Quote:
Originally Posted by -)-MAILMAN-
With this latest release you cannot follow the actual flight manual or the official documentation any longer. In previous releases operating with a normal power setting you could easily extend away in a 1000 foot/min climb from a Zero or Oscar and eventually from the Ki-61 unless they went to military or war emergency power. With this release you can no longer maintain the correct manifold pressure settings as you climb below 8000 feet. You reach 100% throttle below 5000 feet and have to exceed 100% to keep 44" manifold air pressure which causes you to overheat prior to reaching 8000 feet where you will switch to supercharger two. The plane then appears to revert to the old engine performance above 8000 feet. The F4U-1 uses the Pratt & Whitney R-2800-8 and later -8W engine.
The F6F which uses the Pratt & Whitney R-2800-10 and later -10W engine and a different carburetor (may explain the different MAP setting) than that used on the F4U has the same issues. A normal power climb in the F6F would use an RPM setting of 2550 RPM and 44" MAP using supercharger position one from Sea Level up to 7,000 feet. As you continued to climb you would would maintain 49.5" MAP and change supercharger settings all the way up to critical altitude. You cannot maintain 49.5" MAP all the way up to7,000 feet without exceeding 100% throttle and overheating the engine.
Taking away water injection on the Corsair MkI (F4U-1) & F6F-3 Late should have no bearing on heating issues nor should it change the performance parameters for normal power settings.
At least in the previous versions of the game you could fly by the gages (flight envelope) and not have to rely on the text telling you what percentage of throttle to have. Why have the gages if they aren't reliable?
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Hi Mailman - very good post. Regarding the F4U and 4.11 Il2 compare, the issue seems to be that the altitude for 2nd blower is actualy around 5000-5500ft (cca 1800m as per Il-2 compare graph). I just did a quick test in WIP 4.11.1 and you definitely will be able to fly her by the book now - cold start, taking off at full power (99p no ADI), maintaining climb power of ''44 @ 2550RPM to 5000ft... Exact alt very much depends on the map (atm. pressure etc) as it did in RL, so I simply tend to switch the blower when my throttle hits the limit. Then ''48 @ 2550RPM... With my climb speed reasonably high (around 160MPH IAS), cowling flaps 2/3 open, CHT around 200C, oil temp around 100, slightly lower when I get higher up, switching to high blower appropriately (around 15k) and no issue with overheating whatsoever.
Good news is also that all the temp gauges (all of them, yes- on all aircraft) will be working correctly in 4.11.1. With MFP / RPM setting you state, you will be able to monitor your temps (oil is more likely to give you some grief than CHT here, mind you Corsairs temp gauges are OK already in 4.11). Tested on rather ambient Crimea map using earliest F4U, not sure about hotter environments. I am also not able to comment if the supercharger alts are correct and in match with the manual as I don't have it with me but quick search on WWIIacperformance shows pretty much identical climb curve (ac No 02155)... Can't do the same test with clean 4.11 version at the moment, but I will check that as well later on and come back to you as I am not sure how much of that is related to the take-off issue. Hope that helped.