Fokker/Republic Aviation D-24 Alliance

[GTX]

Hi folks,

I found a small reference to a joint project from 1962 between Fokker and the Republic Aviation Corporation for a Variable Geometry VTOL aircraft called the D-XXIV. Does anyone have any more information?

Regards,

Greg

 

[Orionblamblam]

Uck. That's a *terrible* bit of artwork, not even remotely accurate. The D-24 was much more conventional, and was aerodynamically simialr to Republics TXF (F-111) design entry.

 

[Dronte]

http://www.aerofiles.com/_repub.html

http://www.aerofiles.com/repub-vfx.html

 

[Dronte]

Additional information and a very good illustration

http://www.dutch-aviation.nl/index5/Military/index5-1%20D24.html

 

[lark]

GTX,

Orionblam.. is right.The artwork you presented
was part of an advertisement from Republic Aviation
published a few months a head of the release of
the first Fokker/Republic D.24 info.
This concept was indeed not as big as their TFX contender.

 

[lark]

the Dutch-aviation page shows two different designs.
The above one is the Republic TFX contender.

(the only photo of the mock-up ?)

Illustration lower is the D-24.

Best All.

 

[overscan (PaulMM)]

Aha!

A better 3 view, plus model shots, from The Annals of the Polymorph (Air International May 1975)

 

[overscan (PaulMM)]

Republic submitted a similar design to the USN VAX requirement.

 

[Matej]

Model from museum in Amsterdam airport.

WarbirdTECH Series, Fairchild-Republic A/OA-10 Warthog, pg. 18

 

[overscan (PaulMM)]

Additional pic from "Annals of the Polymorph", Air International May 1975

 

[Jemiba]

A cut-away from Flying Review vol.19, 1963

 

[Matej]

Another.

 

[Thorvic]

Are there any dimensions and details to go with the D-24 drawings and artwork ?

Cheers

Geoff

 

[Skybolt]

Artist views from "Fokker, Planemaker to the World".

 

[Jemiba]

In the Flying Review vol.19, 1963 the only details given are :
BS.100-3 engine with 38.500 lb thrust, 70° sweep angle in
high speed configuration, aspect ratio for swept wings is
1,09 and 3,15 for low speed configuration, max. speed at
sea level Mach 1.25 and 2.4 above 40.000ft.
No dimensional data, sorry !

 

[Jemiba]

Quite funny, in RAF Flying Review 9/62 there's an advert from Fokker/Republic about
the Alliance, but the shown aircraft hasn't much in common with the D-24, shown in
an article just two pages later !
Well, as you've probably noticed, I'm guilty again of buying a pile of old magazines,
carrying them home in secrecy and reading them, sitting on the couch with an innocent
face ("Oh, I had them in the attic for many years ...") ;D

 

[Matej]

This is what I call "mad drawing".

 

[Skybolt]

One asks were's the space for the wings' pivot... ??? All the way, it's a Swallow disguised as an Alliance ;D :

 

[lark]

Re-reading an old Dutch book (1964) by Hugo Hooftman about
jetfighters , the writer mentions that the D-24 Alliance should be a development of the Republic RAC-758-1 design.
(could this be Repulics TFX contender?)

Two versions of the D-24 were planned.
- the one with the polymorph delta wing we all know
- a version with the more normal swing wing as in other VG designs.

By the way , the Barnes Wallis-Vickers 'Swallow' should be a good one
to continiue..

 

[overscan (PaulMM)]

From the aforementioned Flying Review:

 

[overscan (PaulMM)]

 

[overscan (PaulMM)]

Flight have posted a cutaway of the Fokker/Republic Alliance.

 

[hesham]

Hi,

a little different from early Republic Aviation VTOL aircraft,please notice the
cockpit shape.

http://www.flightglobal.com/pdfarchive/view/1963/1963%20-%200897.html

 

[Orionblamblam]

Hi,

a little different from early Republic Aviation VTOL aircraft,

That's the Fokker/Republic D-24 "Alliance," a VTOL striek fighter but *not* an F-111 design.

 

[overscan (PaulMM)]

Added to correct topic.

 

[archipeppe]

Really cool design.

But I have a question about that: what kind of advantages could offers this odd configuration, compared to a "normal" Harrier or AV-8 (which use the same Pegasus engine)??

Perhaps the intentions of designers was to achieve supersonic speed??
In that case, I suppose, that the VG configuration itself wasn't sufficient to go supersonic due to the natural limitations offered by Pegasus (high cross section and lack of A/B).

 

[Skybolt]

Yep, it was to be supersonic. The NMBR-3 NATO spec asked for a two-phase approach: interim (subsonic, that generated the likes of the Harrier and the VAK-191), and definitive (supersonic), of which the only two to reach flight stage were the Mirages (III-V and Balzac) and the VJ-101C.

 

[amsci99]

What were the advantages of adopting a polymorph delta wing? Sure looks like something out of Captain Scarlet or any other Gerry Anderson production.

 

[XP67_Moonbat]

I want to thank everybody here for their finds. It genuinely feels good to see something here I've absolutely never heard of. Good work, guys.

Moonbat

 

[Orionblamblam]

I've always been surprised at how "popular" the D-24 was in its day, appearing all over the aero press, yet none of the artwork or drawings were ever quite right.

 

[nugo]

Hi Orionblamblam!

RAC-758-1A30--Very good drawing.
On the drawing data is not seen well. It would be interesting to know.
If you can show?

 

[Orionblamblam]

Hi Orionblamblam!

RAC-758-1A30--Very good drawing.
On the drawing data is not seen well. It would be interesting to know.
If you can show?

The full rez image... and many more... will be in APR issue V2N2, which I'm working on now.

 

[Barrington Bond]

Bristol design possibly related to this thread? From Bristol Siddeley Review's 1962/3.

 

[Antonio]

Bristol design possibly related to this thread?

Wow it looks like a clone ???

 

[overscan (PaulMM)]

Once again... ;D

In this period Bristol (Engines) is not Bristol (Aircraft)

This is a model of the Alliance, displayed by BSEL to promote the Pegasus engine which powered it. Its either a different variant or just inaccurate.

 

[Triton]

Larger version of previous artist's impression of Fokker/Republic Aviation D-24 Alliance.

Source: http://www.dutch-aviation.nl/index5/Military/index5-1%20D24.html

 

[overscan (PaulMM)]

Bunch of NASA windtunnel models of the Alliance.

NACA/NASA Langley: Celebrating 100 Years

NASA.gov brings you the latest images, videos and news from America's space agency. Get the latest updates on NASA missions, watch NASA TV live, and learn about our quest to reveal the unknown and benefit all humankind.

crgis.ndc.nasa.gov

 

[overscan (PaulMM)]

One colour pic

http://crgis.ndc.nasa.gov/historic/Additional_Photos_for_30_X_60_Full_Scale_Tunnel:_Other_Tests_2#Variable_Sweep

 

[Stargazer]

A rare glimpse at Republic's TFX design from the bottom up. But wait?? Was the TFX supposed to be VTOL, too? Or did I miss something? Isn't this the TFX then?

http://crgis.ndc.nasa.gov/mw/images/1/1e/1961_Variable_Sweep.jpg

 

[Skybolt]

No, it in't TFX. Republic worked on a VTOL version of Kartvely swing-wing delta concept used in TFX, SST and AMPSS too, both for ADRC and NATO NRMB-3. The NATO version, did in collaboration with Fokker, gave birth to the "Alliance" concept.