T-Pain Is On A Boat: Re: [Electric Boats] Hull extension for jon boat and Torqeedo

Friday, July 22, 2011

Re: [Electric Boats] Hull extension for jon boat and Torqeedo

Dan,

That looks like an 801. Are you using 24 volt battery setup. If so you may be only getting 560 watts rather than the rated 700. You should be able to achieve the higher power and spiin the prop at higher rpm's by adding a 6 volt battery. That will get you up to the 30 volts that the lipo battery puts out. I checked with Torqeedo several years ago about going to 36 volts and they said no but that 30 was okay. Put the battery in place of the grandkids! Go faster with less fun!

Ned

On Jul 22, 2011, at 10:50 AM, danbollinger wrote:

At full speed my jon boat, intended for planing, wastes a lot of energy making stern waves since the Torqeedo doesn't have enough power to plane the boat. So, I built a hull extension to turn it into a displacement boat. It adds about 3' to the waterline length and improves trim since it provides some much needed buoyancy aft.

Sadly, there was no improvement at full speed: 5.7 mph before and after.

Things improved a little bit at 3/4 speed: 4.5 mph before, 4.7 mph after.

The greatest improvement was at 1/2 speed: 3.6 mph before, 4.3 mph after. At this speed the stern wake is very smooth. This is probably the actual hull speed and the best speed for the greates range.

I suspect greater performance across the board when I have two grandkids on the bow seat!

See the photos in Dan's folder at http://groups.yahoo.com/group/electricboats/photos/album/1558352835/pic/list