Which is better?

[oakranger]

Lets say we take two B-17's, but one is modified that the props are behind the wings and facing the opposite to push the A/C.  If these two where flying at the same alt, which one would go faster and consumed less fuel?

[mechanic]

no idea.

my first thought is that pusher props would have to contend with the air flow disruption of the wing. Also they put them on the front for a reason so...I going to say the standard B17 will be more fuel efficient.

[Strip]

Never mind that an air cooled radial mounted in the rear would be a nightmare to cool...

[Shuffler]

I believe in the front would be more efficient for the reason posted above. To cool the engines pushing would require more ducting and probably more weight.

The OP was probably thinking about the prop wash over the wings contributing to more drag. Makes since thinking about it but.... does it offset weight and drag otherwise.

A post to make you go Hmmmmm. 

[oakranger]

I believe in the front would be more efficient for the reason posted above. To cool the engines pushing would require more ducting and probably more weight.

The OP was probably thinking about the prop wash over the wings contributing to more drag. Makes since thinking about it but.... does it offset weight and drag otherwise.

A post to make you go Hmmmmm. 

Yea, i though about this when "Strategic Air Command " with James Steward was on.  And observing the B-36 on how the props where facing the opposite way.  Wonder if they was more efficient or not.

[bcadoo]

If its designed properly you don't take the hit.  (helps if you're using turboprops)

[Die Hard]

The prop wash create a lot of turbulent airflow which increases drag over any surface (wings in this case), so a push-prop is more aerodynamically efficient. However, with air cooled radial engines the installation may prove difficult, but not impossible. The B-36 bomber had six Pratt & Whitney R-4360-53 Wasp Major radials.

[mechanic]

and a nuclear warheaad onboard by the look of it.. 

[AWwrgwy]

and a nuclear warheaad onboard by the look of it.. 

It doesn't have the "Krusty Glow" about it....


wrongway

[oakranger]

and a nuclear warheaad onboard by the look of it.. 

SHHHHHHHHHHHHHHHHHH....... We dont want to Commies know about it.     

[bigsky]

To crush your enemies, see them driven before you... and to hear the lamentation of their women!

[crazyivan]

SHHHHHHHHHHHHHHHHHH....... We dont want to Commies know about it.     

too late spotted you with my trusty telescope!

SHAMPOO IS BETTER!