Author Topic: Was having a tail gunner really that effective?  (Read 6852 times)

Offline Mister Fork

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Was having a tail gunner really that effective?
« on: November 17, 2014, 05:16:24 PM »
While having a debate with a close friend and also a WW2 historian, we were talking about the operation performance disappointment of the Bf-110 series aircraft and what were it's actual downfalls.  We were wondering if training was the root cause - not taking advantage of it's performance.  Then we looked at it performance data... We also got out my Weapons and Warfare book on the Bf-110 how it was performance wise after the BoB it was a sitting duck for the more nimble and faster Spitfire V/IX and the introduction of American aircraft P-47 and early P-38's.  We noted the Mosquito as a fast attack aircraft with no gunners in the rear using its speed solely as its saving grace - speed was key to it's survival as a fast-in-out attack aircraft.

Even with the improved engines, the Bf-110 performance lagged but one thing that my friend came up was the weight of the tail gunner, its ammo, gunner support systems including oxygen, longer cockpit frame, seats, armor for rear gunner, and how much all that extra protection was really needed in a 300+ MPH attack aircraft?

So a couple of questions came up - how much faster would the Bf-110 be if the cockpit was greatly shortened, ammo, chair, comms, oxygen system reduced, and its AA guns deleted and how much more nimble would it be?
The hardest part was figuring out how much all that extra weight to support the rear gunner actually took.  The AA mount, the actual seat and frame, reduced cockpit size.  Delete of the internal comms system. Reduction of the O2 support system (not much but it also means you only need half the O2. The Bf-110 has an empty weight was 4500kg (9900 in lbs) and it also means that reducing the support systems is a complete guess as the airframe would need additional support to hold the rear guns and gunner.

And we listed the weights of the gunner delete:
100kg (220)- Tail gunner
13kg (30) - two MG-81Z's
240kg (530) - standard ammo count for MG-81Z in Bf-110 at 12g per 7.92mm bullet at 12g each.
100kg (220) - supporting framework for MG's
400kg (880) - rear seat and AA support systems delete

Total reduction of weight would be almost a 20% lighter aircraft.    :confused:

And an further conversation occurred about modelling those changes in a simulator (FS:X) to see what kind of changes would it have on the Bf-110.  Of course, CoG is a big impact as it moves a lot more weight forward from the nose guns, but I'm sure some fuel tank adjustments could of been made by putting a self-sealing fuel tank there in that spot, further extending the range.

Questions:

1. Our estimate was around Was our weight estimates accurate for the gunner delete was around 850kg or ~1850lbs...is that accurate or 'close enough'?  :rolleyes:
2. Operationally, the Bf-110C-4 flew at around 12-13000lbs loaded with max ammo fuel and bombs.  So how much difference does 1800lbs mean on a plane that flies for combat at 12500lbs? Not much, but once it does its job, what kind of fighter would 1800lbs make?  
3. If the Bf-110 was a single seat attack aircraft with the weight reductions, how effective would it have been?
4. Considering the potential performance gains of removing the rear gunner, why was the BF-110 equipped with one?
5. Finally - how truly effective was a fast-moving aircraft with a tail gunner?
« Last Edit: November 17, 2014, 05:19:36 PM by Mister Fork »
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Offline morfiend

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Re: Was having a tail gunner really that effective?
« Reply #1 on: November 17, 2014, 06:39:51 PM »
Fork,

reshaped
  while I'm not prepared to speculate on what if but it might help if you looked at the 410 line!

   They did exactly what you are talking about,removed rear gunner and guns,reshaped the cockpit framework and naturally this reduced the weights.

  IIRC there was somewhat of a speed advantage and surely the wingloading would be lower but I'm afraid it was a case of too little too late.


   DH also did a similar thing with the mossie,only they called it the hornet!

  They basically turned the mossie into a single-seater,but they also revamped construction in both materials and technique.One thing they changed that I know of for sure was the use of laminated wood and aluminum,sort of a composite!  Of course the Hornet used different engines than most Mossie's so performance figures wont help you but you could also look at weights to give you another prospective of weight savings in doing as you proposed,turning the 110 into a single-seater.


   If you could get a G model close to the B/C's weight I would suspect you would have a fairly well balanced twin engine fighter,now if they only would have adopted the handed engines it might even have been close to P38 performance.    There I go speculating..... damn you fork!!!!! :rofl



     :salute


 

Offline Arlo

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Re: Was having a tail gunner really that effective?
« Reply #2 on: November 17, 2014, 08:50:10 PM »
  while I'm not prepared to speculate on what if but it might help if you looked at the 410 line!

Essentially what I was thinking, as well.  :)

Offline Oldman731

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Re: Was having a tail gunner really that effective?
« Reply #3 on: November 17, 2014, 09:05:24 PM »
  looked at the 410 line!

   They did exactly what you are talking about,removed rear gunner and guns


....er......

- oldman

Offline morfiend

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Re: Was having a tail gunner really that effective?
« Reply #4 on: November 18, 2014, 05:17:03 PM »

....er......

- oldman


  Not sure what this was meant to say but if you read up on the 410 you will see they modified 40 to 50 airframes. The rear guns were removed and the gunners seat and position was faired over.

   I'm pretty sure M00t posted a couple of pix of these machines in the old 410 thread. If I was all techie and such I could post some pix from one of the several references I have,but that way above my pay grade..... :devil




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Offline Mister Fork

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Re: Was having a tail gunner really that effective?
« Reply #5 on: November 18, 2014, 07:31:02 PM »
Yes, but even the Me410 has a tail gunner.
Fork,

reshaped
  while I'm not prepared to speculate on what if but it might help if you looked at the 410 line!
Even the Me-410 had a tail gunner.  What was their fixation with tail gunners for attack aircraft?
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Offline pembquist

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Pies not kicks.

Offline kvuo75

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Re: Was having a tail gunner really that effective?
« Reply #7 on: November 18, 2014, 09:10:40 PM »

1. Our estimate was around Was our weight estimates accurate for the gunner delete was around 850kg or ~1850lbs...is that accurate or 'close enough'?  :rolleyes:

that's my first question.. seems a bit much.. you have 400kg as just the seat?


an entire empty Cessna 152 is 490kg. it has 2 seats :)

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Offline Oldman731

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Re: Was having a tail gunner really that effective?
« Reply #8 on: November 18, 2014, 09:16:04 PM »
Not sure what this was meant to say but if you read up on the 410 you will see they modified 40 to 50 airframes. The rear guns were removed and the gunners seat and position was faired over.


Didn't know that.  Ignorant oldman!

The better follow-up question is:  How did the modified 410s do?

- oldman

Offline Charge

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Re: Was having a tail gunner really that effective?
« Reply #9 on: November 19, 2014, 06:53:59 AM »
The 410s without tailgunners were meant for high altitude work and they had GM-1 systems installed with a huge GM tank in place of tail gunner. The requirement came from misunderstanding in LW high command that 410 was not capable of high speed, high alt missions, but from front line units came reports that regular 410s were doing those missions just fine so there was no requirement for specialized aircraft variant. The performance boost from GM-1 was probably quite significant but still the squadrons rather kept their tail gunners so I guess the tail gunner was valued more than extra speed and altitude.

http://www.airpages.ru/eng/lw/me410.shtml

Considering the 110 the early configuration of one MG15 was a waste of room and weight IMO but the later MG81Z was much better with its hugely increased RoF. 110s were really not used in day fighter role later in the war, AFAIK, but the requirement for Defense of the Reich operations required also the night fighter squadrons to participate in attacking bombers. This was of course sheer lunacy since the NF 110s were hampered by their NF equipment so the losses were certain to happen. The survivability of German twins was made worse by making them carry Wgr21s (the same false idea also behind the use of Bk5) in combat which made then even more slow and unresponsive and easy meat for escorting fighters and it also gave the bomber tail gunners more time to shoot at them while the weapon effect was not usually worth all the negative effects that came with it.
 
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Offline bozon

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Re: Was having a tail gunner really that effective?
« Reply #10 on: November 19, 2014, 10:31:13 AM »
Tail gunners can only be effective in a non maneuvering plane. This means heavy bombers or night fighters (defending against enemy night fighters). On dive bombers I suppose the purpose was to try and prevent the bomber from ditching the bomb in order to defend itself by maneuvering (and aborting the mission).

In the case of the 110/410 I think that this was simply conservative thinking. Many missions benefit from a second crewman and the tendency is to let that other guy contribute by peppering away with a tiny gun. This however was counter productive. The Brits realized it early and in the mosquito the second crewman does not operate a gun (and faces forwards against early recommendation). In the Beaufighter the observer also gave up his gun when they realized that it was useless for the Beau missions.
« Last Edit: November 19, 2014, 10:33:21 AM by bozon »
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Offline Zimme83

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Re: Was having a tail gunner really that effective?
« Reply #11 on: November 19, 2014, 11:56:57 AM »
Well, WW2 wasn't like AH. Most guys got kill from close range by a con at their dead 6 that they never saw. a guy looking rearward increased survivability significantly, not primarily with his gun but with his eyes. At least for planes like 110 an IL-2. Heavy bombers is a different thing.
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Offline Charge

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Re: Was having a tail gunner really that effective?
« Reply #12 on: November 19, 2014, 12:29:28 PM »
As in Lancasters also in 110s and Ju87s (that I know of) the tail gunner gave the initial warning of the danger and coordinated timing of evasive actions so he was considered "worth his weight" in the plane, whether or not he had a gun. Maybe that explains why the Beaufighters had the GIB too, even if he did not have a gun.

I recall there were some early bombers where the tailgunner did not have comms to pilot so he only had his gun so he could do at least something for his survival.

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Offline Mister Fork

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Re: Was having a tail gunner really that effective?
« Reply #13 on: November 19, 2014, 03:05:14 PM »
As in Lancasters also in 110s and Ju87s (that I know of) the tail gunner gave the initial warning of the danger and coordinated timing of evasive actions so he was considered "worth his weight" in the plane, whether or not he had a gun. Maybe that explains why the Beaufighters had the GIB too, even if he did not have a gun.

I recall there were some early bombers where the tailgunner did not have comms to pilot so he only had his gun so he could do at least something for his survival.

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The rear-view mirror most fighters did the same thing no? 
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Offline Serenity

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Re: Was having a tail gunner really that effective?
« Reply #14 on: November 19, 2014, 03:10:29 PM »
The rear-view mirror most fighters did the same thing no? 

How well can you spot a small fast moving object the size of your vehicle 1000 yards behind you from your rear view mirror?