Masafi Water-Air C-Engine Rocket

Playing with air pressure rockets is really awesome, I used to take on of these Masafi bottles, but water hose in (tight fit), pump water -> after sometime, the air pressure inside will be high enough that you can't hold it anymore, then point up and release and BOOOOM

That what happen with one bottle, so what about a whole rocket??

so, I set to make a rocket, which currently is a big fail because I did not have a proper air sealing material,,,

concept of one bottle, first pressurize then release (click to enlarg)

When I connected two, the leak happened as shown

The concept of the Multi-Masafi Water-Air Rocket (cross section showing 2 of the six C-Engine Cylinder :P) and yea, C for Circular, and "strobe" should be "straw"

The pictures above does not show the actual bottle size, below it does (okay, to some extent, excuse my hand skills on MS Paint)

It also shows the expected aerodynamic behavior (the rocket is going up)

  

well, if it failed/drifted etc am gonna add a cone/rocket case to remove the effect of the straws / bottle shape

I collected bottles

drilled the holes

assembled with duct tape and glue gun:

The problem is that glue gun does not withstand air pressure and fails, I'll continue this when I have what I need, till that time, this rocket which looks like one of Yuri's buildings (Red Alert) will stay on the wall

Garage Door

Recently, we moved to another home, unfortunately (or fortunately) the garage door does not work, we open it manually currently, we requested the house owner to fix it but they said that they tried many times but failed, so what does this mean for an EE lover?

An awesomeness of course, a new toy to play with, a new game to reverse engineering :)

I tried the manual button, the motor does work but the door does not move, I tried assisting it by giving it a push but no hope, so apparently, the gears are broken/loose etc a mechanical problem in short.

not only that, but also, we do not have the remote controller, so apparently I'll have to hack it to put my own wireless connection, later..

now lets start playing:

The box:

Now I need to remove the bottom to reach the mechanical problem and fix it, I had to use a lot of force to open these two blots on bottom:

notice how the spanner got bended in the image below

What about this dried-sanded grease:

overview of the inside, 

top right is the motor with three wires (I don't have experience with motors, so your help is apperciated here, the motor has three wires two of them are connected the big cylinder you can see on the top left [I guess a cap??!] and there is a third wire)

What is this motor? which type? what are the three wires?

Is it a capacitor really? why it is there?

top left a capacitor (I guess)

below it is the transformer

and on bottom the PCB

Wireless chip on right side of PCB

Connection Header on top of PCB

The circuit 

started labeling some wires

I then used WD-40 and sprayed on the screws to remove the PCB (Along with the transformer which is soldered to the PCB)

Now I need to remove wires, so I took note of all connections and labeled wires

Before that, I decided to test it, found that the motor is actually rotating as well as the output shaft

so, I reconnected it up again, but again it does not work!!!

conclusion: the mechanical assembly is having a problem which I cannot fix

repairing attempt Failed!