Northrop (Y)A-9 AX contender

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
Found via google patent search. Northrop design, seems to be related to early stages of AX.

Patent: D218,856
 

Attachments

  • Northrop-AX-1.jpg
    Northrop-AX-1.jpg
    51.1 KB · Views: 2,656
  • Northrop-AX-2.jpg
    Northrop-AX-2.jpg
    51.5 KB · Views: 831

Pioneer

Seek out and close with the enemy
Senior Member
Joined
May 22, 2006
Messages
2,154
Reaction score
688
Great find with the Northrop 'early AX design' drawings, Overscan!
Does the Patent info you found have any technical data/specifications ????

Regards
Pioneer
 

elmayerle

ACCESS: Top Secret
Senior Member
Joined
Jan 8, 2006
Messages
1,444
Reaction score
327
overscan said:
Found via google patent search. Northrop design, seems to be related to early stages of AX.

Patent: D218,856

Shades of the Learfan!!
 

JAZZ

ACCESS: Secret
Joined
Mar 12, 2006
Messages
297
Reaction score
124
Interesting find ...thought i would have a go at quickly dressing one of the drawings up...prehaps I should post this under-models-art?
 

Attachments

  • US- Northrop-AX-1_001d.jpg
    US- Northrop-AX-1_001d.jpg
    126 KB · Views: 963

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
Unfortunately, its an "ornamental design" patent and includes little information except it was "made in the course of Contract No. F33657-67-C-100 with the United States Air Force" and filed June 30, 1969.

Nice addition to the drawing, Jazz.
 

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
Found a little mention of this here: http://aeroweb.brooklyn.cuny.edu/specs/northrop/ya-9a.htm

I worked at Northrop (now Northrop-Grumman) in the 1980s.
When I visited the March AFB/ARB Air Museum, I finally
got my first chance to see and touch one of the A-9A prototypes.

The most unusual variant of the A-9A proposed was a
desktop 1/48th scale model of a PROPELLOR version of
the A-9A. The propellor arrangement was a PUSHER
configuration, with 3 tail fins arranged in a Y shaped
configuration: 1 ventral fin, 2 angled dorsal fins.

I am not sure what they had in mind with that concept
model - perhaps a slower, Skyraider type attack craft.
I'll probably never know for sure, but the model was
interesting.

So theres a model on display at March AFB Museum? Or is he referring to somewhere else?
 

lark

ACCESS: Top Secret
Senior Member
Joined
Feb 17, 2006
Messages
1,811
Reaction score
122
Northrop Corp. produced a flying demonstrator of its
turbo-pusher concept.

A photo is shown on page 26 of Aviation Week & Space Techno
of September 23 , 1968.
 

lark

ACCESS: Top Secret
Senior Member
Joined
Feb 17, 2006
Messages
1,811
Reaction score
122
Illustration shows a little pusher aircraft with fixed 3 wheel undercariage.
3th wheel in the lower tailfin.

Pusher prop at the extreme tail end.

Overall configuration is close to the drawings already shown
but plane looks no so big.

'Northrop Turbo pusher' written on the side of the aircraft.
 

amsci99

ACCESS: Secret
Joined
May 2, 2006
Messages
239
Reaction score
11
Matej,

This looks like the Sierra Sue and there is an article on it in Air Enthusiast. The link is at
http://shop.keypublishing.com/acatalog/Air_Enthusiast_issue_116.html
 

amsci99

ACCESS: Secret
Joined
May 2, 2006
Messages
239
Reaction score
11
Matej,

Unfortunately not. I am trying to track down a used copy on eBay.
 

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
http://airpower.callihan.cc/HTML/Spotlight/SierraSue.htm

http://web.mit.edu/asfalcon/www/Images/LAX%20Photos/2006_07_01_1/IMG_0652.JPG

Some pictures - its at the Western Museum of Flight.

The Southern California Historical
Aviation Foundation (SCHAF) has
proudly announced the arrival of
"Sierra Sue" at their Western Museum of
Flight in Hawthorne, California, where
it will be on display for an undetermined
period of time. A unique "pusher"
aircraft with a single propeller in
back of its tail, Sierra Sue was designed
and built in the 1950s as a race plane
by engineers at North American and
Northrop in their spare time. In the
late 1960s, it served as a concept
demonstrator in developing a prototype
attack aircraft for the U.S.Air Force, but
the design was dropped when the Air
Force announced its requirement for a
jet, rather than a propeller aircraft.
 

Antonio

Moderator
Staff member
Senior Member
Joined
Jan 22, 2006
Messages
3,656
Reaction score
535
Thanks for the pics, Paul

In this photo, we can see the AX concept illustrated in the papers in front of the aircraft.
 

Attachments

  • 02WMF-S1-3.jpg
    02WMF-S1-3.jpg
    59.4 KB · Views: 1,186

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
Unfortunately the Western Museum of Flight had to move and I'm not sure of the current status at its new site. If anyone is in the area, maybe they could visit and photograph the pics on the placard?

;D
 

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
Added Hesham's second Northrop patent. Clearly a variant of the previous design.
 

Attachments

  • NorthropAX2.jpg
    NorthropAX2.jpg
    61.3 KB · Views: 1,008
  • NorthropAX1.jpg
    NorthropAX1.jpg
    57.7 KB · Views: 1,095

jackehammond

ACCESS: Restricted
Joined
Sep 17, 2007
Messages
18
Reaction score
2
Dear Members,

Did the Northrop YA-9A have any advantages over the Fairchild YA-10A design?

Jack E. Hammond
 

flateric

ACCESS: Above Top Secret
Staff member
Top Contributor
Senior Member
Joined
Apr 2, 2006
Messages
9,304
Reaction score
1,884
Some good thoughts here
http://aeroweb.brooklyn.cuny.edu/specs/northrop/ya-9a.htm
 

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
A-9 patents, for completeness.
 

Attachments

  • A-9-1.jpg
    A-9-1.jpg
    114.5 KB · Views: 954
  • A-9-2.jpg
    A-9-2.jpg
    102.5 KB · Views: 947

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
Interesting A-9 images

Sources:

Northrop: An Aeronautical History
http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=3198
 

Attachments

  • A-9-9.jpg
    A-9-9.jpg
    208.6 KB · Views: 403
  • A-9-8.jpg
    A-9-8.jpg
    126.9 KB · Views: 358
  • A-9-6.jpg
    A-9-6.jpg
    24 KB · Views: 384
  • A-9-5.jpg
    A-9-5.jpg
    39.5 KB · Views: 366
  • A-9-4.jpg
    A-9-4.jpg
    56.8 KB · Views: 341
  • A-9-3.jpg
    A-9-3.jpg
    83 KB · Views: 320
  • A-9-2.jpg
    A-9-2.jpg
    46.2 KB · Views: 435
  • A-9-1.jpg
    A-9-1.jpg
    104.4 KB · Views: 1,027

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
More
 

Attachments

  • A-9-13.jpg
    A-9-13.jpg
    255.2 KB · Views: 344
  • A-9-12.jpg
    A-9-12.jpg
    132.1 KB · Views: 286
  • A-9-11.jpg
    A-9-11.jpg
    142.2 KB · Views: 293
  • A-9-10.jpg
    A-9-10.jpg
    259.8 KB · Views: 317

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
More
 

Attachments

  • A-9-19.jpg
    A-9-19.jpg
    169.8 KB · Views: 292
  • A-9-18.jpg
    A-9-18.jpg
    73.9 KB · Views: 277
  • A-9-17.jpg
    A-9-17.jpg
    56.1 KB · Views: 322
  • A-9-16.jpg
    A-9-16.jpg
    37.7 KB · Views: 426
  • A-9-15.jpg
    A-9-15.jpg
    38 KB · Views: 463
  • A-9-14.jpg
    A-9-14.jpg
    50.4 KB · Views: 402

Maveric

Fight for yor Right!
Joined
Jan 14, 2007
Messages
2,034
Reaction score
441
Do you know the Company designation for the A.9? N... ?
 

Abraham Gubler

ACCESS: Top Secret
Senior Member
Joined
Mar 18, 2008
Messages
3,549
Reaction score
320
The Northrop AX design appears to align with the Northrop pusher aircraft patent (http://www.google.com/patents/about?id=l5opAAAAEBAJ). There was another patent (http://www.google.com/patents/about?id=02t1AAAAEBAJ) of a very similar aircraft. Perhaps the second design (forward cockpit, pictured bellow) lacks the 30mm Avenger and is a more conventional COIN aircraft design?
 

Attachments

  • Northrop_1970_COIN_Pusher.png
    Northrop_1970_COIN_Pusher.png
    31.3 KB · Views: 782

Abraham Gubler

ACCESS: Top Secret
Senior Member
Joined
Mar 18, 2008
Messages
3,549
Reaction score
320
overscan said:
Indeed - both patents were already posted in this topic :)

That's where I found them! But I couldn't understand why two pusher designs of very similar aerodynamic configuration at the same time? At first I thought the forward cockpit design might be a larger more powerful aircraft?

The picture and data of the Northrop pusher shows from the A-10 study shows where the 30mm Avenger gun and ammo and the engines would be located. The difference between this pusher and the other pusher would appear to be the later central mounted engines and forward cockpit. Indicating the removal of the Avenger gun system and reconfiguration of the weights in the fuselage to compensate.
 

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
Yes, that is possible.

D218856 - filed June 30th 1969 - mentions it was designed under the USAF AX study contract.
D218858 - filed June 30th 1969 - no mention of contract

Both designs were filed almost 2 years after the studies. It is therefore possible the second design is a later development.
 

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
Found a tiny image of the Northrop pusher design on WMOF website.

http://www.wmof.com/Serria%20Sue.html
 

Attachments

  • Serria Sue_02.jpg
    Serria Sue_02.jpg
    38.4 KB · Views: 3,044

Skybolt

ACCESS: Top Secret
Senior Member
Joined
Jun 14, 2006
Messages
2,295
Reaction score
214
Maybe these help... B)
 

Attachments

  • AX_1.gif
    AX_1.gif
    88 KB · Views: 1,231
  • AX_2-copy.gif
    AX_2-copy.gif
    87.5 KB · Views: 1,450

Abraham Gubler

ACCESS: Top Secret
Senior Member
Joined
Mar 18, 2008
Messages
3,549
Reaction score
320
Well its clear from Skybolt's drawing that both Northrop pusher patents are AX aircraft armed with the 30mm Avenger. It would appear they just refined the design.
 

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
YA-9A walkaround by forum member Bill Spidle.

http://www.primeportal.net/hangar/bill_spidle/ya-9a_walk_1.htm
 

Attachments

  • YA-9A_71-1368_20031112_032.jpg
    YA-9A_71-1368_20031112_032.jpg
    81 KB · Views: 269
  • YA-9A_71-1368_20031112_015.jpg
    YA-9A_71-1368_20031112_015.jpg
    116.5 KB · Views: 220
  • YA-9A_71-1368_20031112_008.jpg
    YA-9A_71-1368_20031112_008.jpg
    124 KB · Views: 245
  • YA-9A_71-1368_20031112_002.jpg
    YA-9A_71-1368_20031112_002.jpg
    98.5 KB · Views: 299

overscan (PaulMM)

Administrator
Staff member
Joined
Dec 27, 2005
Messages
13,684
Reaction score
7,988
1967 Northrop AX model tested in NASA 7 X 10-Foot High Speed Tunnel.

Unfortunately, a poor scan.

http://crgis.ndc.nasa.gov/mw/images/b/ba/1967_McKinney_%26_Fox_Close_Air_Support_%28A-X%29_Airplane_Model.pdf


[Photos removed - better versions below - Admin]
 

Attachments

  • NorthropAXModel_1.jpg
    NorthropAXModel_1.jpg
    136.3 KB · Views: 488
  • NorthropAXModel_2.jpg
    NorthropAXModel_2.jpg
    168.9 KB · Views: 330
  • NorthropAXModel_3.jpg
    NorthropAXModel_3.jpg
    93.7 KB · Views: 215
  • NorthropAXModel_4.jpg
    NorthropAXModel_4.jpg
    119.8 KB · Views: 231

Stargazer2006

ACCESS: USAP
Senior Member
Joined
Jun 25, 2009
Messages
13,221
Reaction score
858
Evaluation of the Acme Sierra as the Northrop Turbo-Pusher in the same period seems to make more sense suddenly...
 

Attachments

  • acme.jpg
    acme.jpg
    40.6 KB · Views: 440

Similar threads

Top