{"product_id":"bjcraft-epilogue-2m-f3a-rc-airplane-arf-version-2-non-contra-and-contra","title":"BJ Craft Epilogue 2M F3A RC Airplane ARF - Version 2 (Non-Contra and Contra)","description":"\u003ch2\u003eBJ Craft Epilogue 2M F3A RC Airplane ARF - Version 2 (Non-Contra and Contra)\u003c\/h2\u003e\n\u003cp\u003eExperience why the F3A world is buzzing about the BJ Craft models. Designed by \u003cstrong\u003eBJ Park\u003c\/strong\u003e and manufactured with precision by \u003cstrong\u003eBJ Craft\u003c\/strong\u003e, the Epilogue represents the pinnacle of competition performance.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFlight Performance \u0026amp; Media\u003c\/h3\u003e\n\u003cdiv style=\"left: 0; width: 100%; height: 0; position: relative; padding-bottom: 56.25%;\"\u003e\u003ciframe style=\"top: 0; left: 0; width: 100%; height: 100%; position: absolute; border: 0;\" src=\"https:\/\/www.youtube.com\/embed\/oohycQE9948\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003chr\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eWingspan\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e74\" (188cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e78.7\" (200cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eWing Area\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e60 dm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eStabilizer Area\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e16 dm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eSpinner Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e82 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eNet Weight (ARF)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e2100g (Approx. 4.6 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eRTF Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e4800g (Approx. 10.5 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eCenter of Gravity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e220-230mm from Wing Root L\/E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eRecommended Radio \u0026amp; Servo Setup\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRadio System:\u003c\/strong\u003e 6 Channel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAileron Servos:\u003c\/strong\u003e 2x (Min. 4kg torque) — \u003cem\u003eRecommended: MKS HV737\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElevator Servos:\u003c\/strong\u003e 2x (Min. 3kg torque) — \u003cem\u003eRecommended: MKS HV69\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRudder Servo:\u003c\/strong\u003e 1x (Min. 8kg torque) — \u003cem\u003eRecommended: MKS HV747\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eESC:\u003c\/strong\u003e 1x High-Performance Competition ESC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"1\"\u003e\n\u003ch2 data-path-to-node=\"2\"\u003e1. Non-Contra (Single Propeller)\u003c\/h2\u003e\n\u003cp data-path-to-node=\"3\"\u003eThis is the traditional setup using one motor and one propeller. Because the propeller spins in one direction, it creates several aerodynamic forces that try to pull the airplane off its flight path.\u003c\/p\u003e\n\u003cul data-path-to-node=\"4\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,0,0\"\u003e\u003cb data-path-to-node=\"4,0,0\" data-index-in-node=\"0\"\u003eP-Factor:\u003c\/b\u003e At high angles of attack, the descending blade produces more thrust than the ascending blade, pulling the plane to the left.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,1,0\"\u003e\u003cb data-path-to-node=\"4,1,0\" data-index-in-node=\"0\"\u003eSlipstream Effect:\u003c\/b\u003e The \"corkscrew\" air from the prop hits the left side of the vertical tail, pushing the tail right and the nose left.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,2,0\"\u003e\u003cb data-path-to-node=\"4,2,0\" data-index-in-node=\"0\"\u003eTorque:\u003c\/b\u003e The motor spinning the prop one way tries to roll the entire airframe the opposite way.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"5\"\u003eThe Role of Right Thrust\u003c\/h3\u003e\n\u003cp data-path-to-node=\"6\"\u003eTo counter these \"left-pulling\" forces, pilots build \u003cb data-path-to-node=\"6\" data-index-in-node=\"53\"\u003eRight Thrust\u003c\/b\u003e into the motor mount.\u003c\/p\u003e\n\u003cul data-path-to-node=\"7\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,0,0\"\u003e\u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"0\"\u003eThe Angle:\u003c\/b\u003e Usually between \u003cb data-path-to-node=\"7,0,0\" data-index-in-node=\"27\"\u003e2.0° and 3.5°\u003c\/b\u003e of right thrust is required.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"7,1,0\"\u003e\u003cb data-path-to-node=\"7,1,0\" data-index-in-node=\"0\"\u003eThe Goal:\u003c\/b\u003e You want the airplane to climb perfectly straight at full throttle without you having to hold right rudder manually.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"8\"\u003e\n\u003ch2 data-path-to-node=\"9\"\u003e2. Contra-Rotating Systems\u003c\/h2\u003e\n\u003cp data-path-to-node=\"10\"\u003eA Contra system uses two propellers spinning in opposite directions on the same axis.\u003c\/p\u003e\n\u003cul data-path-to-node=\"11\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,0,0\"\u003e\u003cb data-path-to-node=\"11,0,0\" data-index-in-node=\"0\"\u003eNeutralized Torque:\u003c\/b\u003e Since the props spin in opposite directions, the rotational forces cancel each other out. There is virtually no torque-roll.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,1,0\"\u003e\u003cb data-path-to-node=\"11,1,0\" data-index-in-node=\"0\"\u003eStraight Slipstream:\u003c\/b\u003e The second prop \"straightens\" the air coming off the first one. This results in a symmetrical airflow over the fuselage and tail.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,2,0\"\u003e\u003cb data-path-to-node=\"11,2,0\" data-index-in-node=\"0\"\u003eBraking Effect:\u003c\/b\u003e Contra systems provide massive aerodynamic braking during downlines, allowing for very constant speed throughout a flight sequence.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"12\"\u003eRight Thrust in Contra Systems\u003c\/h3\u003e\n\u003cp data-path-to-node=\"13\"\u003eUnlike single prop setups, \u003cb data-path-to-node=\"13\" data-index-in-node=\"27\"\u003eContra systems typically require 0° (Neutral) Right Thrust.\u003c\/b\u003e * Because the aerodynamic forces are balanced, the plane doesn't naturally pull to the left.\u003c\/p\u003e\n\u003cul data-path-to-node=\"14\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"14,0,0\"\u003eBuilding in right thrust on a Contra system would actually cause the plane to pull to the right under power.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"15\"\u003e\n\u003ch2 data-path-to-node=\"16\"\u003eComparison Summary\u003c\/h2\u003e\n\u003ctable data-path-to-node=\"17\" style=\"width: 100%; height: 176.344px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 20.7227%; height: 19.5938px;\"\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 38.7137%; height: 19.5938px;\"\u003e\u003cstrong\u003eNon-Contra (Single Prop)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 36.635%; height: 19.5938px;\"\u003e\u003cstrong\u003eContra-Rotating\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 20.7227%; height: 19.5938px;\"\u003e\u003cspan data-path-to-node=\"17,1,0,0\"\u003e\u003cb data-path-to-node=\"17,1,0,0\" data-index-in-node=\"0\"\u003eRight Thrust\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 38.7137%; height: 19.5938px;\"\u003e\u003cspan data-path-to-node=\"17,1,1,0\"\u003eRequired (\u003cb data-path-to-node=\"17,1,1,0\" data-index-in-node=\"10\"\u003e2.5° – 3.0°\u003c\/b\u003e typically)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 36.635%; height: 19.5938px;\"\u003e\u003cspan data-path-to-node=\"17,1,2,0\"\u003e\u003cb data-path-to-node=\"17,1,2,0\" data-index-in-node=\"0\"\u003e0° (Neutral)\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 20.7227%; height: 39.1875px;\"\u003e\u003cspan data-path-to-node=\"17,2,0,0\"\u003e\u003cb data-path-to-node=\"17,2,0,0\" data-index-in-node=\"0\"\u003eTorque Effect\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 38.7137%; height: 39.1875px;\"\u003e\u003cspan data-path-to-node=\"17,2,1,0\"\u003eNoticeable; requires pilot compensation\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 36.635%; height: 39.1875px;\"\u003e\u003cspan data-path-to-node=\"17,2,2,0\"\u003eAlmost non-existent\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 20.7227%; height: 39.1875px;\"\u003e\u003cspan data-path-to-node=\"17,3,0,0\"\u003e\u003cb data-path-to-node=\"17,3,0,0\" data-index-in-node=\"0\"\u003eDownline Braking\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 38.7137%; height: 39.1875px;\"\u003e\u003cspan data-path-to-node=\"17,3,1,0\"\u003eMinimal (depends on prop pitch)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 36.635%; height: 39.1875px;\"\u003e\u003cspan data-path-to-node=\"17,3,2,0\"\u003eExcellent (constant speed)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 20.7227%; height: 39.1875px;\"\u003e\u003cspan data-path-to-node=\"17,4,0,0\"\u003e\u003cb data-path-to-node=\"17,4,0,0\" data-index-in-node=\"0\"\u003eComplexity\/Cost\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 38.7137%; height: 39.1875px;\"\u003e\u003cspan data-path-to-node=\"17,4,1,0\"\u003eLower; simpler maintenance\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 36.635%; height: 39.1875px;\"\u003e\u003cspan data-path-to-node=\"17,4,2,0\"\u003eHigher; requires specialized gearboxes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 20.7227%; height: 19.5938px;\"\u003e\u003cspan data-path-to-node=\"17,5,0,0\"\u003e\u003cb data-path-to-node=\"17,5,0,0\" data-index-in-node=\"0\"\u003eFlight Feel\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 38.7137%; height: 19.5938px;\"\u003e\u003cspan data-path-to-node=\"17,5,1,0\"\u003eMore \"organic\" and traditional\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 36.635%; height: 19.5938px;\"\u003e\u003cspan data-path-to-node=\"17,5,2,0\"\u003eVery \"locked-in\" and robotic\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eWhy Buy From Gator RC?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFast U.S. shipping\u003c\/li\u003e\n\u003cli\u003eExpert RC support\u003c\/li\u003e\n\u003cli\u003eCarefully packed for safe delivery\u003c\/li\u003e\n\u003cli\u003eTrusted source for premium RC aircraft\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eShipping \u0026amp; Handling\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCarefully packed to protect your airframe\u003c\/li\u003e\n\u003cli\u003eShipped from the USA\u003c\/li\u003e\n\u003cli\u003eCalculated shipping ensures accurate rates\u003c\/li\u003e\n\u003cli\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch4\u003e\u003cstrong\u003eCustom Building Services:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cblockquote\u003e\n\u003cp\u003eWe offer \u003cstrong\u003efull turnkey building services\u003c\/strong\u003e at the Gator\/F3A Unlimited facility. We can professionally install any contra or single propeller motor system for a nominal fee. Please call or email regarding custom setup options for this model.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BJ Craft","offers":[{"title":"Non-Contra","offer_id":48143967846622,"sku":"BJEPILOGUE-non-con","price":2605.5,"currency_code":"USD","in_stock":true},{"title":"Contra","offer_id":48143967879390,"sku":"BJEPILOGUE-con","price":2605.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/1436\/6686\/files\/epilogue_jr_jpg.webp?v=1750960977","url":"https:\/\/www.gator-rc.com\/products\/bjcraft-epilogue-2m-f3a-rc-airplane-arf-version-2-non-contra-and-contra","provider":"Gator RC","version":"1.0","type":"link"}