JU88 start second engine

[Blackdog_kt]

I already replied in another topic but just in case you miss it, i'll repeat it here too.

The fuel cocks behind the seat select which feeder tank each engine is fed from (left/right tank or both).

The rest of the fuel controls in the switchboard (on the left side of the cockpit) are probably fuel pumps.

What really happened in the Ju88 is that the engines were fed only from two tanks. To get the fuel from the remaining tanks the pilot had to pump fuel from, for example, the auxiliary tank in the bomb bay to the feeder tanks.

In other words the fuel tanks are serially connected: tank 1->tank 2,etc->feeder tank->engine

The switchboard just allows the pilot to select which tank's contents go into the feeder tank.

That being said, i don't know exactly how it works or even if it's correctly modeled in the sim, so i turn everything on just in case. This might not be optimal in case of a fuel leak.

On the other hand, if the sim does model the fuel system correctly, then turning on only the two fuel cocks hidden behind the seat can give you surprises: you might have tons of fuel in the remaining tanks but if you don't pump them to the feeders, your engines will quit once the feeder tanks are dry.

I had once found a good resource about how it all really worked but i can't remember where i put it on my hard drive

[Gerfaut]

Originally Posted by Blackdog_kt

I had once found a good resource about how it all really worked but i can't remember where i put it on my hard drive

Yup. Maybe you thought about this one ?

http://www.youtube.com/watch?v=VJEUC...eature=related

[335th_GRAthos]

Excellent, Jibob did a great job releasing these videos!

Thanks for the link!

[Blackdog_kt]

Originally Posted by Gerfaut

Yup. Maybe you thought about this one ?

No, not this one, it's still useful though

Also, i think he only partially opens the fuel cocks in the video. They have the following positions for each engine: off, left tank, right tank, both tanks.

So, you can have the left engine running from the right feeder tank and pumping everything into that if your left feeder tank is leaking, or any other combination to save fuel after getting damaged.

The resource i was looking for was actually a website or document hosted in that website, one that was explaining how the fuel system worked in the 88.