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Author Topic: US Bombers  (Read 62777 times)

Offline elmayerle

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Re: US Bombers
« Reply #15 on: July 31, 2006, 10:12:37 pm »
North American Aircraft 1934-1998 Volume 1
Norm Avery
ISBN 0-913322-05-9

North American Model NA-98X Super Strafer

Early in 1944, the USAAF requested NA for an advanced B-25 development powered with Pratt&Whitney R-2800-51 engines and specially suited for the high speed strafer role with the eight gun nose.

In the book, we can find this radical 400 mph low-altitude attacker with tandem Allison V-3420 and a developed B-25H that led to the NA-98X

Acording to te text, we learn taht B-25H 43-4406 was modified to act as a prototype and was flown on March 31, 1944 but crashed on April 24, 1944 and program was cancelled.


I have to wonder if these designs were part of the design evolution from the B-25 to the XB-28.

Offline pometablava

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Re: US Bombers
« Reply #16 on: August 01, 2006, 05:15:06 am »
Quote
I have to wonder if these designs were part of the design evolution from the B-25 to the XB-28.

I think the XB-28 was intended for the high altitude bomber role while the NA-98 was a low altitude bomber. In my opinion they are two different lines evolving from a common ancestor

Offline Matej

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Re: US Bombers
« Reply #17 on: August 18, 2006, 02:44:46 am »
And here is the third picture of Martin XB-16  ;) My picture is the original XB-16 proposal (model 145-A) from late 1934. It looked much like Junkers Ju-90 and the USAAF was interested mainly because they were going to use four Allison V-1710 engines. But performances were too low, so prototype was not ordered.

Wingspan: 42,7 m
Lenght: 25,6 m
Height: 6 m
Empty weight: 14 510 kg
Take off weight: 29 510 kg
Armament: 1135 kg of bombs
Speed: 195 km/h
Range: 8100 km (without weapons up to 9980 km)
Maximal Endurance: 42 hrs
Maximal altitude: 6860 m

Martin engineers decided to build something more impressive, which can defend against gigantic XB-15 and XB-19. So they completely redesigned the plane. It had double tail, six engines and improved performances. It didnt interested USAAF too.

Wingspan: 52,7 m
Lenght: 35 m
Empty weight: 23 000 kg
Take-off weight: 47 620 kg
Max. speed: 415 km/h
Normal speed with weapons: 225 km/h
Range: 5300 km

Final version was direct competitor to XB-17. It had once again four unspecified engines (two push, two pull), V tail, some progressive ideas as blended wing/fuselage etc. It was also not realized.

Source: L+K, January/05, pg. 59


Bizarre aviation expert.

Offline pometablava

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Re: US Bombers
« Reply #18 on: August 26, 2006, 09:04:41 am »
Liberator evolution design.

Pics courtesy of Lark ;)
Dear Friend, do you remember the sorce?

Thanks in advance

Offline lark

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Re: US Bombers
« Reply #19 on: August 26, 2006, 10:47:15 am »
Here it is:

"The B-24 Liberator- A Pictorial History"
Allan G.Blue , Ian Allan , London,1979
page:198

"SeeYou...

Offline pometablava

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Re: US Bombers
« Reply #20 on: September 21, 2006, 01:04:59 pm »
B-36 Leggenda e realtÓ by Pietro Gianvanni. Italian mag JP-4

XB-35
Early XB-36 configuration
Deffinitive XB-36

Offline Skybolt

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Re: US Bombers
« Reply #21 on: September 22, 2006, 01:31:39 am »
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B-36 Leggenda e realtÓ by Pietro Gianvanni. Italian mag JP-4

Taken directly from the AAHS Journal B-36 articles...  ::)
But Pietro is an hero in the little Italian aviation history community, so he's forgiven  ;D

Offline smurf

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Re: US Bombers
« Reply #22 on: September 22, 2006, 02:08:19 am »
Quote
Are you sure of the titles for the 2 pictures you posted above as
 (twin-boom) Martin XB-16?
But see Walt Boyne in Airpower Sept 1972 and the thread 'Unknown American Aircraft Projects'

Offline lark

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Re: US Bombers
« Reply #23 on: September 22, 2006, 09:40:57 am »
.... in basic concept, it most nearly resembles the first offering of the stillborn Martin XB-16 with its tractor /pusher arrangements and twinboom configuration....

So far text by Walt Boyne.

Offline hesham

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Re: US Bombers
« Reply #24 on: March 18, 2007, 10:10:45 am »
Hi,

Again about Martin bomber projects;

XB-16 Model-145A was four engined heavy bomber and XB-16A Model-145B
was six engined heavy bomber.
XB-33 Model-189 was twin engined medium bomber and XB-33A Model-190
was four engined medium bomber.
« Last Edit: July 08, 2010, 04:29:20 am by hesham »

Offline hesham

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Re: US Bombers
« Reply #25 on: March 18, 2007, 10:29:03 am »
Hi,

A Model for Douglas XB-31.

Offline hesham

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Re: US Bombers
« Reply #26 on: March 19, 2007, 10:01:56 am »
Hi,

The Northrop N-45 was ERB-35B and N-48 was EB-35B.

Offline hesham

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Re: US Bombers
« Reply #27 on: March 23, 2007, 11:56:28 am »
Hi,

The Burnelli A-1 bomber project which involved in a competition led
to develope Martin B-26.
And The Burnelli X-BAB-3 attack bomber project which involved in
a competition led to develope Douglas A-20.

Offline lark

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Re: US Bombers
« Reply #28 on: March 23, 2007, 01:08:23 pm »
A bit rectification...

The Burnelli A-1 project was intended for the 1935 Army AirCorps
competition won by the Douglas B-18 .

Source: Burnelli's bombers by Dave Ostrowki-Skyways No.34 April1995

Offline hesham

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Re: US Bombers
« Reply #29 on: March 28, 2007, 10:34:53 am »
Hi,

I heard about a competition for medium attack bomber,the main contenders were
Martin A-22,Stearman A-21,Bell Model-9,Douglas DB-7 and Northamerican Na.40,
was that anther contenders in this competition ?.