Author Topic: BFF-109K4 or Yak-9U (Read 737 times)

Nimrod45 · « **on:** July 19, 2007, 07:51:14 PM »

The Yak seems like the better dog fighter and the 109 has more battle feild endurence and versatility, can't decide which one to devote my time to. Just looking for a little insight.

Krusty · « **Reply #1 on:** July 19, 2007, 07:59:05 PM »

K-4 will probably eat a yak9u for dinner most days of the week. Once the yak loses speed, it loses its best advantage: The "first-generation flight model that's probably full of bugs but lets the yak9u keep speed forever after a dive."

Given a choice, I'd take the 109. Both are capable, if you learn to fly each the right way, I guess.

Fianna · « **Reply #2 on:** July 19, 2007, 09:48:20 PM »

109, unless there's something about the yak that really interests you.

Nilsen · « **Reply #3 on:** July 20, 2007, 05:26:05 AM »

K4 for me. Never liked the yak

RAIDER14 · « **Reply #4 on:** July 20, 2007, 05:28:24 AM »

109K4 catches any plane that tries to run:aok

Widewing · « **Reply #5 on:** July 20, 2007, 09:14:09 AM »

Quote

Originally posted by RAIDER14
109K4 catches any plane that tries to run:aok

That depends upon altitude.

For example: a P-51D is tangling with several enemy fighters at 5k. He runs out of ammo but hasn't used his WEP yet. There's still a Co-e, Co-alt 109K-4 about 2,000 yards distant.

The P-51 pilot does a split-S and dives towards the deck, heading to the nearest friendly airfield. The 109K-4 follows.

That 109K-4 will NEVER catch the Mustang. In fact, the Mustang will be out of icon range in 5 minutes, just a dot on the horizon.

"Now wait a minute," you argue, "The 109K-4 is just as fast as the P-51D is on the deck and has 10 minutes of WEP!"

This is all true, but it still has no chance to catch the Mustang.

Why is that, you wonder?

Simple really. The 109K-4 decelerates to its max sustained level speed much faster than the P-51D. In short, the much cleaner, lower drag P-51 bleeds speed slower than the 109K-4.

This has been tested. Diving to the deck, speed 450 mph TAS, speed after 30 seconds at max power (WEP).

P-51D: 404 mph
109K-4: 397 mph
P-47N: 399 mph
Typhoon: 400 mph
F4U-4: 403 mph
190D-9: 407 mph
Tempest: 411 mph

Time to bleed down from 450 mph TAS to 376 mph TAS (190D-9 benchmark).

P-51D: 1:30.15
109K-4: 1:10.16
P-47N: 1:12.91
Typhoon: 1:33.94
F4U-4: 2:39.62
190D-9: 2:56.83
Tempest: Never slows below 387 mph....

So, the blazing fast 109K-4 loses ground to every one of the above. It can only begin to close in on them after 5 minutes of chasing, except the Dora, which out-runs the 109K with ease at sea level.

If I may stray off topic a bit...

I'm hoping that HTC someday offers 150 octane for the P-51s, perked to say 15 points. A P-51 pulling 75" of MAP is a monster... Climbs nearly as well as the 109K-4 (4,475 fpm at sea level), and shows near Tempest speed on the deck (383 mph).

Moreover, I also hope HTC takes a look at what the last drag model changes did to the P-51's flap drag, which increased to the point that the turn rate and radius are porked beyond recognition compared to earlier versions of AH2.

My regards,

Widewing

Viking · « **Reply #6 on:** July 20, 2007, 09:28:53 AM »

Quote

Originally posted by Widewing
The P-51 pilot does a split-S and dives towards the deck, heading to the nearest friendly airfield. The 109K-4 follows.

That 109K-4 will NEVER catch the Mustang. In fact, the Mustang will be out of icon range in 5 minutes, just a dot on the horizon.

That is why a 109K should never dive under 5k when chasing a P-51. I always level out above 5k, this actually allows me to close the horizontal gap while creating a vertical gap. The Ponies invariably always dives for the deck. At 5k the 109K does 400+ mph and will easily overtake the P-51 in 5 minutes or so. THEN I dive the final 5k and watch the P-51 do its flap-flop dance before it dies.

Krusty · « **Reply #7 on:** July 20, 2007, 09:33:31 AM »

Viking beat me to it! I was going to type the exact same thing!

Although looking at the power curves, it might be 4k, 5k, or something in between. That general area is all good.

EDIT: I retract that. I was thinking of a different plane. You're right, it's 5k (and higher).

TUXC · « **Reply #8 on:** July 20, 2007, 11:40:27 AM »

Quote

Originally posted by Widewing

I'm hoping that HTC someday offers 150 octane for the P-51s, perked to say 15 points. A P-51 pulling 75" of MAP is a monster... Climbs nearly as well as the 109K-4 (4,475 fpm at sea level), and shows near Tempest speed on the deck (383 mph).

Widewing, just out of curiosity do you know offhand which version of the P-51 that data is for (P-51D or P-51B/Mustang III) and which engine it is fitted with (V-1650-3 or V-1650-7)? I'm sure the data is on the spitfireperformance page, but I won't have time to check until later. Thanks.

Widewing · « **Reply #9 on:** July 20, 2007, 03:46:16 PM »

Quote

Originally posted by TUXC
Widewing, just out of curiosity do you know offhand which version of the P-51 that data is for (P-51D or P-51B/Mustang III) and which engine it is fitted with (V-1650-3 or V-1650-7)? I'm sure the data is on the spitfireperformance page, but I won't have time to check until later. Thanks.

P-51B fitted with the V-1650-7 (same engine as P-51D).

My regards,

Widewing

PanzerIV · « **Reply #10 on:** July 21, 2007, 04:03:12 AM »

Yak9U has great visibility, must be uncomfortable though, unless Russians liked sitting in glass chairs!

Ace8765 · « **Reply #11 on:** July 21, 2007, 07:56:00 AM »

109, unless you love the yak's climbing ability at low speeds

nickf620 · « **Reply #12 on:** July 22, 2007, 02:02:02 PM »

109 all the way

yaks suck (no offense yak fans just my personel opinion)