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grafspee

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Everything posted by grafspee

  1. Sounds were reworked and updated recently and i like them a lot. Cockpit wise i think it didn't change since release. Take note that Spitfire which are you talking about is missing something like 90% functionality.
  2. I would like that engine modeling would be at much higher level then external model I can accept textures gaps or any other imperfections but anything which would affect performance of the plane is no go for me.
  3. In other Pilot's notes same thing 45" throttle alone, for 52 turbo is needed.
  4. So i tested it even with throttle and boost full on you still getting 46" for take off. So part in manual which says to not draw more power from engine to build up speed faster is pointless here, since MP no near 52 at take off. how to exceed 52" at take off to work up speed faster then, looks by manual that it was possible. I could not manage it. Am i missing something here ? I had impression that turbocharger will add couple MP at beginning of take off roll, but looks like it does nothing. MP starts increasing slightly when approaching 80mph and reaching 52" at 100mph. Maybe this warning is for heavy loaded P-47s which require speed +120mph for lift off than you can possibly exceed 52" before lift off.
  5. I just tested it, and this is very suspicious for me since P-47 manual often mention to not draw more power to get speed up during take off roll, this indicate that it is possible to draw more then 52 from engine at take off. So i tested it I pushed throttle and boost lever to max. Looks like i got 52" at lift off speed and i was not able to exceed 52" at take off roll, so i think it is time for ED to comment on that matter. Looks like boost lever has no impact on MP until some airspeed is build up. I remember talking about turbo lag but is this lag so massive at low speed ?
  6. This is from RL P-47 look at MP and rpm during engine run up /check, i can see 30" of MP and 2300rpm but our dcs version do 2000rpm at 30" is it different prop ore something else. I wish to know which version exactly ED based of their simulation.
  7. I think in manual we wont find clear answer. But from this manual it looks like p-47 need turbo to get 52" if not i don't see any logic in that part. I check recently, it is as well impossible to get 52' from throttle alone in famous ww2 combat sim which name i cant type in but i think every one knows. i checked couple YouTube videos with pilot cam, unfortunately, modern p-47 don't exceed 40" even at take off. Looks like 40" is sufficient for take off, so it is logical that most of the take offs mentioned in manuale are used w/o turbo since 40" si good enough. Later i found in P-47N manual that 35' is enough boost to lift off w/o external load. It also confirms that only heavy loaded P-47 would require turbo boost for take off.
  8. Manual says that for shorter take off boost is required and you still has doubts about that ? So he is implying that 52" is available at every possible airfield elevation ?? I don't know from where did they took that data. In all manuals i come across boost is required for max permissible take off. chuck's guide is not manual for me. same as Greg's videos. Anyway Greg's video about it, is very confusing, because in one instance he says that throttle alone gives 52" and in next sentence says that turbo can be used for take off, why when 52" is achievable with throttle alone and this is max what you can draw from this engine for take off. This wasn't confusing for you i can see. I went through B C D manuals and in all of them turbocharger is used for take off.
  9. It does not matter, with boost or w/o, 40" is max take off power for 91 GRADE. There is no point to provide this information. Lets say that throttle alone gives max MP of 46" at SL What about airfield with elevation 600ft ? Above statement wont be true anymore. At 600ft Throttle alone will not give 46" anymore, it will get less so you will have to use turbocharger to get to 46"
  10. It depends, if P-47 was used in trainer scenario, max take off power was 40" for 91grade fuel, then throttle alone was sufficient. Like i said earlier, P-47 does not have any kind of automatic boost control like in P-51, this mean that max MP will change despite that throttle is set to max. In p-51 you open throttle too 100% and engine uses 1st and second stage supercharger, but throttle valve isn't opened 100%, automatic boost regulator will open it to get 61". In case of P-47 you can boost much higher then 52' allowed for take off. This is case for late D models at least. This is from B and C model where throttle and boost lever didn't have interconnection. You can read that using turbine allow for shorter take off this is the ultimate proof that throttle alone cant get 52". This is how i do it in DCS p-47, i have found boost lever spot for 52" and at take off i move throttle to 100" since i have boost lever pre set for 52" i get 52"
  11. It's big tank, take time to drain it and replace fuel level sensor.
  12. Main thing which you have to monitor is relation between MP and RPM Those 2 are the most important. So look at engine limitation chart and apply those rules. RPM is limiting factor for available MP, for example at 2700 rpm max safe MP is 46" going a little bit above this 48" wont hurt the engine. But flying at 61' and 2700rpm will kill engine. Same in case of super low rpm like 2000rpm and 40" So for now the safest way is to just stick to this chart. As far as i know, only thing which was changed recently is ground handling. Any engine or FM related things weren't changed since i fly p-51 in DCS which is couple of years. If it comes to operation of carburetor air control there is no easiest way just to show this. If you switch to filter air position you loose dynamic pressure. MP increase from RAM air depends on IAS, higher IAS gives higher MP gain. So at low speeds like climb speed 160-170IAS there is little gain from RAM air, but at speeds above gain become much higher.
  13. I haven't seen in any of p-47 manuals, statement that 52" is achievable by throttle alone. This is the first point. Second point is that this way is beneficial for engine power output, since supercharger is geared to lower MP, while in high speed SL flight you can keep full throttle and not exceeding 52".
  14. Max power take off is always top fun for me in this bird + superb sounds.
  15. I think, one opportunity to get big difference in power output is to warm up one of the engine improperly, that one engine get serious spark plug fouling. Then you will get strong yawing at take off at full power
  16. I hope not, this asymmetric power is very important thing for flying plane prior to any engine synch tech. For max power you go all the way on the throttle and prop speed rpm, but for climb or cruise you need to sync your engines at MP and rpm gauges, not every time same throttle or prop levers gives same results.
  17. Nope i didn't take data from Wikipedia. Yes stall speed for power on is lower but it is still 104-110mph under typical approach conditions so for relatively light plane. About D-9 stall speed i don't know, i have no D-9 manuals or any trials documents. I only know that it flies very similar to P-51 based on DCS experience. D-9 with much higher power to weigh ration wont be an easy target. Stall speed is not finally word ofc win will go for plane which can sustain that low speed and not bleed energy and go down.
  18. Stall speed at 17k pounds is 120mph for clear configuration so this give idea of slow speed handling of the mosquito. P-51D at 9.5k pounds clean config stall speed is 103mph this give clear idea how mosquito will behave at slow speeds. Not too well.
  19. I would say that P-47 not quite fit as first WW2 module, simply because the complexity of engine management, things like oil/engine cooling/intercooler/turbo boost control are done manually in P-47, when in other warbirds excluding i-16 those things are controlled automatically. On the other hand if you dedicate some time to read Manual, i mean original manual or pilot's notes for P-47 and if you learn what needs to be learnt, flying dogfighting or ground pounding should not bring trouble.
  20. Often first opportunity to get some discount is to by pre-order, for example Mi-24 has -30% for pre order.
  21. For take off use Max rpm and at least 40" using lower rpm and lower MP you will clag your engine. Second oil temp minimum 30C-40C, head temps i don't care.
  22. Max alt for P-51 is 42k ft, but don't expect that you can do there anything more then just flying straight. Main factor is average lower airspeed, second is higher mach those 2 things handicap available G. At alt 30k you are limited to gentle flat turns, forget about loops Every single plane suffer from high alt, warbirds and modern jets as well. Climb to 70k and try do some stuff. 300mph at SL is not the same as 300mph at 20k due to higher mach number. So you need higher entry speed to do the same thing. All speeds are IAS.
  23. If we get merlin 25 in DCs mosquitos, then max take off power setting is 18lbs at 3000rpm and this shoots out almost 1500hp, and you have 2 engines, so almost 3000hp, i thin it wont need airfields longer then P-47 need. If we get merlin 23 it is limited t o14lbs which still provide a lot of power for take off. Which is a lot comparing to P-47 which weights about the same.
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