View Full Version : Disadvantages of Wide Chord Fans

27th Jun 2006, 03:19
Hi all.

Have tried to track down some info, but cant manage to find any about the following

- Are their any dis-advantages of using wide chord fan blades

- Are their any disadvantages of wide chord fan engines in general

- Any A340-300/600 drivers care to divulge the fuel burns for thier aircraft

Many thanks

28th Jun 2006, 17:55
New prod costs of wide chord Ti blades??

Harder to repair than clappered blades I think.

29th Jun 2006, 06:15
mostly advantages like
less damage due f.o.d.,iceing,bird hits,etc.
no mid span shrouds in fan,more strength

The disadvantages are
-high weight
-low aspect ratio i.e. low thrust

29th Jun 2006, 12:54
I wouldn't bet on the "low aspect ratio == low thrust" connection. A rotor with a duct wrapped around it minimizes tip losses, thus aspect ratio is not really a factor.

And use of modern materials (hollow titanium or advanced composites) minimizes the weight factor.

29th Jun 2006, 18:12
High cost approaching 50K US per single blade