frumpy Posted April 10, 2020 Share Posted April 10, 2020 (edited) Hey there, I don't get the rational on firing the internal gun of the ZA. After takeoff, RCtrl +3 for master arm, LAlt+1/2 for launch & HUD LShift + 0 to arm cannon Explosive charge button LShift+LCtrl+LAlt+A (Gun+GS, switch is moved even if cover is on) LCtrl+Space Then it does not fire, I think it should. After flying a bit around, suddenly the gun worked. After a bit more playing with the buttons (I don't remember which ones) the gun stopped working, but the RPM dropped when pressing the firebutton. What am I doing wrong? p.s. the RPM drop can be replicated by RCtrl +3 LAlt+1/2 LShift + 0 LCtrl+Space Firel39za_rpm_decrease.trk Edited April 10, 2020 by frumpy Link to comment Share on other sites More sharing options...
-Martin- Posted April 10, 2020 Share Posted April 10, 2020 (edited) Hello, In order to fire the gun you must have right speed (>400kph IAS) and right AOA (dive on a ground target should do). You will notice that AOA advisory lights up when you cannot fire the gun. It is designed that way so fumes are not ingested by the engine. For the same reason RPM drops automatically. It is a safety measure. Btw, there is a button on the central piedestal to disable the limitter. It is for ground testing, but you may try to use it in the air to fire the gun under any speed and AOA. Edited April 10, 2020 by -Martin- 1 1 Link to comment Share on other sites More sharing options...
paco2002 Posted April 10, 2020 Share Posted April 10, 2020 That's correct, the RPMs Will drop automatically to avoid ingestions of fumes from the guns. More RPMs = More possibilities to ingest fumes to the engine. 1 Link to comment Share on other sites More sharing options...
frumpy Posted April 10, 2020 Author Share Posted April 10, 2020 Thats good news! Seems like a bit of RTFM. Thanks guys! :) Link to comment Share on other sites More sharing options...
Dehuman Posted April 11, 2020 Share Posted April 11, 2020 That's correct, the RPMs Will drop automatically to avoid ingestions of fumes from the guns. More RPMs = More possibilities to ingest fumes to the engine. It will drop RPMs all the way down to nothing. I can't see anything about this in the manual, I've always assumed it was a poorly implemented emulation of gas ingestion. 1 Link to comment Share on other sites More sharing options...
-Martin- Posted April 11, 2020 Share Posted April 11, 2020 (edited) Hello, It will drop RPMs all the way down to nothing. I can't see anything about this in the manual, I've always assumed it was a poorly implemented emulation of gas ingestion. p. 235 of the manual PT-12 engine overheat control system The РТ-12 system for the L-39ZA has an additional function designed for decreasing fuel supply from the main fuel system while firing the gun. This precaution is made to prevent the gunpowder gases from getting into the inlet. The РТ-12 system starts operation when the gun firing mode is selected and the trigger button is pressed. Fuel supply decrease occurs the whole time when the trigger button is pressed; the engine speed can be decreased down to idle. After the trigger button is released, the speed returns to its previous value. By the way, if you do not charge the gun and press the trigger, PT-12 will engage and decrease your RPM without the gun actually firing. This shows that it does not try to emulate gas ingestion; instead it behaves as intended. Edited April 11, 2020 by -Martin- 1 Link to comment Share on other sites More sharing options...
Alpenwolf Posted October 27, 2020 Share Posted October 27, 2020 Btw, there is a button on the central piedestal to disable the limitter. It is for ground testing, but you may try to use it in the air to fire the gun under any speed and AOA. What button?! I read the manual (years ago) and been flying the L-39 for years and never seen that?! I never cared to look it up because I thought it wasn't implemented in the first place. Should read the manual again, I guess. Cold War 1947 - 1991 Discord Helicopters Tournaments Combined Arms Tournaments You can help me with keeping up the server via PayPal donations: hokumyounis@yahoo.com Link to comment Share on other sites More sharing options...
-Martin- Posted October 27, 2020 Share Posted October 27, 2020 What button?! I read the manual (years ago) and been flying the L-39 for years and never seen that?! I never cared to look it up because I thought it wasn't implemented in the first place. Should read the manual again, I guess. Yes, it is hard to notice it behind the stick; a tiny button so easy to overlook. It works, but you need to first turn the gun on. Once you turn it off and on again, you need to press the button again. One issue with it is that you cannot bind it to your hotas so it is bit inpractical if you try to use it during dogfights to get over the AOA limittation. I guess the button is so obscured that ED staff themselves overlooked it when they did the keybinds. 1 Link to comment Share on other sites More sharing options...
Alpenwolf Posted October 27, 2020 Share Posted October 27, 2020 Yes, it is hard to notice it behind the stick; a tiny button so easy to overlook. It works, but you need to first turn the gun on. Once you turn it off and on again, you need to press the button again. One issue with it is that you cannot bind it to your hotas so it is bit inpractical if you try to use it during dogfights to get over the AOA limittation. I guess the button is so obscured that ED staff themselves overlooked it when they did the keybinds. Good God, I just saw it for the first time ;) I pressed the button but firing the gun was still not possible. So it is not implemented as I always thought it to be? Cold War 1947 - 1991 Discord Helicopters Tournaments Combined Arms Tournaments You can help me with keeping up the server via PayPal donations: hokumyounis@yahoo.com Link to comment Share on other sites More sharing options...
-Martin- Posted October 27, 2020 Share Posted October 27, 2020 Good God, I just saw it for the first time ;) I pressed the button but firing the gun was still not possible. So it is not implemented as I always thought it to be? It is implemented. You still need to arm the gun as usually, only thing it does is disabling the limitter. You can even fire the gun on the ground and blow your front wheel away. Just make sure that you have armed evertything; master arm, trigger circuit breaker, trigger safety, and that the gun is on and armed before you press the button. Link to comment Share on other sites More sharing options...
Alpenwolf Posted October 29, 2020 Share Posted October 29, 2020 It is implemented. You still need to arm the gun as usually, only thing it does is disabling the limitter. You can even fire the gun on the ground and blow your front wheel away. Just make sure that you have armed evertything; master arm, trigger circuit breaker, trigger safety, and that the gun is on and armed before you press the button. Yeah, it works. Switched back to IR missiles during a fight and after going back to guns it wasn't implemented any more. So yeah, one has got to do it every time. Thanks, mate! Dogfighting F-5's is now even easier :smilewink: Cold War 1947 - 1991 Discord Helicopters Tournaments Combined Arms Tournaments You can help me with keeping up the server via PayPal donations: hokumyounis@yahoo.com Link to comment Share on other sites More sharing options...
Tiramisu Posted August 22, 2021 Share Posted August 22, 2021 It looks like your engines only take damage, if your cannon bursts are too long with the gun deblock mode. Very short burst are ok, so there should be no limit there. But I think there is no override button for launching AA-missiles at lower speeds. There are also machine guns, but they are very weak. Even unguided rockets are better in dogfights than MGs. Link to comment Share on other sites More sharing options...
Tiramisu Posted August 28, 2021 Share Posted August 28, 2021 (edited) I have found a way to bind the gun deblock button. You can either download my attachment and overwrite your game files with it or edit the files yourself. If you want to edit it, go to your install directory and open the file ...\DCSWorld\Mods\aircraft\L-39C\Input\L-39ZA\joystick\default.lua with an editor. There you can find a lot of entries between two curly brackets which looks like this: join(res.keyCommands,{ ... }) Between the brackets add this line: {category = {_('Center Pedestal'), _('Armament Control Panel'), _('Only Front Cockpit')}, name = _('Deblock Guns'), cockpit_device_id = devices.WEAPON_SYSTEM, down = 3077, up = 3077, value_down = 1, value_up = 0 }, If you want to add this for keyboard bindings as well, you need to do the same for the file ...\DCSWorld\Mods\aircraft\L-39C\Input\L-39ZA\keyboard\default.lua Obviously, this only makes sense for the L-39ZA, because the L-39C has no cannons. Also note that setting the arms-switch for the cannons back to off and then on again, will automatically re-enable the gunblock limitation. Credits: I have learned this how-to from https://www.reddit.com/r/hoggit/comments/7wli5i/how_to_add_extra_bindings_for_clickable_cockpit/ Input Modifications v1.0.zip Edited August 28, 2021 by Tiramisu Link to comment Share on other sites More sharing options...
Munkwolf Posted September 9, 2021 Share Posted September 9, 2021 On 8/28/2021 at 4:51 PM, Tiramisu said: I have found a way to bind the gun deblock button. You can either download my attachment and overwrite your game files with it or edit the files yourself. Just a heads up I've got the deblock and a few other binds for the L-39 in the keybinds project: https://github.com/Munkwolf/dcs-community-keybinds/blob/main/InputCommands/L-39C/Input/L-39ZA/joystick/default.lua That file is formatted for use with Quaggles mod: https://github.com/Quaggles/dcs-input-command-injector Using Quaggles mod lets you put your custom binds in your Saved Games\DCS folder, where they won't get wiped out by updates 1 Link to comment Share on other sites More sharing options...
Dr_Arrow Posted September 16, 2021 Share Posted September 16, 2021 On 8/22/2021 at 2:25 AM, Tiramisu said: It looks like your engines only take damage, if your cannon bursts are too long with the gun deblock mode. Very short burst are ok, so there should be no limit there. But I think there is no override button for launching AA-missiles at lower speeds. There are also machine guns, but they are very weak. Even unguided rockets are better in dogfights than MGs. De-block button probably should not have been implemented. Its use during flight is strictly forbidden (IRL career ending). The button is used exclusively on the ground for maintenance/testing of the gun's mechanisms. Link to comment Share on other sites More sharing options...
Tiramisu Posted September 17, 2021 Share Posted September 17, 2021 Thanks, that is interesting to know. But if it means win or death during dogfights, then I rather choose this button to win a dogfight. Probably those situations never occur in real life, but DCS is a sandbox simulator in the end. @Munkwolf: Thanks for the link. I will take a look at that. Link to comment Share on other sites More sharing options...
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