Live data from Hacker News

One man designed and built the ultimate bush plane

arstechnica.com

61–70 of 83 posts

Re: One man designed and built the ultimate bush plane

#61
post #31

Earlier quoted context omitted.

I've seen one flying backwards on an air-show. It has an extremely low stall speed.

Apparently the Antonov An-2 [1] can also fly backwards. There is no published stall speed in the flight manual and realistically it's around 25 kt (50 km/h). [1] https://en.wikipedia.org/wiki/Antonov_An-2

Fun fact, Antonov was responsible for the Soviet effort to copy the Storch, years before designing the An-2.

Re: One man designed and built the ultimate bush plane

#62
post #7
post #6

Earlier quoted context omitted.

Go watch the build videos and you'll understand how he got it done in 5 months. The guy is definitely "special" in the sense that he's incredibly driven, very positive, and a bit scary. Apparently, he only sleeps a few hours a day.

The playlist is here [0], and it's definitely worth watching! The completed plane is just insane, and I was amazed at how much of it he made from carbon fiber. 0: https://www.youtube.com/playlist?list=PL9OFkVHYEhoEfWmN0lQRZ...

Not only is this really impressive, but it also sounds like that whole hanger is his. Of course you have to have money if your hobby is planes but look at what else is inside the hanger, that's incredible. And the view outside the hanger door windows is unobstructed mountains. Doesn't get much better.

Re: One man designed and built the ultimate bush plane

#63

Earlier quoted context omitted.

Carbon: One of the most popular high performance light bush planes at the moment: https://en.wikipedia.org/wiki/CubCrafters_Carbon_Cub_EX Turbines: The money makers: https://en.wikipedia.org/wiki/De_Havilland_Canada_DHC-3_Otte... (plus it's twin cousin) https://en.wikipedia.org/wiki/Sherpa_Aircraft_Sherpa So these aren't bush planes? Edit: further, there's nothing inherent to carbon or turbines that make them unsuita…

My worry with a turbine on a bushplane would be the potential for it to ingest gravel / sand / rocks etc. Surely a prop is better suited for this? You could even carry a spare "just in case".

Piston engines have air intakes too. A 600ish HP turbine is also moving a lot less air than you probably think.. it's not a high-bypass jet on an airliner.

Small/medium sized turbines are used all the time on helicopters, which routinely see backwoods operation.

Re: One man designed and built the ultimate bush plane

#64

Earlier quoted context omitted.

And most true in aviation. With enough funds you can buy some very magical things. But it isnt a bush plane if it cannot be fixed in the bush . Things like turbines and carbon fiber dont lend themselves to repair in an actual field.

Carbon: One of the most popular high performance light bush planes at the moment: https://en.wikipedia.org/wiki/CubCrafters_Carbon_Cub_EX Turbines: The money makers: https://en.wikipedia.org/wiki/De_Havilland_Canada_DHC-3_Otte... (plus it's twin cousin) https://en.wikipedia.org/wiki/Sherpa_Aircraft_Sherpa So these aren't bush planes? Edit: further, there's nothing inherent to carbon or turbines that make them unsuita…

They certainly do push the limit of what I'd call a bushplace. Are we going to define anything that lands on grass a bushplane? They operate in the woods, but can they actually live in the woods? Turbines need to be sent away for servicing and are very expensive. They cannot be disassembled or inspected without things like bore scopes. These are the planes that service logging camps, commercial operations, and fly back to aerodromes. They aren't the romantic planes servicing trappers or individual prospectors, the ones that sleep under a tarp most nights.

Re: One man designed and built the ultimate bush plane

#65

As someone who does this kind of work, the timeline is absolutely insane. The aircraft started out as a PZL-104MA Wilga 2000 but he redid part of the wing, built an entire carbon fiber cowling and redid the wiring, all on top of the engine install, though that and the carbon fiber he had fairly extensive previous experience with. One thing you'll notice if you watch the build videos is he makes extensive use of very…

Insane timeline indeed! I wish I had a work ethic like that. It's interesting how he tells that as a child, he was encouraged by his parents to "always finish his project, no matter how much you disliked it". I wonder what the reliability of this beast is like, but I guess only time will tell. If anyone is interested in this kind of stuff (fiberglassing fuselages, building cockpits...), Peter Sripol, a model plane en…

About 2 years into an RV kit build, so I’m pretty jealous of this guy right now. Fantastic airplane he made! It would have taken me 5 months just to tear the old one apart.

Re: One man designed and built the ultimate bush plane

#66

Earlier quoted context omitted.

Carbon: One of the most popular high performance light bush planes at the moment: https://en.wikipedia.org/wiki/CubCrafters_Carbon_Cub_EX Turbines: The money makers: https://en.wikipedia.org/wiki/De_Havilland_Canada_DHC-3_Otte... (plus it's twin cousin) https://en.wikipedia.org/wiki/Sherpa_Aircraft_Sherpa So these aren't bush planes? Edit: further, there's nothing inherent to carbon or turbines that make them unsuita…

My worry with a turbine on a bushplane would be the potential for it to ingest gravel / sand / rocks etc. Surely a prop is better suited for this? You could even carry a spare "just in case".

These are turbo-props. The jet bit is only a power supply to turn a propeller. It doesn't provide thrust like in a 747 or military jet. Its air intake is covered by a filter system just like any piston engine. For a given fuel consumption, the amount of air moving in/out of a turbine engine is roughly proportional to a piston engine.

Re: One man designed and built the ultimate bush plane

#67

Earlier quoted context omitted.

Insane timeline indeed! I wish I had a work ethic like that. It's interesting how he tells that as a child, he was encouraged by his parents to "always finish his project, no matter how much you disliked it". I wonder what the reliability of this beast is like, but I guess only time will tell. If anyone is interested in this kind of stuff (fiberglassing fuselages, building cockpits...), Peter Sripol, a model plane en…

> "always finish his project, no matter how much you disliked it". Yeah, I wish my parents would have taught me this when I was young.

Well I never learned it until the pain and waste of unfinished projects pushed me. This talk by John Carmack was encouraging too. He talks about the importance of finishing projects: https://youtu.be/vlYL16-NaOw

Re: One man designed and built the ultimate bush plane

#68
post #31

Earlier quoted context omitted.

I've seen one flying backwards on an air-show. It has an extremely low stall speed.

Apparently the Antonov An-2 [1] can also fly backwards. There is no published stall speed in the flight manual and realistically it's around 25 kt (50 km/h). [1] https://en.wikipedia.org/wiki/Antonov_An-2

AN-2 doesn't stall (with power on)... it just mushes and descendeds at a few hundred feet per minute. Emergency procedure is to just hold the stick aft and give it power. Almost like descending under a parachute.

Re: One man designed and built the ultimate bush plane

#69
post #46

Woo, turbines are great; fantastically reliable, awesome power-to-weight, able to use cheaper and safer fuel than gasoline piston engines. They are pretty expensive though, wikipedia says the PT6 used in this project starts at around $500K. There's a few companies designing smaller turbines (100-200 kW size) for aircraft, http://www.turbotech-aero.com/ and https://www.turb.aero/ , competing with Rotax 912, Lycoming,…

This is awesome and all, but even a used PT6 turbine is a lot of money. If I were the sort of rich person who could afford this, I'd be looking at turbine-retrofitted DHC Beavers and Turbo Otters instead.

For example the Viking Air rebuilt turbine beavers:

https://www.vikingair.com/viking-aircraft/dhc-2t-turbo-beave...

Post reply on HN