This is pretty sweet!
For when AVGAS goes the way of the Dodo. |
Doesn't compute...
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Holy crap! I want one! That's awesome!
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What's the small tube running down the rear of the right skid that seems to be venting a small amount of exhaust?
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Why might it need a clutch if it has a turboshaft engine?
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Originally Posted by gulliBell
(Post 11054351)
Why might it need a clutch if it has a turboshaft engine?
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Originally Posted by krypton_john
(Post 11054371)
It's probably a fixed spool turbine so the output shaft is the same as the compressor...
I see the same idea has been used elsewhere: https://www.laehelicopterscyprus.com/piranha.html |
APU driven ultralights aren't new.
https://www.famahelicopters.com/index.php/en/kiss-216 |
It seems like pretty dodgy ground really, as these units are not designed as propulsion devices and are not designed or certified as such. Here is an extract from the FAA TSO qualification standards:
The standards of TSO C77b apply to gas turbine engines intended to provide auxiliary electrical, pneumatic, or mechanical power to support airplane systems operations. These standards do not apply to gas turbine engines intended for aircraft propulsion nor do they address the integration of the APU into the design of the airplane. |
Originally Posted by 212man
(Post 11054625)
It seems like pretty dodgy ground really, as these units are not designed as propulsion devices and are not designed or certified as such. Here is an extract from the FAA TSO qualification standards:
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The FAA used to require systems like PBA on the Sikorsky 76....but no longer do.
Just because the FAA requires something does not mean they are on top of things....it just shows what the current regulation requires. I remember when Soloy began to add Turbine Engines to Hillers and General Aviation Airplanes....that caused the FAA some discomfort but we see how that turned out. Technology moves forward.....Certification Authorities always lag behind technological advances. A good example is the FAA and helicopter fly by wire designs....industry had the engineering to move forward and the FAA did not have the equal expertise to craft the certification requirements and the industry had to teach the FAA what it needed to know to accomplish that. Bottom line....it is still a Robbie that can carry a hundred kilo's of useful load due to the lighter engine. |
The FAA used to require systems like PBA on the Sikorsky 76....but no longer do. Technology moves forward.....Certification Authorities always lag behind technological advances |
Quoting from an earlier post by Bell Ringer......
That's why they fit into experimental or restricted use categories. As to PBA....plenty of discussion about that another thread. |
APU powered experimental helicopters have been around for a long time: Rotorway JetExec
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a Robbie that can carry a hundred kilo's of useful load due to the lighter engine |
Originally Posted by Ascend Charlie
(Post 11054861)
So, now those porky Murricans can train in this instead of the R44 Cadet.
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With 100Kg less at the back and Claude in front you better watch your CG
Now get on to fix the mast bumping limitation... |
Yeah, spend the money putting a Hughes/ Schweizer 300 rotor head on it, or even a (barrff!) Enstrom head.
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Originally Posted by Ascend Charlie
(Post 11055035)
Yeah, spend the money putting a Hughes/ Schweizer 300 rotor head on it, or even a (barrff!) Enstrom head.
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