A twin keel, 1979 COBRA 1050, 10.4m sail boat with electric propulsion
We found our sail boat project. The solar electric propulsion would fit like a glove. She had all the potential to be a long distance live aboard. A COBRA 1050 with twin keel was a better find than we expected.
Our new/used COBRA 1050, twin Keel. A Masthead Sloop rigged, ocean cruising, sail boat with solar electric propulsion. Approximate dimensions are 10.4m length x 3.7m beam with a maximum draft of 1.6m.
Designed by David Feltham Yacht Designs, as an 8 berth but to be honest is perfect for 2 on a long cruise. Easy to sail with a maximum water speed of approximately 7kts, with a good 20kts following wind.
I fitted an axillary electric engine (solar electric propulsion) which came as a kit and is manufactured by Lynch Electric Motors in the UK. The model of electric drive fitted to OCEAN STRIDER is an 8kw Marlin Drive, which runs on 48v DC electric current, fed by 8 x 200amp AGM batteries. Perfect for this size of boat, approximately equivalent to a 24hp diesel engine.
We were going to need a remote, sustainable, eco friendly electricity supply. I had a stainless steel frame made to my design and fitted it to the stern. We added a spray hood and full canopy, using the frame for support. I then added 4 x 100w solar panels and a Rutland 1200, 48v/483w wind generator.
The electric drive also charges the battery bank when sailing at around 5kts through the water or more.
As an added precaution I fitted a 7kw LPG HYUNDAI generator in the cockpit.
Connected to the 48v, solar electric propulsion battery bank is a 48v x 3000w pure sine inverter/charger with solar controller, a fantastic piece of equipment. Which feeds 240v AC into the boat from the batteries, charges the engine battery bank and controls the solar charging
At the present time, she has a set of leisure batteries (12v DC), which I intend to remove when I work out a problem with the DC to DC converter (48v ->12v DC). I can then use the engine battery bank to power the leisure side of the boat.