Armortek

I have used dry lubricants and common red grease by reducing resistance to the recoil function.
Natural return action is good for grease oil.
Additional spring installations were also considered to be easy in case of insufficient spring tension to return the main gun or lack of grease oil lubrication.
When I got home, a 700ml air tank arrived from the U.S.
I will implement the recoil action as soon as the solenoid valve arrives.
The two-way BEC will be connected to the existing servo line and 24V from the power supply spare port to connect to the solenoid valve through the BEC.

Youngjae

Looking really good Youngjae. How much air pressure do you think you will need?

Vince

Hi Youngjae...I am working on something very similar ! but I am going with CO2 with a pressure regulator ...the compressed air tank will drop in pressure quickly after a few cycles needing to be re-pressurized often

You’re engineering is outstanding, that looks very well thought through. I developed a very similar system for my Pz III which, in the Ausf N version had a very much smaller barrel. I used a Robarts undercarriage retract system, consisting of a 100 psi 700ml tank, two way valve and the most powerful piston they offer and it was just satisfactory. I very much doubt whether that system would have even moved the Chieftain barrel and would certainly have run out of pressure very quickly, as it was a total loss system, which vented to air. I think I might have been better off using CO2 but that requires more support. I also wondered whether I could adapt the hydraulic systems used in model plant. Good luck with all you’re doing, it’s inspiring to see.

Vince Cutajar wrote: ↑

Fri Feb 21, 2020 11:41 am

Looking really good Youngjae. How much air pressure do you think you will need?

Vince

Its operating range is 2 ~ 7 kg/cm2, and I set the pressure to use 3 kg/cm2.
There are so many different units of pressure that each person uses according to his or her personal preference.^^
Youngjae

mark j. radick wrote: ↑

Fri Feb 21, 2020 2:45 pm

Hi Youngjae...I am working on something very similar ! but I am going with CO2 with a pressure regulator ...the compressed air tank will drop in pressure quickly after a few cycles needing to be re-pressurized often

I have run rc Jet before.
It also predicts that air pressure will drop quickly and not shoot much when the main gun is launched like a retract drive.
But I have a 24v portable air compressor so I'm going to charge it from time to time.
And then...... I'm thinking maybe I'll put this little air compressor inside if I can use the space on the turret.

Youngjae

Stephen White wrote: ↑

Fri Feb 21, 2020 6:00 pm

You’re engineering is outstanding, that looks very well thought through. I developed a very similar system for my Pz III which, in the Ausf N version had a very much smaller barrel. I used a Robarts undercarriage retract system, consisting of a 100 psi 700ml tank, two way valve and the most powerful piston they offer and it was just satisfactory. I very much doubt whether that system would have even moved the Chieftain barrel and would certainly have run out of pressure very quickly, as it was a total loss system, which vented to air. I think I might have been better off using CO2 but that requires more support. I also wondered whether I could adapt the hydraulic systems used in model plant. Good luck with all you’re doing, it’s inspiring to see.

I think the main gin has enough compression because I use two industrial pneumatic pistons with a bore diameter of 16mm.
And I'm thinking of an electric 24v for a fast actuators that respond to the stabilization of the main gun.
It is not applied to the recoil method, but to the rise and fall of the main gun, I also designed the hydraulic system with Plan B.
I personally expect that the electric power system will be the best way to solve the problem.
I only want parts to arrive as soon as possible for all experiments.
Your encouragement is always a big help.

Youngjae

To reinforce the air system mentioned in the previous chapter,
I prepared 4 springs according to the design after the recoil operation of the main gun, a successful return has been made
and also ordered an air compressor system to be installed on the chieftain turret to replenish the air consumed by the main gun.
The air system added a small pressure switch, a 24V diaphragm air pump and a 300cc small air tank.
This has determined the solenoid valve, the ESC to control it, and various air fittings.
To provide power and space for all these changes, I replaced lead batteries with 24V 30AH lithium-ion batteries.
I sincerely hope that these arrangements will be combined and the action I hope will be achieved.

Youngjae

Recoil System Modification diagram

Wow! I see you are adding dry ice smoke also. Add a little water to the dry ice and it produces lots of white smoke.

Vince

Vince Cutajar wrote: ↑

Sun Feb 23, 2020 10:24 pm

Wow! I see you are adding dry ice smoke also. Add a little water to the dry ice and it produces lots of white smoke.

Vince

Yes, it is. I thought that if I demonstrated the white smoke that was shown in the brief cast-off motion with dry ice and water, I could reduce the power use of the smoke generator. Of course, the demonstration will be short.

Youngjae

About a month ago, I went through the loss of a sprocket in the right direction.
Fortunately, with the help of Kian, a repairable part arrived with my King Tiger yesterday, so I finished assembling and painting just now.

Not long ago, I had been driving my Chieftain so hard that I experienced various situations and such experiences upgraded my view of radio communication or mechanical response.
And I learned about the important management points that need to repair the Chieftain whenever I have time.
Once again, thank you for Armortek's management service.

Youngjae

Hi Youngjae

May I ask what is wrong with the recoil unit Armortek supplied? I was under the impression that the recoil speed is controlled by a high torque servo (depression and run out). Do you know what sort of distance the recoil travels on the standard Armortek unit?
"Gun smoke"
Once I fitted CO2 semi auto pistol breach unit to a small co-axis Tiger mantle machine gun port. The C02 gas from the pistol through the gun port looked good, not much volume of "smoke", but ok, It was dependent on the environment though, ambient temp etc. It was always only going to be reciprocating single shot.

Talcum powder + CO2! now there's an idea (not a good one), used only in a big open field, on your lone some with googles and a mask standing up wind

> Talcum powder + CO2!

Explosive and extinguisher, all rolled into one...

Adrian.

Hi John

There are no particular problems with the recoil provided by Armortek.
The rebound distance from the servo was about 3cm long.
In the case of my Chieftain, the axis of the servo movement was moving forward and backward in the right root of the main gun, causing unwanted rotational motion, which resulted in excessive force applied to the servo arm in the process of fixing it, which led to the servo movement resistance being replaced twice.
I've also changed the way I work by causing problems on my own in the process of making the stroke stand out(about 5.5cm). My modification has nothing to do with the rebound distance and speed of the real Chieftain.
And the Gunsmoke you said was very interesting.
It looks like it's worth a try.

Youngjae