Re: [MBZ] Possibilities?

[Rich Thomas via Mercedes]

The stability and maneuverability of these things requires that they be 
controllable rapidly, which can be done with an electric motor. It would 
be interesting to see an analysis of putting a motor/generator on the 
thing, with some batteries for load balancing (is that the right term?), 
sorta like a diesel locomotive (but it doesn't have batteries), and see 
what the size and duration tradeoffs would be like.  They are unlike an 
airplane in that the lift is only from the rotors not the wings, so they 
take more power than that little airplane.


--R



On 9/5/15 9:12 PM, archer75--- via Mercedes wrote:

56 propeller copter:

http://www.theregister.co.uk/2015/09/04/quinquaquadcopter/

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Re: [MBZ] Possibilities?

[G Mann via Mercedes]

Zero auto rotation capacity with that design.. you likely notice his panic
when he climbed to about 20 ft altitude for a moment...

Propeller blade tip turbulence losses on that design have to account for
gigantic energy loss. The inclusion of a simple duct around each propeller
would increase thrust, reduce noise, and extend range... I believe..

Won't be flying it myself... in any case..

On Sun, Sep 6, 2015 at 3:55 PM, OK Don via Mercedes 
wrote:

> On Sun, Sep 6, 2015 at 5:11 PM, Craig via Mercedes 
> wrote:
>
> > There are some quadcopter drones which have computer control of position
> > and attitude. The fellow should incorporate that kind of stability
> > augmentation.
> >
> >
> >
> Yes, computer control is what makes these things viable - but do you want
> to be dependent on a computer to keep you from tumbling out of the air?
>
> Just like a helicopter (rotary-wing aircraft) needs more power than an
> > airplane (fixed-wing aircraft).
> >
> > Craig
> >
>
> Yes. Inefficient - having to beat the air into submission. Also, very
> little choice of where you are going to hit when the power fails - can't
> glide worth a darn.
>
> --
> OK Don
>
> NSA: The only branch of government that actually listens to US citizens!
>
> *“Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of
> our people need it sorely on these accounts.”* – Mark Twain
>
> "There are three kinds of men: The ones that learns by reading. The few who
> learn by observation. The rest of them have to pee on the electric fence
> for themselves."
>
> WILL ROGERS, *The Manly Wisdom of Will Rogers*
> 2013 F150, 18 mpg
> 2012 Passat TDI DSG, 44 mpg
> 1957 C182A, 12 mpg - but at 150 mph!
> ___
> http://www.okiebenz.com
>
> To search list archives http://www.okiebenz.com/archive/
>
> To Unsubscribe or change delivery options go to:
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>
>
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Re: [MBZ] Possibilities?

[OK Don via Mercedes]

On Sun, Sep 6, 2015 at 5:11 PM, Craig via Mercedes 
wrote:

> There are some quadcopter drones which have computer control of position
> and attitude. The fellow should incorporate that kind of stability
> augmentation.
>
>
>
Yes, computer control is what makes these things viable - but do you want
to be dependent on a computer to keep you from tumbling out of the air?

Just like a helicopter (rotary-wing aircraft) needs more power than an
> airplane (fixed-wing aircraft).
>
> Craig
>

Yes. Inefficient - having to beat the air into submission. Also, very
little choice of where you are going to hit when the power fails - can't
glide worth a darn.

-- 
OK Don

NSA: The only branch of government that actually listens to US citizens!

*“Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of
our people need it sorely on these accounts.”* – Mark Twain

"There are three kinds of men: The ones that learns by reading. The few who
learn by observation. The rest of them have to pee on the electric fence
for themselves."

WILL ROGERS, *The Manly Wisdom of Will Rogers*
2013 F150, 18 mpg
2012 Passat TDI DSG, 44 mpg
1957 C182A, 12 mpg - but at 150 mph!
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http://www.okiebenz.com

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Re: [MBZ] Possibilities?

[Craig via Mercedes]

On Sun, 6 Sep 2015 17:51:19 -0400 Rich Thomas via Mercedes
 wrote:

> The stability and maneuverability of these things requires that they be 
> controllable rapidly, which can be done with an electric motor.

There are some quadcopter drones which have computer control of position
and attitude. The fellow should incorporate that kind of stability
augmentation.


> It would be interesting to see an analysis of putting a motor/generator
> on the thing, with some batteries for load balancing (is that the right
> term?), sorta like a diesel locomotive (but it doesn't have batteries),
> and see what the size and duration tradeoffs would be like.

His 52 battery system is, hopefully, just a first cut on a proper system.


> They are unlike an airplane in that the lift is only from the rotors
> not the wings, so they take more power than that little airplane.

Just like a helicopter (rotary-wing aircraft) needs more power than an
airplane (fixed-wing aircraft).


Craig

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Re: [MBZ] Possibilities?

[OK Don via Mercedes]

Possibly, but even today's electric aircraft carry two people for an hour.
This one carries one for 10 minutes. However, the cost is WAY less than the
commercial aircraft. I'm more interested in an electric Cri-Cri myself . . .

https://www.youtube.com/watch?v=rkEHIv1o7u8

http://caev.weebly.com/e-cristaline.html

https://en.wikipedia.org/wiki/Electric_aircraft#EADS_Cri-Cri

On Sat, Sep 5, 2015 at 8:12 PM, archer75--- via Mercedes <
mercedes@okiebenz.com> wrote:

>
> 56 propeller copter:
>
> http://www.theregister.co.uk/2015/09/04/quinquaquadcopter/
>


-- 
OK Don

NSA: The only branch of government that actually listens to US citizens!

*“Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of
our people need it sorely on these accounts.”* – Mark Twain

"There are three kinds of men: The ones that learns by reading. The few who
learn by observation. The rest of them have to pee on the electric fence
for themselves."

WILL ROGERS, *The Manly Wisdom of Will Rogers*
2013 F150, 18 mpg
2012 Passat TDI DSG, 44 mpg
1957 C182A, 12 mpg - but at 150 mph!
___
http://www.okiebenz.com

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