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Author Topic: Gyrodyne projects  (Read 22479 times)

Offline Maveric

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Re: Gyrodyne projects
« Reply #30 on: February 13, 2016, 12:06:06 pm »
Why G.C.A.5? I cant find any designation...
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Offline hesham

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Offline Maveric

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Re: Gyrodyne projects
« Reply #32 on: February 13, 2016, 02:38:35 pm »
 ;) ;) ;)
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Offline Jos Heyman

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Re: Gyrodyne projects
« Reply #33 on: February 13, 2016, 05:04:00 pm »
Hesham, perhaps in future you could post the images and associated text at the same time.
Having said that, Gyrodyne seems to have had a lot of this sort of wonderful helicopters, or whatever you like to call them. A long time ago I picked up the models GCA-5 and GCA-15as being connected with an alternative of the McDonnell XV-1. You posted a picture of that on 15 December 2006 and on 25 August 2008 you identified it as GCA-33. No idea what is right. With the proliferation of pictures and information in separate reference sources, we got to be careful that we do not make decisions by linking picture to a model number, unless, as with your GCA-5 pictures/quotes, they come from the same reference source.
What I am saying, until we see a picture of the convertiplane you posted on 15 December 2006 with a caption identifying it as GCA-15 or GCA-33, and from a source from that period, we cannot be sure.
But keep up the good work. We now got GCA-5 identified, thanks to you.   
« Last Edit: February 13, 2016, 05:16:30 pm by Jos Heyman »

Offline hesham

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Re: Gyrodyne projects
« Reply #34 on: February 14, 2016, 04:14:36 am »
My dear Jos,

of course I depend on a realistic source,there is old book about helicopter,I have some
pages from it,and I don't know GCA.15,and about GCA.32,you will find it exactly as in
the drawing,the description is too close.

Offline boxkite

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Re: Gyrodyne projects
« Reply #35 on: March 11, 2016, 11:38:20 am »
...

the Gyrodyne GCA.33,it was two seat light helicopter,this project
called for two two-bladed coaxial contra-rotating rotors powered
by one 150 hp Lycoming engine,estimated speed 121 km/h and
range 193 km.

Here is a picture of the GCA-33 display model from another angle of view.

Source: American Helicopter Magazine Dec 1954 (p16)

Offline boxkite

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Re: Gyrodyne projects
« Reply #36 on: March 11, 2016, 11:39:54 am »
From the same magazine: Gyrodyne GCA-29


Offline hesham

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Re: Gyrodyne projects
« Reply #37 on: March 11, 2016, 01:12:37 pm »
Wow,amazing Project my dear Boxkite.

Offline Skyblazer

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Re: Gyrodyne projects
« Reply #38 on: May 25, 2016, 09:12:51 am »
A long time ago I picked up the models GCA-5 and GCA-15as being connected with an alternative of the McDonnell XV-1. You posted a picture of that on 15 December 2006 and on 25 August 2008 you identified it as GCA-33. No idea what is right. With the proliferation of pictures and information in separate reference sources, we got to be careful that we do not make decisions by linking picture to a model number, unless, as with your GCA-5 pictures/quotes, they come from the same reference source.
What I am saying, until we see a picture of the convertiplane you posted on 15 December 2006 with a caption identifying it as GCA-15 or GCA-33, and from a source from that period, we cannot be sure.

  • The GCA-33 is properly identified in at least two sources as being the small coaxial-rotor helicopter with square fins and uncovered rear fuselage.


  • The GCA-5 is definitely the small helicopter that hesham posted recently. It is confirmed in several sources as that three-seat military project with four-blade rotor.


  • The convertiplane type that resembles the XV-1 poses a problem indeed. It appears in a 1954 Design Patent (#172,712) by D.F. Gebhard exactly as it appears in the photos of the model. It has previously been identified as the "GCA-32", but if we are to believe the description in hesham's book excerpt, the GCA-32 had two four-blade rotors (while our convertiplane obviously had two-blade ones) and "airscrews" ("our" convertiplane only has one). And so quite clearly it's not the GCA-32... Your notion that both the GCA-5 and GCA-15 designations were associated to that program is probably the result of a typo at some point and it's probably just GCA-15 that is correct.



  • As for the real GCA-32, I have quite a few pics of Gyrodyne projects, but none of them matches the description so far...
« Last Edit: May 25, 2016, 09:20:20 am by Skyblazer »

Offline hesham

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Re: Gyrodyne projects
« Reply #39 on: May 25, 2016, 09:28:06 am »
Good analysis,and maybe that's correct,GCA.15.

Offline hesham

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Re: Gyrodyne projects
« Reply #40 on: February 24, 2017, 01:42:21 pm »
Hi,

a two helicopter Projects from Gyrodyne,one of them was an UAV.

http://www.aviodyne.com/ROTORCYCLE.html

Offline hesham

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Re: Gyrodyne projects
« Reply #41 on: February 25, 2017, 04:23:12 am »
a two helicopter Projects from Gyrodyne,one of them was an UAV.

http://www.aviodyne.com/ROTORCYCLE.html

Was that any Gyrodyne designation (GCA) wright on this drawing ?.

Offline hesham

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Offline Maveric

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Re: Gyrodyne projects
« Reply #43 on: October 22, 2018, 12:49:09 am »
GCA.24 ? the pics say Model 21...
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Offline hesham

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Re: Gyrodyne projects
« Reply #44 on: October 22, 2018, 06:14:26 am »
GCA.24 ? the pics say Model 21...

Please see reply # 8,and here is GCA.35.