605 Scorpion,

The 1% visual was created by Josh ZUYAX Ziebarth as were the other AvHistory Hurricanes err Spitfires.

nickle,

264mph is pretty fast for a climb speed in a WWII aircraft.

Why not use the 164mph IAS of the real aircraft?

But hey, the quoted numbers are BS anyway. In 3 minutes the 2400ft+2300ft+2200ft=6900ft, a little short of the 10,000ft climb request.

In level flight at MIL at 10,000ft the P-47 just barely gets up to 318mph IAS (359mph TAS), not leaving much excess horsepower room at 264mph IAS.

So you are correct.  Since we did not use an Area 51 anti-gravity device and are limited to real world physics it will not meet your numbers. Score one for Area 51.

Using the real climb speed of 164mph IAS the average climb rate is around 2400fpm (depending on your flying skills) so the rate of climb is close. But without the Area 51 anti-gravity device how do we make the jump at 2:59min from 16,900ft to 20,000 unless Scottie can beam us up?

But Captain I canna do it,  the warp drive is ready to blow..  

Also, is this climb rate for a narrow cord prop or the later paddle blade?

BEAR - AvHistory

Pg281 America's One Hundred Thousand shows the P47 Speed and Climb Performance.  Speed is in TAS.  I converted to IAS std day.  TAS 10K is 365 mph in the climb.

Bear: climb the 47 to 20k on your schedule and post the airspeed and r/c at 5k increments and time.  See if you can beam yourself to 20k.

The published schedule is optimum and will give the best climb performance.  It is not the schedule used operationally.  Normally the fighters took off in sections and divisions.  Rendevouz then climb with several divisions of 4 each squadron.  Speeds were much less to keep the flight together.

I noted during a prop flight in COF that when the  mixture was accidentally substantially reduced that the engine sound and air speed picked up significantly.  Reduction to engine stumble then to smooth then a few clicks more gave better power than did full rich.

I tried this in the 47 mil power in the climb.  Retard mixture to engine stumble, smooth, plus a few clicks gave best power.  Not the way it should work but helps.

I note that cfg shows 47 with supercharger.  Should be auto and I find no way to key on.  Manifold pressure was steady 53 inches during the climb but only went to 15k.

Interesting thread guys!

My 2c worth, CFS3 over IL2 / FB any time! despite CFS3 running like a dog 8 out of 10 times I try it (The other two times it simply rocks! (?) ) 

I'm puzzled to hear of people having problems with IL2/FB - they've always ran fine for me even in my Celeron 700mhz days....... 

>>>Still poor 47 climb performance.<<<

Most P-47's did not climb well until the D-23

>>>I noted during a prop flight in COF that when the  mixture was accidentally substantially reduced that the engine sound and air speed picked up significantly.  Reduction to engine stumble then to smooth then a few clicks more gave better power than did full rich.

I tried this in the 47 mil power in the climb.  Retard mixture to engine stumble, smooth, plus a few clicks gave best power.  Not the way it should work but helps.<<<

Actually, this is exactly the way it should work in real life & the way it does work in the game.  It the reason our readme says to shut off auto mixture.  

Mathias was trying to tell you that when he said """Nickle, you shure you have autotrim and auto mixture dissabled, checked for keyboard shortcuts on how to trim and set mixture in realtime?"""


>>>USAAF specs 4 min 10k to 20k full fuel and ammo.<<<

That is about 2500FPM or midrange in the P-47 development cycle.

You did not state what P-47 you are flying but the early versions like the C were in the 2100-2200 FPM range & took 7 minutes to get to 15,000 feet and continued to slow.  The contract was for 5 minutes to 15,000 feet but the real planes never made it.

Our P-47D-23 will & does climb at 3117 to 3120FPM @ 165IAS.

Our P-47M will & does climb at 3697 to 3700FPM @ 169IAS.

Our P-47N will & does climb at 2718 to 2770FPM @ 167IAS (the N was a disappointment to the Air Force)

The fact that you by your comments on fuel mixture do not know how to set the engine up for a sustained climb is most likely why you can't make the numbers as the planes themselves will make the numbers. If y'all really need it for proof I can make & post charts from my flights in these planes.

The other thing you need to know is if the planes had the paddle blade props or not as they were worth about 400fpm by themselves.

BTW on the supercharger CFS2/3 does not have any user enabled way to turn it on/off or switch speeds.  We factor that into our equations.  

BEAR - AvHistory

Quote:


sorry, but that's getting silly.
Re-reading my post, I'm almost certain that I used the terms "automixture" and "autotrim".
Yes, confirmed, that's what you can read one side back 

I tested the 47 at 169 mph climb 10k to 20k. Rate of climb was 3000 plus fpm.

I checked on line for another climb speed chart.  Confirmed that 169 mph is ball park.

I reviewed America's Hundred Thousand charts.  The TAS shown are only for Vmax reference.  No climb speeds are shown.

Bear: You are right; my P-47 climb statements were wrong.

Nickle,

No Problem.  

I am glad to see it worked out & you are enjoying the planes.

I had already checked the ATH reference on pg 281 before I saw you last post & the speed listed is the max level flight speed.  

Although it seems counter intuitive, because 165mph is so slow compared to 365mph, as you discovered in your tests you need to climb at the optimum climb speed to get maximum climb rate.

BTW you should be aware that once you take the real life pilots out of the sim pilot pool there are actually very few sim only pilots that are aware of such a thing as "climb speed" being different then top speed. 

Those that do know about it tend to also do very well in online combat.   

Gotta see if I can get the Yak-9M out tonight its a great dogfighter but a little squirrelly low & slow especially with full tanks.

Its the weight;  you get that inertia going and it's over drives the vertical fin, it really needs a fillet like the P-51 and P-47 bubbles.

BEAR

For a really depressing 47 performance chart:

http://www.zenoswarbirdvideos.com/Images/P-47/47TOCL.gif

Note the Climb recommendation a/s and r/c.

The 47C first saw combat Europe in April 43.
47D in process of replacing C models July 43.
Water methanol injection D's begins Nov 43.
Paddle prop install begins D's Dec 43.
Ongoing in April of 44.
Combination gives performance equal to 190 below 15k.

Nov 43 P47 overall kill rate Europe was 3 to 1.
For comparison the F4F vs Japanese was 9 to 1.

May 1944 Maj Gen Kempner states that 47 broke the back of the Luftwaffle.