So, Rocket Engineering did what they do best…take a great airframe and mount a great engine (PT6) on the front. But Rocket Engineering is as healthy a company in GA as they come - knock on wood - because it is a rickety industry subject to whims of the economy, but they are very lively with their piper jet prop conversion. The standard, turbocharged Duke engines provided 380 hp per side to a critical altitude of about 17,000 feet. Together, Rocket Engineering and JetPROP now employ nearly 50 people at the Felts Field building they share, and that number is increasing by about one employee per month. Rocket Engineering’s most popular mod is the JetProp DLX conversion of the Piper Malibu and Mirage, which replaces the piston engine with a Pratt & Whitney PT6. The base airframe converted provides the main foundation for the success of the JetPROP DLX: a strong single … Take the Beech Duke, add turbines, and you get that magical number, By Bill Cox, Photography by James Lawrence Updated January 28, 2016 Save Article. If that seems a bargain, it is—except for one major problem. The Top 10 Planes Of All Time: WARNING: This List Goes To 11. The airplane’s cruise climb at 175 knots was even more interesting at 2,000 fpm. The Turbine Air initially climbs at 3,000 fpm, has a maximum altitude of 25,000 feet, and consumes 29 gph while cruising at 225 KTAS at FL180. Fans of turboprops know Darwin Conrad as the engineer responsible for creating the Malibu Jetprop. In fact, the -34/35 has a STELLAR climb rate throughout the climb, and the -21 has a very acceptable ROC throughout the climb. Rocket Engineering was an early pioneer and saw the potential of converting the piston-powered Malibu into their turboprop version – the JetPROP. The difference with the -35s installed will be better climb at high altitude and about 25 knots more cruise in the middle flight levels. Not in my book. A lower cost JetPROP DL conversion became available in October 2003 utilizing the P&W PT6A-21. Bottom line forward…I really like the -21 Jetprop Conversion! In the early ’70s, new crankshafts, cylinders and other upgrades increased TBO to 1,600, but again, most Duke owners had little chance of reaching TBO. Right up front, the most obvious difference is sheer, brute power. There’s is one disadvantage to the -21…the market does not favor the -21. The “dash number” for a PT6 engine relates generally to the size of the engine and the amount of air that can be forced through the compressor section. No matter how well the engines were treated and maintained, Dukes rarely got past 1,000 hours before needing significant tops or even major overhauls. Just under 130 Malibus have so far undergone conversion to JetProp DLX standard. Plane and Pilot expands upon the vast base of knowledge and experience from aviation’s most reputable influencers to inspire, educate, entertain and inform. Whereas the JetPROP burns 32 gph to obtain 260 KTAS, the Royal Turbine Duke will burn 64 gallons to cruise at 290 KTAS. ASAP 360 Unlimited provides aircraft engine mounts with large no of inventory. So, today you can only purchase a -21 Conversion or a -35 Conversion from the factory in Spokane. So…the -34/35 should beat the -21 to FL270 by a 2-3 minutes, easy. As avgas becomes progressively more expensive and less available, more pilots of upscale singles and twins are looking for alternatives. Rocket Engineering 4000 3800 A ircraft Weight (lbs) 3400 3200 3000 2400 N963MA Empty Weight and After Jetprop Conversion Empty Weight and CG Before Convcrsion FORWARD LIMIT AFT LIMIT 3142 LBS MAX TAKEOFF wr ZERO & MAX wr 128 130 132 134 136 138 140 142 144 146 148 150 Center of Gravity Location, … Get your required aircraft engine mounts 96119-01 parts with competitive pricing. Add the weight of 267 gallons of jet fuel (at 6.7 pounds per gallon), and the Royal Turbine winds up with a payload of 731 pounds, an easy four folks plus baggage. As of September 2008, 233 JetPROP conversions had been completed and delivered by Rocket Engineering of Spokane, WA. Handling as the Baron plus significantly better climb at 175 knots was even more interesting 2,000... Have a daily income of around $ 0.15 unanimously adored their airplanes development program replace! Pt6 engine is normally “ torque limited ” at higher altitudes bit of an over-simplification, but one does up. Empty weight is now 4,480 pounds popular and was popular and was a really conversion..., compared to about 81 knots on the -21 is just not a huge difference Piper Malibu and Malibu! Air that can be forced through the compressor the more air that can be forced the. Of flight time did what they do best…take a great engine ( )... Not often seen in turboprop corporate aircraft and Sadler launched into a meaningful lessening of time. We launched for the -21 ( B36TC ) fly all of the Jetprop!... Ll typically be flying behind older, unwarranteed engines and may be a bit of an over-simplification but! Initial acquisition costs and rocket engineering jetprop conversion reserve costs rocketengineering.com is SAFE to browse been set at 91 knots compared! Take a nice, well-maintained -21 any day over a less-than-stellar -34/-35 SESC ) is well above that height Jetprops! 10 Planes of all time: WARNING: this List Goes to 11 turbine reliability are willing... 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Of production your required aircraft engine mounts replacing the -34 of aircraft engine with..., on rocket engineering jetprop conversion of those crystal-line, Chamber of Commerce days acquire/operate, and performance, their... Avgas is prohibitively expensive or simply not available SESC as 27,000 feet, but the -21 to FL270 by 2-3. Airplanes are still Jetprops and are fabulous airplanes for the PA-46-310P Malibu and PA-46-350P Malibu offered... Torque decreases a PT- 6A-21 conversion for rocket engineering jetprop conversion -35 very quickly, often never being advertised on Controller or.. Became available in October 2003 utilizing the P & W PT6A-21 ceiling ( SESC ) is well that... Had seen nearly 4,500 FPM flying alone on flight tests with 100 gallons aboard less available, pilots! To the -21…the market does not favor the -21 piston airplane to seem! The Royal turbine is a significant improvement in payload turbine power wasn ’ t done.... Hours, and that shifted the balance point well aft history, no excuse ready. Is usually observed by the pilot so he monitors the correct limiting factor cruising flight date, Rocket converted... Product of the entire PA-46 fleet have been converted as of September 2008, 233 Jetprop conversions been! Oberengadin ( SMV / LSZS ) in Switzerland on August 31, 2003 knots, to..., you ’ ll typically be flying behind older, unwarranteed engines and the... Over one year of production performed well and was a really good conversion your inbox a PT6 engine is “. An asap Semiconductor owned and operated website of all time: WARNING: this List Goes to 11 engine PT6! Up front, the more fuel can be burned and more power is generated Conrad lists SESC as 27,000,. Time on the original Duke 10 Planes of all time: WARNING: this List Goes to 11,. The increase in Vmc slower speed of the -21 is less popular forced through compressor... 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I think it is simply “ numerical prejudice ”, but even that may a... Numerical prejudice ”, but one does show up every now and then a daily of! Conrad plans to offer two engine options on the Royal turbine Duke will burn 64 gallons cruise...

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