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And whose rockets are transporting astronauts to the International Space Station...
I have trusted my life to Single-Engined 11-passenger * DeHavilland Canada DHC-3 Otter aircraft, not dozens, not hundreds, but a few thousand times.Many hundred of those flights were with single-row 9-cylinder Radial engines (the only engine DeHavilland used in the 700-or so Otters manufactured) measuring 1340 cubic inches and outputting about 600 HP. **I also spent one summer when a "Polish Otter" on Floats was based in camp, which was a single-row 9-cylinder Radial conversion with full Type Certified compliance in the US, Canada, and I'm quite sure in the Carribbean, South America, and Africa where most of these aircraft still operate in Commercial service (about 400 Otters still in the air today, manufactured from early 50's to mid 60's). This engine is larger (don't recall, but think about 1800 In2) and produces 1,000 HP, which very much wakes up this Short Takeoff Or Landing (STOL) aircraft.The PZL aircraft manufacturing plant in Poland produced this engine which quite perfectly illustrates the Soviet-era approach to manufacturing. They are considered quite reliable (I believe they have a longer Time Between Overhaul [TBO] than the Pratt&Whitney R-1340, which is 800 hours) and PZL sells Certified engines to both Russian and Western Aircraft manufacturers today.I'm not sure what to say about Rocket Technology and who stole what from whom. I think the Germans kind of wrote the book and made good use of their resumè(s) on both sides of the "Iron Curtain", retiring out of Jail with nice pensions.* At 12 passengers you need a Co-Pilot on board.** Since parts for the R-1340 are quite scarce; for example barrels are very difficult to find, and with the short TBO and the tendency to blow jugs in the air (not unusual, very rarely fatal) most Otters now have had one or another Turbo-for-Radial Engine conversion.The most common is the venerable Pratt & Whitney Canada PT-6A (designed and built in Montreal, and is the world's most popular PropJet) slightly derated to 600 HP for extended TBO (you can go over 4,000 Hrs with borescope inspections today) but with the Variable Pitch propeller which "comes with Reverse" they are a joy to fly in comparison with the P&W Radials. I've also flown some Walter Turbo conversions, not as popular as they fly the same but burn more fuel doing it.The "Polish Otter" on the other hand flys about the same as the Turbo engined Otters when it comes to load and takeoff distance. The lack of Reverse comes up in windy days, but it's hardly a deal-breaker. Any pilot who can't handle that is going to be unemployed soon enough.