Garry Posted May 5, 2006 Posted May 5, 2006 This is the layout that I have proposed to Graham for my P28. The V-berth and seats will be at the same level with minimum bulkhead between which will make the interior feel spacious. The back of the Settee/Sea berth will swing up for more room when sleeping and access to some storage. There will be no sump or bilge. With no prop shaft there should be no water coming aboard. If there is a leak, it will be immediately evident since the cabin sole will be the lowest point in the boat. I like having the head handy to the companionway. The head/shower compartment will be tight but should allow for a sit-down shower and a place to hang wet foul-weather gear. A non-slip rug at the foot of the companionway will absorb drips from a wet crewmember and keep the rest of the cabin dry. Four or eight batteries will be heavy but actually weigh less than an inboard diesel and fuel tank. They will provide one to four hours run time depending on the speed and conditions. Longer runs will be by sail or by trailer. Quote
Garry Posted May 6, 2006 Author Posted May 6, 2006 Hi Ray, I doubt there will be much usable space between the countertop and sidedeck. It would be nice to have a little space, maybe for a couple of drawers. I'll have to wait for Graham to draw up the interior which will be in the next few weeks so I can calculate weights. I told him no hurry since it will be a while before construction. (But I am anxious to see the drawings!) Yes, I am planning electric drive. I wanted to do this on the boat I completd back in '85 but chickened out. I haven't worked out all the details yet. Could be anywhere from 4 to 8 batteries for 48 volts, 6 if I go 36 volt. I'm hoping to get by with solar panels on the cabin top and bimini. Right now I like this motor: http://www.outboardelectric.org/index.html But I would modify it to work in a motor well like this: Quote
Greg Luckett Posted May 7, 2006 Posted May 7, 2006 Gary, I cannot see the detail very well in the layout, and only a little better in the electric engine one. Could you post a link to the pics or perhaps email the originals to me? Thanks Quote
Frank Hagan Posted May 7, 2006 Posted May 7, 2006 Greg, you should be able to click (or double click) the thumbnails to open them in a new window. Once you do that, hold your mouse cursor over the lower right to see if Windows has re-sized them; if a square box appears with four arrows pointing toward the corners, click it and the picture will expand full size. Or, right click the pics and select "Open in New Window" from the menu and then expand that window to full screen if necessary. Garry, I'm intrigued by the plans for the electric drive. I suppose the weight of the batteries is offset by a reduction in the weight of the ballast. Does Outboard Electric have a regenerative charging option for the batteries by dropping the prop into the water? Quote
Greg Luckett Posted May 7, 2006 Posted May 7, 2006 Duh! I should have know this one. Darn brain cells are dying faster than I can retrain the replacements, I guess. :oops: Thanks Frank Quote
Greg Luckett Posted May 7, 2006 Posted May 7, 2006 Looks like 300 LBs or so of batteries which would be offset by the weight of the fuel for a gasoline engine that is not there. What an intriguing idea. Just the loss of noise alone would be wonderful. I wonder if a small, gas driven generator should be on board during long cruising for recharging just in case? Those electric motors are not cheap either, but then the cost is offset by the savings in fuel cost. I am starting to really like this idea. Quote
Greg Luckett Posted May 7, 2006 Posted May 7, 2006 I like your layout, Gary. Three things I like close to the helm: the head, the galley, and the nav station. It does seem to have concentrated a lot of weight in the aft end of the boat: batteries, engine, helmsman, other human ballast, water, and storage. Perhaps the water would be better under the forepeak area? I would love to see a layout done this well for the PS26. I have not tried to do one yet myself, but it looks like fun. Quote
john bowen Posted May 7, 2006 Posted May 7, 2006 I SOOO APPRECIATE the mnessing about forums! There' date=' got it out of my system. [/quote'] Mnessing? Could you elaborate a little more with the use of this term? Thankyou. (Just being curious.) Quote
john bowen Posted May 7, 2006 Posted May 7, 2006 Thankyou Ray, no razz intended. These forums are a great tool. Not only for the learning but, for a way to communicate (enteract). The P28 is a vary intriguing design. One I'll be watching close"ly, for sure. I'd like to do THE LOOP in five, six years time. The P28 is looking to be a good design candidate, for doing such. Quote
Noklin Posted May 7, 2006 Posted May 7, 2006 Gary, your plans for the electric motor in a motor well reminds me of the Emergency Propulsion Motor (EPM) used in the nuclear submarine I serviced on back in the 70s. It was an electric motor in a motor well that could be hydraulically lowered and trained 360 degrees. If it worked for the Navy, why not your boat. Quote
Garry Posted May 7, 2006 Author Posted May 7, 2006 I also am a little concerned about the weight aft. Although the aft sections are a LOT wider than the bow sections so I imagine the stern is less sensitive to wieght under the cockpit. One negative factor though is the loss of flotation from the motor well. I plan to work on the motor well design to minimize it size and resultant loss of flotation. The lazarette area would be reserved for the propane bottle on one side and lightweight stuff (fenders, life jackets, etc) on the other. I haven;t decided if there will be four, six, or eight batteries yet. Will need to study up on charging systems etc. The bow will probably have an anchor on the anchor platform with chain and rope in the anchor locker. There will be normal type storage under the V-berth. The bow sections are fairly narrow and I definitely don't want to weigh the bow down and have it stuffing into waves instead of rising over them. I'll probably keep a second and maybe third anchor under the cockpit seat lockers. Part of my job is to calculate weights for everything. Graham will start me out with a spreadsheet with columns for weights and locations (x, ,y , and z) to calculate the center of gravity. That will help make some decisions on placement of the weights. Quote
Guest Oyster Posted May 7, 2006 Posted May 7, 2006 Well, for all the razzing I gave Cap Jake about how he insisted on spelling THE as "the" I can't complain any when it comes back on me. And let me tell you how truely bad it was here for many members with a short memory span. :wink: When all of us typed "The" for the longest kind of time, it still came out "TEh" for the longest kind of time. :wink: Speaking of Jake, he seems a bit quiet lately. edited, to sat taht after scanning the posting, it looks like someone[taht fancy gremlin] has fixed that T E H speeling. Quote
Garry Posted May 7, 2006 Author Posted May 7, 2006 Oyster, I'm not clear on your post unless there is an automatic speeling corrector that changes "teh" to "the." :wink: Quote
Garry Posted May 7, 2006 Author Posted May 7, 2006 Ah Ha!! Yes there is a speeling corrector. :wink: It changed "t-e-h" in my previous post to "the." How wunnerful!! Quote
Guest Oyster Posted May 7, 2006 Posted May 7, 2006 Yep, just found out, after three years, that it seems a troll is under the posting screen correcting a few simple words for us dummies of speeling. And if you have followed my latest response to Adla, I have two faults, which includes the speeling disorder, that lives with me constantly. Frank is just too much, taking care of us old goats in cyberspace. 8) Quote
Ken_Potts Posted May 7, 2006 Posted May 7, 2006 It seems that I remember Frank playing an April Fool's joke where there were some word substitutions and some spelling changes across the entire website - The end result of which was the automatic "t-e-h" corrector... Sorry - Didn't mean to hijack t-e-h thread... Quote
Garry Posted May 8, 2006 Author Posted May 8, 2006 Doh! Good catch Greg. It would go just forward of the water tank. The space shown for the water tank is quite large anyway. I would probably try for 80 gallons water and 30 gallons waste. I would fill the water tank only when going for a long cruise so I'm not dragging that much weight around. I would want to have the cockpit sole removable to get good access to the tanks for cleaning and inspection. Since the hull below the tanks would normally be inaccessible, I would build that space watertight except for a small drain forward. If that section is ever holed, the drain hole would tell me but I wouldn't be sinking before I could get it repaired. Same thing for the port and starboard cockpit lockers, settees, and under the V-berth. Stoppers could plug the drain holes if ever necessary to confine leaks to one area until repairs can be made. Quote
Greg Luckett Posted May 9, 2006 Posted May 9, 2006 Gary, I wonder if smaller water tanks spaced about the boat would be better for trimming and would add an element of safety in that if something happened to one tank you would not be without water. PS This is fun thinking of how to layout a custom interior! Quote
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