freemind_fly Posted October 6, 2019 Share Posted October 6, 2019 Shouldn't the coolant temperature slowly drop (to ambient temperature) after engine shutdown? Am I missing something? Link to comment Share on other sites More sharing options...
grafspee Posted October 6, 2019 Share Posted October 6, 2019 I dont know exactly where is temp sensor but Engine with all accesories weights about 800kg maby more. Passive cooling will take hours. System specs: I7 14700KF, Gigabyte Z690 Aorus Elite, 64GB DDR4 3600MHz, Gigabyte RTX 4090,Win 11, 48" OLED LG TV + 42" LG LED monitor Link to comment Share on other sites More sharing options...
razo+r Posted October 6, 2019 Share Posted October 6, 2019 What does cooling have to do with weight? Link to comment Share on other sites More sharing options...
grafspee Posted October 6, 2019 Share Posted October 6, 2019 (edited) Alot, cooling 1kg of steel will happen much faster then cooling 900kg of steel. If collat temp sensor is somewhere in engine it will be affected. I found some infor, temp probe is located in coolant tube near wheel well in wing so, it want be affected by engine mass keeping heat high. So temp should drop preaty quick. Edited October 6, 2019 by grafspee System specs: I7 14700KF, Gigabyte Z690 Aorus Elite, 64GB DDR4 3600MHz, Gigabyte RTX 4090,Win 11, 48" OLED LG TV + 42" LG LED monitor Link to comment Share on other sites More sharing options...
freemind_fly Posted October 6, 2019 Author Share Posted October 6, 2019 Passive cooling will take hours. Makes sense! Then let's wait for some hours. Two hours doesn't seem to be enough. Link to comment Share on other sites More sharing options...
grafspee Posted October 6, 2019 Share Posted October 6, 2019 (edited) Makes sense! Then let's wait for some hours. Two hours doesn't seem to be enough. I found out, that temp probe is located in coolant tube close to wheel well in wing so Engine mass wont effect temp drop much. Edited October 6, 2019 by grafspee System specs: I7 14700KF, Gigabyte Z690 Aorus Elite, 64GB DDR4 3600MHz, Gigabyte RTX 4090,Win 11, 48" OLED LG TV + 42" LG LED monitor Link to comment Share on other sites More sharing options...
grafspee Posted October 6, 2019 Share Posted October 6, 2019 (edited) My testing aimbient temp 8.5C I used ground crew Power supply to avoid errors from low battery voltage. After about 1hour of waiting Oilt temp droped to ambient temp Coolant temp droped to 92C Question is, where are those temp probes instaled Temps after restarting engine, let engien idle for 15 seconds , then i turned off ant took screem again. I would gues that Temp probe is located near engine's head which is the hottest part of the engine. that would explain why coolant temp didnt fall a lot during 1 hour test Edited October 6, 2019 by grafspee System specs: I7 14700KF, Gigabyte Z690 Aorus Elite, 64GB DDR4 3600MHz, Gigabyte RTX 4090,Win 11, 48" OLED LG TV + 42" LG LED monitor Link to comment Share on other sites More sharing options...
freemind_fly Posted October 8, 2019 Author Share Posted October 8, 2019 I say bug. Even after hours, it does not go back to the ambient temperature. Link to comment Share on other sites More sharing options...
grafspee Posted October 8, 2019 Share Posted October 8, 2019 (edited) I say bug. Even after hours, it does not go back to the ambient temperature. Hard to say, big castings can cool for moths. Still it is 900kg of metal + its preaty good sealed from outside air. For me it looks ok. Edited October 8, 2019 by grafspee System specs: I7 14700KF, Gigabyte Z690 Aorus Elite, 64GB DDR4 3600MHz, Gigabyte RTX 4090,Win 11, 48" OLED LG TV + 42" LG LED monitor Link to comment Share on other sites More sharing options...
NeilWillis Posted October 8, 2019 Share Posted October 8, 2019 What does cooling have to do with weight? Actually, it is more a question of mass rather than mass times gravity. But physics states that heat is retained by large solid, massive objects for quite a considerable time, and I am positive ED were not coding all this stuff so we could sit in the cockpit for hours to watch it firtstly, increase and then slowly decay. Or am I missing a point here? Link to comment Share on other sites More sharing options...
Art-J Posted October 8, 2019 Share Posted October 8, 2019 I wouldn't really dwell much on it. If ED stated cooling mechanics is being reworked for all warbirds, all our current observations will become outdated soon anyway. i7 9700K @ stock speed, single GTX1070, 32 gigs of RAM, TH Warthog, MFG Crosswind, Win10. Link to comment Share on other sites More sharing options...
freemind_fly Posted October 8, 2019 Author Share Posted October 8, 2019 I wouldn't really dwell much on it. If ED stated cooling mechanics is being reworked for all warbirds, all our current observations will become outdated soon anyway. No big thing to fix. All other - more relevant - temperature readings seem to be pretty accurate. Link to comment Share on other sites More sharing options...
grafspee Posted October 8, 2019 Share Posted October 8, 2019 (edited) Actually, it is more a question of mass rather than mass times gravity. But physics states that heat is retained by large solid, massive objects for quite a considerable time, and I am positive ED were not coding all this stuff so we could sit in the cockpit for hours to watch it firtstly, increase and then slowly decay. Or am I missing a point here? O btw i didnt sit for 1hour, i used time acceleration for this :) I choose weight because weight is what we can measure easy, and it is correlated with mass. Edited October 8, 2019 by grafspee System specs: I7 14700KF, Gigabyte Z690 Aorus Elite, 64GB DDR4 3600MHz, Gigabyte RTX 4090,Win 11, 48" OLED LG TV + 42" LG LED monitor Link to comment Share on other sites More sharing options...
grafspee Posted October 8, 2019 Share Posted October 8, 2019 (edited) My issue with cooling is that, i think that thermostatic valves are not modeled in spitfire, spitfire has extreme problems with holding up to minimum temps even at cruise power settings,where at high alt coolant temp goes down to 40C or even lower. Another thing, that coolant temp is changing a little bit too fast (considering ~900kg engine is nice heat capacitor ) but this is only my impression, This conclusion come out from my observation of coolant doors actuators (P-51)(they are way to slow compare to temp changes during flight), so if this would be a porblem how hard would be to put improved faster actuators for coolant doors ? Just logically thinking. Edited October 8, 2019 by grafspee System specs: I7 14700KF, Gigabyte Z690 Aorus Elite, 64GB DDR4 3600MHz, Gigabyte RTX 4090,Win 11, 48" OLED LG TV + 42" LG LED monitor Link to comment Share on other sites More sharing options...
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