{"product_id":"9781289267353","title":"The Design and Testing of a Miniature Turbofan Engine","description":"Off-the-shelf jet propulsion in the 50 - 500 lb thrust class sparse. A true twin-spool turbofan in this range does not exist. Adapting an off-the-shelf turboshaft engine is feasible. However the approx.10 Hp SPT5 can t quite make 50 lbs. of thrust. Packaging and integration is challenging, especially the exhaust. Building on our engine using a 25 Hp turboshaft seems promising if the engine becomes available. Test techniques used, though low cost, adequate for the purpose.","brand":"Bibliogov","offers":[{"title":"Default Title","offer_id":48530909790449,"sku":"9781289267353","price":15.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/5433\/7265\/files\/9781289267353_p0.jpg?v=1786297595","url":"https:\/\/shop.barnesandnoble.com\/products\/9781289267353","provider":"Barnes \u0026 Noble","version":"1.0","type":"link"}