Bottom left is an enlarged version of the top right and the top right and bottom left is in the tip left.
There has been some changes to this ruff draft. The computer system was getting interference from magnetic poles from the solenoid valve.
Pressure Hull
Is a 5 inch (12.7 cm) O.D. 14.2 cm I.D. 12.7 cm wall thickness 0.7 cm
Length 121 cm
density 40 g/cm
mass of pipe is 4.858 kg
Volume 15.3 Letters (4.05 gal)
Water displacement in 15.4 kg (34.0 lbs)* last time I checked I was at 11.8kg (26 lbs)
*the difference in density of the pvc pipe was not taken in to account.
Ballast tank
This was on the pipe I am using as my ballast tank.
12" DR-18 CIS PVC 1120 235 PSI/T-600 AWWA C-900-07 [NSF-61]-G VACBO4A 109:39 (150 PSI)
| C900 DR 18 Pressure Class 235 PSI (FM Approved For 150 PSI) | ||||
| Size | Wall Thickness | Working P.S.I. | ||
|---|---|---|---|---|
| 12" | 13.20 | 11.65 | 0.733 | 235 |
This pipe was found in a junk pile with slit sun damage. If it so happens I get a chance to get a 12" schedule 40 I will.
The mass of this pipe is 33 kg for the 122 cm. 1 cm of pipe is 3.682 kg that is a ring of pipe that is 1 cm long.
each cm of pipe displaces 220.7 cm^3
buoyancy, 1 cm of pipe is 0.6250 kg
Air in out and temperature
This will be a sealed hole thought the top of the pressure hull. there will be used to channel the air to the ballast tank to become more buoyant, and vent air from the ballast tank through the solenoid valve to release the air into the water.
There will be a waterproof data-link to receive information from sensors primarily a temperature sensor.
Rubber Cap
I performed an experiment. I released pressure to the inside of my pressure Hull with temporary rubber and caps. These temporary end caps can only hold a few psi. 1 psi it moves outward, 4 psi its bulges out, 5 psi the end cap fails.
Later I will program a safety feature. If water is sensed inside the pressure Hull autonomously the sub will increase the pressure halts pressure to 4 psi above the pressure of the water. This will replace water coming in with bubbles going out. There will be more testing to determine if this will work underwater.
1.27 cm cap (Click), cap for pressure hull.
This is a temporary cap. It is fast and easy, however it wont hold mach pressure.
weight is 0.430 kg
30.5 cm cap (Click), cap for ballast tank
mass 1.650 kg
| Part No. | ID | Min | Max | Pipe Size |
|---|---|---|---|---|
| QC-112 | 12.49 | 11.41 | 13.33 | 12" PL - 12" CI - 12" ST - 12" Ductile - 12" AC - 10" West Coast Clay - 10" Eastern Standard Clay - 10"Concrete |
Long Screws rod
Steelworks 0.164-in x 36-in Standard (SAE) Threaded Rod
Nuts
The Hillman Group 4-Count #8 Zinc-Plated Standard (SAE) Nylon Insert Lock Nuts.
Horizontal support rod to rod To hold equipment and sensors in place
This is the most basic version which you can alter to fit your needs Here.
How does it work? these could be fashioned out of wood, I'm using a 3-D printer ABS and PC. A rod goes through both ends and held in place by eight and. Instead of a pen I'm using 44mm Small Size Alligator Test Lead Clips
Air Tank (Click)
This tank will work for these smaller tests although I will later be getting a larger tank for the final sub.
Pressure Gauges (Click)
This gauge is 1/3 of the price as another pressure gauge. The site claims it is a female 1/4 inch, it's not I received a 1/4 inch mail. In order to keep the price lower I went with his own event thew it isn't my standard 1/8 inch, I just use a converter. This is analog I am having some problems because this gauge ranges from 0-5000 psi, 344.7 Bar and the micro control I am using Is a Arduino uno and The analog pin the uses 0-1024 bit, The censer Is reading in 0.7 Bar increments. By converting to digital I should be able to fix this problem.
Pressure regulator (Click)
This will Regulate from 0-13.79 bar. There aren't any regulatorsthat can be remotely regulator in an affordable price range. I am going to make a stepper motor to regulate the pressure it uses an CRV 3/16 inch allen wrench to change pressure
Servo
Instead of using a stepper motor a Servo SM-S4315R is being used. the SM-S4315R has high enough torque. This is the 123D file for the mount. And adapters needed to go from the servo to the 3/16 inch hex. After trial and error this is his get as I got (Here). It was a bit of a tight fit.
A very basic code is (Here) to familiarize yourself with how the servo works. Note 0 to 89 moves counterclockwise smaller the number faster the rotation. 91 through 180 rotates clockwise larger the number faster moves. 90 is its stopped position; it has no movement.
Standers 1/8 inch brass pipes
For the most part I am using 1/8 inch NPT brass pipe, To save money I will convert to some others such as 1/4 inch for my digital pressure gauge.
Stepper Motor
I'm using an old stepper motor from an old printer, The TYPE17PM-K018-G22ST
this is the closest match I could find (Click). this may not be the same motor because the datasheet claims each step 1.8° and the one I have is not that sensitive.
Solenoids Valve (Click)
product number ASCO 8262H019
This Solenoid has a max pressure of 51.7 Bar with air. It can only hold this pressure back own way, This can handle about 6.5 Bar reverse pressure. This is also converted from 1/4 pipe size to 1/4.
Solid-state relay: originally I was using standard relays, in order to reduce noise I switched to solid-state relays. There are four channels, currently I'm only using two. Versus schematic are used for the (solid-state relays).
Computer System
The arduino uno and UDOO (make your own mount click) will be my computer system. There will also be other sensors in this system. There will be a gyro, temperature, humidity, pressure sensor. The most water sensitive chips will be in a case here.
Batteries
I will be running 24v to I will be using two 12v batteries that are small enough to fit in a 5 inch diameter pressure hull
Weight
The bottom of the presser hull will have weight in it to better keep the top of the basilisk tank facing up.
I made a chang, the air tank is now under the solenoids.
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