F-4 Rear Canopy

[Devil 505]

What exactly was the purpose for the water injection? Was it also used on the F-106?

[Puma44]

What exactly was the purpose for the water injection? Was it also used on the F-106?

Water injection provided more thrust.  The "Six" didn't have water injection.  It did have a hard burner light off.  There was no doubt that a 106 was taking off when the burner lit.  It was a very robust explosive sound that rattled windows all over base.

[Oldman731]

It did have a hard burner light off. 

Other than some sort of preverted party idea....WTF is a hard burner light off?

- oldman

[Puma44]

Other than some sort of preverted party idea....WTF is a hard burner light off?

- oldman

The six AB lit off all at once kinda like tossing a bucket of gas on your campfire.....WHOOSHBANG all at once vs most other AB equiped jets that lit off in a graduated manner.  Still very noisy when lit off, just not the intial BANG.  Otherwise know as a soft lite vs a hard lite. Note the burner shrouds on this F-4.  In MIL power they would be closed down making the exhaust opening smaller in diameter.  With the burner lit, the shrouds would modulate as the pilot selected a range of power between MIN and MAX AB.