engine.<\/p>\n<p><iframe loading=\"lazy\" title=\"Hutterer Hybrid Airplane\" src=\"https:\/\/player.vimeo.com\/video\/52131718?dnt=1&amp;app_id=122963\" width=\"500\" height=\"333\" frameborder=\"0\" allow=\"autoplay; fullscreen; picture-in-picture; clipboard-write\"><\/iframe><\/p>\n<p>Hutterer, with an Aeronautical Engineering degree from the University of Minnesota, FAA commercial pilot\u2019s license with single-engine, multi-engine, instrument and glider ratings, and 42 years of engineering and marketing experience in the general aviation industry, has the credentials and the patents to make his approach credible.<\/p>\n<p>Consider that aircraft such as the Solar Impulse cruise on only about 10-percent of what they need for takeoff and climb.\u00a0 A typical business twin doesn\u2019t have the long wings and ultralight weight of such a creation, but it can climb on one engine if necessary.\u00a0 The extra thrust from the second engine adds to the performance, but adds drag and control issues.\u00a0 Hutterer claims his retractable second engine does not induce asymmetry into the mix when deployed or retracted, and that the absence of a nacelle or propeller (even feathered) reduces drag for the primary engine to overcome.<\/p>\n<p>Since both engines are turbines, they feed from a common fuel system, simplifying operations.\u00a0 With only the rear turboprop in operation, fuel burn and emissions are 40-percent lower than with conventional twins.\u00a0 If the rear engine suffers a failure, the front engine can fly the airplane to its destination.<\/p>\n<p>Hutterer holds United States patent 7,549,60, good for 20 years and for any size aircraft.\u00a0 He sees the implementation of that patent as important to addressing the continuing increase in fuel costs (and the implied loss of 100-octane low-lead avgas), increasing demands for reduced CO2 emissons, the desire to reduce oil imports to the U. S., especially from unfriendly countries (a process already in progress), and the public perception that business jets are an unjustified luxury.<\/p>\n<div id=\"attachment_8365\" style=\"width: 538px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2013\/10\/hutterer-PropulsiveEfficiency.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-8365\" class=\"size-large wp-image-8365\" alt=\"Chart shows relative efficiencies of different modes of providing thrust\" src=\"http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2013\/10\/hutterer-PropulsiveEfficiency-528x408.jpg\" width=\"528\" height=\"408\" srcset=\"http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2013\/10\/hutterer-PropulsiveEfficiency-528x408.jpg 528w, http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2013\/10\/hutterer-PropulsiveEfficiency-300x231.jpg 300w, http:\/\/cafe.foundation\/blog\/wp-content\/uploads\/2013\/10\/hutterer-PropulsiveEfficiency.jpg 572w\" sizes=\"auto, (max-width: 528px) 100vw, 528px\" \/><\/a><p id=\"caption-attachment-8365\" class=\"wp-caption-text\">Chart shows relative efficiencies of different modes of providing thrust<\/p><\/div>\n<p>Hutterer notes that the chart shows the turboprop engine being outstanding in giving high cruise speeds while dropping fuel demands.\u00a0 He claims that, up to Mach 0.75, where the turboprop loses efficiency, its efficient acceleration of large masses of air makes it competitive with slower pure jet aircraft.\u00a0 Whether this will change perceptions of businessmen luxuriating in high-speed, high-altitude comfort remains to be seen.<\/p>\n<p>Efficiency is important, even for those with money to burn, so improvements which promise the kinds of fuel savings coupled with safety and performance may find favor in the business aircraft world.<\/p>\n<p>&nbsp;<\/p>\n<div id=\"facebook_like\"><iframe src=\"http:\/\/www.facebook.com\/plugins\/like.php?href=http%3A%2F%2Fcafe.foundation%2Fblog%2Fa-different-kind-of-hybrid%2F&amp;layout=standard&amp;show_faces=true&amp;width=500&amp;action=like&amp;font=segoe+ui&amp;colorscheme=light&amp;height=80\" scrolling=\"no\" frameborder=\"0\" style=\"border:none; overflow:hidden; width:500px; height:80px;\" allowTransparency=\"true\"><\/iframe><\/div>","protected":false},"excerpt":{"rendered":"<p>In the Innovation Pavilion at Oshkosh\u2019s AirVenture 2013, Joseph Hutterer quietly drew people in with a model and an interesting approach to a single-fuel type of hybrid.\u00a0 Take the twin engines off the wings and place one of them in the modified tail.\u00a0 Now put a small turbojet in a retracting pod in the nose.\u00a0 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[16,14],"tags":[4340,4337,2202,3513,4336,4338,68,4339,4341],"class_list":["post-8363","post","type-post","status-publish","format-standard","category-diesel_powerplants","category-sustainable_ga","tag-100-octaine-low-lead-aviation-gasoline","tag-hutterer-engineering-inc","tag-hybrid-aircraft","tag-innovation-pavilion","tag-joseph-hutterer","tag-oshkosh-2013","tag-solar-impulse","tag-turboprop-hybrid","tag-university-of-minnesota"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - 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