Search found 9574 matches

by Hillhater
Mar 25 2021 5:06pm
Forum: General Discussion
Topic: Lightweighting and aerodynamic optimization of a subcompact car.
Replies: 53
Views: 874

Re: Lightweighting and aerodynamic optimization of a subcompact car.

The reason it would not work on a car is because you're only lightening the car in relation to going upward. Going forward the full weight of the car is still pushing back on you Yes, exactly,..... it is the difference between “weight”. (Due to gravity),.. and Mass ( due to Density ) Toyota recomme...
by Hillhater
Mar 25 2021 12:08am
Forum: General Discussion
Topic: Tesla battery fire at repair shop, as shown on TV -old news from 2017
Replies: 19
Views: 376

Re: Tesla battery fire at repair shop, as shown on TV -old news from 2017

Yes, certainly a “Spinel short”. Can initiate a fire, ..but that would be isolated to a single cell without the “thermal runaway” effect of other close cells bursting into flame , despite no spinels ? The rapid explosive “Popping” of 18650 type cells in a pack fire is due to the heat transfer boilin...
by Hillhater
Mar 24 2021 11:34pm
Forum: Large EV General Discussion
Topic: Towing a directly powered EV conversion
Replies: 6
Views: 232

Re: Towing a directly powered EV conversion

No, not electrical drag, just mechanical. Having to spinup that (xx lbs) of motor armature to 4k+ rpm every time you accellerate , and even to keep it spinning is going to give significant drag. ..ever ridden one of those flywheel spin bikes in a gym ?. If it were me, i would put the rear whells ont...
by Hillhater
Mar 24 2021 7:34pm
Forum: Battery Technology
Topic: How do you find the 1 bad cell, of 74 in a brick Tesla S?
Replies: 24
Views: 695

Re: How do you find the 1 bad cell, of 74 in a brick Tesla S?

If this takes off, it will be a game changer for EV ownership..
..Much Cheaper to buy.
...battery failure risk mittigated
...recharge time a non issue..
viewtopic.php?f=34&t=110934
by Hillhater
Mar 24 2021 6:51pm
Forum: Large EV General Discussion
Topic: Towing a directly powered EV conversion
Replies: 6
Views: 232

Re: Towing a directly powered EV conversion

How far are you going to tow ?
Spinning that motor via the road wheels/ diff, etc willboth needa significantly higher tow force than a simple car with the Gearbox in nutral.
At the least your tow vehicle fuel usage will be increased.
by Hillhater
Mar 24 2021 7:25am
Forum: General Discussion
Topic: Tesla battery fire at repair shop, as shown on TV -old news from 2017
Replies: 19
Views: 376

Re: Tesla battery fire at repair shop, as shown on TV -old news from 2017

There is NO lithium metal in a typical EV battery. What is involved are LITHIUM OXIDES, and LITHIUM CARBONATE SALTS , an inert compound that does not burn and is infact prescribed as a medication in tablet form. What burns in a battery fire is the Organic Electrolyte solvents which are used to carry...
by Hillhater
Mar 24 2021 12:44am
Forum: General Discussion
Topic: Lightweighting and aerodynamic optimization of a subcompact car.
Replies: 53
Views: 874

Re: Lightweighting and aerodynamic optimization of a subcompact car.

The consumption standard i use is Litres per 100kms.....so.no confusion there. Sure you could make a lot of improvements, but if the goal is to reduce fuel usage etc , then a switch to a more efficient base vehicle should be an option... but i get your angle. OK. There are many other cars i could ha...
by Hillhater
Mar 23 2021 11:36pm
Forum: E-Vehicles General Discussion
Topic: Motorsport, Racing, The Future
Replies: 88
Views: 2158

Re: Motorsport, Racing, The Future

Well, that is certainly not what i was refering to !
I was refering to a Kart class with engines that cost $100 brand new ! .. 6.5 hp 200 cc 4 stroke generator type motors.
Like these.
by Hillhater
Mar 23 2021 6:50pm
Forum: General Discussion
Topic: Lightweighting and aerodynamic optimization of a subcompact car.
Replies: 53
Views: 874

Re: Lightweighting and aerodynamic optimization of a subcompact car.

So why not both.. both are ideal in any vehicle Priorities.... where do you spend most time <20mph or above ? I've driven all the hybrids on the market and hated how they handled, had sluggish power response, etc Really ? Even the Volt ?... i dont think it can be called sluggish .. (0-60 in under 7...
by Hillhater
Mar 23 2021 6:29pm
Forum: E-Vehicles General Discussion
Topic: Motorsport, Racing, The Future
Replies: 88
Views: 2158

Re: Motorsport, Racing, The Future

NO... .. by lottery i do not mean they win a motor, .. ..i mean everyone buys an identical stock standard motor (typically a “Clone” of the Briggs 6 hp industrial, costing about $100 ).. then they hand it over to the club “pool” of motors where it is “sealed” and numbered. Then Before racing, the dr...
by Hillhater
Mar 23 2021 5:59pm
Forum: General Discussion
Topic: Lightweighting and aerodynamic optimization of a subcompact car.
Replies: 53
Views: 874

Re: Lightweighting and aerodynamic optimization of a subcompact car.

Nep, Im sure you are aware that ar typical car speeds , <20mph, aero is FAR more important than any weight saving. Things like those wing mirrors, wheel covers, front splitter, undertray, rear spoiler ,..etc would all be higher on my priority list than trimming weight. ..Or, just trade it for a PIP ...
by Hillhater
Mar 23 2021 4:58pm
Forum: General Discussion
Topic: Early Teslas don't have a LVC. Inside the roadster battery pack!
Replies: 6
Views: 1050

Re: Early Teslas don't have a Low Voltage Cutoff- pack turns into a brick.

Old news... This was an issue with some of the earliest Mk 1 Roadsters (2008^~) , and caused by owners not sticking to the battery maintenance recommendations of periodic recharging if not used regularly. Tesla installed automatic alarms to alert owners and changed BMS controls on later versions. Th...
by Hillhater
Mar 23 2021 4:13pm
Forum: E-Vehicles General Discussion
Topic: Motorsport, Racing, The Future
Replies: 88
Views: 2158

Re: Motorsport, Racing, The Future

The grassroots side is far different. You HAVE to find ways to limit the ability to buy a race to keep costs down or else you are back at karting with a $20k/year engine budget. Speed is less important than close racing which can be participated in by people of average income. Every form of sport h...
by Hillhater
Mar 22 2021 9:56pm
Forum: General Discussion
Topic: Tesla battery fire at repair shop, as shown on TV -old news from 2017
Replies: 19
Views: 376

Re: Tesla battery fire at repair shop, as shown on TV -old news from 2017

I suspect the fire hose “run off” from any industrial fire is likely to be “Dirty” ...often even toxic. It is inevitable, and probably considered the lesser evil than an uncontrolled fire. But drenching lithium batteries in the surrounding area to those on fire, to cool and prevent them burning and ...
by Hillhater
Mar 22 2021 9:14pm
Forum: Large EV General Discussion
Topic: Tesla’s FSD not quite as expected !..
Replies: 1
Views: 229

Tesla’s FSD not quite as expected !..

road & Track comments on the latest FSD road trip video...
https://www.roadandtrack.com/news/a3587 ... dangerous/


Also..
by Hillhater
Mar 22 2021 7:51pm
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 43
Views: 7315

Re: 1988 Honda Prelude conversion - fastest build log ever.

Finger and toes crossed for you Jonescg.. There's about $20k worth of cells here gone to waste, and I need to make this car roll again. So I need to sell the race bike, or something. I'll own it. But it likely means I'll stop building batteries for people. I just can't afford the risk. :( Battery bu...
by Hillhater
Mar 20 2021 5:36pm
Forum: General Discussion
Topic: Tesla battery fire at repair shop, as shown on TV -old news from 2017
Replies: 19
Views: 376

Re: Tesla battery fire at repair shop, as shown on TV -old news from 2017

Gruber !.. one of the few companies that will repair Tesla batteries..
i wonder what their insurance premiums are now ??
But even in 2017, the fire dept had “no ideaa” how to tackle a lithium battery fire.. ??
... and just let it burn out !
..worrying !
by Hillhater
Mar 19 2021 11:33pm
Forum: Large EV General Discussion
Topic: 5 min EV battery swap system ..a new angle ?
Replies: 2
Views: 324

Re: 5 min EV battery swap system ..a new angle ?

There are bound to be many snags to work out.. not least being how to get different car makers to agree on a “standard” pack size , voltage, coolong system, BMS controls etc etc
AND, so far no mention of the cost to the end user !
by Hillhater
Mar 19 2021 11:20pm
Forum: E-Vehicles General Discussion
Topic: Motorsport, Racing, The Future
Replies: 88
Views: 2158

Re: Motorsport, Racing, The Future

EMTB will happen for sure..probably already is , somewhere ??
But it is a “niche” sport for athletic / physical competitors,..so not realla “Motorsport”
And it sure wont be cheap...have you seen the price of a competitive MTB, .. $10-15 _ !....never mind a EMTB !
by Hillhater
Mar 19 2021 8:55am
Forum: EV Business World
Topic: Hyundai Ioniq 5...
Replies: 4
Views: 437

Re: Hyundai Ioniq 5...

And Hyundais twin buddy has now revealed their new EV6...
by Hillhater
Mar 18 2021 11:43pm
Forum: Large EV General Discussion
Topic: 5 min EV battery swap system ..a new angle ?
Replies: 2
Views: 324

5 min EV battery swap system ..a new angle ?

I know its been tried before, but there are a few new twists with this AMPLE system ( which is already operating around the SF Bay area apparently.)....that could be a real step forward for EVs The biggest new angle is that the batteries are standard modules for all cars, and are NOT owned by the ca...
by Hillhater
Mar 18 2021 9:50pm
Forum: General Discussion
Topic: Converted my 10" pole saw to 14" with trash day chain saw
Replies: 15
Views: 549

Re: Converted my 10" pole saw to 14" with trash day chain saw

Thanks for the suggestions, ..needless to say i have considered most of them, and remembering i have several of these large palms ( in bad positions for their size,.)...and even tho’ i love trees, the simplest option is to “drop” them..as i already have with some. But then the trunks and roots are a...
by Hillhater
Mar 18 2021 7:32pm
Forum: EV Business World
Topic: Joby going public
Replies: 8
Views: 340

Re: Joby going public

Hmm ? It comes over as a thinly disguised cry for support and funding. !..... ! Hahhaha! still sour that you missed the boat on Tesla ?? Nope !.... I dont play the stock market.. at all ! And there is NO EV that is practical or realistic for my situation.........except for a few Ebikes . :wink:
by Hillhater
Mar 18 2021 7:24pm
Forum: E-Vehicles General Discussion
Topic: Motorsport, Racing, The Future
Replies: 88
Views: 2158

Re: Motorsport, Racing, The Future

They have to be careful developing a class for EVs. They do not adapt well to existing ICE series formats. The Formula E is probably the best “Showcase” for demonstrating Electric racing to the public. But even there the race length and the course layout is contrived to suit EV limitations. Races ar...
by Hillhater
Mar 18 2021 6:31pm
Forum: General Discussion
Topic: Converted my 10" pole saw to 14" with trash day chain saw
Replies: 15
Views: 549

Re: Converted my 10" pole saw to 14" with trash day chain saw

I have all these issues too.. A dozen or more Palms..some 10++ mts tall, Huge Eucalipts that drop big boughs ..i also have chainsaws, electric and gas pole saws, and one of those 10mtr manual extension pole saws. i have even tried “attaching” the electric pole saw to the telescopic manual saw pole ....