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.
Search found 1121 matches
- Fri Jan 22, 2021 2:01 pm
- Forum: Electric Power
- Topic: Electric barrelback!
- Replies: 21
- Views: 371
- 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...
- 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...
- 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....
- 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...
- 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...
- 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.
- 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.
- 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...
- 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.
- 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...
- 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!
- 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.
- 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...
- Mon Jan 11, 2021 8:47 pm
- Forum: Power Boats
- Topic: seat backs
- Replies: 13
- Views: 614