NASA Large Civil Tiltrotor (LCTR) designs

[hesham]

Hi,

the LCTR concept.
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20070017952_2007016644.pdf

 

[Stargazer]

The potential impact of introducing civil tiltrotors into the National Airspace System (NAS) has been the subject of several comprehensive studies dating back to 1987. CTRs are expected to successfully compete with fixed-wing aircraft provided a supporting infrastructure (ground facilities and air traffic control) is in place.

During 2001-2004, NASA sponsored or co-sponsored several studies of the Runway Independent Aircraft or RIA model of operations whereby existing stub runways could be used by VTOL operating in STOL mode in addition to operating in VTOL mode from vertiports. This operational concept has the potential to increase the capacity of the air transportation system. The increased capacity could then be used to increase throughput or reduce delay significantly throughout the system.

Correspondingly, in 2005, the NASA Heavy Lift Rotorcraft Systems Investigation examined in depth several rotorcraft configurations for large civil transport, designed to meet technology goals of the NASA Vehicle Systems Program. The investigation identified the Large Civil Tiltrotor (LCTR) as the configuration with the best potential to meet the technology goals. Additionally, since the studies of the late-1980’s and early 1990’s, recent events demonstrating the critical role of rotorcraft in disaster (man-made and natural) relief provide another compelling need for civil transport rotorcraft to be fully incorporated into the next generation airspace system.

In short, the role of advanced, high-speed rotorcraft designed for civil transportation should be re-visited to account for advances in rotorcraft technology, advances in airspace modeling, and the more prominent role of rotorcraft in public safety. Advanced civil tiltrotors, however, must be considered within the context of the Next Generation Air Transportation System, aka "NextGen".

 

[Stargazer]

Sources:

- http://rotorcraft.arc.nasa.gov/Publications/files/YoungATIO_894_Final.pdf
- http://rotorcraft.arc.nasa.gov/Publications/files/SRW_MDATD_Yamauchi_030711_864.pdf
- http://rotorcraft.arc.nasa.gov/Publications/files/SRW_FDC_LCTR_HQ_Studies_v4_869.pdf

 

[hesham]

We spoke about this concept before;


http://www.secretprojects.co.uk/forum/index.php/topic,2140.msg58333.html#msg58333

 

[Stargazer]

We spoke about this concept before

Perhaps, hesham, but a search on "LCTR2" or "Large Civil Tiltrotor" did not produce any results.

Besides, it is my understanding that overscan and the rest of the admins want to do away with those endless fit-all topics with generic titles such as "US VTOL concepts". Some projects and/or some manufacturers deserve to have a page of their own.

 

[Stargazer]

The Large Civil Tiltrotor (LCTR) conceptual design was developed as part of the NASA Heavy Lift Rotorcraft Systems Investigation (Ref. 1). The concept has since evolved into the second-generation LCTR2, described in detail in Refs. 2 and 3. The LCTR2 design goal is to carry 90 passengers for 1,000 nm at 300 knots, with vertical takeoff and landing capability. The overall purpose of the design effort is to develop a consistent basis for evaluating the benefits of advanced technology for large tiltrotors. This paper performs a preliminary assessment of the impact of advanced engine and gearbox concepts on mission performance, and presents criteria for making the tradeoff between a variable-speed power turbine (VSPT) engine and a multi-speed (shifting) gearbox.


A lot more in source document: Preliminary Assessment of Variable Speed Power Turbine Technology on Civil Tiltrotor Size and Performance

 

[Mark Nankivil]

Hi All -

Rather sharp looking model:

http://www.ebay.com/itm/NASA-In-House-Civil-Tiltrotor-Aircraft-Experimental-CTR-Desk-Model-Prototype-/300903462307?pt=LH_DefaultDomain_0&hash=item460f3e75a3

Enjoy the Day! Mark

 

[hesham]

From the very small reports left,


http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20100024308_2010025647.pdf

 

[Stargazer]

hesham, we have a topic for these already:
http://www.secretprojects.co.uk/forum/index.php/topic,14107.msg154290.html#msg154290

 

[hesham]

Sorry,and I don't remember it.

 

[hesham]

The LCTR wing tunnel Model,


http://rotorcraft.arc.nasa.gov/

 

[Triton]

Hi All -

Rather sharp looking model:

http://www.ebay.com/itm/NASA-In-House-Civil-Tiltrotor-Aircraft-Experimental-CTR-Desk-Model-Prototype-/300903462307?pt=LH_DefaultDomain_0&hash=item460f3e75a3

Enjoy the Day! Mark

Looks like the model is painted with the civilian Boeing-Vertol color scheme. I wonder if this was a Boeing or Boeing/Bell concept.

Is it a model of this Boeing/Bell concept:

Source:
http://up-ship.com/blog/?p=6862

A concept for the 75 passenger CTR-7500?

 

[F-14D]

Hi All -

Rather sharp looking model:

http://www.ebay.com/itm/NASA-In-House-Civil-Tiltrotor-Aircraft-Experimental-CTR-Desk-Model-Prototype-/300903462307?pt=LH_DefaultDomain_0&hash=item460f3e75a3

Enjoy the Day! Mark

Looks like the model is painted with the civilian Boeing-Vertol color scheme. I wonder if this was a Boeing or Boeing/Bell concept.

The model 360 was all Boeing, although some technologies from it would work their way into Boeing's contribution to the V-22.

 

[Triton]

The model 360 was all Boeing, although some technologies from it would work their way into Boeing's contribution to the V-22.

I included the inline image to identify the paint scheme of the model as belonging to Boeing, I was not implying a relationship between the Boeing-Vertol 360 and the V-22 or the civil tilt rotor project. Sorry for any confusion my comments caused.