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For an escort mission over Europe, they would use maximum weak mixture most of the time.
For comparison:
Mustang Mk III with V-1650-3:
Cruising Speed (most economical) 20,000 feet: 253 mph
Cruising Speed (max weak mix) 20,000 feet: 395 mph
http://www.wwiiaircraftperformance.org/mustang/mustang-III-ads-3.jpg
Mustang Mk III with V-1650-7:
Cruising Speed (most economical) 20,000 feet: 253 mph
Cruising Speed (max weak mix) 20,000 feet: 405 mph
http://www.wwiiaircraftperformance.org/mustang/mustang-III-ads-7.jpg
F4U-1:
Cruising Speed (most economical) 20,000 feet: 251 mph
Cruising Speed (max weak mix) 20,000 feet: 281 mph
http://www.wwiiaircraftperformance.org/f4u/f4u-1-ads.jpg
F4U-1a:
Cruising Speed (most economical) 20,000 feet: 248 mph
Cruising Speed (max weak mix) 20,000 feet: 278 mph
http://www.wwiiaircraftperformance.org/f4u/f4u-1a-ads.jpg
Corsair IV:
Cruising Speed (most economical) 20,000 feet: 261 mph
Cruising Speed (max weak mix) 20,000 feet: 300 mph
http://www.wwiiaircraftperformance.org/f4u/corsair-IV-ads.jpg
Hellcat I:
Cruising Speed (most economical) 20,000 feet: 232 mph
Cruising Speed (max weak mix) 20,000 feet: 282 mph
http://www.wwiiaircraftperformance.org/f6f/hellcat-I-ads-a.jpg
Hellcat II:
Cruising Speed (most economical) 20,000 feet: 237 mph
Cruising Speed (max weak mix) 20,000 feet: 293 mph
http://www.wwiiaircraftperformance.org/f6f/hellcat-II-ads-a.jpg
Mosquito Mk IV with Merlin 21:
Cruising Speed (most economical) 15,000 feet: 265 mph
Cruising Speed (max weak mix) 15,000 feet: 320 mph
http://www.wwiiaircraftperformance.org/mosquito/Mosquito_MkIV-merlin21_ads.jpg
Mosquito Mk IV with Merlin 23:
Cruising Speed (most economical) 15,000 feet: 265 mph
Cruising Speed (max weak mix) 15,000 feet: 327 mph
http://www.wwiiaircraftperformance.org/mosquito/Mosquito_MkIV_ads.jpg
Mosquito Mk XVI with Merlin 72/73:
Cruising Speed (most economical) 15,000 feet: 245 mph
Cruising Speed (max weak mix) 15,000 feet: 311 mph (321mph after dropping wing bombs)
http://www.wwiiaircraftperformance.org/mosquito/Mosquito_MkXVI_ads.jpg
Well, cruising along at 25000' with drop tank at less than normal power you would move the throttle to combat power, drop the external tank, and dive away since the LW was above you. They knew exactly where you were (radar) and would not attack unless they had the altitude advantage. How long would it take from a medium cruise setting to attack speed? Without diving (straight level acceleration) how long would it take to accellerate from say 250mph to well over 400mph? I don't know exactly, but quite a few precious seconds, maybe 20-30? That's an eternity when the enemy is attacking you.How long would it take an Allied fighter to go from protecting the bomber box speed to attacking an enemy formation speed? It seems some can't comprehend this. I'm sure the Allied fighters were bounced occasionally but not "trolling for sharks, you would be eaten in the first 10 minutes" every time
Sorry Janes is not good enough as a source for you.Jane's is good but it is not a pilot's manual. They are on this site, look them up. Milosh posted a link to one in post #357
ANd again, individual cruise speed is not formation cruise speed.
100 mile radius is far from the German border. It is 137 air miles from Harwich to Rotterdam. And yes that is about what they were rated for in WW II (if not 10-15 miles shorter) but then you forgot the fuel needed to get from 5000ft to 25,000ft. which was roughly another 50 gallons.
I think you are getting confused by the term "Normal power".
"Normal" and "max continuous" are the same. It was supposed to be the maximum power that could be used without a time limit, Not a cruise power.
I would note it was not all roses and chocolate for the defending Germans, after climbing to 25,000 ft or above they were at best climb speed and not anywhere near max level speed or even max level cruise speed and they would need around 2 minutes (4-6 miles?) to accelerate from best climb speed to a high level speed. The American escort fighters were cruising at around 1/2 between best climb speed and full speed.
Well, cruising along at 25000' with drop tank at less than normal power you would move the throttle to combat power, drop the external tank, and dive away since the LW was above you. They knew exactly where you were (radar) and would not attack unless they had the altitude advantage. How long would it take from a medium cruise setting to attack speed? Without diving (straight level acceleration) how long would it take to accellerate from say 250mph to well over 400mph? I don't know exactly, but quite a few precious seconds, maybe 20-30? That's an eternity when the enemy is attacking you.
Sorry Janes is not good enough as a source for you.
I have stated numerous times that max continuous and normal HP are the same.
I didn't forget the fuel needed to get from 5000' to 25000'. The purpose of the reserve for TO and climb to 5000' is so the pilot could more easily compute range. Climb from 5000' to 25000' would take approximately 10-15 minutes and while you are climbing you are also headed in the direction of your mission. Climb speed and minimum cruise speed are very similar, around 170mph. 10 minutes climbing at 170mph is only 28 miles, hardly significant in a 500mi mission, and remember you should be climbing in the direction of your target.
So, if you are flying at 25000' with drop tanks and you are bounced from above you kept your tanks and turned into your attacker?I've read a lot of encounter reports, not nearly as many as drgondog but quite a few. I don't ever recall seeing any where P-51's dropped externals and dove away... ever. They universally turned into the attacker, diving away is a good way to end up in a Luft Stalag, or worse.
Escorts were typically at varying altitudes and at high cruise speed scissoring over the bomber stream, about every 45 minutes or so they'd throttle up to keep the plugs from fouling, then return to cruise settings.
Mustangs also typically cruised fast so that the work up to engagement speeds was only seconds, geez, drgondog has gone over this a zillion times and still there's questions?
You have obviously seen the charts, post them yourself. Thread is about the Hellcat and Corsair in Europe. You brought up the P-39, so I included a little comparison for you.And just so this thread doesn't get black balled, I will accept the idea that max continuous power can be construed as "cruise" by some and still be correct. Maybe you could tell me then why in other cruise "conditions" (lower power settings) there is no data for the P-39 above 20k feet in the operational charts?
I'm serious here, I want to learn something new.
I've read a lot of encounter reports, not nearly as many as drgondog but quite a few. I don't ever recall seeing any where P-51's dropped externals and dove away... ever. They universally turned into the attacker, diving away is a good way to end up in a Luft Stalag, or worse.
Escorts were typically at varying altitudes and at high cruise speed scissoring over the bomber stream, about every 45 minutes or so they'd throttle up to keep the plugs from fouling, then return to cruise settings.
Mustangs also typically cruised fast so that the work up to engagement speeds was only seconds, geez, drgondog has gone over this a zillion times and still there's questions?
So, if you are flying at 25000' with drop tanks and you are bounced from above you kept your tanks and turned into your attacker?
Yes, turning into your attacker was policy and a good one, but not when every variable was against you (drop tanks, lower speed, attacked from above). Your attacker is diving at say 500mph and you are cruising at say 320mph? And you keep your tanks and engage by turning into him? You're about to become an easy victory claim.
Say you are going 350mph, how many seconds does it take to get to top speed over 400mph? Many precious seconds, probably at least 10 while the LW is diving on you.
Pete,There is a tremendous amount of high quality information on here that has been culled for those people (pretty much all of us) who are looking for a little more than what the average book has to offer. Unfortunately a new guy doesn't absorb it all as quickly as we would like and sometimes attitudes, preconceived notions need time to be worked through. Drgondog/ Bill is exceptionally good at answering aLOT of these mission specifics so hopefully he will chime in.
Cheers,
Biff
Pardon me, guess I read your post wrong, you said there were no encounter reports where Mustangs dropped their tanks and dove away, ever. I took that to mean they kept their tanks.No Mr. P-39 Wizard, you don't keep your tanks, perhaps you didn't read it correctly so slower...
Never read where Mustangs got bounced and dove a way, they dropped tanks and turned into the attacker, fighter tactics 101.
Why do you insist that Mustangs were always bounced from above at over 500MPH? Many encounter reports, if you could be bothered to read them, have P-51s sighting and attacking LW A/C below them.
You also seem to think that the Germans knew exactly where the escorts were every time and then positioned themselves perfectly to bounce them from above.
Pardon me, guess I read your post wrong, you said there were no encounter reports where Mustangs dropped their tanks and dove away, ever. I took that to mean they kept their tanks.
Amazing that no Mustangs ever dove away to escape an adversary who was above them or otherwise held the advantage. Seems odd.
How did you get from me that Mustangs were ALWAYS bounced from above? But then again, hard to bounce someone from below.
But honestly, the LW DID know exactly where the bombers and their escort were, they were on radar. Radar gave direction, altitude and speed. LW fighters had the advantage in that they knew where (and how high) you were flying, so they had the option of engaging when they were in an advantageous position above. If they didn't have time to get above, then they probably didn't attack.
You have obviously seen the charts, post them yourself. Thread is about the Hellcat and Corsair in Europe. You brought up the P-39, so I included a little comparison for you.View attachment 503103
Amazing that no Mustangs ever dove away to escape an adversary who was above them or otherwise held the advantage. Seems odd.