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Baroque Bloke
Picture of Pipe Smoker
posted
This VTOL aircraft is quite interesting. Will be even more interesting if it's actually produced!

https://lilium.com/technology/



Serious about crackers
 
Posts: 8946 | Location: San Diego | Registered: July 26, 2014Reply With QuoteReport This Post
Go ahead punk, make my day
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More ways for rich stupid people to kill themselves. Big Grin
 
Posts: 45798 | Registered: July 12, 2008Reply With QuoteReport This Post
אַרְיֵה
Picture of V-Tail
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300 km range. That's just under 162 nm.

300 kph cruise. That's just under 162 kts.

Jet? Hah! Piston-powered V-Tail cruises 174 kts (198 mph), with almost five times the range.

One hour endurance? FAA regs require 30 minute reserve fuel for daytime VFR flight, reducing the flight-plan endurance to 30 minutes, or 81 nm range. IFR regs require fuel to primary destination, plus divert to alternate, plus 45 minute reserve. One hour endurance does not provide for much of a flight.

Rhino is correct. This aircraft is essentially useless.



הרחפת שלי מלאה בצלופחים
 
Posts: 30663 | Location: Central Florida, Orlando area | Registered: January 03, 2010Reply With QuoteReport This Post
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quote:
300 kt cruise. 300 km/h cruise. That's just under 162 kts.


Fixed a small typo.
 
Posts: 2771 | Location: Northern California | Registered: December 01, 2006Reply With QuoteReport This Post
אַרְיֵה
Picture of V-Tail
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quote:
Originally posted by SigSAC:
quote:
300 kt cruise. 300 km/h cruise. That's just under 162 kts.
Fixed a small typo.
You are correct. Thank you. I'll go back and fix it.



הרחפת שלי מלאה בצלופחים
 
Posts: 30663 | Location: Central Florida, Orlando area | Registered: January 03, 2010Reply With QuoteReport This Post
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We’re going to have to see some serious leaps in battery technology for this to ever get off the ground. Current batteries and that many motors? Not going to happen. This idea goes on the shelf next to my perpetual motion machine.
 
Posts: 2132 | Location: south central Pennsylvania | Registered: November 05, 2008Reply With QuoteReport This Post
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Not having a pilot in your recorded, maiden flight says something. Having 40 engineers & nobody said 'fuck it, I'll fly it' is unbelievable.
 
Posts: 3297 | Location: IN | Registered: January 12, 2007Reply With QuoteReport This Post
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quote:
Originally posted by snidera:
Not having a pilot in your recorded, maiden flight says something. Having 40 engineers & nobody said 'fuck it, I'll fly it' is unbelievable.


Insurance costs for manned flight for an experimental platform are enormous. Moller ran into that in California. They had to have their unit tethered to have a pilot in it for later testing.
 
Posts: 2771 | Location: Northern California | Registered: December 01, 2006Reply With QuoteReport This Post
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Picture of JJexp
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Wow, it can lose three motors and still fly! I’d like to see it fly with half the motors out, like everything else does for certification.
 
Posts: 451 | Location: Hatboro, PA | Registered: May 25, 2016Reply With QuoteReport This Post
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If I could get a helipad on the roof at work, I’d just call it a flying car and go with that.


--
I always prefer reality when I can figure out what it is.

JALLEN 10/18/18
https://sigforum.com/eve/forum...610094844#7610094844
 
Posts: 2363 | Location: Roswell, GA | Registered: March 10, 2009Reply With QuoteReport This Post
Baroque Bloke
Picture of Pipe Smoker
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quote:
Originally posted by V-Tail:
<snip>
One hour endurance? FAA regs require 30 minute reserve fuel for daytime VFR flight, reducing the flight-plan endurance to 30 minutes, or 81 nm range. IFR regs require fuel to primary destination, plus divert to alternate, plus 45 minute reserve. One hour endurance does not provide for much of a flight.
<snip>

I would've guessed that VTOL capability would ease some of those requirements.



Serious about crackers
 
Posts: 8946 | Location: San Diego | Registered: July 26, 2014Reply With QuoteReport This Post
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What I see is a 10-15 million dollar comuter vehicle with a service range of 40 or 50 miles. In order for this to break even the person purchasing it would have to value their time in many 10 thousands of dollars per hour.

Another potential problem is those tiny "jets". Those things have to be spinning at a rather high speed and I have to wonder what happens if you were to fly into a swarm of small birds or even a swarm of insects such as Mayflies. Plug enough of those motors during lift off and the lack of any lift produced by forward motion means it will drop like a stone.


I've stopped counting.
 
Posts: 5647 | Location: Michigan | Registered: November 07, 2008Reply With QuoteReport This Post
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Picture of bigdeal
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quote:
Originally posted by V-Tail:
300 km range. That's just under 162 nm.

300 kph cruise. That's just under 162 kts.

Jet? Hah! Piston-powered V-Tail cruises 174 kts (198 mph), with almost five times the range.

One hour endurance? FAA regs require 30 minute reserve fuel for daytime VFR flight, reducing the flight-plan endurance to 30 minutes, or 81 nm range. IFR regs require fuel to primary destination, plus divert to alternate, plus 45 minute reserve. One hour endurance does not provide for much of a flight.

Rhino is correct. This aircraft is essentially useless.
And I'm sure that's in ideal conditions. Wonder what happens to the battery pack and range when its say 0 to 30 degrees outside, like is is all over the northern seaboard? I think this could more accurately be described as a 10 million Euro (or mark?) science project for a bunch of college geeks.


-----------------------------
Guns are awesome because they shoot solid lead freedom. Every man should have several guns. And several dogs, because a man with a cat is a woman. Kurt Schlichter
 
Posts: 33845 | Location: Orlando, FL | Registered: April 30, 2006Reply With QuoteReport This Post
Go ahead punk, make my day
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And I'll say in 25-50 years I can see an electric, pilotless Uber type VSTOL aircraft flying to your house to pick you up and wisk you away to your local bar.

This is a small step but like all firsts, it's going to be expensive and painful (for some).
 
Posts: 45798 | Registered: July 12, 2008Reply With QuoteReport This Post
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It's not a jet. It's electric ducted fans.

Airflow forward of the powerplants would be affected significantly, altering airflow over the wings. A dynamic change would occur with flap movement. Loss of engines wouldn't simply be loss of thrust, but also loss of airflow over the airfoil.

Clearly all powerplants couldn't run from the same electrical bus, and the potential complexity to ensure power redundancy to each side, and each critical area may prove more difficult than they think, if it's to be a truly safe multi engine aircraft.

With such a low speed and such a limited range, especially given that the only power is battery, I'd have real reservations about much other than flight directly over the field.

In the event a pilot runs out of electrical power (it will happen), how does that aircraft glide with all engines unpowered, especially as they are nearly full span on all lifting surfaces? How about flight control after complete power loss? It doesn't look like much of a glider.
 
Posts: 6650 | Registered: September 13, 2006Reply With QuoteReport This Post
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All the naysayers crack me up. Human nature I guess.

I love it, great idea. Of course it isn't "practical" at this moment, heck, it doesn't even exist in a certified and purchasable form (and may never) so what does it matter?

Could lead to some great innovations though. Especially paired with something like the uber-battery Fiskar says they developed that will be ready in 5 years. Double the range and re-chargeable in 5-10 minutes? Yeah, that would be practical, especially for a VTOL.




“People have to really suffer before they can risk doing what they love.” –Chuck Palahnuik

Be harder to kill: https://preparefit.ck.page
 
Posts: 5043 | Location: Oregon | Registered: October 02, 2005Reply With QuoteReport This Post
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quote:
Originally posted by Strambo:
All the naysayers crack me up. Human nature I guess.


Substitute "professionals" for "naysayers," and you'll be on the right track.

If you've ever been pilot in command with a complete power loss, or experienced an electrical loss, especially under adverse circumstances, you'll understand.
 
Posts: 6650 | Registered: September 13, 2006Reply With QuoteReport This Post
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Picture of bigdeal
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quote:
Originally posted by sns3guppy:
quote:
Originally posted by Strambo:
All the naysayers crack me up. Human nature I guess.


Substitute "professionals" for "naysayers," and you'll be on the right track.

If you've ever been pilot in command with a complete power loss, or experienced an electrical loss, especially under adverse circumstances, you'll understand.
Yep. V-tail and the other pilots can best weigh in on this, but I'll offer Strambo this little fact. I'm currently 54 years old. During my entire lifetime thus far, designers have worked toward the invention of personal flying transportation. After all those years, we are little closer today than we were when I was a child. Its going to take a major breakthrough in an alternative energy source and/or battery tech before anything like this is even a glimmer on the horizon.


-----------------------------
Guns are awesome because they shoot solid lead freedom. Every man should have several guns. And several dogs, because a man with a cat is a woman. Kurt Schlichter
 
Posts: 33845 | Location: Orlando, FL | Registered: April 30, 2006Reply With QuoteReport This Post
Age Quod Agis
Picture of ArtieS
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Well, physics is a tough mistress. The uninterrupted energy needed to keep something like this or the Moller in the air is significant.

Couple that problem with the desire to make these things compact so that they can be used in confined areas, parked efficiently etc, which naturally increases loads on all lifting surfaces, then add in redundancy for safety of those in the craft and on the ground and you have a very unattractive set of design parameters, with sufficient, reliable, cheap power being one of the primary concerns.



"I vowed to myself to fight against evil more completely and more wholeheartedly than I ever did before. . . . That’s the only way to pay back part of that vast debt, to live up to and try to fulfill that tremendous obligation."

Alfred Hornik, Sunday, December 2, 1945 to his family, on his continuing duty to others for surviving WW II.
 
Posts: 12776 | Location: Central Florida | Registered: November 02, 2008Reply With QuoteReport This Post
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quote:
Originally posted by bigdeal:
quote:
Originally posted by sns3guppy:
quote:
Originally posted by Strambo:
All the naysayers crack me up. Human nature I guess.


Substitute "professionals" for "naysayers," and you'll be on the right track.

If you've ever been pilot in command with a complete power loss, or experienced an electrical loss, especially under adverse circumstances, you'll understand.
Yep. V-tail and the other pilots can best weigh in on this, but I'll offer Strambo this little fact. I'm currently 54 years old. During my entire lifetime thus far, designers have worked toward the invention of personal flying transportation. After all those years, we are little closer today than we were when I was a child. Its going to take a major breakthrough in an alternative energy source and/or battery tech before anything like this is even a glimmer on the horizon.


And yet, the differences in out daily lives in other areas are staggering but at introduction the naysayers were in full effect. Cell phones comes to mind off the top of my head (why would anyone need a phone with them all the time?). Fiskar says they have the breakthrough in battery tech today (do they?)

How about electronic gun sights? I had an NCO refuse to use a CCO, so I ordered him to. After qualifying with it, he commented how much better it was and thanked me.

Anyway, my point is not to argue the current state of this, in-development and may never see the light of day, aircraft with pro pilots.

However, it is a very innovative approach and combined with some new battery tech could be viable in the near future. Or, it could spin off in a different direction. Or, it could be a monumental flop.

I like reading about new things and I guess just don't feel the need to sharp-shoot products that aren't even on the market.

Speaking of flying, it would have been funny to read internet threads about the development of heavier than air flight pre 1903! I'm such and such years old and never in my lifetime thus far has powered heavier than air flight happened. They keep promising it, but never works out. Wink

There is no question this thing can fly, only remains to be seen if it can be made safe and reliable, pass certification, and be produced at a price point allowing the company to stay in business...




“People have to really suffer before they can risk doing what they love.” –Chuck Palahnuik

Be harder to kill: https://preparefit.ck.page
 
Posts: 5043 | Location: Oregon | Registered: October 02, 2005Reply With QuoteReport This Post
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