Ju 288G

Insane. 

Do you have a link to an article or picture? I am very curious to see how they did that.

SG 116
The special unit 116, SG 116 short was a developed from mid-1944 German special weapon for installation in light, single-seat fighter aircraft .

After the success of the " Weird Music " in German night fighters, the German Air Force was looking for ways to extend the principle to the tank hunt. Since the air rule at that time was already in the hands of the Allies, only fighters came for this type of air defense or aerial combat in question. The Junkers Ju 87 G also did not prove to be a suitable tool, even considering the fact that the only bearer of the Golden Knight Cross , Hans-Ulrich Rudel , flew such a machine called "Kanonenvogel" in military jargon.

The first starting point for the development of the new weapon were the night attacks of the RAF on Germany since 1943. German night hunting associations reacted with the installation of the so-called "oblique music". Two or more machine guns MG 151/20 or MK 108 were installed in such a way that they fired forwards while the fighter, mostly a Junkers Ju 88 or Messerschmitt Bf 110 , flew over the bomber to avoid the bomber's rear armament , As part of the wild-sow night hunting process , it was examined whether the installation of the "oblique music" would make sense for single-engine day hunters. The result was numerous developments.

Technology [ edit | Edit ]
The installation of a MK 103 in the fuselage of a Focke-Wulf Fw 190 was prohibited because the light aircraft would not have withstood the recoil of the weapon. As a result, the MK 103 has undergone several changes. Instead of a pipe return and carriage mechanism was used as a gun brake a so-called "stick", the gun itself was open at the back. The use of a photo-optical sensor released the pilot from aiming. When shooting the "stick" was ejected. Thus put the recoil to a minimum. This development was one of the first recoilless guns without propellant. However, it was quickly recognized that an operation against bomber formations had to be ineffective. Since the device was recoilless, it could easily turn around, that is, the guns were directed at the same inclination down. This gave the fight against armored units a new opportunity. In fact, the "cell shower", as the device was called, no longer used and was installed only for testing purposes in eight fighters Focke-Wulf Fw 190 of the JG 10th The only purpose was to give day-hunters and fighter-bombers such as the Focke-Wulf Fw 190 F-8 a chance to carry heavy weapons and still maintain the hunting characteristics of the Focke-Wulf. A success of this weapon is not detectable, although hunters were involved with this weapon in combat actions.

Core ammunition should be used as in the MK 103 or hard core projectiles, the latter for armor piercing purposes. Since the weapon was einschüssig, the pilot did not have the opportunity to reload. After a high or low flight and the firing of the weapon, the pilot should have returned. As a substitute for the "Weird Music" proved the weapon as a failure, since the day hunters could operate only object bound. In the course of the "wild-sow-procedure", flying over the bombers was unnecessary either way, as the hunters had thus fallen below the flak limit and thus had a very high risk of self-harm.

translate.google.com/translate?hl=en&sl=de&u=https://de.wikipedia.org/wiki/SG_116&prev=search
www.wehrmacht-history.com/luftwaffe/armaments/30-mm-sg-116.htm

Doesn't look like the idea worked out very well. Seems the test planes were damaged from the cannon in testing, so it was dropped in favor of rocket technology.

It would nearly be impossible to aim and it probably could not reload in flight easily.
A shell taking 10 seconds to hit a target moving at 50kph at a range of several kilometres from a plane travelling 400 Kph without a semi automatic or automatic weapon? Sounds impossible.

You make an excellent point.

I'm certain most here have seen videos of this gun in action. It is amazing.