View Full Version : Best climb speeds

02-04-2006, 01:49 PM
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.

02-04-2006, 01:59 PM
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.

02-04-2006, 01:59 PM
I tend to climb at 350kph TAS in the 190's. Seems to get height quicker that way, certainly lower down at any rate.

02-04-2006, 02:26 PM
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)

02-04-2006, 02:28 PM
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

02-04-2006, 02:58 PM
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 http://forums.ubi.com/images/smilies/16x16_smiley-wink.gif

02-04-2006, 03:14 PM

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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02-04-2006, 11:37 PM
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/OnlineEd/Intro2Flight/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

02-08-2006, 06:39 AM
Thanks EcoDragon! The Tempest info will soon be usefull! http://forums.ubi.com/images/smilies/16x16_smiley-happy.gif

02-08-2006, 06:57 AM

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

02-08-2006, 07:38 AM
Mosquito: (EDIT FB 6)

From the Pilot€s Notes (a post-war publication)

i) The speed for maximum rate of climb is 150 knots (173mph by my calc)
ii)€¦€¦..Above 18,000 ft reduce the airspeed by 2 knots per 1000 ft.

02-08-2006, 12:33 PM
Thanks guys! http://forums.ubi.com/images/smilies/16x16_smiley-happy.gif

Does anybody have climb speeds for russian planes?

02-08-2006, 12:58 PM
Let me just copy&paste data from soviet instruction for La-5, I guess everything will be clear http://forums.ubi.com/groupee_common/emoticons/icon_wink.gif:
оÑ" зµмл¸ ´о 2000 м 275 ºм/Ñ"?с
оÑ" 2000 ´о 3000 м 270 ºм/Ñ"?с
оÑ" 3000 ´о 4000 м 265 ºм/Ñ"?с
оÑ" 4000 ´о 5000 м 260 ºм/Ñ"?с
оÑ" 5000 ´о 6000 м 260 ºм/Ñ"?с
оÑ" 6000 ´о 7000 м 250 ºм/Ñ"?с
оÑ" 7000 ´о 8000 м 240 ºм/Ñ"?с
оÑ" 8000 ´о 9000 м 230 ºм/Ñ"?с
²Ñ"шµ 9000 м 210€"220 ºм/Ñ"?с

And the same for Yak-3:
up to 5000 м - 280 kmh,
above 5000 м - 270 kmh.

All speeds IAS of course.

02-08-2006, 01:11 PM
Excellent! Thanks Kocur! http://forums.ubi.com/images/smilies/16x16_smiley-happy.gif

I wonder if those speeds are applicable for the La-5FN and La-7 as well?

02-08-2006, 01:23 PM
I dont know http://forums.ubi.com/groupee_common/emoticons/icon_frown.gif This is for the first La-5 with M-82 (not FN, not even F) and high aft fuselage. OTOH wings remained the same in further versions.

02-08-2006, 01:45 PM
Hi robban75.
This is a quote from an RAF evaluation of a captured FW190. I'm sorry, I didn't make a record of where I found the document. I think it holds good for all marks up to and including the A8.

The rate of climb up to 18,000 ft |5,488 m) under maximum continuous climbing conditions at 1.35 atmospheres boost 2,450 r.p.m., 165 m.p.h. (265.5 km/h IAS)is between 3,000 and 3,250 ft/min |15.24 to 16.51 m/sec|. The initial rate of climb when pulling up from level flight at fast cruising speed is high and the angle steep, and from a dive is phenomenal. It is considered that the de-rated version of the Fw 190 is unlikely to be met above 25,000 ft |7,622 mj as the power of the engine starts falling off at 22,000 ft and by 25,000 ft has fallen off considerably. It is not possible to give the rate of climb at this altitude."

For the IL2 I think the best climb was 240 km/h IAS at full throttle.

For the Lagg3:
"67. with the climb to hold the optimum speeds:
Height from the earth optimum speeds to
4000 m of 270 km/h
5000 m of 260 km/h
6000 m of 250 km/h
7000 m of 240 km/h
8000 m of 230 km/h
9000 m of 220 km/h
is higher than 9000 200-220km/h"

02-08-2006, 01:59 PM
Check PM Robban--it's a doozy

02-08-2006, 02:17 PM
Thanks OMK_Hand, that's usefull information! http://forums.ubi.com/images/smilies/16x16_smiley-happy.gif


Got it!