What if America built De Havilland Mosquitoes instead of the B-17 Flying Fortress?

Ad: This forum contains affiliate links to products on Amazon and eBay. More information in Terms and rules

Status
Not open for further replies.
I forgot to add "at high altitude".

High altitude was used for defensive purposes. To keep away from flak as much as possible.

I think the nuance here is, not to 'gloss over' anything, is that while in 1940 area bombing might have been their only choice for a Strategic offensive, at some point in the mid war the Mossie was giving them some other options.
 

This is actually quite similar to how the DAF (etc.) changed their tactics in mid 1942 to defeat the Luftwaffe. They started hitting all the Axis basis, which required the Luftwaffe and Regia Aeronautica fighters to takeoff and attack them from below, while light, medium and heavy bombers (notably B-24s) were bombing the crap out of their airbase. This worked.

This approach was also extended to operational (supply, communications) targets well beyond air assets, though there weren't really Strategic targets in North Africa in the sense that the Afrika Korps didn't have factories there. When they went across to Sicily and then Italy it was kind of a hybrid, as the Italians did have factories, but using a lot of the same combinations of tactics.

One thing they did in the Med was sending in bombers at low / medium altitude to hit a 'box' target, heavily escorted by fighters. This was kind of a middle ground between low altitude precision strikes and area bombing. The big bombers were used that way too sometimes in NW Europe.
 

Exactly!

And the specific role of high altitude area bombing was not necessarily required by technical limitations for the entire war.
 
That depends on your definition of 'Strategic bombing' per above.

The definition is not up for debate, you want the Mosquito to replace the B-17, its role was strategic bombing. Let's not cloud the issue.

And I've explained to you but you ignored it - what I am actually pointing out is that the notion that "volume of bombs on target" is an erroneous one. Most of the bombs dropped at night or from high altitude were not hitting the targets.

The value of bombs on the target can be no more guaranteed by the Mosquito than the B-17; your presumption that the Mosquito offered better accuracy as a level bomber is the fallacy here. In terms of the mid 40s definition of accuracy, the most accurate raids were those where sophisticated nav and bombing aids equipping the bombers.

My point is that using the Mosquito is not going to guarantee any greater degree of accuracy, nor less collateral damage, nor a lower loss of civilians. I mean, if you are worried about this, don't do bombing. Sure, hypothetically the Mosquito might be able to kill less civilians, but can you guarantee that if you are using the Mosquito to replace the B-17 in your overall aim in achieving victory? Not only that, but how many is too many dead civilians? How few is an acceptable number? Just because 50 are killed instead of 100 using Mosquitoes, is that any better?

The bottom line is that using Mosquitoes is not going to save civilian lives any more than using any other type of bomber in the 1940s, and it will take longer and involve more aeroplanes to do the same job of destroying vital military targets.

B-17s were not used in a vacuum, they were backed up by B-24s and the RAF night bombers, as well as medium bombers, such at Bostons, Mitchells, Marauders etc, so it was a combination of effort and substituting B-17s for Mosquitoes is certainly not going to produce any real measurable difference in results unless you get rid of every medium or heavy/tactical or strategic bomber.

The Mosquito would not be used as, nor considered a, heavy bomber. It could, however, be a strategic bomber.

Thanks for stating the obvious, I might have come to that conclusion some time earlier, but if you are going to replace your B-17s with Mosquitoes, you are wanting the Mosquito to be what the B-17 was, correct? So, what was the B-17? A heavy bomber that does the job of a heavy bomber, strategic or otherwise. This is what the thread is contesting. If you want a heavy bomber, don't replace the one you already have with a Mosquito.

What is the statistic for volume of bombs on target vs volume of bombs dropped? It was not good.

Aaand the point is that it makes some difference between a B-17 and a Mosquito when they are destroying the same target in the strategic bombing role since the B-17 can carry more bombs than a Mosquito, regardless of tonnage required over the target. A factory cannot be destroyed by a low level sweep by FB.VIs like Operation Carthage, and this is where the Mosquito's famed "precision attacks" comes from, not attempting to blast a factory out of existence. To do that, you ideally need big bombers with lots of bombs. This also helps with the fact that you need lots of bombers with lots of bombs because if you are demonstrating poor overall accuracy, the odds of a hit are increased with more bombs dropped by more bombers.
 
With Kenney there were a whole bunch of different factors.

Factors included not a lot of civilians.
There was also not much in the way of industry. Like about zero aircraft factories or engine factories or any other industries.
Japanese also had truly dismal low attitude AA guns. Both in quantities and qualities.
For instance the Japanese had NO 37-40mm AA guns except perhaps for a captured weapons at this point in time.
The US bomber forces only had to with a a limited amount of Japanese AA (Yes more than one one air strip or few other installations.)

But let's go back to Operation Oyster. Which is closer to blowing up industrial sites than most of the other missions.

It took 3 tries for the British just to get mock-up attacks to get things to where they wanted them, They also stopped using a couple of Mitchel squadrons as the Mitchel squadrons were not yet up the standard of training needed.

So it took from Nov 17 1942 to Dec 6th 1942 to do the training and preparation of the raid. Perhaps crappy weather was some of the delay?
The Ventura bombers were supposed to drop their bombs at 6 minutes. The Ventura's used 40 30lb incendiary bombs and two 250lb HE bombs with 30-60 minute time delay fuses to screw up firefighting efforts.
Here was one photo.


It turned out that the large numbers of bombers spread out by even a few minutes wound up be binding the smoke and bombs were not as accurate as hoped. Several bombers
hit houses because they could only see smoke.

Also don't confuse the later follow up strike with a full strike.



Factory in the mid 1930s.

The British squadrons under fire (not all the times) at times over 50 miles away.


Now lets see how well it a Mosquito raid might have gone against Essen, over 60-70 miles further each way than the Phillips factory.

More AA, more FW 190s.
 
The definition is not up for debate, you want the Mosquito to replace the B-17, its role was strategic bombing. Let's not cloud the issue.

I think those clouds have already parted. Strategic bombing doesn't mean high altitude level bombing or area bombing. You are conflating the two. Strategic means the type of target not how you try to hit it.
The value of bombs on the target can be no more guaranteed by the Mosquito than the B-17; your presumption that the Mosquito offered better accuracy as a level bomber is the fallacy here.

No, you are once again arguing against something I didn't say. I think that low altitude bombing is inherently more accurate than high altitude bombing. I think that is a demonstrable fact. The difference between the Mosquito and the B-17 or Lancaster is that the Mosquito can fly in, low or high, including without escorts, then fly down to drop it's bombs accurately, and fly out again. It doesn't have to lumber by at 30,000 ft and it also doesn't necessarily have to bomb at night.

In terms of the mid 40s definition of accuracy, the most accurate raids were those where sophisticated nav and bombing aids equipping the bombers.
I don't think the data bears that out

This is another straw man, because I didn't say that civilian casualties were unacceptable. I said the goal of attacking the civilians because you can't hit the factories was a mistake, and fewer civilian casualties is a benign side-benefit of more accurate bombing.

I think the Mosquito was potentially much more accurate. I do not have your faith in high altitude bombing.

Thanks for stating the obvious, I might have come to that conclusion some time earlier, but if you are going to replace your B-17s with Mosquitoes, you are wanting the Mosquito to be what the B-17 was, correct?
Incorrect

So, what was the B-17? A heavy bomber that does the job of a heavy bomber, strategic or otherwise. This is what the thread is contesting. If you want a heavy bomber, don't replace the one you already have with a Mosquito.
I don't want a heavy bomber, I want a fast, accurate bomber. In other words, a Mosquito. Or rather, to be more precise, I want much fewer heavy bombers and more Mosquitos. Strategic bombing <> heavy high altitude area bombing


I disagree. I think low level bombing can do it, and is the only way to do it in many cases. Even very costly raids like Ploesti had to be done at low level in order to deal sufficient damage to the target.
 

I gather that the Einhoven raid was one of the first strikes using Mosquito bombers. Can anyone confirm that?

Let me pose you a question SR6. Imagine if instead of 10 Mosquitos and 70 Bostons + Venturas, you just had 80 Mosquitos. Do you see more or less aircraft lost on the raid? More or less accurate bombing (assuming they can all fly in basically at the same time rather than trying to coordinate with two other types of much slower planes).

And do you really think 80 Mosquitos couldn't wreck that factory you are showing here? I think if you put 5 bombers on each of the big buildings coming in at low level, you could do a hell of a lot of damage.

Now lets imagine if they tried to do this with Lancasters. How many sorties would it take to actually disable the factory for six months like they did to the Phillips plant?
 
Best description ever. As good as: cockpit access difficult should be made impossible.

Great saying. Was meant for a different thread, but anyhoo!

Strategic bombing doesn't mean high altitude level bombing or area bombing. You are conflating the two.

No, I'm not. As mentioned earlier, the thread wants a substitution of B-17s for Mosquitoes, so that defines how you are going to use your Mosquitoes if you have them instead of B-17s, surely.


Depends on what you want to do with it, was it more accurate than a B-17 attacking a factory from medium to high altitude? Nope. Was it more accurate than a B-17 at destroying a prison wall at low level, yup.

I said the goal of attacking the civilians because you can't hit the factories was a mistake, and fewer civilian casualties is a benign side-benefit of more accurate bombing.

Just change your bombing policy, then! Just state that you won't carry out bombing of civilians in cities! Don't exchange your B-17s for Mosquitoes to avoid killing civilians! Easy!

I think the Mosquito was potentially much more accurate.

See above. Depends on what you are doing with it.

Incorrect

No, not incorrect. The thread is about substituting B-17s for Mosquitoes.

Or rather, to be more precise, I want much fewer heavy bombers and more Mosquitos.

But what do you want those Mosquitoes to do exactly? If you want less heavy bombers, what are you wanting to do with them and do you think you are going to achieve the same results that if you had a lot more heavy bombers? And the Mosquito? Again, what do you want them for? Because more Mosquitoes means more Mosquitoes for Fighter Command as night fighters and fighter bombers, Coastal Command as anti-shipping strike, and as PR machines. This is a better use of more Mosquitoes, not substituting them for existing heavy bombers.

I think low level bombing can do it, and is the only way to do it in many cases. Even very costly raids like Ploesti had to be done at low level in order to deal sufficient damage to the target.

Again, it depends on the target and what low level means in the context of what you are trying to do. In this thread you are suggesting that replacing B-17s with Mosquitoes will produce greater accuracy at low level, what if you can't bomb at low level? Not every job requires low level bombing, so what are you going to do? What if there is no difference in what a B-17 produces results wise compared to a Mosquito? Then what?
 
Last edited:
Great saying. Was meant for a different thread, but anyhoo!



No, I'm not. As mentioned earlier, the thread wants a substitution of B-17s for Mosquitoes,

That's it, full stop.

I don't think there would be any discussion if it was about replacing B-17s with Mosquitos to do the job exactly the same way.

This part:

so that defines how you are going to use your Mosquitoes if you have them instead of B-17s, surely.

That's all you. That is your assumption. When I was in the military they warned us about making assumptions.
 
That's it, full stop.

I don't think there would be any discussion if it was about replacing B-17s with Mosquitos to do the job exactly the same way.

That's precisely what this thread is about. Why do it then? What's the point of even supporting the notion if you are not going to do exactly that? There were different aircraft for different operational profiles. If you wish to fly a low level profile, then send the Mosquitoes, but you won't be able to fly every operation using the same profile. What if you need a large tonnage of bombs to destroy a large area, surely a low level profile is not going to cut it.

Yes, build more Mosquitoes, but don't get rid of your heavy bombers to do so. You are restricting your options unless you are going to use the Mosquitoes for exactly the same operational profile as the bomber you intend on replacing it with, in this case, the B-17.

That's all you. That is your assumption. When I was in the military they warned us about making assumptions.

Nope, it's not all me and it's not an assumption, it's written in the title of the thread! It's what multiple members of the forum have been discussing for the last 49 pages!
 
Last edited:
How is a Mosquito any more accurate than a Boston, or any other medium bomber?

If it were pushed any higher on it's current pedestal, it'll end up with black crosses...

Timing was an issue with Operation Oyster. The Mosquitoes left later but caught up with the Bostons, meaning they had to slow down on the run into the target.
 
It only defines using Mosquitoes against German industry, not what tactics and bombs they would use.

Well, apply a bit of logic and the rest falls into place.

Again, as mentioned, different mission profiles called for different responses. The B-17 didn't operate in a vacuum and replacing it with Mosquitoes removes the total number of bombers that can carry out particular mission profiles. The strategic bombing campaign wasn't just US four-engined bombers by day from high altitude and RAF four-engined night bombers bombing civilians, there were different operations against different targets at different altitudes and for different reasons. The Lancasters that sank the Tirpitz were still Bomber Command heavy bombers carrying out a strategic mission profile, for example. As I asked earlier, what if you can't carry out your bombing raid at low altitude? What if your mission parameters require a different response to what the Mosquito can provide?

Yes to building more Mosquitoes, no to building them in place of building B-17s.
 
It only defines using Mosquitoes against German industry, not what tactics and bombs they would use.

I really don't grasp why this is so difficult to understand. And we aren't saying for sure that the Mosquito could do it, or at least I'm not, I'm just having the discussion about whether it could. At no point was I ever in this thread trying to suggest that the Mosquito should be used to drop bombs from 25,000 feet.
 

When the B-17 was carrying more bombs it was often 500lb and smaller. 500lb was the typical bomb size used in Mosquitoes pre-1944 and the bulged bomb bay door.

As I said above, only 80 bombs in the August 17, 1943 raid on Schweinfurt hot factories, yet caused significant damage. And they weren't all big bombs.



Note that they used British 250lb Incendiary Bombs.

Low level attacks were pioneered by B.IV Mosquitoes in 1942 and 1943. Before the FB.VI was in service.

And even later in the war, 627 Squadron raided the Gestapo Headquarters in Oslo.





and because of smoke of earlier bomb runs the second wave could not identify the target:



They were using a mix of B.IV and B.XX (Canadian built B.IV).

Of interest is that some carried 2 x 1,000lb GP bombs and some 2 x 1,000lb MC. The former weren't much better than 2 x 500lb MC.
 
Well, apply a bit of logic and the rest falls into place.
No they don't. That's just you.

Again, I specifically said don't eliminate the heavy bombers. There is a lot of mileage between building 12,000 B-17s (and all the rest of the heavies) vs. none. I never said none.

And the industrial question has only partly been explored. But I think Mosquitos probably could have done the job better.
 
How is a Mosquito any more accurate than a Boston, or any other medium bomber?

I never said it was a more accurate bomber than a Boston - I haven't really looked into that. (Boston is usually considered a light bomber)

But for the record, I'm not suggesting that a Mosquito was more accurate than any other bomber or fighter-bomber that could attack at low level. I think low-level bombing was more accurate than high altitude bombing.

The difference between a Boston and a Mosquito is that a Mosquito could outrun a Fw 190 on the deck (see the Eindoven raid) and the Boston definitely couldn't. The Mosquito also had a cruise speed up in the high 300s while the Boston was cruising slow enough to be intercepted.

The Boston was an outstanding bomber when it came out, I think it was one of the best designs of War on either side the for the niche it was in, and it was still pretty good in late 1942, but it definitely couldn't contend with German fighters on it's own, it also didn't have the range of the Mosquito. It couldn't carry a 4,000 bomb either. The Boston was good, but the Mossie was a better plane.

If it were pushed any higher on it's current pedestal, it'll end up with black crosses...

I don't think I'm putting it on a pedestal, I'm just extrapolating from the very real capabilities and limitations we know it had, and asking if more could have been done with it.
 
Last edited:
I really don't grasp why this is so difficult to understand.

I do understand what you are trying to get across, Schweik, it's just that I don't agree that building Mosquitoes instead of B-17s is the best way of doing it. There is no guarantee that the reasons you state the Mosquito was better than the B-17 actually could produce equal results. If that isn't the case, then why get rid of the B-17?

Not every mission profile can be flown at high speed and low altitude. Sure, build more Mosquitoes, but don't replace your heavy bombers with them. Give those Mosquitoes to Commands that need them. If you want better heavy bombers that are more accurate and to avoid collateral damage, change the design of heavy bomber. Get rid of gun turrets, give them more powerful engines to carry greater loads across greater distances at greater speeds, and have some really big bombers to carry those really big bombs that you often might need for difficult to destroy targets like bunkers and viaducts and give them accurate navigation and bombing aids etc.

Wait...

MoF 159

And they even changed them from a high to low altitude role midway through their career...
 
Status
Not open for further replies.

Users who are viewing this thread