Yeah ... no.

Mirror-based turret gunnery was very complicated and had all sorts of practical difficulties. In a maneuvering vehicle, motion sickness is profound.

Just shooting with tracers is going to be horribly inaccurate. If you're not looking through a gunsight, the parallax makes it impossible to hit anything. Don't expect enemies to simply "cling to your tail!" You're going to face a lot of deflection shooting; the USN in particular favored deflection shooting over shooting from the six.

One reason to have a rear gunner is so that you can protect your tail while you chase down something else. While this is far from a Zerstörer with autocannon, but A-B-A arrangements in dogfights are pretty common.

If the pilot is using the mirrors, she is not looking at anything in front of her, or around her. Giving up situational awareness is how you die!

Tail stinger MGs in WWII aircraft were entirely useless. (Some were mounted in the nacelles of twin-engine aircraft, but the outcome was the same: wasted weight.)

On Mon, Apr 1, 2019 at 3:21 PM Richard Aiken <xxxxxx@gmail.com> wrote:
On Mon, Apr 1, 2019 at 10:33 AM Thomas RUX <xxxxxx@comcast.net> wrote:

The Nuremberg's Accommodation specification is Crew = 1 (Pilot) while the Offensive specification lists two fixed firing forward light machineguns and two light machineguns in a flexible mount firing rearwards.

I don't see any need for a second crewman. TL 6 is advanced enough to allow for electro-mechanical remote control of those rear guns. Load every third or fourth round as tracer and the pilot can use a mirror to shoot back at anything that tries to cling to his tail. 

--
Richard Aiken

"Never insult anyone by accident."  Robert A. Heinlein
"I studied the Koran a great deal. I came away from that study with the conviction there have been few religions in the world as deadly to men as Muhammed." Alexis de Tocqueville
"We know a little about a lot of things; just enough to make us dangerous." Dean Winchester (fictional monster hunter portrayed by Jensen Ackles)
"It has been my experience that a gun doesn't care who pulls its trigger." Newton Knight (as portrayed by Matthew McConaughey), to a scoffing Confederate tax collector facing the weapons held by Knight's young children and wife.

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