Re: [electricboats] Throttle control head

A very fine installation Jesper!  Well done. 

Dan Pfeiffer

On 2024-03-06 10:51 pm, jesper.malmberg86@gmail.com wrote:

I kept the old throttle body and throttle cable but removed the shifter cable. As the throttle moves in the same direction whether or not in forward or reverse (on a diesel) I had a bracket fabricated and removed the funny-shaped one (don't have a picture of it but added one from the internet). With the new bracket the cable moves from neutral detent forward and aft. The detent is a bit 'firm' so a lot of the time I push the little button on the side which was used to just rev the engine without going into gear on the diesel. Some pictures attached.

Had the wig-wag-style throttle from TS been available when I did my conversion I would probably have gone with that. The benefit of the current setup is that all electronics is below in the engine compartment.

Re: [electricboats] Throttle control head

Yes, the detent in the Curtis throttle is a bit light to me and there isn't a detent in my lever control on the pedestal.  Of course you have a wee little knob like on a transistor radio to control the motor but I think a 6 ton boat should have an appropriately large and solid feeling control lever.  I have the lever but need some more heft on the feel.  And the lockout at OFF would be helpful especially with a feathering prop that could be damaged by too fast a shift from FWD to REV.  Of course the controller can be programmed to soften that with the acceleration curves but Sevcon doesn't make that easy to do without proprietary interface hardware and software.  But that's a different issue. 


Dan Pfeiffer

On 2024-03-06 8:46 am, Eric via groups.io wrote:

Thanks Dan, just seeing the Curtis in detail clears that up for me.  So it sounds like, other than needing a more solid detent for neutral, the action on it is pretty smooth then?  I'll probably need to buy a new set of dual lever/dual fuction throttle controls since the port side of my current one is pretty hinky.  Hopefully I can see a few in person and find one with a really solid neutral detent.  Appreciate the info!

Re: [electricboats] Throttle control head

I kept the old throttle body and throttle cable but removed the shifter cable. As the throttle moves in the same direction whether or not in forward or reverse (on a diesel) I had a bracket fabricated and removed the funny-shaped one (don't have a picture of it but added one from the internet). With the new bracket the cable moves from neutral detent forward and aft. The detent is a bit 'firm' so a lot of the time I push the little button on the side which was used to just rev the engine without going into gear on the diesel. Some pictures attached.

Had the wig-wag-style throttle from TS been available when I did my conversion I would probably have gone with that. The benefit of the current setup is that all electronics is below in the engine compartment.

Re: [electricboats] Throttle control head

Thanks Dan, just seeing the Curtis in detail clears that up for me.  So it sounds like, other than needing a more solid detent for neutral, the action on it is pretty smooth then?  I'll probably need to buy a new set of dual lever/dual fuction throttle controls since the port side of my current one is pretty hinky.  Hopefully I can see a few in person and find one with a really solid neutral detent.  Appreciate the info!

_._,_._,_

---

Groups.io Links:

You receive all messages sent to this group.

View/Reply Online (#32583) | Reply To Group | Reply To Sender | Mute This Topic | New Topic
Your Subscription | Contact Group Owner | Unsubscribe [newarmyguitar24@gmail.com]

_._,_._,_

Re: [electricboats] Throttle control head

I have the Curtis throttle and connected it by Morse-type cable to the original diesel gear shift lever on the steering pedestal.  Single cable.  Original shifting configuration was FWD-Neutral-REV.   The Curtis is basically the same FWD-OFF-REV.  There is a detent for OFF and I can feel that in the lever at the pedestal but it is not very pronounced and can be a bit difficult to find in some conditions.  I plan to fabricate something that makes the feel of the detent bigger but for now it functions and I have other more pressing issues.  I think ideally I would like something that locks in to the OFF position with a release that I have to engage to move the lever from OFF to either direction.  Something like what you have on the auto transmission shifter in a car.

I used the original gear shift lever because it says FWD and REV on it witch matches the function of the Curtis unit better than the Slow/Fast of the original throttle lever.  I had to adapt to that function being on the other side of the pedestal.  But that was made easier by removing the other lever. 

Some photos here:
http://dan.pfeiffer.net/10m/electric_drive_control_wiring.htm


Dan Pfeiffer

On 2024-03-05 9:15 am, Eric via groups.io wrote:

Hey all,

As mentioned in my earlier post, we're converting our 30-year old 48' cat to electric using a Thunderstruck kit (s)...long way to go, still in the planning phase.  I have a question regarding throttle/shift control at the helm. What are folks using to do this?  The Thunderstruck kit comes with the option of a Curtis ET-134 directional throttle if you choose to use your current control station that was used with the diesels.  Having not hooked one of these up, I'm just curious how that works?  Does it accept the 2 cables in the exact same way?  Obviously there's no gearbox, but the motor does need to get the signal to spin either forward or in reverse and how fast.

Again, not seeing the ET-134 in front of me AND never have dug into a throttle control body yet to see how it hooks up, I'm just curious how that works.  I'm probably overthinking it.  Or have you used other forms of control at the helm to better effect?  Keeping in mind also that mine needs to be a dual station since there will (eventually) be two electric motors.  I of course just want the smoothest control possible from the helm to the motors with as little garbage in the middle mucking things up.

Thanks!

[electricboats] Throttle control head

Hey all,

As mentioned in my earlier post, we're converting our 30-year old 48' cat to electric using a Thunderstruck kit (s)...long way to go, still in the planning phase.  I have a question regarding throttle/shift control at the helm. What are folks using to do this?  The Thunderstruck kit comes with the option of a Curtis ET-134 directional throttle if you choose to use your current control station that was used with the diesels.  Having not hooked one of these up, I'm just curious how that works?  Does it accept the 2 cables in the exact same way?  Obviously there's no gearbox, but the motor does need to get the signal to spin either forward or in reverse and how fast.

Again, not seeing the ET-134 in front of me AND never have dug into a throttle control body yet to see how it hooks up, I'm just curious how that works.  I'm probably overthinking it.  Or have you used other forms of control at the helm to better effect?  Keeping in mind also that mine needs to be a dual station since there will (eventually) be two electric motors.  I of course just want the smoothest control possible from the helm to the motors with as little garbage in the middle mucking things up.

Thanks!

_._,_._,_

---

Groups.io Links:

You receive all messages sent to this group.

View/Reply Online (#32581) | Reply To Group | Reply To Sender | Mute This Topic | New Topic
Your Subscription | Contact Group Owner | Unsubscribe [newarmyguitar24@gmail.com]

_._,_._,_

Re: [electricboats] long-tail boats

https://www.pbo.co.uk/gear/temo-electric-outboard-motor-tested-71589

On Thu, Feb 29, 2024 at 1:51 PM Steve Bull <steve.bull@gmail.com> wrote:

John, Great thought with a notion to "mount the motor with a belt drive to
the propeller shaft, so you can relatively cheaply adjust the "gear"
ratio to match the propeller for best efficiency and performance."

I look forward to reading more on this tread.

On Thu, Feb 29, 2024 at 2:59 AM John Kohnen <jkohnen@boat-links.com> wrote:

Where are you located, Mogjib? I assume you want to replace the gas
engine of an existing longtail setup with an electric motor, on a boat
type common in your locality. Many such boats are long, narrow and
canoe-like, and can be pushed very easily to decent speeds. Great
candidates for electric power. :o) As long as "decent speed" is fast
enough for you. <g> A friend of mine is planning to experiment with
electric power on a proa he built decades ago, though it will probably
end up with two outriggers and become more of a bangka...

As someone interested in the kinds of boats developed in different parts
of the world I'm looking forward to seeing the boat you want to convert,
and I'm sure interested in following your project.

My 2¢ worth of advice is to try to mount the motor with a belt drive to
the propeller shaft, so you can relatively cheaply adjust the "gear"
ratio to match the propeller for best efficiency and performance.
Mounting the electric motor directly to the propeller shaft, like the
gas motor, would be much simpler, but you'd have to try different
propellers until you find the one that works best. Though there are
calculations to help find a suitable propeller there still seems to be
some magic involved. ;o)

On 2/27/2024 10:20 PM, Mogjib Salek wrote:
> Hi Kev,
>
> How long would be a « short ride »? I need also a cost estimate! Any tip?
>
> Thank you all for your help!!
>
> On Wed 28 Feb 2024 at 01:13, Kev <captainyoung@gmail.com
> <mailto:captainyoung@gmail.com>> wrote:
>
>     If I understand correctly, you want to use the design of long tail
>     boats like this, but you want to switch from a gas engine to an
>     electric motor:
>     https://www.mdpi.com/wevj/wevj-12-00036/article_deploy/html/images/wevj-12-00036-g001.png

--
John <jkohnen@boat-links.com>
School days, I believe, are the unhappiest in the whole span of human
existence. They are full of dull, unintelligible tasks, new and
unpleasant ordinances, brutal violations of common sense and common
decency. (H. L. Mencken)

_._,_._,_

---

Groups.io Links:

You receive all messages sent to this group.

View/Reply Online (#32580) | Reply To Group | Reply To Sender | Mute This Topic | New Topic
Your Subscription | Contact Group Owner | Unsubscribe [newarmyguitar24@gmail.com]

_._,_._,_