Search found 1121 matches

by JimmY
Fri Jan 22, 2021 2:01 pm
Forum: Electric Power
Topic: Electric barrelback!
Replies: 21
Views: 371

Re: Electric barrelback!

Solar cells are close to the theoretical limit, which is not that great (<40% efficiency).

If you look around at the car conversions, it is a lot of mechanics and tinkerers trying to make something work. That is the appeal, not any environmental impact or great performance.
by JimmY
Thu Jan 21, 2021 2:52 pm
Forum: Electric Power
Topic: Electric barrelback!
Replies: 21
Views: 371

Re: Electric barrelback!

One more post... Here is a DYI speed boat conversion: https://www.youtube.com/watch?v=my0TX3INjSk The guy took a brand new engine off an I/O drive and put in a electric motor, 10 Tesla batteries, 2 controllers, and a heat exchanger for cooling. Cost was about $20000.00, so it was not outrageous like...
by JimmY
Thu Jan 21, 2021 2:29 pm
Forum: "I Wish I Had..."
Topic: Silicone bronze vs. composite fasteners
Replies: 2
Views: 65

Re: Silicone bronze vs. composite fasteners

I used the ring shank nails to assemble my frames per G-Len plans. When it came to attaching the plywood skins, I switched to SB screws since i didn't like the idea of hammering on my frame. I think the Raptor fasteners are mostly used in cold molding construction to hold the layers of plywood in pl...
by JimmY
Thu Jan 21, 2021 11:53 am
Forum: Electric Power
Topic: Electric barrelback!
Replies: 21
Views: 371

Re: Electric barrelback!

I agree with you, Roberta. As an engineer it would be a nice project and a lot of challenges to overcome, but for $10k to $15k you can get a new marine V8 with all the modern emissions controls, run it all day, refill it in a few minutes, and not have to worry about replacing the battery in 9 years....
by JimmY
Thu Jan 21, 2021 10:15 am
Forum: Electric Power
Topic: Electric barrelback!
Replies: 21
Views: 371

Re: Electric barrelback!

That Bruce 22 (Funny name) looks really cool. I'm not sure I would trust that company though: "* For ecological reasons, we no longer use wood in the construction of our boats since 2018." :( Did you look at the price though? The fast system starts $211,000.00 and a battery pack that will last 2 hou...
by JimmY
Wed Jan 20, 2021 8:31 pm
Forum: Electric Power
Topic: Electric barrelback!
Replies: 21
Views: 371

Re: Electric barrelback!

If you want more speed, you need more pitch or rpms. If you want power (to tow or move a heavy boat) you need more diameter. Ski boat, large prop with low pitch to get a good hole shot to get the skier out of the water and pull the load, but top end is limited. Speed boat, small prop with high pitch...
by JimmY
Tue Jan 19, 2021 8:09 pm
Forum: New Members, Please Introduce Yourself
Topic: Hello All
Replies: 6
Views: 145

Re: Hello All

Welcome, it may be worth a trip to Indiana to LLJohnson. They have a full selection of marine plywood and other boat building woods.
by JimmY
Tue Jan 19, 2021 8:25 am
Forum: Small outboards
Topic: Minnesota Squirt Build
Replies: 90
Views: 43320

Re: Minnesota Squirt Build

I used a nice SS bolt and washer, and left the heads exposed. It makes for easy access for any maintenance and adjustments.
by JimmY
Tue Jan 19, 2021 8:16 am
Forum: Electric Power
Topic: Electric barrelback!
Replies: 21
Views: 371

Re: Electric barrelback!

Hi NigeB, I can't directly comment on the 13-13 propeller for a boat. From my experience with electric model airplanes the pitch of the propeller is the main driver for the speed of the airplane (Pitch in inches x RPM ~= speed in mph), so I imagine there is a similar relationship for boat propellers...
by JimmY
Mon Jan 18, 2021 2:31 pm
Forum: Small outboards
Topic: Minnesota Squirt Build
Replies: 90
Views: 43320

Re: Minnesota Squirt Build

My controls, same OMC box is bolted through the carling and the handles come up through the deck.
by JimmY
Mon Jan 18, 2021 2:28 pm
Forum: Electric Power
Topic: Electric barrelback!
Replies: 21
Views: 371

Re: Electric barrelback!

HP is HP whether it is electric or petrol. https://www.torqeedo.com/us/en-us/products/inboards/deep-blue-100kw-2400i/000-01054.html Here is an electric inboard system from Torqeedo and is says this 100kW system is equivalent to a 135hp gas engine (shaft power). So the scaling factor of 1.369 looks r...
by JimmY
Sun Jan 17, 2021 9:04 pm
Forum: Hankinson designs
Topic: Norwegian Barrelback 20'
Replies: 73
Views: 16298

Re: Norwegian Barrelback 20'

Wow is right! Can't wait to see what you do to the deck!
by JimmY
Fri Jan 15, 2021 1:57 pm
Forum: New Members, Please Introduce Yourself
Topic: Re:recent join. Hello all
Replies: 2
Views: 221

Re: Re:recent join. Hello all

Welcome, lots of builders down under too. They should be able to help source a motor.
by JimmY
Thu Jan 14, 2021 12:04 pm
Forum: Miscellaneous
Topic: Selling on ebay
Replies: 5
Views: 223

Re: Selling on ebay

Shipping is the biggest pain. You can print labels at home from eBay after the sale and schedule a pickup, but you will need to box, measure, and weigh everything before posting if you want to allow eBay to calculate the postage. If you can use the flat rate boxes like suggested, this will help heav...
by JimmY
Mon Jan 11, 2021 8:47 pm
Forum: Power Boats
Topic: seat backs
Replies: 13
Views: 614

Re: seat backs

chugalug wrote:
Mon Jan 11, 2021 8:07 pm
Wonder if anyone thought of trying a power seat base out of junk truck.Up-down-forward -back -tilt even heat to warm your buns on a cold day. :roll: :roll: :roll:
I like the way you think! :D

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