McDonnell-Douglas Model 260 VSTOL project

[Mark Nankivil]

My pleasure - here's individual scans of the artwork on the info card.

Enjoy the Day! Mark

 

[Stargazer]

A color profile of the anti-submarine warfare variant of the Model 260 illustrated by Italian artist Elio Torregino for Interavia in 1975.

 

[hesham]

Hi,

may be this was McD-260.

http://www.dtic.mil/dtic/tr/fulltext/u2/a060206.pdf

 

[Triton]

Thank you, Mark!

 

[overscan (PaulMM)]

My pleasure - here's individual scans of the artwork on the info card.

Enjoy the Day! Mark

I missed this - very nice indeed!

 

[overscan (PaulMM)]

Different, higher res scan of already known Model 260 artwork.

Source: http://archive.org/details/C-1976-2208


(edited picture)

 

[Stargazer]

Thanks a lot Paul for sharing these magnificent scans with us. "Type A" is an all-time favorite topic for me, and it's such a pleasure to get so many updates at once!

 

[Stargazer]

Another key piece of the Model 260 puzzle, McDonnell Report MDC A4551:

LIFT/CRUISE FAN V/STOL TECHNOLOGY AIRCRAFT DESIGN DEFINITION STUDY: VOLUME 1 - TECHNOLOGY FLIGHT VEHICLE DEFINITION

This 246-page document is filled to the brim with diagrams and information that should satisfy every Model 260 buff like me...

Two variants are described in this report:

• Model 260-RTA-1, with Turbotip RTA propulsion system
• Model 260-RTA-2, with Mechanical RTA propulsion system

I've attached a few key images, including the painfully reconstructed blueprints (low quality, but better than nothing).

 

[VTOLicious]

Another key piece of the Model 260 puzzle, McDonnell Report MDC A4551:

LIFT/CRUISE FAN V/STOL TECHNOLOGY AIRCRAFT DESIGN DEFINITION STUDY: VOLUME 1 - TECHNOLOGY FLIGHT VEHICLE DEFINITION

This 246-page document is filled to the brim with diagrams and information that should satisfy every Model 260 buff like me...

Two variants are described in this report:

• Model 260-RTA-1, with Turbotip RTA propulsion system
• Model 260-RTA-2, with Mechanical RTA propulsion system

I've attached a few key images, including the painfully reconstructed blueprints (low quality, but better than nothing).

What a treasure! Thx a lot for posting the stitched blueprints - great work!

 

[VTOLicious]

Isn´t it interesting that McAir didn´t consider a mechanical propulsion system in previous design studys?

MDC A3440/ VOLUME 1 - NAVY OPERATIONAL AIRCRAFT
MDC A3440/ VOLUME 2 - TECHNOLOGY AIRCRAFT

...both are entirely focused on the turbotip propulsion!

Further more the Hamilton Standard 62inch variable pitch Lift Fan for RTA-2 was originally designed for Boeing only! Extract from NASA Report CR-134988:

...NASA Ames study contracts were given to McDonnell Douglas, Rockwell-International and the Boeing Company starting in late 1974. Hamilton Standard was awarded contract NAS3-19414 by the NASA Lewis Research Center to support these studies with propulsion data for shaft driven, variable pitch lift and lift/cruise fans. Of the three airframe contractors, Boeing was the only one to study an aircraft having a shaft driven, variable pitch fan, lift/propulsion system. Therefore, the criteria for the lift fans discussed in this study were derived to meet the Boeing Company aircraft concepts...

Btw, VOUGHT had a very similar nose fan+vectored nozzle concept in its shortlist (pic attached).

Rgds, Michael

 

[AeroFranz]

Interesting point...makes you wonder why. Maybe Boeing held patents for the shaft-drive? or more simply a case of not-invented here?
Personally I see tip drive as volume-hungry and heavy, but I'm sure we can find cons in the shaft-drive as well...

 

[Mark Nankivil]

Very nice find Stephane - thanks!

Enjoy the Day! Mark

 

[allysonca]

Here is one from my collection. There were 5 model variants in the series that I had using the same airframe. An ASW, AWAC's, All Weather, Transport and Attack versions. One model of 6 had interchangeable parts to make versions of the others. Scale was 1/40th I think, and Pac Min made a wonderful 1/10th scale that I would have killed for in the all weather version.

 

[overscan (PaulMM)]

Nice model Allyson


Circle-5 posted this awesome pic of the modular model earlier in the topic:

 

[Mark Nankivil]

Good Day All -

Yesterday we had a package of drawings donated to the Museum from a retired McDonnell Douglas engineer. One of the drawings was this one detailing the fuel system for the Model 260.

Enjoy the Day! Mark

 

[Grey Havoc]

WOW!!!!!!!!!! Makes me wish even more there had been a production of the type, at least a couple of demonstrators... :-[

Imagine what they could have done with the VOD/Marine Assault variant re. Operation Eagle Claw.

(h/t Mark Nankivil)

 

[RAP]

http://www.ebay.com/itm/161633819333?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

 

[Triton]

Nice find, RAP.

 

[VTOLicious]

From the AW-archive:

 

[overscan (PaulMM)]

http://www.ebay.com/itm/161633819333?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Posting ALL images before they disappear.

 

[overscan (PaulMM)]

And last few

 

[Motocar]

Excelent post, unknow for my....!

 

[Sabrejet]

I've had this photo for some time, among a load of shots taken at (IIRC) NASA Ames. I think it was taken in the 1980s and I can see it's obviously a mock-up. But a mock-up of what?

 

[raptor82]

My two cents:
MDC Model 260

Thread 'US Navy "V/STOL Type A" competition'
https://www.secretprojects.co.uk/threads/us-navy-v-stol-type-a-competition.15478/

https://www.secretprojects.co.uk/threads/us-navy-v-stol-type-a-competition.15478/post-163959

 

[Sabrejet]

That's the one! Thanks

 

[publiusr]

Whew!

I thought Ed Gein was branching out…
Of course, every florist is similar if you think about it..