Red Hot Pilot

"Big John" wrote in message
.. .

http://www.fan-tasticmodels.com/muller.wmv

On Sun, 30 Jan 2005 21:17:17 -0800, "aluckyguess" wrote in ::

I have a friend that can do that stuff. I was alright but nothing like those
guys.You can check some of his videos.
http://marktrent1.com/


Many thanks for the link to your friend's videos. His Giant Scale
aircraft is remarkable, however this one is a little more like the one
in the link provided by the OP:

http://www.nesail.com/detail.php?productID=1573

On Thu, 27 Jan 2005 20:44:21 -0600, Big John
wrote in ::


http://www.fan-tasticmodels.com/muller.wmv

Here's another: http://www.nesail.com/videos/quasar.mpg

Why does it take an electric motor to provide this sort of
performance?

Could this portend a future trend in manned aircraft?

Larry

There are some UAV's, now in test, that run on batteries.

Big John
`````````````````````````````````````````````````` ``````````````````````````````


On Mon, 31 Jan 2005 14:03:26 GMT, Larry Dighera
wrote:

On Thu, 27 Jan 2005 20:44:21 -0600, Big John
wrote in ::


http://www.fan-tasticmodels.com/muller.wmv

Here's another: http://www.nesail.com/videos/quasar.mpg

Why does it take an electric motor to provide this sort of
performance?

Could this portend a future trend in manned aircraft?

On Mon, 31 Jan 2005 15:12:17 -0600, Big John
wrote in ::

There are some UAV's, now in test, that run on batteries.

I know Aerovironment made one for the government powered by solar
cells. Are you referring to something else?

Basically, unlike only a short time ago, you can now pack more
horsepower and duration into a model with an electric power system
than glow power.....

My most powerfull models are electric.....

One reason for this is that the model can be built very light because
the structure does not have to secure and withstand the pounding of a
recriprocating engine....

My indoor model hovers at 30-40 % throttle..., and my Cloud Dancer
(with the old ni-cads) has unlimited vertical.

With a comparable li-po battery, it would be ballistic, and I would
have to land it when before I get tired...

We have come a long way...

Dave



On Mon, 31 Jan 2005 14:03:26 GMT, Larry Dighera
wrote:



Why does it take an electric motor to provide this sort of
performance?

On Mon, 31 Jan 2005 14:03:26 GMT, Larry Dighera
wrote:


Why does it take an electric motor to provide this sort of
performance?



On Mon, 31 Jan 2005 19:57:39 -0400, Dave
wrote in
::

Basically, unlike only a short time ago, you can now pack more horsepower and duration into a model with an electric power system than glow power.....

Are you sure about that? Are you aware of any 16 horsepower electric
motors on the model airplane market? Here's one that claims to output
16.5 hp: http://www.desertaircraft.com/engine...hp?Page=DA-150

My most powerfull models are electric.....

One reason for this is that the model can be built very light because
the structure does not have to secure and withstand the pounding of a
recriprocating engine....

So it's easier to increase the horsepower to weight ratio with
electric powered aircraft, because they don't have to be built so
stoutly?

My indoor model hovers at 30-40 % throttle...,

Isn't the increased control over throttled power output of electric
motors part of the reason they are beginning supplant IC engines in
some arenas? I would guess that the absence of exhaust emissions,
flammable fuel, noise, and starter are also part of the attractiveness
of electric power.

and my Cloud Dancer (with the old ni-cads) has unlimited vertical.

Right. From the videos I've seen, it looks as if the electric powered
aircraft hanging on their propellers are actually performing in "helo"
mode rather than using the wings' lift for flying.

With a comparable li-po battery, it would be ballistic, and I would
have to land it when before I get tired...

We have come a long way...

The advancements in battery technology and electric motor development
are remarkable. I'm just wondering if it is scaleable to manned
aircraft.

Basically, unlike only a short time ago, you can now pack more horsepower and duration into a model with an electric power system than glow power.....

Are you sure about that? Are you aware of any 16 horsepower electric
motors on the model airplane market? Here's one that claims to output
16.5 hp: http://www.desertaircraft.com/engine...hp?Page=DA-150

My most powerfull models are electric.....

OOPS!...I should explain further....
AIRCRAFT, not necessarily the ENGINE...

I have several models with more powerful engines.... but none with
the power/weight ratio of the electrics....



So it's easier to increase the horsepower to weight ratio with
electric powered aircraft, because they don't have to be built so
stoutly?

Yes....they have to be constructed only to support flight
loads/stresses... LOTS of wood blocks, hardwood and plywood goes
away......foam plastic and light plastic components appear in the
construction that would in no way survive the pounding of a recip
engine...


My indoor model hovers at 30-40 % throttle...,

Isn't the increased control over throttled power output of electric
motors part of the reason they are beginning supplant IC engines in
some arenas? I would guess that the absence of exhaust emissions,
flammable fuel, noise, and starter are also part of the attractiveness
of electric power.

....all correct.....I can idle an electric motor at speed you can count
the blades as they pass....and I had never had a motor completely fail
in flight.

The new "outrunners" do not require a gearbox in most applications..
only mechanical points of failure are the bearings...

and my Cloud Dancer (with the old ni-cads) has unlimited vertical.

Right. From the videos I've seen, it looks as if the electric powered
aircraft hanging on their propellers are actually performing in "helo"
mode rather than using the wings' lift for flying.

With a comparable li-po battery, it would be ballistic, and I would
have to land it when before I get tired...

We have come a long way...

The advancements in battery technology and electric motor development
are remarkable. I'm just wondering if it is scaleable to manned
aircraft.

Rats... that post went too soon.. I hate laptop KB's....

To continue....



Isn't the increased control over throttled power output of electric
motors part of the reason they are beginning supplant IC engines in
some arenas? I would guess that the absence of exhaust emissions,
flammable fuel, noise, and starter are also part of the attractiveness
of electric power.


Yes.. the lack of noise, exhaust, (can fly indoors), no oily gunk to
be cleaned off the model and less ground support equipment are a
given..


and my Cloud Dancer (with the old ni-cads) has unlimited vertical.

Right. From the videos I've seen, it looks as if the electric powered
aircraft hanging on their propellers are actually performing in "helo"
mode rather than using the wings' lift for flying.

Yes, we call it "3D" flying..and some models (and pilots) fly as if
there is no consideration given to the presence of gravity....



The advancements in battery technology and electric motor development
are remarkable. I'm just wondering if it is scaleable to manned
aircraft.


Dono Larry.....

Statistically, the next "breakthrough" in battery technology is only
two years away... and I am told by those who "should" know, that we
will soon see fuel cells in high end laptops...

I am amazed that we are "here"...already

Scaleable to "full size" ?

It seems possible, and even probable...

I expect it will happen..

Cheers!
Dave

On Wed, 02 Feb 2005 01:43:56 -0400, Dave
wrote in
::


are remarkable. I'm just wondering if it is scaleable to manned
aircraft.


Dono Larry.....

Statistically, the next "breakthrough" in battery technology is only
two years away...

What sort of "breakthrough" might that be?

and I am told by those who "should" know, that we
will soon see fuel cells in high end laptops...

I find that hard to believe.

I am amazed that we are "here"...already

Scaleable to "full size" ?

It seems possible, and even probable...

I expect it will happen..


It's getting a lot closer:
http://www.google.co.uk/groups?q=fue... ax.com&rnum=1

Statistically, the next "breakthrough" in battery technology is only
two years away...

What sort of "breakthrough" might that be?


No idea Larry,- this based on the historically shortening time
periods between "Breakthroughs" in battery technology...




and I am told by those who "should" know, that we
will soon see fuel cells in high end laptops...

I find that hard to believe.

So do I, BUT the Laboratory size fuel cells that have been successfull
are small, light, and will operate a modern laptop...

I am amazed that we are "here"...already

Scaleable to "full size" ?

It seems possible, and even probable...

I expect it will happen..


It's getting a lot closer:
http://www.google.co.uk/groups?q=fue... ax.com&rnum=1

Who knows what is next!

Dave