Bell amazing helicopter project

[hesham]

Hi,

we can call it all-wing helicopter,and its power untis was mounted
at the wing-tips.
http://www.flightglobal.com/pdfarchive/view/1954/1954%20-%201943.html

 

[LowObservable]

For God's sake, don't let the JFTL fanatics in the Army see this.

 

[sferrin]

Joint Faster Than Light? ;D

 

[flateric]

"The prototype is now being built." huh-huh

 

[overscan (PaulMM)]

Joint Future Theater Lift I think ;D

 

[yasotay]

Joint Future Theater Lift I think ;D

Nope. USAF does not do anything with propellors in the mainstream. Also I doubt it is; a. is stealthy enough b. does not have four turbopfan. One cannot get a job that pays well in the airline industry without four engine turbine time.

 

[Tailspin Turtle]

"The prototype is now being built." huh-huh

My library is in Connecticut and I am in Texas but I vaguely remember seeing a picture of a Bell powered model of this basic configuration. A reporter might have misconstrued the situation, either a statement about a powered model or the wishful enthusiasm of the Bell engineer he was talking to. The concept had initial appeal because tandem rotors are more efficient in pure lift (as opposed to lift over drag) than a single rotor helicopter, prone to fly sideways from the directional stability standpoint, and often flown sideways when maximum translational lift is required as in the departure from a confined area. My guess is that the cruise L/D of this configuration, even with the lifting fuselage, proved to be less than hoped for since none (?) have ever reached the prototype stage.

 

[Jemiba]

An artist impression of the Bell Copter:
(from Aviation Week .6.54)

 

[hole in the ground]

I wonder if the designer ever considered flying it sideways to reduce drag

 

[ermeio]

I am pretty sure that on this forum there was a rather deep piece of information about the bell D-218 cargo helicopter, but I am no longer able to locate it
I still have two pictures and the do not correspond to those in this thread and in the bell thread
can you address me to the precise thread

 

[hesham]

Hi Ermeio,

unfortunately there was no more Info about it;

https://books.google.com.eg/books?id=ziADAAAAMBAJ&pg=PA86&dq=popular+science+flying-wing&hl=en&sa=X&ei=PTIDVNrPJIfsO775gdAE#v=onepage&q&f=false

http://archive.aviationweek.com/search?QueryTerm=Bell+40-passenger+copter

 

[Retrofit]

I am pretty sure that on this forum there was a rather deep piece of information about the bell D-218 cargo helicopter, but I am no longer able to locate it
I still have two pictures and the do not correspond to those in this thread and in the bell thread
can you address me to the precise thread