Engine repair for a beginner.

[Shurik-1960]

1. Disassembling the engine. 2. To remove the stator coils, I put them in a dry frying pan and heat them for 10-15 minutes, then disconnect the parts. You can not do this with pliers - you will damage the enamel protection!!! 3. I remove the wire from each phase and count the number of turns. 4. I paint over the chips with 2 component epoxy. 5. 1 meter of wire and I start to wind: I need -17 turns, but in fact - 14 turns per tooth. 6. I wind according to the color scheme: 14 turns clockwise and 14 turns counterclockwise, a transition of 180 degrees and 14 turns against the clock + 14 turns clockwise. Hurrah- 1 phase is wound up.





Dear modelers, please do not ask questions until I finish putting up the photo and the story definitively.

 

[Shurik-1960]

The winding was a star.The winding time of 3 phases is 2 hours. Turn by turn .No rush. In the evening I will do the assembly and check with the voltage regulator. Attention: you will NEVER be able to get 100% of the characteristics of a burnt-out engine. It will be an engine with new characteristics.

 

[Shurik-1960]

Old winding : 2 wires of 0.16mm diameter, 17 turns per tooth. New winding : 0.4mm diameter wire , 14 turns per tooth.

 

[Piotrsko]

Torque monster if you can feed it. Think the epoxy isn't high temp enough which may or not matter.

 

[Shurik-1960]

I forgot the main thing: I put the transitions to the next 2 teeth in a heat shrink (this can be seen in the photo). I have been using Epoxy for engine repairs for 10 years.

 

[Foamforce]

I saw some calculators for determining what size wire to use, based on the number of winds you wanted. I think the calculator helped determine the largest wire you could use to maximize copper. Do you use something like that? If you do, could you explain it please?

 

[skymaster]

1. Disassembling the engine. 2. To remove the stator coils, I put them in a dry frying pan and heat them for 10-15 minutes, then disconnect the parts. You can not do this with pliers - you will damage the enamel protection!!! 3. I remove the wire from each phase and count the number of turns. 4. I paint over the chips with 2 component epoxy. 5. 1 meter of wire and I start to wind: I need -17 turns, but in fact - 14 turns per tooth. 6. I wind according to the color scheme: 14 turns clockwise and 14 turns counterclockwise, a transition of 180 degrees and 14 turns against the clock + 14 turns clockwise. Hurrah- 1 phase is wound up.





Dear modelers, please do not ask questions until I finish putting up the photo and the story definitively.

wow so this is the future of cd's. Lol

 

[Shurik-1960]

Engine test: battery 2200 mA in 3 seconds, propeller 7040, maximum current -12.2 A, thrust - more than 1 kg. Good luck repairing your burnt out engines.I have provided a calculator for calculating the wire section using the link. But I just wrap all motors with a power of up to 400 watts with a 0.4 mm thick wire - this is a high-quality wire that was given to me 40 years ago. I have already written: no one will ever be able to repeat the characteristics of a burnt-out engine. In this photo, I rewound the engine from the CD.



I have not figured out how to fix the shaft, so this engine can be installed as a pusher.

 

[quorneng]

Is it not an electric motor rather than an electric engine? Engines have pistons and cylinders.

Just a point but so far I see no mention of the rewound motor's kV or how to calculate it.
It is rather important parameter for a brushless motor that is to be used to drive an airscrew.

 

[AIRFORGE]

Is it not an electric motor rather than an electric engine? Engines have pistons and cylinders.

Just a point but so far I see no mention of the rewound motor's kV or how to calculate it.
It is rather important parameter for a brushless motor that is to be used to drive an airscrew.

OFF TOPIC.

While some on the forum use the two words interchangeably, the majority understand the difference, and allow the usage.

How you see it depends on your chosen definitions of the words, especially since languages morph.

These are the definitions I used for most of my life, and still prefer:
(From MIT)
An engine is a device that converts energy into mechanical motion or power. Engines use a fuel source, such as gasoline, diesel, or natural gas, to generate power. The most common type of engine is an internal combustion engine (ICE), which uses a combination of air, fuel, and spark to ignite a combustion process inside the engine. This process generates power, which is then transmitted to the wheels of a vehicle or other machinery.
-Internal Combustion Engine
-External Combustion Engine
-Steam Engine
-Gas Turbine Engine
A motor is a device that converts electrical energy into mechanical energy. Motors use electricity to generate power, rather than relying on fuel combustion like engines. The most common type of motor is an electric motor, which uses electromagnetic forces to produce rotational motion.
-Electric Motor (AC/DC)
-Hydraulic Motor
-Pneumatic Motor
-Servo Motor

Again, languages do morph and right or wrong, some see engine/motor as being the same, now.

BACK ON TOPIC.

 

[Mr NCT]

OFF TOPIC.

While some on the forum use the two words interchangeably, the majority understand the difference, and allow the usage.

How you see it depends on your chosen definitions of the words, especially since languages morph.

These are the definitions I used for most of my life., and still prefer:
(From MIT)
An engine is a device that converts energy into mechanical motion or power. Engines use a fuel source, such as gasoline, diesel, or natural gas, to generate power. The most common type of engine is an internal combustion engine (ICE), which uses a combination of air, fuel, and spark to ignite a combustion process inside the engine. This process generates power, which is then transmitted to the wheels of a vehicle or other machinery.
-Internal Combustion Engine
-External Combustion Engine
-Steam Engine
-Gas Turbine Engine
A motor is a device that converts electrical energy into mechanical energy. Motors use electricity to generate power, rather than relying on fuel combustion like engines. The most common type of motor is an electric motor, which uses electromagnetic forces to produce rotational motion.
-Electric Motor (AC/DC)
-Hydraulic Motor
-Pneumatic Motor
-Servo Motor

Again, languages do morph and right or wrong, some see engine/motor as being the same, now.

BACK ON TOPIC.

We interrupt this topic for an important announcement:

“ Why can’t the English teach their children how to speak,
Norwegians learn Norwegian
the Greeks are taught their Greek….”

But wait, Shurik is Russian and doing a mighty fine job of participating and contributing to the forum even with the difference in language!

We now return you to your regular topic, which is already in progress.

 

[Shurik-1960]

This topic is for modelers who will not be afraid to repeat all the described actions and eventually receive a prize - a working device, and everyone decides for himself how to name it correctly. I am 64 and 24 years ago I was in San Francisco, Detroit, Chicago and spoke English fluently.I have a Casio synthesizer. But I'm already bad at playing notes. But I learned how to repair cars, televisions, smartphones, radio control equipment. I just don't have time to learn English.. A businessman and a friend from Japan was to visit me in Russia. 2 brothers (friends of my classmate who lived and worked there for a long time in the USA) often came from California. They found beautiful and intelligent Russian women with whom they returned home. The live communication in English was very excellent.I'm using a dumb Google translator right now.