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Smart throttle

Old 21st Jun 2021, 17:06
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Smart throttle

A single throttle lever that controls both engines with reverse thrust and airbrake controls integrated into the lever.

This is what the Falcon 10X will have.
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Old 21st Jun 2021, 18:03
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WHY?
If it ain't broke, don't fix it.
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Old 21st Jun 2021, 18:29
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I foresee a problem complying with 25.903(b):
(b) Engine isolation. The powerplants must be arranged and isolated from each other to allow operation, in at least one configuration, so that the failure or malfunction of any engine, or of any system that can affect the engine, will not -

(1) Prevent the continued safe operation of the remaining engines; or

(2) Require immediate action by any crewmember for continued safe operation.
With a single lever, how will you provide isolation for a failure or jam of that lever assembly?
It would also make intentional asymmetric thrust rather difficult (such as setting a malfunctioning engine at idle to provide electric and hydraulics, while actually flying the aircraft with the other)
As dixi notes, what problem are they trying to solve?
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Old 21st Jun 2021, 18:31
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dixi188

The same could be said about living in a cave I suppose...
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Old 21st Jun 2021, 18:47
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Or having someone in a control tower
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Old 21st Jun 2021, 20:06
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tdracer

On the aircraft type I used to fly there was a "sync switch" that would make one of the thrust levers the controlling one and you could move the other anywhere and it makes no difference, same principle can be applied here.
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Old 21st Jun 2021, 20:46
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Yea, but that's with two levers.
What we are talking about is:
A single throttle lever that controls both engines with reverse thrust and airbrake controls integrated into the lever.
So there is nothing to separate...
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Old 21st Jun 2021, 21:04
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WiFi reception will be bad in caverns without a router. That’s reason enough to not live in a cave.
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Old 21st Jun 2021, 21:23
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tdracer

lol. I'm sure it will be thought through though, with reversion and abnormal procedures in place..
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Old 21st Jun 2021, 21:52
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They've lost their minds again.
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Old 21st Jun 2021, 22:11
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Private jet

Why would that be useful? Most of my time is on heavy twin jets, and I don’t know why I would want that setup?
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Old 21st Jun 2021, 22:30
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Private jet

So, like the original implementation of MCAS

Aside from falling afoul of the regulations - in addition to the 25.903(b), there is 25.901(c) - no single failure shall result in an unsafe condition (at best, it's going to require an "Equivalent Level of Safety" finding), I fail to see any advantages aside from a slight reduction in manufacturing costs. OTOH and can see numerous drawbacks.
What problem are they trying to correct?
We moved out of caves and into buildings because it was a better solution. I fail to see how going to a single thrust lever for a twin engine aircraft is in anyway a better solution.
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Old 22nd Jun 2021, 00:57
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What problem would this new setup solve?
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Old 22nd Jun 2021, 02:40
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Dassault have experience with the system through the same set up in the Rafale fighter. Details are elusive, other than this comment from a pilot report.
Taxi speed is easily controlled, because the residual ground thrust is limited by keeping both "mini-throttles" (acting as low-pressure cocks) in the "idle" position before setting them to "normal" for take-off
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Old 22nd Jun 2021, 02:56
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In a single seat fighter I suppose thereís some rationale for this gadget


In a civilian biz jet itís just technology for its own sake
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Old 22nd Jun 2021, 03:19
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Check Airman

Kegworth is the first thing that comes to mind. We'll be at the pilot+dog cockpit team before you know it. Touch a flight control, that mutt will bite you HARD.

Further details on the implementation here. https://www.ainonline.com/aviation-n...-autothrottles
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Old 22nd Jun 2021, 04:35
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Wasn't that the accident where the wrong engine was shut down?
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Old 22nd Jun 2021, 06:17
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I believe they want to move to a PFD-HUD which makes the space in the panel for the former PFD usable for other things. Will be interesting to see if that works.
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Old 22nd Jun 2021, 07:59
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There are many occasions where differential thrust is useful/required, such as turning on the runway. How do you do that with only one lever?
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Old 22nd Jun 2021, 07:59
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swh

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tdracer

The single lever will be the primary method to control the thrust in normal operations, there are secondary controls which will enable individual controls in non normal situations, it will also feature the auto recovery to straight and level like the Avidyne DFC90 autopilot.
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