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John Pratt,
I built the ARRIBA from plans using electric propulsion, with a Hankai “5hp” motor and 12kWh of lithium battery, there are some pictures over in the ARRIBA builders forum. I know this is a late post and unlikely to find any traffic, but I’m super interested in the results of your power choice, and what the resulting performance is also. Can you share the details of running the boat? Also the magic prop…did you get one?
Thanks so much!!
Tim Economu
Hey website manager, I’m trying to leave pictures of the finished boat but I keep getting this message.
The files are standard 4M jpeg images…so not sure what the problem is.
t
Thanks John, my idea was to have a nice little eboat that could be also a good work boat for fishing and for many hours exploring Salish Sea. I think it worked out ok!
Tim
Yeah they could have given us 1:1 plot for easy cutting, but they expect you to take an architecture scale and loft that up to full size. Took a coupld of days to come up with the full size patterns using my method, and you are right, it could have been zero time since they already knew the size. It’s as if they wanted to save paper, and cut costs…as if we wouldn’t have paid a little more to get complete plans. I would build a Devlin boat if I were to do this again…his book and plans seem like a good deal to me.
I also contacted Doug via email when I started…it was crickets. My guess is that income from plans is so scant it doesn’t pay for customer support.
But overall building from plans is pretty special, I think you will like the build!
t
Hi Joe,
I spent quite a bit of time on them, and you are right, they could easily have been given in full size like the transom prints, but alas you have to
scale them from the drawings.
What I did was I took a picture of them, then imported the picture and scaled in cad. Then I could print sections out in 1:1 size to lay onto the material to cut sample bulkheads. I used 1/2 foam left over from a building project, it was easy and fast to cut.
Next step was to final fit into the boat using stir sticks and hot glue to get the final shape. This was finally layed on top of the marine ply to mark and cut the bulkhead for final fitting.
Its funny that they say the build is for beginners and it will take 200 hours. Not sure what that even means, I’m having fun but I’m so far over 200 hours I lost track!!
Tim
Thanks Doug, just got the battery box done today, now needs to be glued into the boat! The pack will be 48VDC, so 14 ea 3.6V, 300ah, EVE cells, for a total of 15kWh pack. Also tried on the 2.2kW motor (3hp continuous). Run time at full power is 6 hours…
Hi Graeme, where in En Zed? We had a lovely time on your islands a few years back!
So I’m flipping soon also, here’s a pick of primer and one finish coat. Let’s have a pic of your boat too ok?
t
Yep I read that also in the intro to the plans, which implies (and looks to me to be) a displacement hull, with the top speed limited to hull speed. But a curious person might have actually tried the boat with more power. My boat won’t have the drag of the daggerboard and rudder, so I’m wondering what that curious person may have found when they put more power on the transom. I’ve got a 8hp electric motor, so looks like I might be the first to find out. I will make sure to reinforce the transom, to handle the higher power. The motor is most efficient in the 2-4hp range, but we will see what happens at full power too!
t
“I know you’re not there yet but sharing early since I probably won’t renew my OCH membership again this next year.”
Yeah, sadly this is a big problem with a boat building forum that boat builders can’t access without a paywall…OK I will try to access you via private conversation, which won’t benefit anyone else down the road. How about Off Center open the forum to the rest of the world for free, while still charging for access to the huge video library?
t
Oh and related to the motor question, what transom height and motor length did you go with?
Thanks again!
t
Hi Ted,
What’s your top speed with the Epropulsion outboard? I’m assuming you have the Spirit 1.0 (1hp)?
That looks like a pretty nice motor, and it can take an external battery, which is nice for extended running.
t
Ted thank you so much!
Talking about head scratching…you just saved me a bunch! Those scarf’s look really nice, and on top of that you showed the glue-up jig you used. When I took delivery of the fancy plywood, the lumber yard added a top and bottom layer of 1/2″ CDX, that I now definitely will use to copy your jig. Thank you so much!
Thanks for the contact info too!
tim
Powering question for those with outboards on their Arriba.
What is the highest power you have tried on the boat? I’m planning on electric drive, somewhere from 1-3 kw, and I’m wondering if anyone has dared try a 5hp on this boat? One of my choices is a 5kw unit, which is way overkill, but it’s peak efficiency is in the 3kw range, or easily 5hp “petrol equivalent”. The next power step down is about 1.2kw or about 2hp, which would probably be fine…but that is full power which is never the best situation for any motor really.
t
Another plans question, how in the heck did you manage to scarf those 4×8 plywood panels to get your 140 inches long planks? My goodness!! I’ve been able to break up the keel panel boards into two smaller pieces, and I did build a jig for scarfing 4×8 panels…but but but they are SOOOOO big and cumbersome! I hear myself saying “if I’d only ordered the kit…”
OK…back to scarfing..
t
Ted (and any other plans builder out there listening) I am wondering about my next step. I’m cutting (after finishing scarfing) the chine, top and bottom panels from marine ply and I’m wondering if I need to cut them a little large, or are they already oversized and will need to be trimmed??
Since the kit already has these cut out of the plywood, the kit builders don’t have this issue. Maybe their panels are slightly oversized already?
OK, got the keelson pieces glued up and the epoxy is almost cured, so next up is shaping and attaching the little cleats that hold the keelson to the transoms.
t
Ted where do you keep the battery normally? Care to share any pics of the “battery compartment’?
Thanks!
Tim
