I like the way you think! :-D

Dan

On 9/3/2018 3:06 PM, Skypilot wrote:[color=blue][i]
Hi Dan, all understood, all of the technology is here now other than the
small high capacitance cheap batteries. We have Tesla’s,
GP15’s, self launch Libelle’s and in my and your country
lots of sunshine. In fact one of our club legends who has been gliding
for 65 years drove his new Tesla to the club the other day from 220km
away. It took two days to recharge on the club mains power
I totally agree about the power and am the biggest supporter of nuclear
power but we shall leave that for another day. The prop drag is only
related to the torque attached to it, RATS have been around for ages, a
goverener in the prop hub will load up the elec motor and via reverese
current charge the battery, cleverer people than me will guess but it
will probably have to be a 4kt thermal or so. It will all come down to
the batteries and the various authorities allowing it to take place. You
will probably still have a power bill to pay for the grid to allow
society to function.

Dan Marotta;975487 Wrote:
That was a pretty interesting bit of science fiction.Â* And the
proceeding was not meant as criticism, only that most of the mentioned
technology is so far into the future that most, if not all of us will
never see it.

My one criticism is not acknowledging that it takes power to make power
(currently) and using a propeller to drive a motor/generator in flight
will create a LOT of drag which translates directly into sink rate.Â*
There's no free lunch yet, except in California.

On 9/2/2018 3:08 PM, Skypilot wrote:
I find all this stuff sexy, in Australia we all live in a bit of a
fantasy of energy, we export our LPG, Coal and Oil like it’s
going
out of fashion and the “green” movements of our parties
ensure that subsidies and grants are available to clubs and
organisations for being green. My home club of Kingaroy would be a
perfect site to go for a huge grant for four elec whinches 2xmain and
2x
retrieve. The runway area is 2000m x100m of grass right next to a
bitumen runway, there is power available within 200m of both winch
sites. The only problem is the fact that it’s a certified runway
with probably 1-2 private movements per hour, so the local Shire
council
are unlikely to approve winching. It’s a pity as there is a coal
mine 20km away and there is a planned coal mine next to the airstrip
and
we have elections soon. If there was ever a time to pitch an
alternative
to burning smelly dinosaur bones and reducing the noise foot print for
our solar powered sport now is it

I guess the panacea is to have an electric winch next to a battery bank
powered by solar panels. In Australia this is feesable given the space
and sunshine, BUT here is the crux - it’s battery technology.

The future will have elec self launch gliders, elec tow planes, elec
winches and all of this will be powered by a battery system that is
dual
use. The batteries will be in runway edges, house bricks and other
structural items not just a battery.

You will wake up in your house that is a storage facility hooked to the
grid, most of the time you will be a next exporter of energy.

Jump in your electric car and drive up to the field.

Unplug your elec self launch Libelle and plug your car in, your hangar
will have a storage battery bank in the wall bricks.

Tow your glider out to the runway with your elec golf cart and launch
into the wild blue yonder with your retractable self launch system with
prop goverening.

Once airborne you will go find a big fat thermal and redeploy your self
launch prop mast and reverse the prop to recharge your batteries
thereby
extending your range.

The next type of comps will be range comps that will allow much greater
distances and speeds, perhaps one day we will see solar panels on wings
that can feed power to the battery system built into the composite
fibres.

Fly until sunset and head to the clubhouse for a beer.

I just don’t understand why so many on here are negative to
people
trying to improve things, because let’s face it if we don’t
improve things our sport is dead.

Justin




--
Dan, 5J