GeorgeLKMT Posted November 16, 2015 Share Posted November 16, 2015 BUG?: The snowflake symbol on the caution and advisory lights panel should light up when the anti-icing system is put into manual mode. The portion of the manual describing the system talks only about the green light under it, but there's also: Snowflake symbol Icing conditions have been detected by the icing sensor, or the system has been activated manually. ■ L-39C/ZA Czech cockpit mod ■ My DCS skins ■ Link to comment Share on other sites More sharing options...
hoochiekoo Posted December 17, 2015 Share Posted December 17, 2015 In my opinion, icing condition will be detected by the system. But even I turn off the Anti-icing system and let the snowflake signal show all the time. I do not notice any problem with the engine and there is no icing on the windshield occur. Link to comment Share on other sites More sharing options...
AstroEma Posted December 17, 2015 Share Posted December 17, 2015 Was flying at 25000ft over NTTR last night and the light came on as well. Turned on the Pitot heat, but otherwise did not notice any change in engine behavior or flying characteristics. Probably something to look at? Kaby Lake @ 4.6Ghz - Gigabyte Z170-D3H - 16Gb DDR4 - Gigabyte GTX 1080 G1 OC - Samsung EVO 250Gb SSD - Seagate 1 Tb HDD - HTC Vive - Rift CV1 Link to comment Share on other sites More sharing options...
Phantom453 Posted December 18, 2015 Share Posted December 18, 2015 It was my understanding that the "snowfake" light just advises that icing conditions exist and then the light below that comes on once the anti-icing system activates. Just from memory though. I haven't double checked at this stage. Link to comment Share on other sites More sharing options...
GeorgeLKMT Posted December 18, 2015 Author Share Posted December 18, 2015 (edited) It was my understanding that the "snowfake" light just advises that icing conditions exist and then the light below that comes on once the anti-icing system activates. Just from memory though. I haven't double checked at this stage. Correct, but I'm talking about manual mode and even included a quote from the manual where it's mentioned (118). Edited December 18, 2015 by GeorgeLKMT ■ L-39C/ZA Czech cockpit mod ■ My DCS skins ■ Link to comment Share on other sites More sharing options...
Spetz Posted January 5, 2016 Share Posted January 5, 2016 (edited) I haven't experienced icing in the 39 yet, anyone else? I don't mean the icing light going on but actual effects on the aircraft.. Edited January 5, 2016 by Spetz Link to comment Share on other sites More sharing options...
Ramsay Posted January 5, 2016 Share Posted January 5, 2016 (edited) IIRC I had a frozen pitot (lost IAS) after a 4am Maykop-Khanskaya take off where I didn't set pitot heating as I thought the auto-deice would take care of the pitots as well the engine manifold intake. IAS quickly returned once I turned on the pitot heating Temp was about 1°C and dewpoint -3°C with rain and a 1000m cloud base. Weather was based off RL METAR data from Oct/Nov but I reduced the 10m/s crosswind to make the L-39C's taxi easier. I think this video shows the intake anti-icing valve/ducting at 1m42s and 4m29s Edited January 5, 2016 by Ramsay i9 9900K @4.7GHz, 64GB DDR4, RTX4070 12GB, 1+2TB NVMe, 6+4TB HD, 4+1TB SSD, Winwing Orion 2 F-15EX Throttle + F-16EX Stick, TPR Pedals, TIR5, Win 10 Pro x64, 1920X1080 Link to comment Share on other sites More sharing options...
GeorgeLKMT Posted April 8, 2017 Author Share Posted April 8, 2017 Tested in 1.5.6.3930.271, still present. ■ L-39C/ZA Czech cockpit mod ■ My DCS skins ■ Link to comment Share on other sites More sharing options...
derelor Posted April 10, 2017 Share Posted April 10, 2017 I was told that the simulated behavior is in accordance with Russian flight manuals. As far as I understand it, from looking at the attached circuit diagrams, the Snowflake symbol is controlled by the R2 relay only and can't be enabled by the "Manual" switch. It may be an error in non-Russian -1's or simply modified wiring. Please let me know if you think my interpretation of the circuit diagrams is wrong. 1338 - beyond leet ED Forum rules EN|DE|RU Link to comment Share on other sites More sharing options...
GeorgeLKMT Posted April 10, 2017 Author Share Posted April 10, 2017 (edited) It might as well be different wiring, especially if those russian diagrams are older than 2000, which is the date of the manual that says it should be ON in manual mode. I don't have any drawings of that system myself, so I would need to ask around to know any better. Edited April 10, 2017 by GeorgeLKMT ■ L-39C/ZA Czech cockpit mod ■ My DCS skins ■ Link to comment Share on other sites More sharing options...
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