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I the mid 80's I would take a hydrofoil ferry from Hong Kong to Macao. I believe Boeing made them. I don't know the fate of the boats but so many people went to Macao to gamble that Macao immigration insisted you had a round trip ticket to board the boat so you didn't end up penniless and...

I'm certainly not a speed freak, there is reason my boat is named "Nowhere Fast"

Bob, Good questions with no easy answer. With a good 3 ph brushless DC motor design there is only a small penalty in efficiency in running a 20 hp motor at a 3 hp point. The bigger question is what is the advantage of having all that reserve hp. Power required goes up as the cube of boat...

Bob, I like your boat design but I think you will still have range issues. 240 amp-hour, 48 volts is only 11.5 kW-hours. Six hp is ~4.5 kW which would drain the battery in about 2.5 hours which does not give you much range at the slow speed. I'v worked in electric boat propulsion (autonomous...

Work is intruding into life so Tango and I will not be able to attend the Friday Harbor event this year.

I also believe that 40 hp (with appropriate prop) would be minimum needed if you wanted to get up on plane and maybe achieve 12 to 15 knots. But with such a motor and the full battery set from (for example) a Chevy Bolt (which has about a 300 mile range on the road), you would completely drain...

Any all electric boat the size of 22' cruiser would need Li batteries (unless it was a submarine where you need the extra ballast). And yes, today it would be very expensive unless you only used the boat for short sunset cruises. But in 5 to 10 years, we shall see.

I have a 5 hp Mercury with a high thrust prop with will push my 22' cruiser at 4.3 knots with is almost 5 mph. That is on a lightly loaded boat (one passenger and a dog)

It has been my experience that an inverter will often fail to save your fuse.

I added round port holes just forward of the navigation lights. These not only mitigated some of the 'cave' like feeling of the v-berth but improved ventilation when opened.

I also like a paddle wheel on my transducer for a speed signal for all the reasons Hardee mentioned. Out of curiosity, I compared my paddle wheel speed indication with GPS speed-over-ground. On a calm day on a calm lake I went back and forth at various speeds and recorded speed and SOG (I was...

Thanks Gary, I'll be there!

I wouldn't complain too much about the BoatUS $25 fee. I just went through the FCC for my MMSI (since I plan on boating in Canada and maybe Baja). The cost was $220, which includes an unneeded ship radio station license. The bureaucratic maze with the FCC was not a pleasant experience as well.

Thanks Gary, I'll give them a call. Karl

I recently learned the VHF in my boat was programmed with a phony MMSI (if it was real it would have been issued in Croatia?????). I've just got a new MMSI issued from the FCC but now I need to send the radio back to Uniden so they can wave their magic wand over it so I can program my new MMSI...

What a tragedy. I looked at the data from the Newport buoy and the swell was over 10' that morning.

You should always use a power cable that is rated for 30 amps if you are connecting to a 30 supply even if your internal main breaker will trip at 15 amps. The 15 amp main breaker only protects components 'downstream' of it, it does not protect your input cable. For example, if you had a short...

I had the drippy cave, dampness under the mattress syndrome and solved it by adding Vetus round portholes on the port and starboard wall of the V-berth and elevating the mattress by a adding 1/2" x 3/4" cedar slats every 4" under the mattress to allow some airflow. I open the portholes and...

Those are good specs. I might go for it at 100 miles on a charge. And you are right, it is coming.

The pricing is interesting, the motor is $6000, charger $2000, and a single battery pack $8500. The battery pack holds 8.8 kWh so if WOT of 1500 prop RPM is the full 25kW then a single battery pack would fully discharge in 21 minutes. So a practical boat would need multiple battery packs and...