Mr Spaceman
Topic Author
Posts: 2723
Joined: Thu Mar 15, 2001 5:09 am

"One-Piece" Jet Engine Fan?

Sat Dec 15, 2001 5:08 am

Hi guys.

First off...here's some quick info on the engines that power the new Raytheon Premier 1 corporate jet.

The type of engines are the Williams-Rolls FJ44-2A Turbofan, each with 2,300 pounds of static thrust and a 3.3 to 1 bypass ratio.

This Williams engine has a "One-Piece Fan" with wide chord blades.

The article I read about the engines on the Premier 1 only mentioned that it's Williams engines had a One-Piece fan. It didn't mention anything about this One-Piece fan being a "first type" unique feature, etc.

So I'm wondering if there are any other jet engines out there that have a One-Piece fan at the beginning of their compressor stage? If so, are they on small corporate aircraft or large airliners?

Chris  Smile



"Just a minute while I re-invent myself"
 
desertjets
Posts: 7591
Joined: Fri Feb 18, 2000 3:12 pm

RE: "One-Piece" Jet Engine Fan?

Sat Dec 15, 2001 5:50 am

The Williams FJ44, first used on the Cessna CitationJet is milled from a single chunk of titanium I believe. I guess it saves some weight and reduces another thing that could break.
Stop drop and roll will not save you in hell. --- seen on a church marque in rural Virginia
 
XFSUgimpLB41X
Posts: 3961
Joined: Fri Aug 25, 2000 1:18 am

RE: "One-Piece" Jet Engine Fan?

Sat Dec 15, 2001 5:51 am

The new citations have them as do alot of the other new biz jets. They replace the "fir-tree" type fan blades that you hear clinking while they are turned off on the ground and spinning in the wind.
Chicks dig winglets.
 
Mr Spaceman
Topic Author
Posts: 2723
Joined: Thu Mar 15, 2001 5:09 am

RE: "One-Piece" Jet Engine Fan?

Sat Dec 15, 2001 6:38 am

Hi guys, Thanks for your replies.

I was thinking ...what if these engines experienced a bird strike, or FOD, or even a bad hail storm and one of their fan blades did get damaged. You would have to replace the "whole" front compressor fan instead of just a few removable blades that could be replaced. This sounds a lot more expensive. However, if these one-piece fans are made of titanium....they must be very strong and impact resistant.

Thanks for letting me know that other corporate jets also have these types of intake fans. Do you think airliners ever will?

Chris  Smile

"Just a minute while I re-invent myself"
 
vc10
Posts: 1360
Joined: Thu Nov 15, 2001 4:13 am

RE: "One-Piece" Jet Engine Fan?

Sat Dec 15, 2001 9:05 am

If you have seen an engine which has suffered a bird strike you will know that the bird itself might only damage a few blades?, but those blades usually go on to do untold damage to the rest of the engine

Who is online

Users browsing this forum: Flow2706, WIederling and 4 guests

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos