Category «Driveline»

Latest Thoughts on Diesel/Electric Propulsion

Some updated thoughts on diesel/electric propulsion…   According to the internet, more sailboaters are switching to electric propulsion. You will find “ground up” DIY systems from off-the-shelf components (thanks to the growing DIY electric vehicle movement) to full “turnkey” installation products.   Now, I am not about to debate electric vs diesel propulsion. But since …

Exhausting Little Stuff

As usually happens this time of year, lots of work on little projects with nothing really to report on. I am still waiting for some parts to fully fit the exhaust system, but here is an update. This is the Vetus waterlift muffler strapped onto a small riser platform made of Coosa board. The riser …

Shaft Coupler Puller

For a while now, a temporary prop shaft, with coupler has been attached to the Aqua-Drive thrust bearing. Everything has been set and aligned. The mechanics under this part of the floor need to be finalized before the rest of the aft cabin framing can happen. This includes the engine waterlift muffler, plumbing and the …

Shaft Log is In!

Since I broke open a tube of 3M 5200 sealant for the aft deck cleats, I thought I would try and use the rest of the tube for something else before it went bad (in a couple months). With weather cooperating this week, I chose to install the shaft log. I had, some time ago, …

Diesel/Electric by Emotion Hybrids

I came across a company called Emotion Hybrids out of Florida that is providing marine diesel/electric solutions. Apparently started by an ex-Solomon Technologies manager. It appears they are providing the D/E propulsion systems for some of the Lagoon catamarans. Also, it appears the well known marine technology author and journalist, Nigel Calder, has chosen Emotion …

Aquadrive/Final Drive is IN!

…with the mounts compressed to recommended tightness. I had to remove a couple shims and flatten the back of the stern tube a bit (with a file) to get things precisely aligned. But the shaft now free-spins on it’s cutless bearing, indicating minimal resistance, a good indicator of proper alignment. The mounting plate was painted …

Dry-fitting the Aquadrive

Completed the dry-fit of the Aquadrive thrust bearing. Why do this now? Well, access. Everything is open in the stern. As things get built up back there access will be more difficult. Reminder that the Aquadrive is a device which separates the thrust of the propeller from the engine. A typical straight shaft installation pushes …

Aligning and Centering the Final Drive

The design of the final driveline calls for a 4 degree downangle for the propshaft. This is closer to “horizontal” than would be if the stern tube was mounted flush against hull surface as it came from the factory (it would be about 8-10 degrees is my guess). It is desireable to have the shaft …

Designing the Driveline

Been talking with the Drivelines NW people about Aquadrives. The advantages of such a system are spelled out on their website. The primary advantage we see is the flexibility of the engine install and repower. Any future repower should be much easer without having to deal with a long propshaft (not that we are PLANNING …