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Re: Epropulsion Navy 3.0 Propeller Dimensions

 

Let us know how it works out
I have an old 24v trolling motor Thai would like to increase the speed of too
Thx





On Sunday, January 12, 2020, 05:37, Keith M <penobscot17@...> wrote:

I would like to retrofit a higher pitch propeller on my 86# thrust trolling motor for a light weight (165# hull) semi-planing boat that is designed to go about 2X hull speed with very low thrust.? I have seen reference to the RC plane pusher props, but I am not convinced that the surface area and strength is robust enough for water applications.? The Navy 3.0 two bladed propeller,?N3-LU05-00, is within 0.1" of the diameter of my trolling motor and probably a little more than twice the pitch (10.2 ¡Á 6.73 inch).? The trolling motor RPM is 1,800 with no load, which is 500 less than the Navy 3.0 specification.? Examing the pictures, it looks like a good candidate.??Prior to spending the $50 plus shipping, it would be helpful to know if the propeller will fit.? The key measurements are the maximum hub diameter, shaft diameter, and the shaft length inside the hub from the pin to the front face.? I am also interested in alternative solutions or ideas...

The trolling motor is a brushed DC motor, so I believe there is no change in performance for clockwise vs counterclockwise rotation.? The wires are easily reversed on the output of the speed selector switch and the speed resistors are not sensitive to polarity.? I will also compare the current draw with the stock propeller vs the retrofitted propeller to prevent damage to the trolling motor.

Epropulsion Navy 3.0 Propeller Dimensions

 

I would like to retrofit a higher pitch propeller on my 86# thrust trolling motor for a light weight (165# hull) semi-planing boat that is designed to go about 2X hull speed with very low thrust.? I have seen reference to the RC plane pusher props, but I am not convinced that the surface area and strength is robust enough for water applications.? The Navy 3.0 two bladed propeller,?N3-LU05-00, is within 0.1" of the diameter of my trolling motor and probably a little more than twice the pitch (10.2 ¡Á 6.73 inch).? The trolling motor RPM is 1,800 with no load, which is 500 less than the Navy 3.0 specification.? Examing the pictures, it looks like a good candidate.??Prior to spending the $50 plus shipping, it would be helpful to know if the propeller will fit.? The key measurements are the maximum hub diameter, shaft diameter, and the shaft length inside the hub from the pin to the front face.? I am also interested in alternative solutions or ideas...

The trolling motor is a brushed DC motor, so I believe there is no change in performance for clockwise vs counterclockwise rotation.? The wires are easily reversed on the output of the speed selector switch and the speed resistors are not sensitive to polarity.? I will also compare the current draw with the stock propeller vs the retrofitted propeller to prevent damage to the trolling motor.
Trolling Motor Propellers

 

Higher pitch propellers for trolling motors seems to be a common theme on the internet, but I have not found much in the way of useful information to make decisions per the way forward.

?

I have a 165 pound semi-planing hull that will run about 10 MPH with a 2.3HP engine, and I would like to maximize the performance with an 86# thrust trolling motor (maybe 8 MPH).? Given a 1,152 watt brushed DC motor with an efficiency of ~80%, that is about 1.2 HP.? With a slower (1,800 RPM with no load) larger diameter propeller that is more efficient than the ICE counterpart, maybe it is approaching the performance of a 2HP outboard.? In any event, the goal is to maximize the speed of the boat with this particular trolling motor, rather than to spend thousands of dollars on an electric outboard.

?

There are many references to a thin cross-section blade with a large diameter being the most efficient, a key factor for electric boats.? However, Torqeedo and Epropulsion have more traditional looking propellers, although again with a larger diameter, so I cannot help to believe that their propellers are superior in some way (more rugged, larger surface area, etc.).? I would like to try the Epropulsion Spirit and Navy 3.0 propellers given the lower cost as compared to Torqeedo, a diameter similar to my stock propeller (10.1¡±), and propeller pitches in the 6¡± range (about right per the online propeller calculators).? However, there is not enough information (shaft diameter, distance from hub face to drive pin, and maximum outside hub diameter) to determine the mounting options in advance of purchasing.? If anyone has this information, it would be greatly appreciated, especially the maximum outside hub diameter.

?

It is common that folks dismiss these electric outboard propellers based on the direction of rotation.? I do not believe there is any degradation in the performance of a brushed DC motor with respect to the rotation direction, unlike some other DC motor configurations.? My trolling motor wire leads are easily reversed at the speed controller, and the resistor coils are not polarity sensitive.? If someone knows differently, please advise.

?

I also plan to try the RC plane pusher propeller (Masterscrew 15 x 7 as suggested in the Tech Ingredients hydrofoil catamaran), but I do not know what to expect for performance (are the blades strong enough, is there enough surface area, and will the airfoil shape of the blades cavitate at 1,800 RPM?).?? The good news is that the blades are inexpensive, come in many sizes and pitches, and are easily retrofitted (enlarge the hub hole, construct a backer plate/bushing that accepts the drive pin through the motor shaft, and reduce the diameter to match the rated current maximum of the motor).
Re: [Electric Boats] Battery Bank Charging >> How to run "hybrid" with a generator?

Bob Jennings
 

Sorry. Didn't know they were LifePo4's.?
Never mind :)


On Sat, Jan 11, 2020, 9:04 PM georgeo <go@...> wrote:
nope- ?for LiFePo4 batteries it is recommended to store them at 50%.? I¡¯ve done both ways over the years with my CALB 180AH ?(20 cells, 64V) either near full charge or about half charge and never see any difference on startup in the spring. Voltage essentially identical to how I leave it in the fall.

That¡¯s the beautiful thing with electric motor and lithium.? Turn off in the fall, pull battery cable, walk away- ?attach battery cable in the spring and motor to the slip. Just like 7 months of cold northern winter never happened. I¡¯ve not seen any self-discharge whatsoever through the winter.

Also, I have run perfectly in ¡°hybrid¡± fashion by running my 2kW generator connected to shorepower inlet.? I can go any speed- at low speed will also charge battery ; at full speed will have some of the energy from the generator and the rest from the battery. Or I can pick a speed to show zero charge/discharge for the battery- this was about 4 knots

George Ojdrovich
Tartan 34C with 5kW and 11.5kwH battery

On Jan 11, 2020, at 5:42 PM, Bob Jennings <heatnh@...> wrote:

Harley, not sure where you're located? but leaving batteries @ 50% SOC to sit over the "winter" will kill them. 50% SOC, they are subject to freezing. Just saying...

Bob


On Sat, Jan 11, 2020, 7:01 PM Harley Clark <clarkharley37@...> wrote:
Helpful report.?
I have a 10kw drive in my 1978 Tartan 34 with a 100 ah LIFEPO4 battery bank.
I wanted to extend my range so I bought a 2kw generator but have not used it , yet.
Just for the record, I have an Orion Jr. BMS with switching relays to limit charging and discharge.
This winter I am intentionally leaving the battery bank sit at about 50% charge to extend the battery life.
I have noticed that I can spin the propellor enough so I think it begins to cavitate. Have you experienced

On Fri, Jan 10, 2020 at 6:33 PM John Montgomery via Groups.Io <gotz2sail=[email protected]> wrote:
Hi,

I have a 5kw motor, 240ah bank at 48v. The charger I had at the time output 15a. I knew I was going to upgrade to a 25a charger. Sidenote, USBatttery eng. recommend a charger that can do 20% or slightly more of your amp hours. So the 15a was to small.?

Anyway, I ran the math. 48v at 25a is 1200w. 1200w at 120v is 10a. I found a generator at home Depot that ran 1600w continuous with an RV connector. I ran generator connected to my shore power connection. Charger ran 120v to 48v and then the buss.?

I clamped the battery leads and saw 0a, 15a from charger . Throttled up to say 20a, I'd see 15a from charger then 5a out of bank. Tada motor sailing/hybrid gen.

Kind of a sloppy set up but it worked. To do like your saying about gen to motor you'd need some kind of ac-dc drive. 120v in and 48v out with enough amp out to push you along. I'm powering a 30' Newport sailboat, 20a gets me going assuming I don't have a headwind ect. Think about what your pushing. Is 20a enough? If so you'll need something that can do 20a continous with spurts above that for a minute.

Hope I wasn't to confusing.





Re: [Electric Boats] Battery Bank Charging >> How to run "hybrid" with a generator?

 

¿ªÔÆÌåÓý

Sure, PbA batteries, but not an issue with lithium.

?

From: [email protected] [mailto:[email protected]] On Behalf Of Bob Jennings
Sent: Saturday, January 11, 2020 4:43 PM
To: [email protected]
Subject: Re: [electricboats] [Electric Boats] Battery Bank Charging >> How to run "hybrid" with a generator?

?

Harley, not sure where you're located? but leaving batteries @ 50% SOC to sit over the "winter" will kill them. 50% SOC, they are subject to freezing. Just saying...

?

Bob

?

?

On Sat, Jan 11, 2020, 7:01 PM Harley Clark <clarkharley37@...> wrote:

Helpful report.?

I have a 10kw drive in my 1978 Tartan 34 with a 100 ah LIFEPO4 battery bank.

I wanted to extend my range so I bought a 2kw generator but have not used it , yet.

Just for the record, I have an Orion Jr. BMS with switching relays to limit charging and discharge.

This winter I am intentionally leaving the battery bank sit at about 50% charge to extend the battery life.

I have noticed that I can spin the propellor enough so I think it begins to cavitate. Have you experienced

?

On Fri, Jan 10, 2020 at 6:33 PM John Montgomery via Groups.Io <gotz2sail=[email protected]> wrote:

Hi,

I have a 5kw motor, 240ah bank at 48v. The charger I had at the time output 15a. I knew I was going to upgrade to a 25a charger. Sidenote, USBatttery eng. recommend a charger that can do 20% or slightly more of your amp hours. So the 15a was to small.?

Anyway, I ran the math. 48v at 25a is 1200w. 1200w at 120v is 10a. I found a generator at home Depot that ran 1600w continuous with an RV connector. I ran generator connected to my shore power connection. Charger ran 120v to 48v and then the buss.?

I clamped the battery leads and saw 0a, 15a from charger . Throttled up to say 20a, I'd see 15a from charger then 5a out of bank. Tada motor sailing/hybrid gen.

Kind of a sloppy set up but it worked. To do like your saying about gen to motor you'd need some kind of ac-dc drive. 120v in and 48v out with enough amp out to push you along. I'm powering a 30' Newport sailboat, 20a gets me going assuming I don't have a headwind ect. Think about what your pushing. Is 20a enough? If so you'll need something that can do 20a continous with spurts above that for a minute.

Hope I wasn't to confusing.

Re: [Electric Boats] Battery Bank Charging >> How to run "hybrid" with a generator?

 

¿ªÔÆÌåÓý

nope- ?for LiFePo4 batteries it is recommended to store them at 50%. ?I¡¯ve done both ways over the years with my CALB 180AH ?(20 cells, 64V) either near full charge or about half charge and never see any difference on startup in the spring. Voltage essentially identical to how I leave it in the fall.

That¡¯s the beautiful thing with electric motor and lithium. ?Turn off in the fall, pull battery cable, walk away- ?attach battery cable in the spring and motor to the slip. Just like 7 months of cold northern winter never happened. I¡¯ve not seen any self-discharge whatsoever through the winter.

Also, I have run perfectly in ¡°hybrid¡± fashion by running my 2kW generator connected to shorepower inlet. ?I can go any speed- at low speed will also charge battery ; at full speed will have some of the energy from the generator and the rest from the battery. Or I can pick a speed to show zero charge/discharge for the battery- this was about 4 knots

George Ojdrovich
Tartan 34C with 5kW and 11.5kwH battery

On Jan 11, 2020, at 5:42 PM, Bob Jennings <heatnh@...> wrote:

Harley, not sure where you're located? but leaving batteries @ 50% SOC to sit over the "winter" will kill them. 50% SOC, they are subject to freezing. Just saying...

Bob


On Sat, Jan 11, 2020, 7:01 PM Harley Clark <clarkharley37@...> wrote:
Helpful report.?
I have a 10kw drive in my 1978 Tartan 34 with a 100 ah LIFEPO4 battery bank.
I wanted to extend my range so I bought a 2kw generator but have not used it , yet.
Just for the record, I have an Orion Jr. BMS with switching relays to limit charging and discharge.
This winter I am intentionally leaving the battery bank sit at about 50% charge to extend the battery life.
I have noticed that I can spin the propellor enough so I think it begins to cavitate. Have you experienced

On Fri, Jan 10, 2020 at 6:33 PM John Montgomery via Groups.Io <gotz2sail=[email protected]> wrote:
Hi,

I have a 5kw motor, 240ah bank at 48v. The charger I had at the time output 15a. I knew I was going to upgrade to a 25a charger. Sidenote, USBatttery eng. recommend a charger that can do 20% or slightly more of your amp hours. So the 15a was to small.?

Anyway, I ran the math. 48v at 25a is 1200w. 1200w at 120v is 10a. I found a generator at home Depot that ran 1600w continuous with an RV connector. I ran generator connected to my shore power connection. Charger ran 120v to 48v and then the buss.?

I clamped the battery leads and saw 0a, 15a from charger . Throttled up to say 20a, I'd see 15a from charger then 5a out of bank. Tada motor sailing/hybrid gen.

Kind of a sloppy set up but it worked. To do like your saying about gen to motor you'd need some kind of ac-dc drive. 120v in and 48v out with enough amp out to push you along. I'm powering a 30' Newport sailboat, 20a gets me going assuming I don't have a headwind ect. Think about what your pushing. Is 20a enough? If so you'll need something that can do 20a continous with spurts above that for a minute.

Hope I wasn't to confusing.





Re: [Electric Boats] Battery Bank Charging >> How to run "hybrid" with a generator?

[email protected]
 

Harley, not sure where you're located? but leaving batteries @ 50% SOC to sit over the "winter" will kill them. 50% SOC, they are subject to freezing. Just saying...

Bob


On Sat, Jan 11, 2020, 7:01 PM Harley Clark <clarkharley37@...> wrote:
Helpful report.?
I have a 10kw drive in my 1978 Tartan 34 with a 100 ah LIFEPO4 battery bank.
I wanted to extend my range so I bought a 2kw generator but have not used it , yet.
Just for the record, I have an Orion Jr. BMS with switching relays to limit charging and discharge.
This winter I am intentionally leaving the battery bank sit at about 50% charge to extend the battery life.
I have noticed that I can spin the propellor enough so I think it begins to cavitate. Have you experienced

On Fri, Jan 10, 2020 at 6:33 PM John Montgomery via Groups.Io <gotz2sail=[email protected]> wrote:
Hi,

I have a 5kw motor, 240ah bank at 48v. The charger I had at the time output 15a. I knew I was going to upgrade to a 25a charger. Sidenote, USBatttery eng. recommend a charger that can do 20% or slightly more of your amp hours. So the 15a was to small.?

Anyway, I ran the math. 48v at 25a is 1200w. 1200w at 120v is 10a. I found a generator at home Depot that ran 1600w continuous with an RV connector. I ran generator connected to my shore power connection. Charger ran 120v to 48v and then the buss.?

I clamped the battery leads and saw 0a, 15a from charger . Throttled up to say 20a, I'd see 15a from charger then 5a out of bank. Tada motor sailing/hybrid gen.

Kind of a sloppy set up but it worked. To do like your saying about gen to motor you'd need some kind of ac-dc drive. 120v in and 48v out with enough amp out to push you along. I'm powering a 30' Newport sailboat, 20a gets me going assuming I don't have a headwind ect. Think about what your pushing. Is 20a enough? If so you'll need something that can do 20a continous with spurts above that for a minute.

Hope I wasn't to confusing.

Re: [Electric Boats] Battery Bank Charging >

John Montgomery
 

Haven't had much of a change to go full throttle yet except pier side. Previous owner passed away and the boat was for sale about 4.5years. I've been going through it and tending to a hit list of stuff. With that being said I have gone full throttle pier side and rocked the boats next dock over. I did see /hear some cavitation. Not sure if it's effected by being tied up and boat not moving. FYI I have a 13x14rh prop. It's shot, replacing with 14x12rh. No reasoning behind different sizing other than it in new old stock and cheap..?

John


On Sat, Jan 11, 2020 at 4:01 PM, Harley Clark
<clarkharley37@...> wrote:
Helpful report.?
I have a 10kw drive in my 1978 Tartan 34 with a 100 ah LIFEPO4 battery bank.
I wanted to extend my range so I bought a 2kw generator but have not used it , yet.
Just for the record, I have an Orion Jr. BMS with switching relays to limit charging and discharge.
This winter I am intentionally leaving the battery bank sit at about 50% charge to extend the battery life.
I have noticed that I can spin the propellor enough so I think it begins to cavitate. Have you experienced

On Fri, Jan 10, 2020 at 6:33 PM John Montgomery via Groups.Io <gotz2sail=[email protected]> wrote:
Hi,

I have a 5kw motor, 240ah bank at 48v. The charger I had at the time output 15a. I knew I was going to upgrade to a 25a charger. Sidenote, USBatttery eng. recommend a charger that can do 20% or slightly more of your amp hours. So the 15a was to small.?

Anyway, I ran the math. 48v at 25a is 1200w. 1200w at 120v is 10a. I found a generator at home Depot that ran 1600w continuous with an RV connector. I ran generator connected to my shore power connection. Charger ran 120v to 48v and then the buss.?

I clamped the battery leads and saw 0a, 15a from charger . Throttled up to say 20a, I'd see 15a from charger then 5a out of bank. Tada motor sailing/hybrid gen.

Kind of a sloppy set up but it worked. To do like your saying about gen to motor you'd need some kind of ac-dc drive. 120v in and 48v out with enough amp out to push you along. I'm powering a 30' Newport sailboat, 20a gets me going assuming I don't have a headwind ect. Think about what your pushing. Is 20a enough? If so you'll need something that can do 20a continous with spurts above that for a minute.

Hope I wasn't to confusing.

Re: [Electric Boats] Battery Bank Charging >> How to run "hybrid" with a generator?

Harley Clark
 

Helpful report.?
I have a 10kw drive in my 1978 Tartan 34 with a 100 ah LIFEPO4 battery bank.
I wanted to extend my range so I bought a 2kw generator but have not used it , yet.
Just for the record, I have an Orion Jr. BMS with switching relays to limit charging and discharge.
This winter I am intentionally leaving the battery bank sit at about 50% charge to extend the battery life.
I have noticed that I can spin the propellor enough so I think it begins to cavitate. Have you experienced

On Fri, Jan 10, 2020 at 6:33 PM John Montgomery via Groups.Io <gotz2sail=[email protected]> wrote:
Hi,

I have a 5kw motor, 240ah bank at 48v. The charger I had at the time output 15a. I knew I was going to upgrade to a 25a charger. Sidenote, USBatttery eng. recommend a charger that can do 20% or slightly more of your amp hours. So the 15a was to small.?

Anyway, I ran the math. 48v at 25a is 1200w. 1200w at 120v is 10a. I found a generator at home Depot that ran 1600w continuous with an RV connector. I ran generator connected to my shore power connection. Charger ran 120v to 48v and then the buss.?

I clamped the battery leads and saw 0a, 15a from charger . Throttled up to say 20a, I'd see 15a from charger then 5a out of bank. Tada motor sailing/hybrid gen.

Kind of a sloppy set up but it worked. To do like your saying about gen to motor you'd need some kind of ac-dc drive. 120v in and 48v out with enough amp out to push you along. I'm powering a 30' Newport sailboat, 20a gets me going assuming I don't have a headwind ect. Think about what your pushing. Is 20a enough? If so you'll need something that can do 20a continous with spurts above that for a minute.

Hope I wasn't to confusing.

Re: [Electric Boats] Battery Bank Charging >> How to run "hybrid" with a generator?

John Montgomery
 

Hi,

I have a 5kw motor, 240ah bank at 48v. The charger I had at the time output 15a. I knew I was going to upgrade to a 25a charger. Sidenote, USBatttery eng. recommend a charger that can do 20% or slightly more of your amp hours. So the 15a was to small.?

Anyway, I ran the math. 48v at 25a is 1200w. 1200w at 120v is 10a. I found a generator at home Depot that ran 1600w continuous with an RV connector. I ran generator connected to my shore power connection. Charger ran 120v to 48v and then the buss.?

I clamped the battery leads and saw 0a, 15a from charger . Throttled up to say 20a, I'd see 15a from charger then 5a out of bank. Tada motor sailing/hybrid gen.

Kind of a sloppy set up but it worked. To do like your saying about gen to motor you'd need some kind of ac-dc drive. 120v in and 48v out with enough amp out to push you along. I'm powering a 30' Newport sailboat, 20a gets me going assuming I don't have a headwind ect. Think about what your pushing. Is 20a enough? If so you'll need something that can do 20a continous with spurts above that for a minute.

Hope I wasn't to confusing.
Amazing new electric boat motor based on fish fins

 

Amazing new electric boat motor based on fish fins - Plugboats


Ken G. Brown
Re: Electric boat for sale in Puget Sound

 

San Francisco Bau. Im making a short slide deck about it that I will be posting on Linkedin.


On Sun, Dec 22, 2019, 7:59 PM Jamie Storey via Groups.Io <storeyj29=[email protected]> wrote:
Hi Dale,

Where is the boat located on Puget Sound?

Jamie

Re: Electric boat for sale in Puget Sound

 

Hello Jamie,

She is located in Tacoma.


? ?? Dale
Re: Electric boat for sale in Puget Sound

 

Hi Dale,

Where is the boat located on Puget Sound?

Jamie
Wye Island Challenge Electric Boat Marathon - 2018 and 2019 results?

 

Does anyone have the results of the Wye Island Challenge for 2018 and 2019?
Thanks!
? -Terry
Re: 1900+ km in a Solar Electric Powered, Side Wheel Paddle Boat

 

Yeah I guess that year is busted too, which is why I was originally going to do it in June, but as with all things marine, stuff goes wrong. I guess 2021 I¡¯ll try again.
Re: 1900+ km in a Solar Electric Powered, Side Wheel Paddle Boat

 

¿ªÔÆÌåÓý

It appears that the locks will be closed July 1, 2020 through October 31, 2020.



On 11/22/2019 6:45 AM, clamk123@... via Groups.Io wrote:

I was actually going to do that in 2019, a solar-electric world record of The Great Loop, but as always, things got in the way of making the non-winter window, so instead I¡¯ll just cruise around Florida.

I believe the Great Loop is closed in 2020 for something going on with the locks in the northern part of the loop?

Re: 1900+ km in a Solar Electric Powered, Side Wheel Paddle Boat

 

I was actually going to do that in 2019, a solar-electric world record of The Great Loop, but as always, things got in the way of making the non-winter window, so instead I¡¯ll just cruise around Florida.

I believe the Great Loop is closed in 2020 for something going on with the locks in the northern part of the loop?
Re: 1900+ km in a Solar Electric Powered, Side Wheel Paddle Boat

 

Thanks for the kind words, but no, not even close to a record - even for the Murray River trip!

Some of the inspiration for our trip came from the 2 voyages made in the 1990's by Sunboat I and Sunboat II from Prince Alfred College in Adelaide. See .

I believe the dollar cost (without any equalising for inflation) of River Snail was something less than 10% of that of Sunboat II, reflecting the reduced costs of solar panels and electrics in the intervening 20+ years, as well as the somewhat more "agricultural" construction of RIver Snail.

I believe the Mundoo 3 Solar Electric (https://www.storerboatplans.com/boat/motorboats/electricsolar-power/example-of-solar-electric-real-world-use-liveaboard-boat-and-cartop-canoe/
?and ) has also cruised much of the Murray.

About the only claim we can make is that we are perhaps the first solar electric paddle wheeler to make the journey!

But it was a lot of fun...

Dave
Re: 1900+ km in a Solar Electric Powered, Side Wheel Paddle Boat

Robert Malcolm Kay
 
Edited

Hats off to him: these pioneers inspire new generations to challenge new boundaries.

One of my own heroines is the Breton, Anne Quemere: who attempted the almost impossible feat of traversing the Canadian Acrtic last year in a solar boat: her mission foundered, but her inspiraton lives on:?
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