FES&electric system batteries

On Thursday, February 23, 2017 at 6:40:38 PM UTC+3, Steve Leonard wrote:
On Thursday, February 23, 2017 at 5:27:10 AM UTC-6, krasw wrote:
Interesting that while current Kokam batteries for FES cost 8000 euros (2000eur/kWh), at the same time Tesla is building batteries costing under 200 eur/kWh. Assembling FES battery with new Tesla cells would cost one tenth, even doubling or tripling that would still keep it quite affordable. Why use so expensive battery?

I think this is where Bob K or Darryl R inserts pictures of Flaming Tesslas...

Pretty sure the percentage of Teslas going up in flames is no higher than for petrol powered cars, and only after crashes not before. We're not talking Note 7's here.

Tesla is CLAIMING to be building batteries costing under 200 eur/kWh...

At 21:59 23 February 2017, wrote:
Tesla is CLAIMING to be building batteries costing under 200
eur/kWh...


Here in EASA land I think there are substantial cost
implications to certifying "new(er)" batteries in an existing
certified FES sailplane (for Ultralights it's different). As current
FES performance looks pretty adequate why would the
manufacturers do it; it's not like there has been any radical
evolution in battery performance.
Dave Walsh

On Thursday, 23 February 2017 23:59:50 UTC+2, wrote:
Tesla is CLAIMING to be building batteries costing under 200 eur/kWh...

I'm sure the size of their project dictates that they can not be much off that price...

I think it's a couple things.

1- as soon as you add "aircraft" to a part description, the price goes up. That little stamp on a part has to be backed up by a mountain of paperwork, thus some of the price increase.

2-economy of scale. How many FES battery packs will be made in a year? How many Tesla battery packs will be made in a year? We should know that the more pieces made in a given time frame drops the per piece price.

With Tesla building their own plant, they should have a better handle on manufacturing costs and quality. Time will tell though.

Tesla makes all their profits off carbon credit games. Thus Tesla pricing might not match reality.

On Friday, February 24, 2017 at 8:03:41 AM UTC-6, wrote:
Tesla makes all their profits off carbon credit games. Thus Tesla pricing might not match reality.

Plus, they are selling 'vapor ware', what a concept! You give us $$$'s of your hard earned money for something that doesn't really exist yet (but we promise you a spot in the line, maybe). Call back in a couple of years. Oh, and buy our stock, will you?

Sounds a bit like the BD-5, doesn't it?

On 2/24/2017 8:26 AM, wrote:
On Friday, February 24, 2017 at 8:03:41 AM UTC-6, wrote:
Tesla makes all their profits off carbon credit games. Thus Tesla pricing might not match reality.
Plus, they are selling 'vapor ware', what a concept! You give us $$$'s of your hard earned money for something that doesn't really exist yet (but we promise you a spot in the line, maybe). Call back in a couple of years. Oh, and buy our stock, will you?

--
Dan, 5J

Don't think the BD-5 had massive government subsidies to help rich white
guys buy the things. Picking winners and losers didn't extend down to
the homebuilt GA market. Defense contractors, sure.


On 02/24/2017 09:34 AM, Dan Marotta wrote:
Sounds a bit like the BD-5, doesn't it?

On 2/24/2017 8:26 AM, wrote:
On Friday, February 24, 2017 at 8:03:41 AM UTC-6,
wrote:
Tesla makes all their profits off carbon credit games. Thus Tesla
pricing might not match reality.
Plus, they are selling 'vapor ware', what a concept! You give us $$$'s
of your hard earned money for something that doesn't really exist yet
(but we promise you a spot in the line, maybe). Call back in a couple
of years. Oh, and buy our stock, will you?

Rich white guys? How about people who simply work for a living as most
home builders are? Since you're a glider pilot you must be a "rich
white guy" too. Or are you a female, or a different color, or does it
really matter? Not to me. Is that you, Dave?

My point was that Jim Bede was always promising more than he could
deliver and asking the hopeful builders to hang in there.

On 2/24/2017 9:53 AM, kinsell wrote:
Don't think the BD-5 had massive government subsidies to help rich
white guys buy the things. Picking winners and losers didn't extend
down to the homebuilt GA market. Defense contractors, sure.


On 02/24/2017 09:34 AM, Dan Marotta wrote:
Sounds a bit like the BD-5, doesn't it?

On 2/24/2017 8:26 AM, wrote:
On Friday, February 24, 2017 at 8:03:41 AM UTC-6,
wrote:
Tesla makes all their profits off carbon credit games. Thus Tesla
pricing might not match reality.
Plus, they are selling 'vapor ware', what a concept! You give us $$$'s
of your hard earned money for something that doesn't really exist yet
(but we promise you a spot in the line, maybe). Call back in a couple
of years. Oh, and buy our stock, will you?



--
Dan, 5J