Kevin , when talking about serious ocean going , then you have to consider all possibilities , its not always possible to hide from bad weather.
About this time last year , a Czech was getting well in to the last leg of a solo circumnavigation , from NZ to NZ.
He was in the Southern ocean , 800 or so NM south of here , when he was hit by a storm , of a severity that he had never experienced before.
After 3 days , his boat pitch poled , breaking the mast , and clearing the deck , including his life raft.
He had to stay below for another 2 days , before the weather abated enough for him to come up , and survey the damage.
He had a boom left , he made up a little jury rig , and there was a fair amount of diesel in his tank , so , over the next few weeks , he slowly made it to Portland , Australia , motoring , motorsailing.
Tell me how he could have made it back here , by electric power.
The only way I can see is by using a serial , or parallel diesel hybrid , installed in the boat.
There is a lot to dislike about diesel , but the reality is its hard to beat , when the chips are down.
Regards Rob J.
From: Kevin Pemberton <pembertonkevin@gmail.com>
To: electricboats@yahoogroups.com
Sent: Sat, 4 June, 2011 9:30:53 AM
Subject: Re: [Electric Boats] Re: Siandra unplugged
Like it or not, advertising or promoting something like re-gen that has shown makes up little of what is used is a bad idea.
I have charmed in on the topic more than once just to remind people it is a pipe dream. It is disappointing to read that someone that went to the trouble of conversion went back to a complete dino system because someone sold them on such a thing. I hope people on this list will continue to discourage the hope of re-gen every time it is brought up. It has little to do with new tech and more to do with selling something that has failed the test more than one time just to make a buck.
What you can expect from re-gen is:
- Lost WMG that seems to mean little till you are caught in a storm because you failed to make port before the storm.
- finding that recovery didn't even keep the house lit.
- Finding that people that tried to discourage re-gen were right, and no matter, you are disappointed with your results.
Kevin Pemberton
On 06/03/2011 09:53 AM, acsarfkram wrote:
Hey Mike,
I couldn't agree more, for me it would be depressing to go back to diesel or gasoline. Regen is a weak point(so far) and it seems a prop in an aperture is even more of a challenge. I can't shake the idea of a hydro-generator for regen on an electric auxiliary.
I guess they must of gotten one of the older Sevcons that restricts forward/reverse shifting if the shaft is moving. They could have had the controller re-programed or have done what I did with the shaft brake. The brake would have also taken care of the freewheeling prop issue.
Mark
Santa Cruz
-- AspireOne Netbook running Ubuntu 11.04 Safe, Secure, Easy to use, Free Open Source Linux OS. Leaving Virus worries to the Windows Users!
__._,_.___
.
__,_._,___
No comments:
Post a Comment