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Ich habe mir überlegt einen zusätzlichen Elektromotor einzubauen. Hat das schon mal jemand gemacht?

(“I thought about installing an additional electric motor. Did anyone else do this before?”)

EiJa wrote: ↑Fri Jan 22, 2021 9:08 am Ich habe mir überlegt einen zusätzlichen Elektromotor einzubauen. Hat das schon mal jemand gemacht?

Depends on what purpose you have in mind?

• Some electric motors can be used to generate power, and would be a great way to recharge your batteries.
• As for extra propulsion, it would not pay off.
  1. The boat is already above hull speed. Even if you could double the drive force with the electric motor, you probably wouldn't gain even one knot.
  2. Electric motors take an incredible amount of battery power. A 100 pound thrust motor would take about 1800 watts of electricity. You would need at least 36 volts, thus three very expensive batteries... say 100 Ah AGM's. They could drive the boat for 1 hour. Unfortunately, 100 pounds of force would not even be noticeable if you were already sailing at 6+ knots from the wind.

Als Ersatzmotor und bei wenig Wind.

(“As a replacement motor and for when there is little wind.”)

EiJa wrote: ↑Sat Jan 23, 2021 12:48 am Als Ersatzmotor und bei wenig Wind.

I'm a real big proponent of going all electric. viewtopic.php?f=8&t=28020 It is very, very expensive!

https://www.torqeedo.com/us/en-us/products/outboards
This company I know has a good reputation, but is high-end. I reference it mainly because they have a full range of sizes and have all the other gear necessary including Lithium batteries. The biggest problem I have with all these electric motors companies, they avoid telling you clearly how much battery will drive it for how long. However, you can dig it out for yourself.

For instance: https://www.torqeedo.com/us/en-us/produ ... 32-00.html This motor and battery will set you back $7500. It'll run at full speed for about 50 minutes. You might reach 4 knots on an M or X.

Some other negative things to consider:

• What happens when you have tides/currents, can you overcome them?
• What happens when you run out of power? In a fuel boat, a fellow boater can give you a gallon or two and you're on your way. In electric, that can't happen. You'd require a tow.
• Even for the above tiny example, you could not recharge with solar panels. At least not with the number you could put on the boat. Which means, you'd need to recharge at a slip for at least 12 hours.
• If you have an M or X, you'd totally be giving up the high speed motoring. For some, that is no big loss, to others that's a deal breaker. Even for me... having 68 hours on my 60 HP outboard motor over 13 years (I mainly sail) I'd not give up that capability.

But in the end, it might make a lot of sense for your exact situation. If you have your own slip on a lake with AC power to recharge at night and you just need to get to/from the slip and you have $7500 (or equivalent) burning a hole in your pocket, I'd say its perfect.

Good luck.

Ich würde den nur als zusätzlichen Motor benutzen. Bei wenig Wind hätte man geräuschlos mehr Schub. Falls der Hauptmotor ausfällt, könnte man damit noch an Land kommen, bzw. in den Hafen fahren.

("I would only use that as an additional motor. With a little wind you would have more thrust without a sound. If the main engine fails, you could still come ashore with it or drive into port.")

As an additional motor / kicker motor... especially if you plan on having a dingy and can transfer it to/from it. I might consider it.

But the price would still not be worth it to me. Electric 6 hp w/ batteries for 50 minutes = $7500. Gas 6hp = $1400. To break even, you'd have to go about ten million miles on the gas motor.

Now if quiet is a major driver, you can justify it. For me, I can tolerate that much noise for a few minutes.
If ecology/green is your thing, and you're willing to spend another couple thousand dollars on solar (that won't fit on the boat) it would be great. If you charge from the power system, then you have consider how that was generated. If I understand correctly, Germany does get much of their power from wind generation, but here in the US... not so much.

I put an old Evinrude 40 lb thrust trolling motor on my 26D for a few weeks while I was searching for a new outboard last summer. I bought this little electric motor from a friend for $50 and it worked well enough for getting in and out of the marina but I only used it in VERY light wind. I am pretty sure 10+ mph wind or 3' swell would overpower the Evinrude. I do want to make a secondary mount that will slip over the boarding ladder to use it for fishing.

My Nissan and Tohatsu 6hp engines won't allow slower than 2.2 knots at idle. The electric motor topped out at about 2.5 to 3 knots and could be adjusted to go slower.

I didn't run the motor until my group 27 deep cycle battery was empty but I was able to get at least 45 minutes run time at full throttle. The few times I tried this setup, I used a 2nd deep cycle battery and brought long jumper cables with me in case the trolling motor battery died and I needed to use the house battery to get home. I am planning to keep the Evinrude on board as an emergency backup.

I wish electric was more viable because motoring in virtual silence is AMAZING, plus it's diminutive size fits on the motor well with a ton of room to spare.

svscott wrote: ↑Sat Jan 23, 2021 8:53 am My Nissan and Tohatsu 6hp engines won't allow slower than 2.2 knots at idle. The electric motor topped out at about 2.5 to 3 knots and could be adjusted to go slower.

Out of curiosity, at the other extreme of speed, what kind of speeds do you get with the 6 hp Nissan / Tohatsu on your 26D at WOT and whatever you consider comfortable noise/abuse throttle levels?

The gas engines at WOT (wide open throttle for those who don't know) top out at about 6.2 knots with limited wind and waves. I don't hesitate to run wide open for extended periods but ~3/4 throttle gives maybe 4.5 knots while still allowing some conversation in the cockpit without yelling. A couple years ago when I was changing carbs (5hp to 6hp) and props (regular to high thrust) on my 1998 Nissan, I had good intentions of logging boat speed vs. engine rpm on each change. Spoiler alert: I failed to follow through.

svscott wrote: ↑Sat Jan 23, 2021 9:17 am ... Spoiler alert: I failed to follow through.

Yeah, life happens.

Thanks.

As a way down on the bucket list type thing... dlandersson mentioned some canal trips in Europe, but I'm thinking there are some places like that here in the US also. I'd assume places like that would frown on a would-up 60 hp Mac blowing through and trying to get the big motor down to a steady wakeless speed sounds like a problem. I was thinking a re-engine with something like 6 hp might give enough speed and better economy.

Inquisitor wrote: ↑Sat Jan 23, 2021 9:31 am

svscott wrote: ↑Sat Jan 23, 2021 9:17 am ... Spoiler alert: I failed to follow through.

Yeah, life happens.

Thanks.

As a way down on the bucket list type thing... dlandersson mentioned some canal trips in Europe, but I'm thinking there are some places like that here in the US also. I'd assume places like that would frown on a would-up 60 hp Mac blowing through and trying to get the big motor down to a steady wakeless speed sounds like a problem. I was thinking a re-engine with something like 6 hp might give enough speed and better economy.

As for data logging, sailing and having fun took priority!

The Honda BF50 will move the X at around 2 knots at idle with decent MPG, so I don't think a kicker is totally necessary. For no wake zones I try for 4 to 5 knots. I don't know for sure but I imagine the Tohatsu SailPro or one of its clones has much better fuel mileage. I once motored 50 miles across Lake Erie to Port Dover, Canada and only used 2.5 gallons of fuel with my 5hp Nissan (tohatsu clone). My dad was in from California and we made the trip across the lake even though the wind didn't play along.

The Erie canal is only about 100 miles away from home and one of my bucket list trips (I've got several trips in mind, including a Bahamas run) is to leave Erie, PA and sail to Buffalo then lower the mast and make the slow scenic trek through the canal and locks to wind up in the Hudson River and NYC. I REALLY want to sail by the Statue of Liberty. See the skyline from water, and maybe check out Long Island Sound. That's part of why I recently bought the 26X (the biggest factor was it's LOW purchase price). The D would make the trip no problem but the X offers much better livability (especially for the Admiral) for a family of 3 on board for a few weeks. On this trip, I'd likely have my brother or a friend drive my Suburban and boat trailer to NYC or Connecticut for an easy return trip home.

I hadn't considered it before but maybe I'll mount a kicker bracket on the X since I've already got the extra motor!

Getting back to the electric motor thread.

I have no knowledge of electric motors as an outboard, or for that matter, electric motors for anything, so, one of our electrical engineers needs to say if this, or something similar, could be used in an emergency if the battery dies? I’m sure, someone other than myself, is wondering the same question.


Zurück zum Gewinde des Elektromotors.

Ich habe keine Kenntnis von Elektromotoren als Außenborder oder Elektromotoren für irgendetwas, also muss einer unserer Elektrotechniker sagen, ob dies oder ähnliches im Notfall verwendet werden könnte? Ich bin mir sicher, dass sich jemand anders als ich die gleiche Frage stellt.

Gentlemen:

The motor that EiJa showed in the picture is a 1 or 1.5 HP motor. I think the 26X would completely overpower it in any wind at all. That is, you would be swept downwind or down-current with the motor spinning hopelessly.

Chip Veres
s/v Sand Dollar

Ja, a mini-kota log shaft.