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$1 billion BMS Ooops...



 
 
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  #21  
Old February 26th 21, 09:42 PM posted to rec.aviation.soaring
Dan Marotta
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Posts: 4,545
Default $1 billion BMS Ooops...

Went to the airport today. Wind was 40 degrees off at 27 gusting 33
kts. The gyro POH says 60 kmh is the max so I just helped my wife train
on her unicycle.

Dan
5J

On 2/26/21 9:58 AM, Dan Marotta wrote:
Yes, and I've been laid up for the past week after a horrific spill.* My
helmet and pads protected skin and skull, but not the ribs from a good
bruise.* Now it hurts to laugh (really) and I'm impatiently waiting for
the pain to subside so I can mount up again.* Pretty sure I can fly the
gyro without problems, but getting in and out of the thing will hurt...

Dan

On 2/25/21 3:38 PM, Darryl Ramm wrote:
On Thursday, February 25, 2021 at 12:34:46 PM UTC-8, Dan Marotta wrote:
Oh that is so last decade. I've got an InMotion V11 instead, and the
bruises to prove it!

Dan
5J
On 2/25/21 10:32 AM, Tango Eight wrote:
Now, where did I leave my Segway...


Electric unicycle that's adventurous as one of us old folks.... oh
remembers Dan has a gyrocopter... :-)

Ads
  #22  
Old February 26th 21, 10:14 PM posted to rec.aviation.soaring
Dave Nadler
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Posts: 1,597
Default $1 billion BMS Ooops...

On 2/25/2021 9:28 PM, G K wrote:
- I know of one being close. Look up Joby.


https://www.youtube.com/watch?v=4wbF...ture=emb_title

  #23  
Old February 26th 21, 10:16 PM posted to rec.aviation.soaring
Dave Nadler
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Posts: 1,597
Default $1 billion BMS Ooops...

On 2/25/2021 11:02 PM, Eric Greenwell wrote:
Dave Nadler wrote on 2/25/2021 5:07 PM:
On 2/24/2021 11:22 PM, Eric Greenwell wrote:
...Electric isn't the coming thing any mo it's here. The next
milestone will be passed when they start selling more electrics than
ICEs.


Eric, you've been drinking the Cool-Aid.
As I did once.
You're bringing your new electric machine to the Seniors, right?
And I do mean THIS year...


...They won't make the same mistakes that Lange made.


Except they already have.
GP delivered and then undelivered to USA a good example.
  #24  
Old February 26th 21, 10:24 PM posted to rec.aviation.soaring
Dgtarmichael
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Posts: 8
Default $1 billion BMS Ooops...

On Friday, February 26, 2021 at 3:42:33 PM UTC-6, Dan Marotta wrote:
Went to the airport today. Wind was 40 degrees off at 27 gusting 33
kts. The gyro POH says 60 kmh is the max so I just helped my wife train
on her unicycle.

Dan
5J
On 2/26/21 9:58 AM, Dan Marotta wrote:
Yes, and I've been laid up for the past week after a horrific spill. My
helmet and pads protected skin and skull, but not the ribs from a good
bruise. Now it hurts to laugh (really) and I'm impatiently waiting for
the pain to subside so I can mount up again. Pretty sure I can fly the
gyro without problems, but getting in and out of the thing will hurt...

Dan

On 2/25/21 3:38 PM, Darryl Ramm wrote:
On Thursday, February 25, 2021 at 12:34:46 PM UTC-8, Dan Marotta wrote:
Oh that is so last decade. I've got an InMotion V11 instead, and the
bruises to prove it!

Dan
5J
On 2/25/21 10:32 AM, Tango Eight wrote:
Now, where did I leave my Segway...

Electric unicycle that's adventurous as one of us old folks.... oh
remembers Dan has a gyrocopter... :-)



I don't understand the electric bashing. It's still a new and developing technology. By comparison I've never heard of an ICE motorglider that didn't have its own set of problems. Carburetors that don't tune, no parts for certain models, some that occasionally start fire, many that don't start at all. They're so bad that we're warned to NEVER expect them to work for a relight. You have to have them out and running before the pure gliders are even getting serious about looking for the spot to land. I'm a purest by nature and budget, but I'd never count out the future of electrics in soaring.. Mr. Nadler hate on Lange all you want it was Schemp-Hirth that almost killed you.

Doug
W24
  #25  
Old February 26th 21, 11:17 PM posted to rec.aviation.soaring
Eric Greenwell[_4_]
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Posts: 1,885
Default $1 billion BMS Ooops...

Dave Nadler wrote on 2/26/2021 2:16 PM:
On 2/25/2021 11:02 PM, Eric Greenwell wrote:
Dave Nadler wrote on 2/25/2021 5:07 PM:
On 2/24/2021 11:22 PM, Eric Greenwell wrote:
...Electric isn't the coming thing any mo it's here. The next milestone will be passed
when they start selling more electrics than ICEs.

Eric, you've been drinking the Cool-Aid.
As I did once.
You're bringing your new electric machine to the Seniors, right?
And I do mean THIS year...


...They won't make the same mistakes that Lange made.


Except they already have.
GP delivered and then undelivered to USA a good example.


Please note GP wasn't on my list of booths. I do expect the manufacturers that have been
building gliders for decades to have fewer stumbles, and I don't think it is an indictment of
the technology if a startup has problems delivering on time. It is always an extra risk to
order a glider that is not in production yet (also the case when I ordered my ASH26E), and even
riskier when it's a new manufacturer (GP, Lange), but for me, the GP15 is still a more
desirable glider than what the major manufacturers are offering.

So, I will repeat: Schleicher, Schmepp-Hirth, and Jonkers will not make the same mistakes Lange
made (perhaps I should add LAK and Pipistrel to the list).

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1
  #26  
Old February 26th 21, 11:43 PM posted to rec.aviation.soaring
Martin Gregorie[_6_]
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Posts: 671
Default $1 billion BMS Ooops...

On Fri, 26 Feb 2021 17:14:23 -0500, Dave Nadler wrote:

On 2/25/2021 9:28 PM, G K wrote:
- I know of one being close. Look up Joby.


https://www.youtube.com/watch?v=4wbF...ture=emb_title


Their timescale, payload and performance looks very similar to Vertical
Aerospace, https://vertical-aerospace.com/ except that VS are aiming for
a bit less range and speed, probably because they are looking at the UK
market rather than the US with its greater ride distances.

Do any of you know what sort of landing/takeoff patch these eVTOL air
taxis are planning to operate from, i.e. helipads to something more al
fresco such as carparks or schoolyards or are they planning to run door
to door operations, which may be a quite limited by availability of
landing areas in cities outside the US - unless, of course, their target
market is just airfield to airfield traffic.

I ask, because, although I've been dimly aware of efforts to build eVTOL
air taxis for a year or two, I've seen absolutely nothing about where
they expect to land when dropping off & picking up fares.


--
Martin | martin at
Gregorie | gregorie dot org

  #27  
Old February 27th 21, 04:25 PM posted to rec.aviation.soaring
[email protected]
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Posts: 4
Default $1 billion BMS Ooops...

An uncontained battery failure is as bad as an uncontained engine failure (car, airplane, or glider). Any potentially unstable battery like most Lithium chemistries should be in a safety container that will either contain or exhaust the fire, explosion, or heat. I would feel a lot better if the batteries were in a sealed stainless box with appropriate vents to the outside of vehicle.
Wit HZ
  #28  
Old February 27th 21, 04:48 PM posted to rec.aviation.soaring
Moshe Braner
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Posts: 95
Default $1 billion BMS Ooops...

On 2/27/2021 11:25 AM, wrote:
An uncontained battery failure is as bad as an uncontained engine failure (car, airplane, or glider). Any potentially unstable battery like most Lithium chemistries should be in a safety container that will either contain or exhaust the fire, explosion, or heat. I would feel a lot better if the batteries were in a sealed stainless box with appropriate vents to the outside of vehicle.
Wit HZ


I feel a bit nervous about carrying a "USB power bank" in the glider,
which includes a not-tiny lithium battery of the dangerous type. As for
the yuuuge batteries needed for electrically propelled gliders, I think
I'd wait for safer battery chemistry. LiFePO4 batteries are a lot
safer, and their energy density - and price - are being improved so that
they can compete with other types of lithium batteries. They are
already used in some electric cars.

  #29  
Old February 27th 21, 07:49 PM posted to rec.aviation.soaring
Eric Greenwell[_4_]
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Posts: 1,885
Default $1 billion BMS Ooops...

Moshe Braner wrote on 2/27/2021 8:48 AM:
On 2/27/2021 11:25 AM, wrote:
An uncontained battery failure is as bad as an uncontained engine failure (car, airplane, or
glider). Any potentially unstable battery like most Lithium chemistries should be in a safety
container that will either contain or exhaust the fire, explosion, or heat. I would feel a
lot better if the batteries were in a sealed stainless box with appropriate vents to the
outside of vehicle.
Wit HZ


I feel a bit nervous about carrying a "USB power bank" in the glider, which includes a not-tiny
lithium battery of the dangerous type.* As for the yuuuge batteries needed for electrically
propelled gliders, I think I'd wait for safer battery chemistry.* LiFePO4 batteries are a lot
safer, and their energy density - and price - are being improved so that they can compete with
other types of lithium batteries.* They are already used in some electric cars.

You should look at the Jonkers JS3 RES electric self-launcher using LiFePo batteries. It's the
only one I know of using that kind of battery.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1

  #30  
Old February 27th 21, 09:19 PM posted to rec.aviation.soaring
[email protected]
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Posts: 14
Default $1 billion BMS Ooops...

Eric,

I think that is probably a typo mistake, the voltage range and capacity is typical for 3000-3500 mAh li-ion cell.
 




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