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Various Bell tilt-rotor projects

F-14D

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In response to a post a while back saying that some of the illustrations look like an LHX proposal, I am attaching two pictures of Bell's Tilt-Rotor proposal for LHX. Unfortunately, when it became apparent that a Tilt-Rotor (from Bell or from Boeing) would have easily outclassed a conventional rotorcraft, the Army changed the rules so as to effectively eliminate Tilt-Rotors.

Hope the pictures come through!
 

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hesham

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Hi,

my dear pometablava spoke before about those
tilt rotor aircraft projects for Bell;

CTR-800 eight seat tilt rotor project in size of XV-15.
CTR-1900 19-seat new tilt rotor with low wing.
 

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Jemiba

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Looks similar to the tilt-rotor in this advert from
Aviation Week .10.1967
 

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lark

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looks like the Bell model 266...

(aaia.ovl)
 

hesham

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Yes my dears Jemiba and Lark,

and the completing;

CTR 22 a 31-passengersand many changes of V-22.
CR derivative of V-22 as 39-passengers aircraft.
 

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hesham

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Hi,

and the CTR-7500 75-seat tilt rotor aircraft project.
 

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hesham

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Hi,

the Bell-Boeing D-600 civil tilt-rotor aircraft,it was
developed from CTR.
http://www.flightglobal.com/PDFArchive/View/1996/1996%20-%202896.html?search=Bell%20D%20helicopter%20project
 

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Antonio

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From Avion Revue (Spanish magazine) June 1984

Bell Model 303 (passenger)

Bell Model 314 (gunship) and 314D (radar) designed in 1975 as a OV-1 replacement
 

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Maveric

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Hi pometablava,

do you have some technical data for these projects? :eek:

Servus
 

yasotay

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I have attached a picture of a Bell concept (Son of BAT) that was put together when the US Army asked the industry to show them what they could do as far as rapid production aircraft. Using composites and glue none the less. While I do not recall all of the details, I remember seeing a briefing where the fuselage came in two pieces (top and bottom), as did the wings. As far as I know the project never went further than the initial effort of design.
 

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yasotay

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Floating through old briefings I came across a couple of Bell designs. The first two are is a Pressurized V-22. It also appears to have a fixed wing , vice a turnable one for ship storage. It may be my imagination but the prop-rotors appear to be larger as well, leading me to believe that this was/is intended for a land based platform.

The third is obviously an attack TR. I think it was the final work on a Army project to do rapid assembly rotorcraft. That is however a guess on my part.
 

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flateric

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yasotay said:
The third is obviously an attack TR. I think it was the final work on a Army project to do rapid assembly rotorcraft. That is however a guess on my part.
Aren't they the same - http://www.secretprojects.co.uk/forum/index.php/topic,1222.msg25898.html#msg25898
 

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yasotay

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I suspect that the one you (re)posted, which I know to be really nothing more than a academic drill for industry on composite construction, might draw heavily from the earlier attack tilt rotor. There are several differences that I think make them different design efforts. One has fixed engines that Bell stopped work on a while back while the others have the (now) trademark tilting nacelles. One is a single seat while the other is two, something that is not a simple as carving out some of the fuel tank in rotorcraft. So while I suspect their is a lineage between the two concepts, I think that they are different works. Perhaps someone else on the Forum could provide more info....
 

Antonio

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Great find hesham

Thanks
 

AeroFranz

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number 12 sure makes you think of Eagle Eye.
 

F-14D

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hesham said:
And notice the ASW variant;
An "SV-22" (see Hesham's first post yesterday was seriously considered early on for a number of reasons. Two of the big ones were to get the broad geographical coverage necessary to deal with the expected high speed subs under development by the Soviet Union prior to its collapse, especially when there was no CV around. The second concern was it may have been the only practical way to search for Typhoon and other SLBM subs operating under the ice
 

hesham

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Hi,

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19900005777_1990005777.pdf
 

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hesham

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There is a little differents between Bell D-266 and Model-266,see the tail.

http://www.aiaa.org/tc/vstol/unbuilt/index.htm
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19730015345_1973015345.pdf
 

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Triton

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Artist's impression of Bell D-252 VTOL transport aircraft with two T64 turbines. Entered into Tri-Service competition and designed to meet these requirements:

  • Weight: 35,000 lbs.
  • Payload: 4 tons
  • Operating Radius: 200-300 miles
  • Ferry Range: 2,200-2,600 miles
  • Cruising Speed: 250-300 knots
  • Maximum Speed: 300-400 knots

Source:
http://www.aiaa.org/tc/vstol/unbuilt/
 

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Triton

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Artist's impression of Bell Model 266 V/STOL transport circa 1966. Project funded in 1966 & 1967 via US Army Composite Aircraft Program.

Characteristics:

  • Power: Two General Electric T-64's which power three-bladed proprotors.
  • Speed: 370 knots (686 km/h)
  • Weight: 35,000 lbs. (15,875 kg.)
  • Capacity: 25 seats

Source:
http://www.aiaa.org/tc/vstol/unbuilt/
 

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Triton

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Artist's impression of Bell D-267 tilt rotor 4-26-1968.

First design study for a full-scale tilt rotor demonstrator. Significantly smaller than the D-266, and oriented toward commercial rather than military operation.

Source:
http://www.aiaa.org/tc/vstol/unbuilt/
 

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hesham

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Hi,

here is two variants to both of those Bell Models;

Model 266 with tilt-rotor
Model 266 with folded tilt-rotor

Model 300-A1A with normal tail
Model 300-A2A (XV-15) with H-tail

http://books.google.com.eg/books?id=m0Jd3ZJhRcgC&pg=PA99&dq=Bell+DUCTED+ROTOR&hl=ar&ei=kVOwTJ_1CY-hOqvr-PsN&sa=X&oi=book_result&ct=result&resnum=17&ved=0CHwQ6AEwEA#v=onepage&q&f=true
 

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hesham

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Hi,

here is the Bell tilt-rotor projects; 21-passenger,45-passenger
and 100-passenger.

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19750013184_1975013184.pdf
 

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hesham

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Hi,

The AVLABS-Bell compound helicopter is unknown to me.

http://www.dtic.mil/cgi-bin/GetTRDoc?AD=AD684317&Location=U2&doc=GetTRDoc.pdf
 

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Tailspin Turtle

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hesham said:
Hi,

The AVLABS-Bell compound helicopter is unknown to me.

http://www.dtic.mil/cgi-bin/GetTRDoc?AD=AD684317&Location=U2&doc=GetTRDoc.pdf
When the D266 didn't "fly" as a government-funded program, Bell initiated a scaled-down version as the Model 300 on IR&D funds. It was to be powered by two PT6s and resulted in the 25-foot diameter rotor and gearbox proposed for the Model 301 in response to the NASA/Army RFP for a Tilt Rotor Research Aircraft. The Model 301 was powered by two T53s to meet the one-engine-inoperative requirement and was designated XV-15.
 

Stargazer2006

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Found these pics of the Bell Model 266 project at NTSR:

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19730015345_1973015345.pdf
 

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Mark Nankivil

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Greetings All -

From Gerald Balzer's collection artwork labeled "XV-15 Civilian Version". Appears to be the Model 303 to me.

Enjoy the Day! Mark
 

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