Showing posts with label rudder. Show all posts
Showing posts with label rudder. Show all posts

Monday, March 21, 2016

Wood Boat Plans And Kits | Water tanks installation

Wood Boat Plans And Kits



I have eight water tanks for my potable water supply located under the forward sole of my boat. The first tank I built I measured for cubic footage, then filled it with water, and by using a shut off valve and a five gallon bucket I was able to measure the amount of water in the tank. My method of measuring cubic footage and measuring with the five gallon bucket gave me about the same volume of water within two gallons, so Ill stick with measuring for cubic footage vs filling each tank to get volume. I have 325 + gallons worth of water tanks.

After the boat is insulated and Im assembling components of supply, vent, and filling of the tanks, Ill post more regarding the system as a whole.

Im mounting the water tanks using a flange welded to the tank ends and a corresponding bracket welded to the hull of the boat. Where the bracket is deeper in the hull ( by the center line of the boat), I used studs welded to the hull bracket that the tank flange will drop over. On the less deep end of the tank ( outboard ends), I used nuts welded to the hull brackets that the tank flange will bolt to. I used 30 mill pvc pond liner I had laying around the shop to act as a gasket to go between each tank flange and hull bracket.

I had installed the tanks prior to final painting to make sure all the brackets would work and also that the tanks would finish out below the sole framing. I also needed to verify that the valves I was using on the supply end of the tanks would clear all the steel framing. I ended up having to adjust the access holes in the frames for the tank fill lines ( I guess I screwed up on the cut twice measure once thing). 4 3/8" clearance between the front of the tank and the center longitudinal frame of the boat is barely enough ( it fit) room to get a close nipple, valve, close nipple then a "T" for the tank supply. I dont think the Governator would be able to get his arm down in that space to operate this gate valve, but Im able to so Im happy with the final fit. Because I had installed the tanks prior to painting the tank install went fairly smooth. My 13 year old son helped me as the tanks are to large for one person to handle. The only real issue we had was that the amount of paint on the hull brackets caused me to use a tap or a die to clean up the threads on the respective hull bracket. The tanks are a tight fit between the frames so we used as much care as possible lowering each tank into its "bay" so we would not damage the paint. It would take a hard hit to get through all the coats of paint in the bilge area, but I still was very carefull.

I held off installing the tanks as long as possible to try to keep the trash generated from bolting the firing lumber to the frames from getting under the tanks.

Conall

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Friday, March 18, 2016

Boat Plans Bruce Roberts | Star 45 Rudder Construction using laser cut laminations

Boat Plans Bruce Roberts







Star45 : Message: Re: [Star45] naca0009 rudder: "Re: [Star45] Photos of naca0009 rudder

I am happy with how they turned out. I sent the production files to Stevens Monday, so you should be able to order a rudder if you need one. He doesnt have it posted yet, but if you call him he can cut them for you.
I built mine by clamping all the pcs together with the alignment pins in place (1/8 sq stock left over from stringers). Then CAd it together with thin CA. I used my random orbital sander with 150 grit to shape it. Took about 15 min or so. With the different layers you can see if you are removing material evenly. Once sanded I sprayed the rudder with 3M 77, covered with 3 oz glass, one PC folding it over the leading edge so there is no seam on the leading edge. I then added resin and vac bagged in my handy food saver. The next day I pulled off the breather and peel ply, sanded smooth and varnished.

The glass is probably not needed since the core is made out of ply. I used the glass to ensure it is not coming apart and only adds another 10 min or so to do. With the vac bagging it is very smooth and uniform with only a little sanding required to remove the texture of the peel ply. I did buy a yard of breather and peel ply, but waxed paper with holes in it and paper towels can be substituted."

Drawings are available from the Yahoo Star45 group "files"

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Thursday, March 10, 2016

Boat Plans Nz | Sailing Model AMYA Star45 Class Rudder

Boat Plans Nz


AMYA Star 45 Class Rules, 2006, Rudder

6.1 Rudders may be constructed of wood, fiberglass, plastic, plastic laminates or metal. The exact shape is not specified, but they may not exceed 4 1/2 inches at the hull (fore and aft) 3 inches at the bottom, (fore and aft); and may not project more than 7 inches below the hull when measured at the post..



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Thursday, March 3, 2016

Boat Designs And Plans | Rudder and Steering

Boat Designs And Plans




The rudder on my trawler is a rather large device. The approximate dimensions are 2.5 wide by almost 5 tall. Having installed the rudder a few times Im going to guess its weight at 200+ lbs. The rudder looks more like a wing and is constructed in such a way as to have two skins wrapped around the wing shaped frames. It is very sleek looking and more reminds me of a sailboat rudder vs a rudder you would see on a work boat. Compared to the rudders I see on house boats around my home port, this rudder has a tremendous amount of square footage to aid the steering of the boat. By looking at the rudder alone, I would guess this boat will be very responsive to the steering wheel. Becuase of the way the rudder is fabricated it is impossible to paint the inside to protect the steel. Because of this type of rudder construction I air tested the rudder to 10 psi to insure that no oxygen gets inside of the rudder and speeds up rust corrosion.

The rudder is connected to the boat via a large skeg or shoe that is an integral part of the keel. The rudder has 2" stainless stock welded to itself that is flanged on both the top and bottom of the stock. The bottom flange bolts to another flanged piece of 2" stock that sits in a bearing in the skeg. The top flange bolts to piece of 2" flanged stock that passes through a bearing that goes up into the lazzarette of the boat ( rear room) and connects to the steering gear. The flanges for the rudder system I fabricated out of 3/4" stainless stock and bored them to accept 5/8 bolts to hold them together. Ill have to design some sort of locking ring to retain the nuts or use a castle type nut with a key to hold the nuts fast. The bearings for the rudder in the skeg and where the rudder stock enters the boat @ the lower end of the rudder log ( rudder tube) are made from a material called Vesconite. Vesconite is designed just for this application and is claimed to be top of the line material for what Im trying to do with it. I will not have any galvanic worries with this type of rudder bearings.The rudder tube terminates inside of the boat about 8" above the water line. I added another bearing at this point of termination for a total of three rudder bearings. With the rudder installed Im able to move it with just a little pressure from my finger tips. Im totally happy with the bearings and the rudder alignment. Because of the mix of a stainless steel rudder shaft and mild steel boat I will add a zinc or magnesium annode to the rudder to slow down any galvanic corrosion.

The actuall steering system on the trawler will be what most would consider a power steering system. My main engine has a port on it to accept a pump that will power the steering helms that in turn will power the hydraulic rams connected to the rudder shaft. I will have two helms on my boat; one helm in the wheel house, and another helm on the roof as a fly bridge. In case of a catastrophic failure of the steering system, I have an emergency tiller device in place to steer with ( see my earlier post " emergency tiller"). The hydraulic rams are more a heavy duty set up I purchased from Hydro Slave Co. The steering gear consists of a heavy cast bronze quadrant, two hydraulic rams, and an integral arm to limit travel of the rams. If you look at the first picture posted you will notice my attempt at rudder stops welded to the hull. I know they look a bit odd, but at least I made some attempt at aero dynamics and they also wont increase any corrosion issues. The quadrant connects to the rudder shaft via a heavy clamp and a 1/2" stainless key way and key. I went with this type of dual ram set up becuase it causes zero side load on the rudder shaft. I am totally pleased with this piece of equipment, and while it was pricey, I feel it was money well spent. Ill be adding to this blog once the steering system is fully connected and operational with the helm pumps in place along with the hydraulic lines.

Conall

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Wednesday, March 2, 2016

Yacht Boat Plans | Sailing Model AMYA Star45 Class building rudder

Yacht Boat Plans


Here are some photos showing one way to build a rudder quickly and easily. The quick overview is cut out the shape in a thin material, tape the sides together, insert the rudder shaft, fill the inside of the rudder with epoxy. This takes about 10 min or so to do. Followed by installation in your boat.

John Fisher

Lay out the rudder shape on a sheet of 1/64 ply. On other class boats John used a single layer of a 6 oz carbon fiber layup, so you could also lay up some fiberglass for use on the star. To do a glass layup, just take a sheet of 6 oz or heavier fiberglass, a sheet of lexan or plexiglass, and some resin. The first step is to spread resin on the plexiglass, then apply the fiberglass and then make sure it is all wetted out. Once cure flex the plexiglass and the layup will pop off.

Shows the two sides cut out of plywood, these could be fiberglass instead. Straight sided shapes like shown and the star plans are easier to make.

Tape the two sides together with masking tape. With curved shapes He taped them together then insert the shaft and resin. If you use straight sides on the rudder you can tape one side and then open it up like a book, apply resin, then close and tape shut. The open book method uses less resin but only works with sq or straight sided shapes.

Note the bend John put in the shaft to prevent it from turning inside the rudder.

Shows the top open to pour in resin. John uses a syringe to pour in resin once the shaft is in place. You can add micro balloons to the resin if concerned about weight.



Installing Rudder in Star 45

rudder brace

rudder tube


tiller

rudder link

John Fisher photographer



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Monday, February 29, 2016

Boat Designs And Plans | S45 Construction templates for laminating rudder

Boat Designs And Plans





Rudder templates for a Star45 Class sailing model.The grid shown is set for 1/4 inch squares. So if you print the templates you can check the size by making sure the grid yields a 1/4 inch square.

This set of templates are based on drawing from John Fisher. John may have new and updated drawings available. Check with http://groups.yahoo.com/search?query=star45 membership required.

I want to thank J. Herrmann, www.graphicLanguageOnline.com, for his assistance in converting pdfs to jpg drawing, adding color to the templates and adding the grid to the final images.

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