

-0303-
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Everything posted by -0303-
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I this a good time to remind of a 7 year old suggestion?
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Yet another cool cockpit-cam vid of a real Spit IX being flown.
-0303- replied to Art-J's topic in DCS: Spitfire L.F. Mk. IX
I have to try the "up flaps and it'll track straight after touchdown" thing. It does track straight, if you land near perfectly, until it slows down. I really wouldn't know ofc but the P-47 "inertia" while taxiing "feels" more real. I can taxi the Spitfire but it seems more painful than it "should be". -
Yet another cool cockpit-cam vid of a real Spit IX being flown.
-0303- replied to Art-J's topic in DCS: Spitfire L.F. Mk. IX
It tracks straight they said, it will be fun they said. -
Not bug report. Maybe this is how it should work. Flew distance (time-accelerate) Batumi - Sochi Adler, 2850 rpm, 7 boost, speed ~280mph (~230 knots). Temp set -12'C (as cold as settable). Pitot heat on. Below 5000 feet. Same trip, -3'C, IAS works all the way. But at -12'C it malfunctions at Sochi arrival. But (as headline says), fly slow ~100 knots (80-100 mph) for 1-2 minutes and IAS works again. So interpretation could be: pitot heating too weak at -12'C, 280 mph but slowing down reduces wind factor and pitot tube ice melts. One can see how needle drops while flying slow. To eliminate time-accelerate weirdness, I kept speed up (~280mph) circling the field for 5 minutes in real time and noted IAS did not fix itself until I slowed down. ~ Attached a track. 99.5% sure install is 'kosher'. No mods, only thing is MB-339A & A-4E installed "SAVED GAMES" folder but they're not activated here. spit_cold_pitot.trk
- 1 reply
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- spitfire lf mk. ix cw
- spitfire
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Spitfire oil pressure always high and weird starter stuck
-0303- replied to -0303-'s topic in DCS: Spitfire L.F. Mk. IX
Always love learning about the airplane systems. Spitfire cooling is both more complex and simple than I thought. Design makes sense, keep max low drag until absolutely necessary. Control temp by redirecting cooling fluid to the radiator and only open the flap at 115'C. So Spitfire cooling modeling is incomplete with the result that one cannot do what I did. Cruise long distance in cold weather on low power without destroying the engine. Is this on a list for "fixing"?- 11 replies
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- spitfire lf mk. ix cw
- oil temp
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Spitfire oil pressure always high and weird starter stuck
-0303- replied to -0303-'s topic in DCS: Spitfire L.F. Mk. IX
Didn't know the radiator On/Off nature. Always assumed it was gradual. But reading "Pilot's notes" it never says "gradual", it just says "open at 115C".- 11 replies
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- spitfire lf mk. ix cw
- oil temp
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Spitfire oil pressure always high and weird starter stuck
-0303- replied to -0303-'s topic in DCS: Spitfire L.F. Mk. IX
You wrote 115 before editing to 130? DCS manual states: and also so 130 would be way to late.- 11 replies
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- spitfire lf mk. ix cw
- oil temp
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Spitfire oil pressure always high and weird starter stuck
-0303- replied to -0303-'s topic in DCS: Spitfire L.F. Mk. IX
Explains ... a lot. Assuming it's coming. Ok, I was uncertain. Anyway I had, and have, it forward 90% of the time to keep oil pressure down. I only flip the switch rearwards when it's obviously overheating.- 11 replies
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- spitfire lf mk. ix cw
- oil temp
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Spitfire oil pressure always high and weird starter stuck
-0303- replied to -0303-'s topic in DCS: Spitfire L.F. Mk. IX
Found (and bumped just becos ...) my old bug report on "Connecting Ground Power will not turn over engine with drained battery". This linked bug report is specific, well defined, one year old without ED input, an unambiguous bug unlike my unspecific meandering above ...- 11 replies
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- spitfire lf mk. ix cw
- oil temp
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Connecting Ground Power will not turn over engine with drained battery
-0303- replied to -0303-'s topic in Bugs and Problems
Bump one year on. Ping NineLine, BigNewy. This is an unambiguous bug to my mind. Spitfire is (sometimes) unstartable after repair. Longish thread. Post #1 and #2 (see the video) explains the issue without needing to read all the thread. On page 2 I supply a track along with description.- 53 replies
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- volt meter
- battery
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Connecting Ground Power will not turn over engine with drained battery
-0303- replied to -0303-'s topic in Bugs and Problems
Reran my track, took control after prop stopped, battery drained. On requesting "Repair", nothing happens, therefore I assume starter is undamaged.- 53 replies
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- volt meter
- battery
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Multiplayer, so no meaningful track. Don't know how to recreate so therefore not a bug report. 1) Oil pressure Generally oil pressure is at 120 psi or over unless boost & rpm set low. Recommended is 60-120. I find it a bit off that oil press is almost always at 120 or more. Specific case now. Flew 100 nm abouts. Boost 7, rpm 2850. I noted how the oil pressure was stuck at upper range (150). Why? Wasn't stressing engine at all. -3'C degree Aerobatics Online Server. Landed, engine quit. Figure it was the high oil press was the cause. I've noted typically oil pressure drops with radiator closed (switch forward off). Flipping switch rearwards (radiator auto, opening), oil pressure always goes up even more. 2) I long noted occasional weirdness with the starter. Specifically sometimes it refuses to turn over after repair and adding ground power does nothing. Brand new weirdness (same flight as above). Attempting to start after engine quit, it didn't, as expected, assuming engine seized. But, further, volt meter dropped and stayed dropped after releasing starter button. Then I could watch the voltage dropping as if something (starter engine?) just drew tons of current. Immediately after repair finished, prop turned over as if starter engine was still stuck. Watching the voltmeter I clicked the starter button and prop stopped turning and voltage shot up a bit again (as if "unsticking" the starter button). Attempting to start to start after repair. Voltmeter at 10V (which I remember is to low, needs 13-15V). Prop turns over slowly. Add ground power and once again confirm ground power does not work. With ground power, obviously prop should spin over fast enough to start. I even believe starting by battery was the exception in real life. Add a link to my old thread when I find it. One thread (commented but not started by me) on no working ground power. I observed some weird volt flickering, which i note is commented on in linked thread also.
- 11 replies
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- spitfire lf mk. ix cw
- oil temp
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P-47 Oil Temperature gauge needle goes to freezing temperatures
-0303- replied to Spooky32's topic in Bugs and Problems
Cockpit light on? I think you popped a Circuit Breaker. -
jesusspit.trk
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Ping "const". Posted a "I've decided to go crazy with forum tags (tagging)" a while ago. For "search by tag". Can you make existing tags suggests themselves while typing? This already happens when adding additional tags to a new (or existing) topic thread. So the functionality might already exist, just needing to be activated. Now, unless I miss something, one has to make a guess that a tag exists and spell it exactly to be able to search for it. Another useful functionality would be a window listing all tags (and incidence preferably).
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Make a track with a clean install if you think it's wrong. Without serious research, temperature drops at altitude. I know for a fact, on a high summer day, late June (on the ground) one can fly inside a "snowstorm" inside a cloud ~3000 feet up. https://courses.lumenlearning.com/geophysical/chapter/layers-of-the-atmosphere/
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Early models "Bouncy oleo" was interesting. Also, "land 2-3 knots over stall speed", really? Same thing with Seafire's described by same series. I'd thought margins would've been better, at least for purpose built CV Corsair's. Oh, was commenting on part II.
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Tried to provoke it by "winter, cloud & winds", -2C. Ran out of fuel cruising the clouds without icing. Because P-47 bug, I tried P-51, Bf 109 and Spitfire. They all work as they should, ice up pitot and pitot heating clears it. So I-16? Doesn't ice using same conditions. Tried "maximum ice conditions" from "internets". Cannot ice it up. Now I wonder if it's modeled. Internets says maximum icing: https://www.weather.gov/source/zhu/ZHU_Training_Page/icing_stuff/icing/icing.htm
- 7 replies
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- pitot
- pitot tube
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This, or something different?
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Experiment: Precisely the same behavior with a P-51 (-3'C, trip Batumi - Gudauta) with pitot heat deliberately off. IAS decrease in dive, increase with climb ... IAS functionality return within a minute after turning on pitot heater. Landed Gudauta, came to a stop, IAS = 0. So, again I suggest, Pitot heater algorithm doesn't work for P-47. Either because switch doesn't turn it on or it never works at all. Ed/add Spitfire & Bf 109 same behavior. Pitot off (-3'C), IAS stops working after flying "a while", starts working after a "minute" (no timing) on turning pitot heater on. Spitfire same distance Batumi-Gudauta, Bf 109 had to fly ~twice as long before IAS "iced up", ended landing Gelendzhik. So, P-51, Spitfire, Bf 109 pitot heating works while P-47 pitot never "turns on". Run out of fuel I-16 (-3'C) without "icing" pitot. Hmmm...
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Here's a track. Clean install ... yada yada. Default weather except temp set to -3C. Spawn single P-47. Airstart Batumi, accelerate time. Getting beyond Gudauta I noticed speed decrease in dive, then climb 450 mph ... 47pitot.trk Go F10 map, speed up until halfways between Gudauta - Sochi-Adler (time "1840"), it manifests.
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Same thing happened again. IAS stopped working stuck at 350, dropped slight to 300. Pitot heat on, flew maybe 30 minutes. ... and again. <insert screenshot climbing 700 mph at 21K feet climbing 4000 feet/min>. Stuck at 215 mph on ground. The Speed increases with height and vice versa. The kind of real mechanical IAS I'm familiar with depends on surrounding air pressure. Note, only IAS, NOT VSI or Altimeter affected. So, if pitot "frozen shut" I can imagine this making sense (in that it models a frozen pitot). Could be as simple as the "heat pitot tube" algorithm never being activated. Aerobatics Server -3C, minimal wind.