Hand made 1/5 scale K2 Black Panther MBT in Korea.

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Youngjae Bae
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Re: Hand made 1/5 scale K2 Black Panther MBT in Korea.

Post by Youngjae Bae »

Finally, the bulldozer that was made for a very long time is finally completed. From next week, I will get a servo that is delayed in customs clearance and finish the upgrade of K2.

Youngjae


Vince Cutajar
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Re: Hand made 1/5 scale K2 Black Panther MBT in Korea.

Post by Vince Cutajar »

아주 아주 좋아
Very, very nice

Vince

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Youngjae Bae
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Re: Hand made 1/5 scale K2 Black Panther MBT in Korea.

Post by Youngjae Bae »

Two servos, which will be in charge of vertical operations of the main gun ordered on March 21, came home yesterday, more than 20 days after entering Korea from China.
In the process of reflecting the amendment to receive the correct product through correction due to a large amount of government VAT due to the incorrect application of HS code by an agent in charge of customs clearance, there were two dismissals by the Korean Customs Service, so I paid the incorrectly measured tax and received it, and I'm going to take the process of getting the tax back.

When I tried to work with a dedicated programmer of GX SERVO, which I had bought first to reverse the direction of one of the servos I received yesterday, I found that the servo programmer was defective.
The product was sent without three pins for the servo interface.
I found out that their QC level was terrible, so I doubt that their servos will work well.
I tried soldering three wires to the servo programmer myself and connecting them to the servo, but the computer and USB dongle recognize each other's signal, but the dongle and the servo could not recognize each other.
The dongle couldn't read the parameters of the servo, so it eventually decided to return it through AliExpress, notified the existing buyer of this and ordered a new product at the same time to save time.
I also asked him to thoroughly check the quality before delivery.
First of all, I will install a servo reverse switch in one servo to work with the reverse direction, and I will adjust the length of the push rod to match the centers of the two servos.
Later, when a new programmer comes, I will try to reverse the direction and adjust the center through the programmer.

And while waiting for the new servo, I decided to modify some devices through various trials.

1. I decided to replace the motor that controls the level of the turret with the planetary gear motor from the currently installed worm gear type.
When the horizontal stabilizer was turned on during the test operation and the excessive left and right pivot was intentionally performed, it was found that the current worm gear could not withstand and was crushed.
Therefore, I decided to replace it with an impact-resistant planetary gear type motor that was applied when manufacturing 1/6 scale Chieftain and ordered an additional motor.

2. The test was carried out after replacing the gear ratio to speed up the heavy RC tank of the Big Scale.
I found out that when I excessively adjusted the dependent gear ratio to increase the speed as much as possible, the torque loss of the engine was severe and the engine was too much.
I found out the limitations of the proper gear placement based on the current engine, so I decided to adjust the gear placement to the proper level again.
These operations will be carried out from next week.

Youngjae
Attachments
Extreme speed boosters and sprockets to maximize speed - set to decelerate again
Extreme speed boosters and sprockets to maximize speed - set to decelerate again
Extreme speed-up gear ratio to maximize speed
Extreme speed-up gear ratio to maximize speed
Identified that the gear teeth were also damaged
Identified that the gear teeth were also damaged
Inside the worm gearbox that was damaged during the rapid horizontal stabilization test of the turret
Inside the worm gearbox that was damaged during the rapid horizontal stabilization test of the turret
Inside the worm gearbox that was damaged during the rapid horizontal stabilization test of the turret
Inside the worm gearbox that was damaged during the rapid horizontal stabilization test of the turret
Plan to install 2 planetary gears for horizontal control to be replaced
Plan to install 2 planetary gears for horizontal control to be replaced
12.jpg (72.36 KiB) Viewed 744 times
The worm gear motor currently installed, the horizontal stabilizer ON, and the gear is broken in the sharp left and right pivot turns
The worm gear motor currently installed, the horizontal stabilizer ON, and the gear is broken in the sharp left and right pivot turns
11.jpg (66.3 KiB) Viewed 744 times
Configure the servo to be installed temporarily
Configure the servo to be installed temporarily
Servo signal reverse switch
Servo signal reverse switch
PC program fails to read servo parameters, then decides to return defective products
PC program fails to read servo parameters, then decides to return defective products
Connect PC, Servo programmer and Servo
Connect PC, Servo programmer and Servo
Trying to use three strands by soldering them directly
Trying to use three strands by soldering them directly
There are no three servo connecting pins
There are no three servo connecting pins
Programmers exclusively for GX servos that arrived defective
Programmers exclusively for GX servos that arrived defective
150KG.cm GXservo
150KG.cm GXservo
150KG.cm GXservo
150KG.cm GXservo
2 servos for vertical control of main gun arrived in 21 days
2 servos for vertical control of main gun arrived in 21 days

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Youngjae Bae
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Re: Hand made 1/5 scale K2 Black Panther MBT in Korea.

Post by Youngjae Bae »

The parts I've been waiting for have arrived and am assemblying and confirming the finish.
Attachments
Replace petrol supply pump
Replace petrol supply pump
Replace with 200 RPM planetary gear DC motor for turret rotation control (existing: worm gear motor)
Replace with 200 RPM planetary gear DC motor for turret rotation control (existing: worm gear motor)
Add a hole for motor shaft withdrawal to a new location for installing the planetary gear motor
Add a hole for motor shaft withdrawal to a new location for installing the planetary gear motor
Installation of holes for planetary gear motor installation
Installation of holes for planetary gear motor installation
Move existing worm gear motor position to new planetary gear position
Move existing worm gear motor position to new planetary gear position
Installation of planetary gear motor
Installation of planetary gear motor
Preparing to cut the motor shaft
Preparing to cut the motor shaft
Motor shaft cutting
Motor shaft cutting
Clean up the cutting surface after cutting the motor shaft
Clean up the cutting surface after cutting the motor shaft
Clean up the cutting surface after cutting the motor shaft
Clean up the cutting surface after cutting the motor shaft
Planetary gear motor and new drive gear
Planetary gear motor and new drive gear
Planetary gear motor and new drive gear
Planetary gear motor and new drive gear
Reinstalling the front top cover
Reinstalling the front top cover
Installation of front upper cover retaining bolts
Installation of front upper cover retaining bolts
Installation of the middle upper cover
Installation of the middle upper cover

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Youngjae Bae
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Re: Hand made 1/5 scale K2 Black Panther MBT in Korea.

Post by Youngjae Bae »

The work has been delayed a lot because I'm on a business trip to Moldova, a country with beautiful scenery.
Maybe all the work will be done this week.

Youngjae
Attachments
Today, I will complete this update once I check the signal system of the turret and the operation of the servo
Today, I will complete this update once I check the signal system of the turret and the operation of the servo
I replaced the newly purchased main gun with a servo that will control the top and bottom
I replaced the newly purchased main gun with a servo that will control the top and bottom
I will complete the engine and power transmission modification work and complete the final top plate work
I will complete the engine and power transmission modification work and complete the final top plate work
The limit switch is installed at the bottom of the turret and is not visible from the outside after installation
The limit switch is installed at the bottom of the turret and is not visible from the outside after installation
Limit switch and rear area guide were installed to prevent the main gun of the turret from colliding in the rear area of the turret
Limit switch and rear area guide were installed to prevent the main gun of the turret from colliding in the rear area of the turret
I reduced the length of the chain and removed the idler to ensure the life of the chain
I reduced the length of the chain and removed the idler to ensure the life of the chain
There was a broken tooth in the right bevel gear, so I replaced it this time
There was a broken tooth in the right bevel gear, so I replaced it this time

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Youngjae Bae
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Re: Hand made 1/5 scale K2 Black Panther MBT in Korea.

Post by Youngjae Bae »

I complete the lifting test of the main gun for vertical stabilization and horizontal stabilization of the turret and main gun for preventing collision of the main gun in the rear area today.
The operation worked very well.
I will share this function in a video soon while driving outdoors.
With this, I would like to inform you that all the processes of this upgrade have ended well.
Youngjae
Attachments
The main gun is automatically lifted by rotating the turret to the rear area after the main gun is lowered and returned to its original position when it leaves the area
The main gun is automatically lifted by rotating the turret to the rear area after the main gun is lowered and returned to its original position when it leaves the area
The main gun is automatically lifted by rotating the turret to the rear area after the main gun is lowered and returned to its original position when it leaves the area
The main gun is automatically lifted by rotating the turret to the rear area after the main gun is lowered and returned to its original position when it leaves the area
The main gun is automatically lifted by rotating the turret to the rear area after the main gun is lowered and returned to its original position when it leaves the area
The main gun is automatically lifted by rotating the turret to the rear area after the main gun is lowered and returned to its original position when it leaves the area
It was also confirmed that when the main gun was fired, the shell was moved to the automatic reload position
It was also confirmed that when the main gun was fired, the shell was moved to the automatic reload position
It was also confirmed that when the main gun was fired, the shell was moved to the automatic reload position
It was also confirmed that when the main gun was fired, the shell was moved to the automatic reload position
It was also confirmed that when the main gun was fired, the shell was moved to the automatic reload position
It was also confirmed that when the main gun was fired, the shell was moved to the automatic reload position
I pressed the back of the tank with my foot to check whether the main gun is vertical stabilization
I pressed the back of the tank with my foot to check whether the main gun is vertical stabilization
I pressed the back of the tank with my foot to check whether the main gun is vertical stabilization
I pressed the back of the tank with my foot to check whether the main gun is vertical stabilization
Last edited by Youngjae Bae on Wed May 15, 2024 1:20 pm, edited 2 times in total.

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Chang
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Re: Hand made 1/5 scale K2 Black Panther MBT in Korea.

Post by Chang »

Hi Youngjae,

Very impressive 1/5 Black Panther indeed. Waiting for the function video.

Beside it , there is a Merkava. Is it 1/5 and R/C too?

Kind regards,
Lerh Chang
------------------------------------------------------------------
Es braust unser Panzer im Sturmwind dahin.....

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Re: Hand made 1/5 scale K2 Black Panther MBT in Korea.

Post by Vince Cutajar »

That's really great news.
Does the horizontal stabilization work also? (Hull turns but turret remains pointing in same direction)

Vince

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Re: Hand made 1/5 scale K2 Black Panther MBT in Korea.

Post by Youngjae Bae »

Chang wrote:
Wed May 15, 2024 11:14 am
Hi Youngjae,

Very impressive 1/5 Black Panther indeed. Waiting for the function video.

Beside it , there is a Merkava. Is it 1/5 and R/C too?

Kind regards,
Lerh Chang
Yes, it's a 1/5 scale Merkava RC tank. :D

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Re: Hand made 1/5 scale K2 Black Panther MBT in Korea.

Post by Youngjae Bae »

Vince Cutajar wrote:
Wed May 15, 2024 11:18 am
That's really great news.
Does the horizontal stabilization work also? (Hull turns but turret remains pointing in same direction)

Vince
Yes, horizontal stabilization also works. When the tank pivot turn, the turret is fixed in one direction. :mrgreen:

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