Re: [EVDL] Tesla Y Spare Tire location ?

[paul dove via EV]

Why would you. It a spare? I have had like 2 flats in 45 years


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On Sunday, May 16, 2021, 6:10 PM, Mark Hanson via EV  wrote:

Hi
I bought a model Y spare from Modern Spare on Amazon with jack/tools and was 
curious if anyone has a clever location to mount the spare tire other than the 
roof...  currently it’s just sliding around in the back like the Leaf and Bolt. 
 
Best regards
Mark

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Re: [EVDL] Tesla Y Spare Tire location ?

[Bobby Keeland via EV]

We bought a Tesla model 3 in May of 2019. Of course it did not have a spare
and we really did not worry about it. About a year ago I noticed that the
rear drivers side tire was low. There was a triangular piece of metal,
about 1/16th inch thick, stuck into the tread if the tire. It seemed to me
to be very unusual that a flat piece of metal could become imbedded in the
tire just by running over it. The metal would have needed to be stood on
one side?? I suspected that some “Tesla Hater” had placed it against my
tire while the car was in a big box store parking lot. As I drove away the
metal could have punctured the tire. Danny’s Tire World in Opelousas
repaired the tire. They even re-glued the sound deadening foam strip back
down within the tire.
I called the NOLA service Center and ordered a new rim and tire. We live
too far from NOLA to rely on any type of roadside service. I bought a low
profile jack and a lug wrench from an auto parts store, and some items to
cushion the jack against the bottom of the car (using the OEM holes on each
side) from EV Annex. I also carry a torque wench so that I can be sure that
the lugs are sufficiently tight. The jack, lug wrench, cushion pads and
torque wrench are stored in the frunk. The spare tire is in the back,
taking up space, but the rear seats can still be set up for use.
A Model Y should have more room to carry the spare. We may upgrade to a
model Y at some point.
Bobby Keeland
Arnaudville, LA

On Sun, May 16, 2021 at 6:46 PM Mark Hanson via EV 
wrote:

> Hi
> I bought a model Y spare from Modern Spare on Amazon with jack/tools and
> was curious if anyone has a clever location to mount the spare tire other
> than the roof...   currently it’s just sliding around in the back like the
> Leaf and Bolt.
> Best regards
> Mark
>
> Sent from my iPhone
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> Address messages to ev@lists.evdl.org
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[EVDL] Tesla Y Spare Tire location ?

[Mark Hanson via EV]

Hi
I bought a model Y spare from Modern Spare on Amazon with jack/tools and was 
curious if anyone has a clever location to mount the spare tire other than the 
roof...   currently it’s just sliding around in the back like the Leaf and 
Bolt.  
Best regards
Mark

Sent from my iPhone
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[EVDL] Cube vs square (was: The state of EV's 1890 to 1922m - cube)

[Bill Dube via EV]

The drag _force_ on your vehicle goes up as the square of velocity. F is 
proportional to V x V
    You go twice the speed, the drag force on your car increases by a 
factor of four.


The _power_ (horsepower) requirement due to drag goes up as the cube of 
velocity. HP is proportional to V x V x V

    You go twice as fast, the HP required goes up by a factor of eight.

The _energy_ required for a fixed distance goes up as the square of 
velocity.
    You go twice as fast you use four times the energy. -> At 40 mph 
you have a range of 80 miles, but at 80 mph your range is only 40 miles.


Bill D.


On 5/17/2021 8:16 AM, Robert Bruninga via EV wrote:

CUBE per Speed:

In my case, (Major east coast pipeline outage), the concern
was with energy used on a trip proportional to cube of speed.
I was trying to get my wife to slow down from 70 to 55
to make most of the 32 mile daily round trip for chemo
on battery in her (30 mile) plugin-Prius and not use -any- gas.
(70 to 55 would save HALF the energy (due to drag) for the highway portion).
Bob

On Sun, May 16, 2021 at 3:50 PM Robert Bruninga  wrote:

Although drag Force goes up by square of velocity, but then power equals force
times velocity, so the power to move in the presence of drag goes up as the
Cube of velocity.

On Sun, May 16, 2021  Peri Hartman via EV  wrote:

square of velocity. But, yes, not linear.
-- Original Message --
From: "Robert Bruninga via EV" 
Subject: Re: [EVDL] The state of EV's 1890 to 1922


Bingo, I re-read my email and when I said it goes up significantly
above 45, I omitted the fact (that you allude to) is that it goes up
as the CUBE of velocity., A huge factor.  Bob



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Re: [EVDL] The state of EV's 1890 to 1922m - cube

[Robert Bruninga via EV]

CUBE per Speed:

In my case, (Major east coast pipeline outage), the concern
was with energy used on a trip proportional to cube of speed.
I was trying to get my wife to slow down from 70 to 55
to make most of the 32 mile daily round trip for chemo
on battery in her (30 mile) plugin-Prius and not use -any- gas.
(70 to 55 would save HALF the energy (due to drag) for the highway portion).
Bob

On Sun, May 16, 2021 at 3:50 PM Robert Bruninga  wrote:
>
> Although drag Force goes up by square of velocity, but then power equals force
> times velocity, so the power to move in the presence of drag goes up as the
> Cube of velocity.
>
> On Sun, May 16, 2021  Peri Hartman via EV  wrote:
> >
> > square of velocity. But, yes, not linear.
>
> > -- Original Message --
> > From: "Robert Bruninga via EV" 
> > Subject: Re: [EVDL] The state of EV's 1890 to 1922
> >
> > >Bingo, I re-read my email and when I said it goes up significantly
> > >above 45, I omitted the fact (that you allude to) is that it goes up
> > >as the CUBE of velocity., A huge factor.  Bob
> > >
> > >On Sat, May 15, 2021 at 9:47 PM paul dove via EV  wrote:
> > >>
> > >>   None of that changes physics. You can lower the impact by aerodynamics 
> > >> but it still goes up proportional to speed and yes they aren't linear. 
> > >> the faster you go the faster the drag increases. Rolling resistance goes 
> > >> up as well but it is linear. I did a calculation for my conversion and 
> > >> the areo loading caught rolling at around 70mph with a dramatic change 
> > >> in the curve around 45 mph. It was a Toyota Celica so pretty good 
> > >> aerodynamics. I have the spread sheet somewhere if anyone is interested. 
> > >> It required about 21Kw at 70 mph.
> > >>
> > >>  On Friday, May 14, 2021, 4:56:48 AM CDT, Paul Compton via EV 
> > >>  wrote:
> > >>
> > >>   On Fri, 14 May 2021 at 03:28, Robert Bruninga via EV 
> > >>  wrote:
> > >>
> > >>  > Wind drag only becomes significant beginning at about 45 MPH
> > >>
> > >>  Tell that to a cyclist.
> > >>
> > >>  This was something that automotive designers used to say years ago and
> > >>  what they meant was...
> > >>
> > >>  We have so much engine power available, that aerodynamic drag isn't
> > >>  affecting vehicle performance until you exceed 45mph.
> > >>  They weren't much concerned with fuel economy.
> > >>
> > >>  Motorcycles have truly horrible aerodynamics,but some attempts at
> > >>  improvement have been made over the years. The Royal Enfield
> > >>  Dreamliner was one example and as well as top speed and economy, it
> > >>  actually improved acceleration, despite a 40 or so pound weight
> > >>  penalty.
> > >>
> > >>https://www.oldbikemart.co.uk/the-dreamliner-lives-on/
> > >>
> > >>  --
> > >>  Paul Compton
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Re: [EVDL] The state of EV's 1890 to 1922m - cube

[Robert Bruninga via EV]

Although drag Force goes up by square of velocity, but then power equals force
times velocity, so the power to move in the presence of drag goes up as the
Cube of velocity.

On Sun, May 16, 2021  Peri Hartman via EV  wrote:
>
> square of velocity. But, yes, not linear.

> -- Original Message --
> From: "Robert Bruninga via EV" 
> Subject: Re: [EVDL] The state of EV's 1890 to 1922
>
> >Bingo, I re-read my email and when I said it goes up significantly
> >above 45, I omitted the fact (that you allude to) is that it goes up
> >as the CUBE of velocity., A huge factor.  Bob
> >
> >On Sat, May 15, 2021 at 9:47 PM paul dove via EV  wrote:
> >>
> >>   None of that changes physics. You can lower the impact by aerodynamics 
> >> but it still goes up proportional to speed and yes they aren't linear. the 
> >> faster you go the faster the drag increases. Rolling resistance goes up as 
> >> well but it is linear. I did a calculation for my conversion and the areo 
> >> loading caught rolling at around 70mph with a dramatic change in the curve 
> >> around 45 mph. It was a Toyota Celica so pretty good aerodynamics. I have 
> >> the spread sheet somewhere if anyone is interested. It required about 21Kw 
> >> at 70 mph.
> >>
> >>  On Friday, May 14, 2021, 4:56:48 AM CDT, Paul Compton via EV 
> >>  wrote:
> >>
> >>   On Fri, 14 May 2021 at 03:28, Robert Bruninga via EV  
> >> wrote:
> >>
> >>  > Wind drag only becomes significant beginning at about 45 MPH
> >>
> >>  Tell that to a cyclist.
> >>
> >>  This was something that automotive designers used to say years ago and
> >>  what they meant was...
> >>
> >>  We have so much engine power available, that aerodynamic drag isn't
> >>  affecting vehicle performance until you exceed 45mph.
> >>  They weren't much concerned with fuel economy.
> >>
> >>  Motorcycles have truly horrible aerodynamics,but some attempts at
> >>  improvement have been made over the years. The Royal Enfield
> >>  Dreamliner was one example and as well as top speed and economy, it
> >>  actually improved acceleration, despite a 40 or so pound weight
> >>  penalty.
> >>
> >>https://www.oldbikemart.co.uk/the-dreamliner-lives-on/
> >>
> >>  --
> >>  Paul Compton
> >>www.paulcompton.co.uk (YouTube channel)
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Re: [EVDL] The state of EV's 1890 to 1922

[Peri Hartman via EV]

Ah, that makes sense. I think most people would calculate by distance 
traveled, because the overall concern is how much energy you'll use for 
a trip of a certain distance.


Peri

<< Annoyed by leaf blowers ? https://quietcleanseattle.org/ >>

-- Original Message --
From: "Willie via EV" 
To: ev@lists.evdl.org
Cc: "Willie" 
Sent: 16-May-21 10:28:40 AM
Subject: Re: [EVDL] The state of EV's 1890 to 1922



I encounter this square/cube controversy semi-regularly.  Let me make a feeble 
attempt at illumination.  Energy lost to wind drag does go up with the cube of 
the speed.  That energy lost is per unit time and does not account for extra 
distance traveled at higher speed.  On the basis of energy lost per unit 
distance traveled, the loss goes up with the square of the speed.

Clear? As mud?

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Re: [EVDL] The state of EV's 1890 to 1922

[Willie via EV]

On 5/15/21 11:35 PM, Peri Hartman via EV wrote:

square of velocity. But, yes, not linear.



From: "Robert Bruninga via EV" 



Bingo, I re-read my email and when I said it goes up significantly
above 45, I omitted the fact (that you allude to) is that it goes up
as the cube of velocity.


I encounter this square/cube controversy semi-regularly.  Let me make a 
feeble attempt at illumination.  Energy lost to wind drag does go up 
with the cube of the speed.  That energy lost is per unit time and does 
not account for extra distance traveled at higher speed.  On the basis 
of energy lost per unit distance traveled, the loss goes up with the 
square of the speed.


Clear? As mud?

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