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  #1  
Old 04-21-2012, 11:03 PM
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Default Early Pitcairn Gyros

Three pictures of early Pitcairn Autogyros
http://www.flickr.com/photos/sdasmar...n/photostream/
http://www.flickr.com/photos/sdasmar...n/photostream/
http://www.flickr.com/photos/sdasmar...n/photostream/

Enjoy!
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Old 04-22-2012, 09:54 AM
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I like those!!! You can really see a lot of detail in the simple construction methods.
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Old 04-23-2012, 10:50 AM
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Albert, did you notice this one?
http://www.rotaryforum.com/forum/sho...let#post413887

You might also like these:
http://www.rotaryforum.com/forum/sho...021#post472021
http://www.rotaryforum.com/forum/sho...ighlight=13908
http://www.rotaryforum.com/forum/sho...let#post413887
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Juergen

..Il semble que la perfection soit atteinte..
....non quand il n'y a plus rien à ajouter,...
...mais quand il n'y a plus rien à retrancher...
- Antoine de Saint-Exupéry -

Last edited by kolibri282; 04-23-2012 at 12:06 PM.
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Old 04-26-2012, 10:02 AM
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Pitcairn PA.38 attack autogyro:


(Info from "Cierva Autogiros: the Development of Rotary Wing Flight",
Peter W. Brooks, Airlife, 1988, page 226)

Quote:
Designation of a series of design studies undertaken for a USAAC design competition (Spec XC-417, circular proposal 40-260), which closed on April 22, 1940. These were of a large jump take-off autogiro of 4,200lbs loaded weight, suitable for military observation or cargo; mail carriage; insecticide-dispensing of forest fire-fighting. Kellett submitted studies of two direct-control designs without jump take-off capability. None of the studies was proceeded with. The Army contract went to Platt-LePage for their XR-1 helicopter.
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Old 04-26-2012, 10:07 AM
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http://www.airventuremuseum.org/coll....asp#TopOfPage

Quote:
The PA-39 was developed to serve as an observation aircraft protecting shipping convoys from submarines. Only seven PA-39s were built for the British Air Ministry, and N3908 is the only remaining example. The others were sunk being shipped to Britain or lost in training and test flight accidents.
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Old 04-26-2012, 01:50 PM
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Pitcairn PA-44 (XO-61/YO-61) twin-boom observation aircraft:

The design was submitted by Pitcairn at a time when the company was operating as the Pitcairn-Larsen Autogiro Company (circa late 1940). The aircraft was ordered in 1941 by U.S.A.A.F. from the A.G.A. Aviation Corporation, a company which had since taken over the activities of the former Pitcairn Autogiro Company.

http://ntrs.nasa.gov/archive/nasa/ca...2008020986.pdf

Info from "Cierva Autogiros: The Development of the Rotary-Wing Flight" Peter W. Brooks, Smithsonian Institution Press, 1988:

Quote:
Overall length: 28 ft 6 in (8.68 m)
Maximum take-off weight: 3,000-3,038 lb (1,360-1,378 kg)
Maximum speed: 103 mph (165 km/h)
Minimum speed: 29 mph (46 km/h)

Engine:
The 300-325 hp Jacobs R-915A3 (or R-915A-4) engine drove a constant-speed propeller, having a special low-pitch setting for rotor spin-up purposes. This was similar to the PA-39 and had originally been proposed by Paul Stanley when commenting on proposals for jump take-off put forward by Richard Prewitt in 1932.

Rotor diameter and blade section:
The XO-61 was originally designed with a 42 ft (12.8 m) rotor of NACA 230 series section. This was later increased in diameter to 48 ft (14.63 m).

Production:
In addition to one static test airframe, six (later reduced to one (42-13611)), of the type were originally ordered as XO-61, of which five (42-13612/13616) were to be supplied in YO-61 service test form. However, only two aircraft were completed—the first in the spring of 1943—and these were never submitted to the army for acceptance because the contract was canceled before testing had been completed. The cancellation occurred when the second aircraft had reached the flying stage. Neither went into service because of engineering problems (including ground resonance, said to be due to defective shock absorbers, and engine cooling difficulties); manufacturing delays (G. and A. Aircraft were preoccupied with their involvement in the Waco CG-4A Hadrian troop-carrying glider program); and the appearance of the first production helicopters, in the form of the Sikorsky R-4, which entered service early in 1944.

Comment:
The YO-61 represented almost the ultimate in development of the Autogiro concept as it had evolved over the preceeding twenty years. Cancellation of the YO-61 order finally terminated American Autogiro manufacture. Pitcairn had by then built rather more than a hundred Autogiros. Of this number, about twenty were rebuilt from earlier models, as if they were new. Harold Pitcairn progressively withdrew from his aviation interests at this time. However, from 1951 until his death in 1960, he found himself deeply involved in the rotary-wings patents lawsuit against the United States government. He died, accidentally, from a gunshot wound, seventeen years before the lawsuit was finally settled in his favor.
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Old 04-26-2012, 03:18 PM
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-SGTA-3 (Submerged Gas Turbine Autogyro)
-SGTA-5 autogyro
-CFA-3 (Cruise Fan Autigyro) Gyrodyne
-CFA-4 autogyro
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  #8  
Old 05-24-2012, 09:00 PM
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Very nice (and high resolution) picture of Amelia Earhart and her PCA-2. Sitting comfortably on a wheel she gives scale to this pretty massive aircraft.
http://explorepahistory.com/kora/fil...k8w0-a_349.jpg
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Old 11-01-2014, 01:24 AM
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PCA-2 used for banner tow. Wonder whether "Adler Shoes for Men" are still available..;-)
http://collections.si.edu/search/tag...ro&inline=true

Picture from another thread:
http://cabbagingcove.tumblr.com/image/25579274014

Plus links to other Pitcairn threads, I should really have kept stuff in just one thread....sighhh
http://www.rotaryforum.com/forum/showthread.php?t=39714
http://www.rotaryforum.com/forum/showthread.php?t=39535
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..Il semble que la perfection soit atteinte..
....non quand il n'y a plus rien à ajouter,...
...mais quand il n'y a plus rien à retrancher...
- Antoine de Saint-Exupéry -

Last edited by kolibri282; 11-01-2014 at 01:46 AM.
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Old 12-08-2014, 01:29 AM
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High Resolution picture of the PA-18
http://eaavintage.org/wp-content/upl...togiro_rgb.jpg
From here:
http://www.bing.com/images/search?q=...ectedIndex=273
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  #11  
Old 12-11-2014, 09:37 PM
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Quote:
The hardest thing in aerial travel, nowadays, is not to fly, but to get quickly to and from the airport
From here: http://blog.modernmechanix.com/mags/...1/air_docs.jpg
Using autogyros as commuters seemed a good idea back then. How do we convince companies running todays airports to build flat roofs?......


PS: for some reason the link to the original mechanics page is dead

Last edited by kolibri282; 12-11-2014 at 11:20 PM.
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Old 12-20-2014, 07:38 AM
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The picture below is available as a wallpaper here:
http://www.warbirddepot.com/desktop_...bruary2012.asp

Much as I liked the plane I thought the scenery is too cluttered with modern stuff, so I removed a few things and added an inch or so to each side to make it 16:9.

http://www.divshare.com/download/26585776-258


Please note that IMO the modified picture is still copyright Mike Shreeve, so if you want to use it commercially please contact him.
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Juergen

..Il semble que la perfection soit atteinte..
....non quand il n'y a plus rien à ajouter,...
...mais quand il n'y a plus rien à retrancher...
- Antoine de Saint-Exupéry -

Last edited by kolibri282; 03-02-2015 at 01:21 AM.
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  #13  
Old 01-09-2015, 08:45 PM
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I visited this gyro build project, it took my breath away. I wanted so bad, to be a part of the process. After a takeoff attempt, blade flap, and destruction, they came to me for a rotor tach kit. I think you could have counted the blades as they went by.
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Last edited by gyroplanes; 01-09-2015 at 09:06 PM.
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  #14  
Old 01-16-2015, 09:42 AM
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Quote:
they came to me for a rotor tach kit
This is quite interesting, Tom. In his book "The Autogiro: How to fly it" Reginald Brie describes the instruments of a Cierva C-30 and it seems a "Rotor Revolution Indicator" (as he calls it) was standard on the C-30. Does that mean that the PA-18 in its original configuration did not have an rrpm indicator?
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Old 01-26-2015, 10:02 PM
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Some pictures of the PAA-1 from the excellent archive of the San Diego Air & Space Museum
https://www.flickr.com/photos/sdasmarchives/4589949181/
https://www.flickr.com/photos/sdasma...n/photostream/
https://www.flickr.com/photos/sdasma...n/photostream/
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