Transport helicopter design by American Helicopter Co.

boxkite

ACCESS: Top Secret
Senior Member
Joined
Jul 12, 2006
Messages
860
Reaction score
201
Around the time American Helicopter Co. was bought by Fairchild (April 1954), the company worked on a transport helo for the US Army (payload 3 tonnes). At the tips of the four rotor blades have to be so-called 'power packages' (pulso jets).

What happened to this design? Any idea of the model number?

SOURCE: aero 5/1954 (scan from a Xerox copy :( )
 

Attachments

  • American Helicopter Company.JPG
    American Helicopter Company.JPG
    286.8 KB · Views: 682

frank

ACCESS: Top Secret
Joined
May 20, 2006
Messages
617
Reaction score
20
Pulse jets or ram jets? I can't see a helo using pulse jets. They have enough vibration as it is.
 

boxkite

ACCESS: Top Secret
Senior Member
Joined
Jul 12, 2006
Messages
860
Reaction score
201
The writer of the article says pulse jets ('Pulsodüsentriebwerke') - ???
 

hesham

ACCESS: USAP
Senior Member
Joined
May 26, 2006
Messages
28,145
Reaction score
5,665
My dear boxkite,

The logically series to this company made that helicopter as A-9,
but I am not sure.
 

lark

ACCESS: Top Secret
Senior Member
Joined
Feb 17, 2006
Messages
1,812
Reaction score
114
Boxkite,
The same illustration as yours appeared in Air Pictorial ,June 1954.
Caption as follows:
An American Helicopter (Fairchild) concept for a 8.000 lb payload military
helicopter to meet U.S.Army TransportationCorps requirements.
"Offical support" has been received for a complete preliminary designs study
and development of suitable pulse-jet powerplants.

So far the text.Nothing of a designation.Maybe its only an early concept illustration.
'Helicopters and Autogiro's of the World' , Paul Lambermont & Anthony Pirie- Cassel .London 1958
does not mention this designs in the American Helicopter Company type list.
 

boxkite

ACCESS: Top Secret
Senior Member
Joined
Jul 12, 2006
Messages
860
Reaction score
201
So far the text.Nothing of a designation.Maybe its only an early concept illustration.
'Helicopters and Autogiro's of the World' , Paul Lambermont & Anthony Pirie- Cassel .London 1958
does not mention this designs in the American Helicopter Company type list.

... and that's a really good book. Highly recommended for helicopter enthusiasts! The 2nd revised & enlarged edition was published in 1970, but I believe there is no further edition.
 

lark

ACCESS: Top Secret
Senior Member
Joined
Feb 17, 2006
Messages
1,812
Reaction score
114
Boxkite victor... the honour is yours ;)
 

Stargazer2006

ACCESS: USAP
Senior Member
Joined
Jun 25, 2009
Messages
13,226
Reaction score
767
boxkite said:
Around the time American Helicopter Co. was bought by Fairchild (April 1954), the company worked on a transport helo for the US Army (payload 3 tonnes). At the tips of the four rotor blades have to be so-called 'power packages' (pulso jets).

What happened to this design? Any idea of the model number?

SOURCE: aero 5/1954 (scan from a Xerox copy :( )

This image depicts the American Helicopter/Fairchild M-175 "Transporter" design.


Perhaps this topic could be merged with http://www.secretprojects.co.uk/forum/index.php?topic=6758.0 ??
 

circle-5

ACCESS: Top Secret
Top Contributor
Senior Member
Joined
May 31, 2009
Messages
1,159
Reaction score
204
A better copy of this illustration by R.G. Smith, along with press release text.
 

Attachments

  • Fairchild Helicrane 2.jpg
    Fairchild Helicrane 2.jpg
    259.4 KB · Views: 494
  • Fairchild Helicrane 1.jpg
    Fairchild Helicrane 1.jpg
    76.8 KB · Views: 447

Stargazer2006

ACCESS: USAP
Senior Member
Joined
Jun 25, 2009
Messages
13,226
Reaction score
767
Excellent! Thanks for sharing. Tell me something: where did you get the name "Helicrane" from, circle-5? It doesn't appear on the picture or the press release. Thanks for your answer!
 

circle-5

ACCESS: Top Secret
Top Contributor
Senior Member
Joined
May 31, 2009
Messages
1,159
Reaction score
204
Stargazer2006 said:
Excellent! Thanks for sharing. Tell me something: where did you get the name "Helicrane" from, circle-5? It doesn't appear on the picture or the press release. Thanks for your answer!

I don't know. It was listed under that name in my files, but that doesn't mean much. I just don't remember, so ignore the name until it can be corroborated by another source.
 

Grey Havoc

ACCESS: USAP
Senior Member
Joined
Oct 9, 2009
Messages
16,001
Reaction score
5,592
From the decade involved, and given what's known about the design, I'd suspect that they were planning to use so-called 'valveless' pulse jets, which can be both quite compact and pretty fuel efficient (especially in comparison to most pulse jets, then or now).
 

hesham

ACCESS: USAP
Senior Member
Joined
May 26, 2006
Messages
28,145
Reaction score
5,665
Stargazer2006 said:
boxkite said:
Around the time American Helicopter Co. was bought by Fairchild (April 1954), the company worked on a transport helo for the US Army (payload 3 tonnes). At the tips of the four rotor blades have to be so-called 'power packages' (pulso jets).

What happened to this design? Any idea of the model number?

SOURCE: aero 5/1954 (scan from a Xerox copy :( )

This image depicts the American Helicopter/Fairchild M-175 "Transporter" design.


Perhaps this topic could be merged with http://www.secretprojects.co.uk/forum/index.php?topic=6758.0 ??

It is not correct;

that's because,the Model-175 has a tail-rotor,three main blades,slender
body and single pilot.
 

Jemiba

Moderator
Staff member
Top Contributor
Senior Member
Joined
Mar 11, 2006
Messages
8,316
Reaction score
1,388

Attachments

  • AHC_Model-175_01.jpg
    AHC_Model-175_01.jpg
    55.9 KB · Views: 210
  • AHC_Model-175_02.jpg
    AHC_Model-175_02.jpg
    140.6 KB · Views: 203

hesham

ACCESS: USAP
Senior Member
Joined
May 26, 2006
Messages
28,145
Reaction score
5,665
hesham said:
Stargazer2006 said:
boxkite said:
that's because,the Model-175 has a tail-rotor,three main blades,slender
body and single pilot.


Yes my dear Jemiba,


and the Model-159A had a one rotor blade,Model-159B had a twin engined mounted at the fuselage
and Model-159C had a one rotor blade on each wing and can be folded at forward flight.
 

Stargazer2006

ACCESS: USAP
Senior Member
Joined
Jun 25, 2009
Messages
13,226
Reaction score
767
Where the heck did you get the Model 159 from, hesham? The 159 was a projected stowable rotor convertiplane, but the only type I see discussed here is the Model 175...
 

Jemiba

Moderator
Staff member
Top Contributor
Senior Member
Joined
Mar 11, 2006
Messages
8,316
Reaction score
1,388
Indeed, calling the Model 159 a "transport hlicopter" probably would mean stretching that term quite far. It was
a proposal as a response to a request by the Air Material Command from 1950 and probably meant as a kind of
proof-of concept demonstrator. The number of crew isn't mentioned in the vertiflite article, but with a gross weight
of just 1,360 kg, empty weight of 960 kg and fuel load of 360 kg, its transport capacity would have hardly been
noteworthy ! ;)

BTW, as we still have no general thread about projects drawn by the American Helicopter Company, I think, we should
modify this threads title.
 

Attachments

  • AHC_mod-159_02.jpg
    AHC_mod-159_02.jpg
    53.6 KB · Views: 271
  • AHC_mod-159_01.jpg
    AHC_mod-159_01.jpg
    86.4 KB · Views: 276

hesham

ACCESS: USAP
Senior Member
Joined
May 26, 2006
Messages
28,145
Reaction score
5,665
Hi,


I repeat the same drawings which sent by my dear Jens to M-159,but from
anther source and more clearance.
 

Attachments

  • American Helicopter Company Model 159 (pic 01).GIF
    American Helicopter Company Model 159 (pic 01).GIF
    79.8 KB · Views: 196
  • American Helicopter Company Model 159 (pic 02).GIF
    American Helicopter Company Model 159 (pic 02).GIF
    44.4 KB · Views: 190
  • American Helicopter Company Model 159 (pic 03 different layout).GIF
    American Helicopter Company Model 159 (pic 03 different layout).GIF
    138.1 KB · Views: 182

Stargazer2006

ACCESS: USAP
Senior Member
Joined
Jun 25, 2009
Messages
13,226
Reaction score
767

Attachments

  • American Helicopter Model 175 cutaway profile.jpg
    American Helicopter Model 175 cutaway profile.jpg
    186.4 KB · Views: 52
  • American Helicopter Model 175 illustration.jpg
    American Helicopter Model 175 illustration.jpg
    553.9 KB · Views: 71

Similar threads

Top