Rc Jet Boat Hull Plans Zip Code,Bass Boat Console Input,Boat Sailing Lessons Zone,Where Are Boats Built - PDF Review
20.02.2021, admin
This is a great project for anyone with a little time to spend. The jetdrive is made from a 20mm stock diameter of aluminium because its light, corrosion resistant and easy to machine.
To start with, the 20mm aluminium rod is cut to a 40mm length, this will be the main jet housing. It is then setup in the metal lathe and a 16mm hole is drilled into one side of it, 10mm deep, and then a 2mm hole is drilled all the way through for the prop. The prop. The impellor i used was bought from a hobby shop and was larger than 16mm, this is so that i can carefully trim it to fit the inside of the jet housing.
The requirements for a waterjet impellor normally include no gaps between the blades, a fine pitch and very close tolerences between the tips of the blades and the inside of the jethousing. The impellor has a 1. The stator housing, which can be seen in the exploded view in the previous step, can be made from either aluminium or PVC plastic, I used plastic as this was better for glueing the stator vane onto.
The vane was cut from an aluminium drinking can and trimmed to size before being glued into place with epoxy resin. It is used to speed up the water coming from the back of the boat, like when you put your finger over the end of a garden hose. The rod is first cut to approximately 20mm length and is then placed in the lathe and an 8mm hole is drill Foam Pontoon Boat Plans Zip Code all the way through.
To the nozzle, a steering nozzle is also added, this is made from a 12mm round piece of plastic pipe, about 8mm long. The steering nozzle also has a servo horn glued to the top of it to which a linkage will be attached later. To achieve the 45degree hole in the bottom of the jet housing, which allows water to enter the jet from beneath the boat, it is best to make a wooden cradle as shown in the above diagram.
The jet housing is then set in the cradle and a drill press used to make the hole. Now that the jet housing is finished, it's plastic seat can be made. I used a piece of acrylic plastic bent into an L shape with a large oval hole in one side and 3 small holes in the other.
A good technique for water sealing the jetdrive is to coat the prop. The hull is shrink formed with acrylic plastic. The first thing to do, therefore, is make the wooden molds, as you can see in the pictures mine were cut and carved from a soft wood. The design of the hull is up to your imagination however, the bottom of the boat molds must have a flat area to incorperate the jet drive and be a planing hull not a rowing hull. The top piece can be a simple flat cover or you can make a windshield as this looks more realistic.
Once the the shrink formed plastic hull has been made it can be cleaned up and, measurements can be taken to start cutting holes for the jetdrive.
I also added some small trays, made from offcuts of the hull material, to attach the electronic components to. The jet drive is now ready to be assembled. First the nozzle is inserted into the stator housing, which is in turn attached to the mating surface of the main housing with epoxy resin. The motor, which on this particular boat is a kv brushless motor, is simply hotglued onto mounting plate of the jet housing and a short spring from a brocken pen is slotted over both the motor shaft and the prop.
If the holes in the boat hull line up it can simply be sat in place and silicone used to seal all edges, inside the boat, round the nozzle at the back of the boat and around the water inlet on the bottom. As seen in the previous step, the servo can now also be mounted onto its tray. A small hole is drilled into the transom of the boat to take a steering linkage made from a paperclip which connects the servo to the steering nozzle, this linkage also has a balloon neck attached to it, this is to stop water from entering through the hole while still allowing the linkage to move freely.
I used a 2. All parts are mounted on trays as protection against water if i happened to leak in. Another method which can be seen in the picture of protecting the motor is to add tissue paper around the jet drive, this Speed Boat Design Plans Zip Code is so that if water makes its way through the prop. There are two methods of sealing the top piece on the boat hull. Then a bead of silicone is run all the wa around the edge of the lid and on the battery and esc wires to permenantly seal everything inside.
The battery can still be charged and the boat turned on and off easily. The other way is to run a silicone bead around the edge of the lid as before and when its fully cured, to carefully slice the silicone with a good craft knife so as to make the lid removeable but still have a reasonably good seal when its put back on.
No holes in the lid are neccesary with this option, all wires can be kept inside. I also decided to add an aerial tube for better transmission, it is simply glued into a small hole in the windshield and the aerial from the reciever is slid inside.
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