Cessna Helicopter projects

[hesham]

Hi,

I have this old picture from Internet to unknown helicopter
from Cessna,does anyone know it ?.

 

[flateric]

My friend! Google is a wonderful thing. Typing two words Cessna and Kinedyne will give you link to great article of Cessna CH-1 by Steve Remington (CollectAir)
http://www.commercemarketplace.com/home/CollectAir/cessna.html or, the new site at http://www.collectair.com/cessna.html

"Cessna "Kinedyne" proposal. Following the unsuccessful 1961 bid for the LOH contract, the helicopter R&D efforts went into a replacement for the aging Army L-19 liason aircraft. A sort-of autogiro, the "Kinedyne", was proposed in 1962. This machine was turbine powered, had counter-rotating props for thrust and used a heavy, high inertia rotor which could be run-up for takeoff and would have adequate energy for near-hover landings. The trademark rotor system of the CH-1 was not evident as a completely different rotor was envisioned. Directional control in-flight was obtained by a rudder-like surface while directional control in the low-speed flight regime was gained by use of a torque control unit clutched to the main rotor. In hindsight, this proposed aircraft does not appear to be a very practical machine with far too many complexities for a two-place observation craft."

BTW, article worth reading to all - this great example of facts, graphics and interesting story mix. As well as all the other site.

 

[Jemiba]

Great site indeed, thank you !
The Kinedyne wasn't the only proosal for an autogiro by Cessna.
This one was shown in an Aviation-Week article in 1961 :

 

[hesham]

Thank you my dears,

and that was the site which I saw it here;
http://www.collectair.com/cessna.html

 

[Tophe]

A long time ago, dear Jemiba posted this picture. Does somebody know if it would have been roadable or not?
(I prepare a second question about the propeller diameter)

 

[Tophe]

According to my calculations, modelisation, the propeller rotating would break the booms apart. How could this be?

 

[Matej]

A bit cheap, but generally correct answer: how could *this* be?

The keyword is "drawing". It seems that it is the drawing that represents the general idea, not all the details and technical solutions. Also note that at least I cant see there any shaft from the engine to the rotor.

 

[Tophe]

Thanks Matej, I had not noticed the window at the rear of the cockpit, with no shaft there nor below the rotor.
Well, I imagine a solution: in fact the engine and propeller axis were one or two feet higher, with a direct (almost horizontal) link to the rotor, and just the blade tips needed a hole to rotate freely thus lateral booms. The artist made it wrong, but maybe more pretty, this is art... No?

 

[martinbayer]

As an autogyro, it wouldn't need a shaft to power the rotor: http://en.wikipedia.org/wiki/Autogyro

Martin

 

[Tophe]

Yes, you are right, thanks Martin, only the propeller circle remains as mystery

 

[Stargazer]

Though it would be a bit corny, there is another possibility: the propeller at the back tilts underneath the fuselage when in the air, working as an counter-rotating rotor. When landing, it stops and tilts back between the booms...

 

[Tophe]

Your idea is fascinating, yes! ???
While... I doubt the length is big enough for the blade above to go down without breaking the tailplane, or even the boom/tail contact if the blade is set at 45° (or 60°) before the moving occurs.
But this looks like brainstorming for us. Very pleasant, thanks a lot! ;D

 

[Stargazer]

The Cessna Kynedyne project of 1958 was designated CH-3 by Cessna.
There was also a Kynedyne 2 project that same year, presumably studied under the same basic designation.

The CH-4 was Cessna's own entry for the U.S. Army's LOH program, a CH-1C with an Allison 250 engine mounted behind the rear passenger seat.
Attached pictures show the three-view arrangement, a photograph of the full-scale mock-up on the tarmac, and a fake promotional in-flight photograph, presumably retouched from the previous one.

 

[Stargazer]

There is no indication as to what the CH-2 might have been. Perhaps the project shown above in Jemiba's post? Or maybe the one attached here?

 

[Stingray]

Also see here for the helicopter projects:
http://www.secretprojects.co.uk/forum/index.php/topic,2672.msg21526/topicseen.html#msg21526

 

[hesham]

I have this old picture from Internet to unknown helicopter
from Cessna,does anyone know it ?.

The Cessna Kinedyne,page 152;

http://kulturserver-nds.de/home/hubtest/medien/Neg.Nr.GUN.pdf

 

[hesham]

Hi,

http://www.redbackaviation.com/air-progress-1962-helicopters/

 

[hesham]

Here are some more Cessna projects, shown in Aviation Week 11/1961.
Sorry for the bad quality, the white line drawings on black background
were hard to scan.

In Bernard Collection,the Kinedyne was also called at first CH-2 as early concept,so may
it was one those,which my dear Jemiba shared them.

From Aeroplane 1961.

 

[Stargazer]

In Bernard Collection,the Kinedyne was also called at first CH-2 as early concept

I have verified just to make sure, and there is absolutely NO reference to a "CH-2" in the Bernard Lindenbaum collection. All it says is that one of the Kinedyne projects was the "Kinedyne 2". Stop inventing designations!

 

[Stargazer]

Here is the list of all known Cessna helicopters produced.
As you'll notice, two aircraft are missing to make the list complete.
Were they also MAP exports? Does anyone know? I haven't been able to trace them.

​

 

[hesham]

Nice work,and may they are in my book
Collections,but I am in a journey now,I
Have Airlife's book about helicopters
With serial numbers

 

[hesham]

By the way,

the 45518 was also allocated to CH-1C,but the variant is not known.