1. #1
    robban75's Avatar Senior Member
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    I need to know at which speeds the best rate of climb was achieved for certain planes, in order to make as exact climb tests as possible!

    For example the Fw 190's best climb speed was 280km/h IAS. (If I'm wrong please correct me!)

    Also, I need to know if the tests should be made using IAS instead of TAS. IAS was used in RL, but in-game climb times can be shortened by climbing by TAS instead of IAS.
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  2. #2
    mortoma's Avatar Senior Member
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    The only way to do that is to get the last version of IL2 Compare, and then you'll not find it always spot on accurate and you'll be missing some of the latest planes. Alternately you could just fly and experiment to find the approximate best Vy speeds for all the planes. That way would take up a monumental amount of your free time though. The 10KPH increments for IAS will not help but some of the pits have airspeed indicators you can actually read without zooming them close up.
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  3. #3
    WOLFMondo's Avatar Senior Member
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    I tend to climb at 350kph TAS in the 190's. Seems to get height quicker that way, certainly lower down at any rate.
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  4. #4
    IRL, (practical) best climb speed for 190 was around 300~310km/h IAS.
    In game, it also works well.
    For me, Fw-190 performance & attribute are implemented best in IL-2.(wait, except the bar)
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  5. #5
    Hurricane II:

    Up to 16,000 feet: 140 mph IAS
    At 21,000 feet: 135 mph IAS
    At 26,000 feet: 130 mph IAS
    At 31,000 feet: 125 mph IAS

    Change to S ratio when the boost has fallen by 5 lb/sq.in.
    At full load 155 mph IAS is the most comfortable climbing speed.

    Max 1 hour climbing limit: +9 lb/sq.in. 2850 rpm.

    Mustang III (V-1710-3 i.e. P-51B/C)

    (i) Speeds for maximum rate of climb:
    160 mph IAS from SL to 30,000 feet
    155 mph IAS from 30,000 to 35,000 feet
    150 mph IAS from 35,000 to 40,000 feet
    145 mph IAS above 40,000 feet

    Max. climbing & level continuous: 46" Hg, 2,700 RPM

    Spitfire V

    The speeds for the maximum rate of climb are as follows:

    From S.L. to 10,000 feet: 170 mph IAS
    From 10,000 to 16,000 feet: 160 mph IAS
    From 16,000 to 21,000 feet: 150mph IAS
    From 21,000 to 26,000 feet: 140 mph IAS
    From 26,000 to 31,000 feet: 130 mph IAS
    From 31,000 to 37,000 feet: 120 mph IAS
    Above 37,000: 115 IAS

    Max Climbing 1 hour limit: +9 lbs/ sq.in. 2,850 RPM.

    Spitfire IX

    The speeds in mph for maximum rate of climb are

    SL to 26,000 feet: 160 IAS
    26,000 to 30,000 feet: 150 IAS
    30,000 to 33,000 feet: 140 IAS
    33,000 to 37,000 feet: 130 IAS
    37,000 to 40,000 feet: 120 IAS
    Above 40,000 feet: 110 IAS

    Max. 1 hr climbing limit, +12lbs/sq.in. 2,850 rpm
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  6. #6
    robban75's Avatar Senior Member
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    According to Kurt Tank the best climb speed for the Fw 190 was 280km/h IAS. What does the manual say?

    Thanks ImpStarDeuce! Excactly what I need! Do you by any chance have the new patch also! j/k
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  7. #7
    ====

    In the air battles with Fw-190a the aircraft Yak-9U showed total superiority. It easily overtook Fw-190a both in the level flight and on the climb and the dive. Superiority especially was manifested with conducting of battle on the vertical lines. The commander of 1 AE (air squadron) Senior Lieutenant Kharchenko in three air battles personally brought down four fw-190a. Lieutenant Petrov in three air battles brought down five aircraft of enemy, including four Fw-190a and one Me -109G-2. Lieutenant kapustin in combat one fought against two fw-190a and both it brought down.
    Commander and technical flight composition of regiment gave Yak-9U VK -107A outstanding flying and operational estimations. They, in particular, noted that the mastery of the aircraft of difficulties does not represent completely accessibly for the young pilots and the technicians of average qualification, it is earlier than worked on the aircraft "yak" with the engine M-105PF. In the technology of aircraft handling of special differences from its predecessors does not have. In air it is simple and steady in all flight conditions, it possesses grow prettier horizontal and, especially, by vertical maneuverability. On the landing it pardons the blunder: high levelling off, "coachboxes" and removal. It is exceptionally reliable and simple in the operation: preparation for the combat mission with the work mechanics motor mechanic occupies, including the preflight inspection, not more than 25... 30 min

    ==

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    Ком?н´¸Ñ€ ¸ лµÑ"но-Ñ"µÑ...н¸Ñ"µÑº¸' сосÑ"?² ¿олº? ´?л¸ ¯º-9У 'К-107 оÑ"л¸Ñ"нÑ"µ лµÑ"ную ¸ эºÑ¿лу?Ñ"?Ñ"*¸онную оÑ"*µнº¸. žн¸, ² Ñ"?сÑ"носÑ"¸, оÑ"мµÑ"?л¸, Ñ"Ñ"о ос²оµн¸µ с?молµÑ"? Ñ"ру´носÑ"µ' нµ ¿Ñ€µ´ÑÑ"?²ляµÑ" ¸ ²¿олнµ ´осÑ"у¿но ´ля моло´Ñ"Ñ... лµÑ"Ñ"¸ºо² ¸ Ñ"µÑ...н¸ºо² ÑÑ€µ´нµ' º²?л¸Ñ"¸º?Ñ"*¸¸, Ñ€?нµµ Ñ€?боÑ"?²Ñˆ¸Ñ... н? с?молµÑ"?Ñ... "¯º" с ´²¸³?Ñ"µлµм œ-105П¤. По Ñ"µÑ...н¸ºµ ¿¸лоÑ"¸Ñ€о²?н¸Ñ с?молµÑ" особÑ"Ñ... оÑ"л¸Ñ"¸' оÑ" с²о¸Ñ... ¿Ñ€µ´ÑˆµÑÑ"²µнн¸ºо² нµ ¸мµµÑ". ' ²оз´ÑƒÑ...µ ¿Ñ€осÑ" ¸ усÑ"о'Ñ"¸² н? ²ÑµÑ... Ñ€µ¶¸м?Ñ... ¿олµÑ"?, обл?´?µÑ" Ñ...оÑ€ошµ' ³оÑ€¸зонÑ"?лÑŒно' ¸, особµнно, ²µÑ€Ñ"¸º?лÑŒно' м?нµ²Ñ€µнносÑ"ью. ? ¿ос?´ºµ ¿Ñ€оÑ"?µÑ" ³Ñ€ÑƒбÑ"µ ош¸бº¸: ²Ñ"соºоµ ²Ñ"Ñ€?²н¸²?н¸µ, "ºозлÑ"" ¸ снос. ˜ÑºлÑŽÑ"¸Ñ"µлÑŒно н?´µ¶µн ¸ ¿Ñ€осÑ" ² эºÑ¿лу?Ñ"?Ñ"*¸¸: ¿о´³оÑ"о²º? º боµ²ому ²Ñ"лµÑ"у ¿Ñ€¸ Ñ€?боÑ"µ мµÑ...?н¸º? ¸ моÑ"оÑ€¸ÑÑ"? з?н¸м?µÑ", ²ºлÑŽÑ"?я ¸ ¿Ñ€µ´¿олµÑ"нÑ"' осмоÑ"Ñ€, нµ большµ 25...30 м
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  8. #8
    Robban, your best bet is to perform a best rate of climb (Vy) determination in game and at a specified fuel loadout and altitude. Vy doesn't change so much with altitude so as to render one determination useless, but the value of Vy will reduce somewhat as you climb so consider that you may want to make a determination at multiple altitudes for best accuracy. If you use a book listed best rate of climb speed and get a 10 minute time to climb you just might find out that using less than the book listed best rate gets you there in 5 minutes. . .I've found some aircraft are right on, others aren't, or don't really suffer at less than optimum climb speeds. Usually the book values are a good place to start though.

    If you have a VSI then the testing is really pretty easy as you can pretty much choose a speed, maintain it smoothly, along with wings level coordinated flight, while observing the VSI, then add 5 knots/kmh/mph, wait for the VSI to stabilize, and see if new VSI indication is higher or lower, if it increases in rate then add another 5 knots/kmh/mph. If you see a decrease in rate, try a lower speed and see if there is an icrease, if there is a decrease in ROC as indicated on the VSI with both an increased and decreased climb speed then you were at the best rate of climb speed/Vy already.

    This is not as accurate as perfroming the a sawtooth climb determination over regular altitude intervals, and if you want more accurate info then use that method outlined here: http://www.dfrc.nasa.gov/Education/O...t/nasclmb.html


    Oh and use IAS.

    I've also heard approx 285 kmh for 190 A's

    Here are some examples which I have on hand:

    Spit IX, XI, and XVI:

    SL to 26K ft ---- 160 mph IAS
    26K to 30K ft ---- 150 mph IAS
    30K to 33K ft ---- 140 mph IAS
    33K to 37K ft ---- 130 mph IAS
    37k to 40K ft ---- 120 mph IAS
    above 40K ft ----- 100 mph IAS


    Tempest Mk V:

    Sea Level to 20,000 feet ---- 185 mph IAS
    20,000 to 24,000 feet ------- 175 mph IAS
    24,000 to 27,000 feet ------- 165 mph IAS
    27,000 to 29,000 feet ------- 160 mph IAS
    29,000 to 31,000 feet ------- 155 mph IAS
    31,000 to 33,000 feet ------- 150 mph IAS
    Above 33,000 feet ---------- 145 mph IAS
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  9. #9
    robban75's Avatar Senior Member
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    Thanks EcoDragon! The Tempest info will soon be usefull!
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  10. #10
    P-40N

    Gross weight 7,000 lbs, 3000 rpm and 44.2 In. Hg.

    S.L to 3,000 feet: 140 mph IAS 2,600 feet/ minute
    At 10,000 feet: 140 mph IAS 2,600 feet/ minute At 15,000 feet: 140 mph IAS 2,600 feet/ minute
    At 20,000 feet: 135 mph IAS 2,400 feet/ minute
    At 25,000 feet: 135 mph IAS 1,650 feet/ minute

    7500 lbs, 3000 rpm, 44.2 In. Hg.

    S.L to 3,000 feet: 145 mph IAS 2,400 feet/ minute
    At 10,000 feet: 145 mph IAS 2,400 feet/ minute At 15,000 feet: 145 mph IAS 2,200 feet/ minute
    At 20,000 feet: 140 mph IAS 1,550 feet/ minute
    At 25,000 feet: 135 mph IAS 950 feet/minute

    8000 lbs, 3000 rpm, 44.2 In. Hg.

    S.L to 3,000 feet: 150 mph IAS 2,200 feet/ minute
    At 10,000 feet: 145 mph IAS 2,200 feet/ minute At 15,000 feet: 145 mph IAS 2,000 feet/ minute
    At 20,000 feet: 140 mph IAS 1,400 feet/ minute
    At 25,000 feet: 135 mph IAS 800 feet/ minute
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