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Gavin Watson
United States
เข้าร่วมเมื่อ 23 มิ.ย. 2013
Scarab 22 trimaran with E Propulsion Navy 3.0 and E 60 batteries.
Testing out the E Propulsion Navy 3.0 outboard and the three E 60 batteries on a Scarab 22 trimaran.
In the video I am doing some mental math checks on the system because the controller tends to show 99.9 miles of range at low speeds and then jumps down to 50 miles and less as I accelerate, so to make sure the numbers make sense I am dividing battery capacity at full charge of 9000 watts by the watts being drawn at that speed to get the run time and then multiplying run time by speed to get the range.
I did run a test at 500 watts twice but one of the videos did not record. The results were the same.
Edited by YouCut:app.youcut.net/BestEditor
In the video I am doing some mental math checks on the system because the controller tends to show 99.9 miles of range at low speeds and then jumps down to 50 miles and less as I accelerate, so to make sure the numbers make sense I am dividing battery capacity at full charge of 9000 watts by the watts being drawn at that speed to get the run time and then multiplying run time by speed to get the range.
I did run a test at 500 watts twice but one of the videos did not record. The results were the same.
Edited by YouCut:app.youcut.net/BestEditor
มุมมอง: 127
วีดีโอ
E Propulsion Navy 3.0 on 22 foot trimaran.
มุมมอง 10114 วันที่ผ่านมา
E Propulsion Navy 3.0 and three E 60 batteries on a 22 foot scarab 22 trimaran. 9KWH of battery capacity. in this video I just show the battery layout and connections. my initial tests show 45 nautical mile range at 5knots. 72 miles at 4 knots drawing 500 watts. 90 miles at 3 knots drawing 300 watts. 180 miles at 2 knots drawing 100 watts.
Electric boat construction video 38
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The aft section is upside down again, and the fiberglass is being applied to the lower side pieces.
Electric boat construction video 37
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Aft hull section has the lower part of the sides on it now
Electric boat construction video 36
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Forward and aft sections are set up to check alignment. Overview of progress so far. plywood and fiberglass are done for the aft section bottom of the hull.
Electric boat construction video 35
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All the framework is done for the aft section. getting ready to cut out the plywood for the bottom.
Electric boat construction video 33
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The bottom is on the forward section. It has been fiberglassed and is on the dolly ready to be moved outside.
Electric boat construction video 32
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The bottom plywood has been coated in fiberglass and epoxy and is ready to be installed.
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The chine is installed. Weep holes cut. Setting up to coat the plywood for the bottom with fiberglass and epoxy.
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Getting ready to install the chine. bottom plywood glued together
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I am starting to work on the bottom of the forward section. I am scribing and cutting the plywood to fit.
Electric boat construction video 28
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Outlining the outer edge of the hull and the waterline.
flipping the boat over
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flipping the boat over to start working on the bottom.
Working with epoxy for boat construction 101
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Working with epoxy for boat construction 101
Why not suspend the flexible solar panels, like trampolines between the rear of the floats and hull, behind the aft arms? Leave the Tramps clear. Your power vs speed curves are very impressive. My 4.5m sailing dinghy, uses around 200-250 watts to go 3 knots.
Nice installation of your battery bank. Did you get out in the Guider at all this year?
Yes I have been out in the Guider several times a week this summer. It is my favorite for a few hours of sailing by myself.
@@gavinwatson344 It is good to know you have been out on it. I enjoyed your build videos and have been watching for adventure videos but see you have been busy. Take care.
Looking good! Do you consider this a "step sharpie" like Bolger's Blondie Hasler, except a flat bottom? What is the most similar design that you know of that was built? (Lastnight I stumbled across the blondie hasler on triloboats (dave zeiger's site) I think he'd be really interested in seeing this.
Nice work
Hi how does this boat compare to a caledonia yawl?
very impressive! this seems like a really great idea!!!
Cool
Electric boat ????? surely April Fools,,,right ??? ha ha lets all go hug a tree
Nice progress
Thanks!
This is such a cool project. The waterline is intriguing. I can’t wait to see how she sits on the water.
Wild.
Yes it was close. Good thing I had the aft end on a pully system so I could raise it just a bit to clear the floor.
Honestly i didn’t think you had the room
Nice
Nice work
Looking good! With the deck on there it's really starting to fill up the space, even though it's only half! I like the gentle arch to the deck too, and the easy slot battery system
☝️ *Promo sm*
she trucks!
Nice progress
Nice
Nice progress
Thanks!
Awesome video to catch on lunch break. Project looking great. Such a smart design. Good weather here today so I’m doing my sloppy epoxy repair work outside. Sub optimal but super good enough. Cheers!
Looks great! Can’t wait to see it in the water!
Holy cow!
Looking good! It would be extra headache to post, but it sure would be cool to have some GoPro shots of you working.
Hi Gavin, thanks for sharing your work and for the informational videos. Can you speak about marine plywood vs balsa wood vs coosa board with epoxy and fiberglass use on DIY boat build projects? when and where to use one over the other etc ?
Thanks Taylan good suggestion I will do that.
Excellent documentation. I’m watching you build this and “Emma build birdie” … way different flavors, both are great. You should check her out. ✌️
Thanks for recommending her channel. I watched two videos. She is figuring it out. I so much want to give her two hours of this is how you should do these things like mixing epoxy and the consistency it should be after adding filler etc. It is going to be very tough doing it in a cold environment.
You are an excellent boat builder.
Looking great! Are putting a crouch cabin on this boat like the Idaho?
I am not sure yet. The plan for this year is to get it in the water and use it without any cabin. While we are testing range and functionality we will figure out what additional structure would suit us best. I am thinking a bit of a forward cuddy cabin and something to get under mid ship but I am not sure yet if that will be a flexible top or something more rigid. I would love to have some solar panels on a rooftop to augment our range (solar sailing) but I don't know how realistic that is yet. I also want to keep the weight down for anything high. Our son is 6'5" so if we have any standing headroom it will need to be up there.
I love that you can move batteries around to adjust ride. 😎
Yes I am a big fan of keeping things as flexible as possible.
Gavin, this project is so exciting. The prototype looks incredible. We will be following along and can't wait to see how she turns out! We own the Idaho by Phil Bolger and the TH-cam channel: www.youtube.com/@babybluesbybolger. Thanks for the kind mention.
Such a clean job / space! I’m doing a bottom repair right now outside and I’ve had to wait for good weather for epoxies and coatings. Awesome design!
Nice modifications for going electric!!! I have a buddy in port Townsend who wants to build an electric Idaho. I’m going to share your project with him! I can’t wait to see how this turns out. Are you doing a cabin? Great work!!
Great! I would be happy to talk to them about it if they would like to chat.
loving the simple geometry here
Looking like a good layout
Looking forward to following your progress and working with you when the time comes
Some good ideas in this design, but I bet you haven't done the buoyancy calculations yet. The first thing that you need is a weight table, with a summary of the positions and mass of the major components, including the hull, to be sure of freeboard, and wave control. I advise you to build a 1:5, or even larger scale , and use foam with glass skin to get proper hull and topsides scale weight. Plywood is way to heavy to create a proper scalable model. If you build an accurate scale model, you may get some useful data, but I strongly advise you to get a naval architect to supervise the final result.
Actually I did do the buoyancy calculations. It is not difficult and the numbers (other than the weight of the batteries) came out just a bit heavier than the Bolger Idaho design which is very similar in size and construction and exactly what I expected. Of course I also have the weight of the batteries factored in. This is not my first boat design or build.
Looking forward to this. Too big for me I want a single seater day boat for the Norfolk Broads I live in. Be great to see the techniques used.
Looks like a fun project. ummm. the video ummm is a bit ummm long ummm because ummm of all the ummm? looking forward to the next video.
Yes so sorry. I know I do that a lot. I am not going for a good quality video. This is about the boat and getting the videos out there to anyone interested in something like this. Time I spend editing or doing retakes is time not working on the project. If I was more clever I could probably get an AI to fix it for me.
Just got you in my recommended feed, really fantastic work!
Thanks so much!
awesome.
Lots of flotation! Bravo!
A beautiful day to be out on the water! I'm reading the article that just came out in Small Boats Magazine, and am fascinated with your modified Guider. Sort of a poor man's Rozinante? (But not =very= poor, as all the supplementary kit bits from CLC add up to around $10K!) I like it a lot!
Nice build. Less "um", thanks.
Enjoyed watching your build
Super Slick! Did CLC help with these modifications or did you figure it all out yourself? Do you have any major trips planned?
Thanks the modifications were all my planning and doing. I hope to do some cruising around Penobscot Bay this fall.
p͎r͎o͎m͎o͎s͎m͎ 🌷
Do you have full length battens to hold up the head of the sail? Looks great!
Yes full length battens. Both are round fiberglass rods. One of the battens is 1/2" diameter and is parallel to the mast. The other is 1/4" diameter and is diagonal from the tack to the aft corner of the head and winds up in a spiral around the mast.
Where?
I am in Pulpit Harbor North Haven Island Maine.
I am in Pulpit Harbor North Haven Island Maine.