Search found 2142 matches

by justin_le
Oct 06 2020 12:25am
Forum: Electric Watercraft
Topic: 16-ft Runabout Electric Inboard Conversion
Replies: 8
Views: 368

Re: 16-ft Runabout Electric Inboard Conversion

I am not too concerned with losses as this will only be used for short trips on small lakes. I calculated 1150 RPM needed. I will probably target something with some head room in case there is a lot lost in the outdrive. Lets say 2000 watts. What motor would you recommend with those inputs? Hmmm fo...
by justin_le
Oct 05 2020 11:59pm
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

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

Meanwhile i came across this (whilst burrowing down a YouTube “rabbit hole”) .. which i found interesting. https://imagizer.imageshack.com/img924/5456/VK5Qn6.jpg Its the test data from a “OceanVolt 8” electric saildrive fitted to a 36’ Pearson sail boat, ( The “Sailing UMA” series on UT, .. which y...
by justin_le
Sep 29 2020 3:53am
Forum: Electric Watercraft
Topic: 16-ft Runabout Electric Inboard Conversion
Replies: 8
Views: 368

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 !. This is also something that is easy for the OP to quantify! Just run the motor by itself to measure the no-load losses of the motor. Then hook it up to the outdrive and repeat the test...
by justin_le
Sep 29 2020 3:48am
Forum: Electric Watercraft
Topic: 16-ft Runabout Electric Inboard Conversion
Replies: 8
Views: 368

Re: 16-ft Runabout Electric Inboard Conversion

What would people recommend for a project like this? Would you ditch the outdrive or hook it up to a motor? It appears to be in working condition, may need new seals. The easiest DIY option would be to hook up an electric motor to replace the Mercruiser engine but leave the outdrive in place. That ...
by justin_le
Sep 29 2020 3:23am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4608
Views: 848302

Re: Cycle Analyst V3 preview and first beta release

It is a mode for tecnical terrain where the output relies on the torque input from the BB torque sensor, and not torque and rpm combined. Yes, actually more to the point I'm strongly considering in the next update that we just drop the watts/Hwatt scaling factor and have it instead be Watts/Nm. Thi...
by justin_le
Sep 29 2020 2:09am
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

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

Hmm ? You have thrown me a bit now. Why does the peak power change significantly on those charts ? Look at the % throttle setting. In the lower RPM chart with the higher pitch propeller I had to set the throttle to 56% in order that the 2000 watt input power point would happen at ~680 rpm, while wi...
by justin_le
Sep 28 2020 11:10pm
Forum: E-Bike Technical
Topic: Removing/locking the freewheel in an internally geared hub?
Replies: 10
Views: 1018

Re: Removing/locking the freewheel in an internally geared hub?

I was wondering the same thing, out of curiosity. Did the years bring any new insight here? Ha ha, that is quite a few years. The TDCM IGH motor has no problem at all doing regen since it's just a conventional direct drive hub motor, the 5 speed internal gears are just for pedaling and don't play i...
by justin_le
Sep 28 2020 10:01pm
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

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

Did you have any data logging on the motor, current, temp , rpm , etc ? Also I forgot to comment on the temperature. You can see the temperature in the motor data plot and it had time to reach steady state during the 2000 watt cruising but not during the power level trials when we were only ~5 minu...
by justin_le
Sep 28 2020 9:25pm
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

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 ? Yes, that is exactly what I want to know too! But I want to hold off thos...
by justin_le
Sep 26 2020 7:22pm
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

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

Did you have any data logging on the motor, current, temp, rpm , etc ? You'd sure think so eh? I had a data logger plugged into the CA3 on the 92km loop but unfortunately the TRS cable had a break in it and it didn't log any data which was too bad, especially since this was also the first time I go...
by justin_le
Sep 26 2020 4:09am
Forum: E-Bike Technical
Topic: Hub motor steady acceleration using Phaserunner?
Replies: 13
Views: 2785

Re: Hub motor steady acceleration using Phaserunner?

Hey Lioni, for sure feel free to post the CA3 and Baserunner settings here to have a look, but most likely what you are experiencing is just the actual behavior of a system that has a phase current limit. Right off the line the baserunner_L10 will do 80 amps (assuming you have 80A max phase setting)...
by justin_le
Sep 26 2020 3:55am
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

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

The first trip out with the updated motor mount was just pure bliss. The last time I'd taken the boat out was in January 2019 and we hauled out the diesel that spring, so it had been over a year and a half since the boat had power to leave the marina and it felt soooo good to be out on the water aga...
by justin_le
Sep 26 2020 2:55am
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

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

So how did this all play out in practice? After putting the boat back in the water all sanded and painted, I started to crank up the power levels and noticed quite a bit of shaft vibration once we got up to about 1500 watts. The boat was moving at a good clip but you could feel it rattling loudly th...
by justin_le
Sep 26 2020 2:02am
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

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 ? Ha, at this point yes indeed and I'll be sharing those results soon. But at the point when we filmed this first video it was still all theoretical that it should be OK....
by justin_le
Sep 25 2020 4:52pm
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

Batteries

For the battery bank I was a bit torn between running a whole bunch of 72V ebike batteries stacked in parallel, or getting some larger EV modules. The multiple-ebike packs keeps it in the theme of using ebike hardware for the build and gives tons of extra redundancy, but a few large EV modules might...
by justin_le
Sep 25 2020 3:48pm
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

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

Would the through axle design of the hub motor allow to stack 2 or more of these motors and slide a single axle through them while coupling the hub casings with an adapter between their brake rotor and cassette mounting holes? Thus creating a multi kW set up? Totally. In principle with the thru-sha...
by justin_le
Sep 25 2020 4:08am
Forum: E-Bike Technical
Topic: Analysis of regen on an ebike
Replies: 151
Views: 52530

Re: Analysis of regen on an ebike

Do elaborate Lebowski! It's great to be taught (or schooled) by someone who both understands and sees things on a totally different level like you. I and others have noticed anecdotally (but not quantifiably) that both hub motors and the controllers seem to get hotter doing regen at a give torque le...
by justin_le
Sep 25 2020 3:46am
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

Weight and Space Savings

How much weight? Obviously the engine itself was heavy, but there is a surprising amount of weight that is also associated with all of the control parts, plumbing, exhaust system, starter motor, alternator motor etc. I decided one evening just to lay everything out weight all the pieces one by one a...
by justin_le
Sep 25 2020 3:02am
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

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

Anyways while that was all ticking along and looking promising for the parallel e-drive, me and Arthur were busy disassembling and and cleaning the diesel engine. Yanmar on Cart.jpg Transmission.jpg The parts with salt water cooling were a bit rough but most of the rest seemed in excellent shape con...
by justin_le
Sep 25 2020 2:48am
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

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

For this parallel hybrid drive we needed to have the propeller shaft going right through the hollow axle of the All Axle motor with a coupling on one side to transmit rotational power, while the other side of the motor axle would need to have a torque arm secured to the boat frame. Luckily I'd had e...
by justin_le
Sep 25 2020 12:29am
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

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

That's a great market to break into if you like money. Ha ha, no kidding there is that, but hopefully there's also market of boat owning DIY'ers who are into getting stuff outside the conventional big $$ marine channels. Anyways I did a summary intro on this project a bit earlier this summer on ano...
by justin_le
Sep 23 2020 8:24pm
Forum: Electric Watercraft
Topic: Shamrock, 25 foot sailboat electric conversion with an ebike hub motor
Replies: 29
Views: 1385

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

I've been meaning to post details about a sailboat conversion project in this watercraft forum for a while now but life she is busy! Anyways, I'll let the video do the initial introduction
by justin_le
Sep 23 2020 8:06pm
Forum: E-Bike Technical
Topic: Analysis of regen on an ebike
Replies: 151
Views: 52530

Re: Analysis of regen on an ebike

Concerning this subject, here I would like to bring some concrete results of real life tests on a more specific point: Thank you Daniel for posting this and I'm always grateful to see real world test data coming in to either validate or disprove things that are predicted by the models. The case of ...
by justin_le
Sep 23 2020 6:43pm
Forum: E-Bike Technical
Topic: The wheel-building spoke-lacing thread, post your tips
Replies: 245
Views: 48883

Re: The wheel-building spoke-lacing thread, post your tips

When lacing a rear hub motor in a one-cross pattern with all the spokes exiting on the same side, do you put the spokes which are stretched on acceleration on the outside (like it is done in the Grin lacing YouTube video), do you put them on the inside or do you put them diffently on the right side...
by justin_le
Sep 23 2020 6:31pm
Forum: Battery Technology
Topic: The new GRINSPECTOR
Replies: 16
Views: 2995

Re: The new GRINSPECTOR

Another update, not yet released publicly, is that we have a build that can automatically communicate with a Satiator charger and select the appropriate profile for the battery you are about to charge, and that way you don't have to manually change between the 36V, 48V ,52V profiles etc., and it can...