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by Hillhater
Sep 28 2020 7:55pm
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 19
Views: 459

Re: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor

Amazing results justin.
At 1200 rpm you seem close to peak efficiency, but i wonder if a longer pitch prop would allow you to keep the 9-10 km/h speed whilst dropping the rpm below 900rpm and power down below <200W/km level ?
But , not so easy to trial different props on a sail drive ! :(
by Hillhater
Sep 28 2020 6:30pm
Forum: Battery Technology
Topic: Tesla battery day announcement
Replies: 45
Views: 1040

Re: Tesla battery day announcement

Perhaps Tesla will actively cool only the tops and bottoms of these 4680 cells? Actually I am very interested in presented Tesla CTV (cell to vehicle) design. They showed us that they would like to remove side cooling (cell cans will be glued together and acts as a supporting structure). But this a...
by Hillhater
Sep 28 2020 4:58pm
Forum: Electric Watercraft
Topic: 16-ft Runabout Electric Inboard Conversion
Replies: 1
Views: 39

Re: 16-ft Runabout Electric Inboard Conversion

I would guess that there would be more power lost in that outdrive than you would need to push that boat a 5 kt !. Ditch it to save a ton of weight.
A 50lb thrust electric trolling motor would drive the hull at that speed, but you could make something similar
by Hillhater
Sep 28 2020 4:45pm
Forum: E-Vehicles General Discussion
Topic: C Cab Hot Rod Power Advice
Replies: 422
Views: 26214

Re: C Cab Hot Rod Power Advice

Its called a “balance bar” set up and normally used to adjust the front to rear brake pressure.
Common on many kit built cars, typically like this....
Image
Or this remote pedal unit...
Image
by Hillhater
Sep 27 2020 7:59am
Forum: Battery Technology
Topic: Tesla battery day announcement
Replies: 45
Views: 1040

Re: Tesla battery day announcement

Musk will certainly be remembered for many achievements. But Remember , Tesla is not Musks brainchild, nor is the decision to use 18650 cells in their pack designs, Musk “bought” into Tesla after the company was established and those basic design decisions were made. The rational behind the 18650 ch...
by Hillhater
Sep 26 2020 10:20pm
Forum: Battery Technology
Topic: Tesla battery day announcement
Replies: 45
Views: 1040

Re: Tesla battery day announcement

It was obvious that they avoided mentioning energy density, but referred only to “Range improvements” .! That can be achieved with more capacity in the “PACK” They can get 5+ times the capacity in the bigger cell using existing cathode/Anode chemistry , and with the “tabless” design they should be a...
by Hillhater
Sep 26 2020 9:57pm
Forum: E-Vehicles General Discussion
Topic: United States Ends ICE
Replies: 7
Views: 201

FAKE NEWS !....Re: United States Ends ICE

Nowhere has anything close to this been stated !
And ..NO Ca will not be able to do it either .
by Hillhater
Sep 26 2020 8:18am
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 19
Views: 459

Re: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor

Very impressive result Justin.
Did you have any data logging on the motor, current, temp, rpm , etc ?
I would love to know what rpm gave you the 9.5kph ?
by Hillhater
Sep 26 2020 3:10am
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 19
Views: 459

Re: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor

Ah, ok..so with a few mods on the controller you should be able to achieve 3.5 kW continuous at the motor. But, unless i am reading that chart wrong, that is at 1154 rpm ? ..450rpm down on the original set up resulting in a drop in boat speed with the existing prop. Do you know what boat speed you w...
by Hillhater
Sep 25 2020 10:16pm
Forum: Battery Technology
Topic: Tesla battery day announcement
Replies: 45
Views: 1040

Re: Tesla battery day announcement

If the cells are as great as they say, it would be worth figuring out what kind of solvent dissolves the adhesive, and then reselling individual cells...... Has this not already been figured out for the M3 pack glued cells ? It is likely a similar material ? I'm pretty impressed with what Tesla's g...
by Hillhater
Sep 25 2020 8:04pm
Forum: Electric Watercraft
Topic: DC-DC converter for input voltage lower and higher than output voltage
Replies: 1
Views: 135

Re: DC-DC converter for input voltage lower and higher than output voltage

Why not just use a real charger like the IMaxB6 that takes DC input between 11-20v and output controlled charge for various pb cell configurations ? Lots of similar RC charger options under $40 https://www.ebay.com.au/itm/iMAX-B6-80W-6A-Digital-RC-Battery-Balance-Charger-Discharger-NiMh-Li-ion-Ni-Cd...
by Hillhater
Sep 25 2020 7:52pm
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 19
Views: 459

Re: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor

Hi Justin, excellent project but a question if i may.. Have you checked /tested the effectiveness of the motor to power the boat ? I am sure it will be work , but 1-2 kw seems marginal for a 25’ sailboat, especially if you anticipate open water excursions where sufficient power to overcome currents ...
by Hillhater
Sep 24 2020 7:14pm
Forum: Battery Technology
Topic: tesla tabless battery
Replies: 8
Views: 309

Re: tesla tabless battery

From the horses mouth ...

https://youtu.be/AqywRziE7pk
by Hillhater
Sep 24 2020 7:00pm
Forum: Battery Technology
Topic: Tesla battery day announcement
Replies: 45
Views: 1040

Re: Tesla battery day announcement

Whatever, Plenty of vehicles run happily past 1m km.(.most of them diesel trucks),..but sure some cars also (but not common) And ..Plenty of cars last 40+ years with basic maintenance on original running gear. ..BUT, very few cars last 40 years AND cover. 1mkm, of daily use, without some serious rew...
by Hillhater
Sep 23 2020 7:33pm
Forum: Battery Technology
Topic: Not quite a Satiator, but $89 delivered!
Replies: 8
Views: 340

Re: Not quite a Satiator, but $89 delivered!

Another budget option for multiple charge voltages , with user set voltage ( 24-90v), current (0_10A), capacity monitoring , etc and variable input voltage,...is the MPT 7210A ..600W capacity and available for <$40 ! https://www.wish.com/product/lcd-display-mpt-7210a-mppt-solar-panel-charge-controll...
by Hillhater
Sep 23 2020 6:11pm
Forum: Battery Technology
Topic: Tesla battery day announcement
Replies: 45
Views: 1040

Re: Tesla battery day announcement

A Snip fron som of the TBD feedback reporting .. Some researchers estimate that price parity, or the point at which electric vehicles are equal in value to internal combustion cars, is reached when battery packs cost $140 per kilowatt hour (kWh). Tesla's battery packs cost $219 per kWh in 2019 , acc...
by Hillhater
Sep 23 2020 4:56pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Cake Kalk , Ink , Ösa : Electric motorcycle, moped, mobile power station work bike..
Replies: 5
Views: 587

Re: Cake Kalk , Ink , Ösa : Electric motorcycle, moped, mobile power station work bike..

Looks like a neat bike..
...but jeez, that cantilever seat extension looks fragile ! :shock:
Am i missing something ?
by Hillhater
Sep 23 2020 7:52am
Forum: Battery Technology
Topic: Tesla battery day announcement
Replies: 45
Views: 1040

Re: Tesla battery day announcement

, the older the car the more issues arise, lets say you have a million mile battery, you want a car that will also last a million miles, with minimum repair/maintenance. That I think is sustainable approach A cheap million mile car, is even more delusional than a m’mile battery.. Think about it, . ...
by Hillhater
Sep 22 2020 7:38pm
Forum: Battery Technology
Topic: Tesla battery day announcement
Replies: 45
Views: 1040

Re: Tesla battery day announcement

My take away.. New 4680 cell format with 5 times the capacity ( 25 Ah ?) .. think of those little 150ml tonic water cans ) https://imagizer.imageshack.com/img923/6743/FrBWFI.jpg ...from a new production process and line capable of producing 20 GWh per year (200 mil cells ?). Tesla predict capacity f...
by Hillhater
Sep 22 2020 6:41pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 6137
Views: 338690

Re: Wind and Solar vs Coal, Gasoline, Nuclear

ZeroEm wrote:
Sep 22 2020 5:53pm
Let's just split water!
With what ??.....an axe ?
..but i guess you are thinking Electrolysis ...?
You may want to consider the practical costs of that approach too ! :wink:
by Hillhater
Sep 22 2020 3:53pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 6137
Views: 338690

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Hydrogen has been on ongoing topic just now, so as he says we get hydrogen from gas that's being wasted. Nice theory.....but not on a industrial scale,..... huge volumes of commercial gas are required “Cheap , Clean “ hydrogen is produced by burning gas to make steam, which is then used to reform m...
by Hillhater
Sep 22 2020 3:45pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: CAKE bikes ??
Replies: 1
Views: 110

CAKE bikes ??

by Hillhater
Sep 22 2020 3:08pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 6137
Views: 338690

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Ahh ! I see a major flaw in that discussion.. ........ leaks of natural gas, a major contributor to climate change....... So, I didnt bother reading any further ! :wink: Most hydrogen used these days is steam reformed from natural gas. ???... so what are you saying here..? What is the connection be...
by Hillhater
Sep 21 2020 12:07am
Forum: Large EV General Discussion
Topic: EV backhoe
Replies: 14
Views: 421

Re: EV backhoe

My motivation is a passion for all things electric. And the fact i may have a huge cast block that now needs to be pulled out takes to a machine shop and have the cylinders re sleeved, then a full engine rebuild. Lots of money and worse then that lots of time. If you have to keep the block in to ho...