Sikorsky VSTOL/STOL Projects

overscan said:
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That image corresponds one of the not built variants of the XH-59.
Here an outline of the possible developments of the XH-59 proposed by Sikorsky and that they would share the same group propeller.
(source: " Interavia " 9/1980)
 

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Here is a picture showed CARA of US.
The VTOL aircraft fitted with retractable Roto on dalso and tail for VTOL, while needing level fly, the roto will autometically retracte and stored in airframe for reducing drag. The power mianly rely on one Jet and fan engine each side.
 

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Here the S-57 looks more then a "flying pancake", than as a delta, as it was shown
for example in FlugWelt I/60 :
Nevertheless an interesting design ! Slightly OT, was their ever a single blade rotorcraft,
that actually took to the air ?
 

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Couldn't find any other drawings of this design, so I had a quick attempt for
a simple drawing on my own. Problem, due to lack of sufficient informations
is the fuselage width and shape, I used the XH-59 and S-72 as a pattern.
So, careful please, speculative guesswork only !
I've attached the cdr-file (zipped), too, so those of you, who have CorelDraw,
or another software, that can handle such files, can make corrections on their
own ! ;)
 

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Jemiba said:
Couldn't find any other drawings of this design, so I had a quick attempt for
a simple drawing on my own. Problem, due to lack of sufficient informations
is the fuselage width and shape, I used the XH-59 and S-72 as a pattern.
So, careful please, speculative guesswork only !
I've attached the cdr-file (zipped), too, so those of you, who have CorelDraw,
or another software, that can handle such files, can make corrections on their
own ! ;)
Click to expand...

Excellent work!! Just what I needed. What size did you use? I have calculated the main rotor of the "CH-44B" from the earlier posted link as being about 17 meters (56 ft) in diamater (this based on the size of the Marine at the rear of the rotorcraft.
 
Assuming that the drawings of the ABC concepts are at least roughly to the
same scale, the fuselage length would be nearly identical to the XH-59A,
that means 40' 9" ( 12,4m ). Rotor diameter seems to be larger, around 40' 8"
( 13,6m ), compared to 36' ( 11m) for the XH-59.
 
A couple of unidentified projects from RAF Flight Revue 1962 issue.
 

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pometablava said:
A couple of unidentified projects from RAF Flight Revue 1962 issue.
Click to expand...

You mean "RAF Flying Review", right? ;)
 
Pome, the lower aircraft is your posted image appears to be a modified Grumman Mohawk, or at least to use the fuselage and tail of one...


cheers,
Robin.
 
Hi,


here is a two Sikorsky agility tilt-propeller and tilt-wing ground attack light aircraft V/STOL
projects,and a winged helicopter.


[font=verdana, arial, helvetica, sans-serif]http://arc.aiaa.org/doi/abs/10.2514/3.43593[/font]
 

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Hi,


here is a Sikorsky Tri-Service tilt-wing aircraft and a fan-in-wing VTOL aircraft projects.
 

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And;
 

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hesham said:
Hi,
from Sikorskyarchives,you can find a group of V/STOL and VTOL aircraft,some are
known for us and some are new.
Click to expand...

Please define "us". All these designs have been seen before as far as I'm concerned.

You don't have to feel obliged to include others in your posts. Saying "Some of these designs are new to me" is enough...
 
Hi,

http://archive.aviationweek.com/image/spread/19630701/40/2
 

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Hi,

http://archive.aviationweek.com/image/spread/19680624/53/2
 

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rousseau said:
Here is a picture showed CARA of US.
The VTOL aircraft fitted with retractable Roto on dalso and tail for VTOL, while needing level fly, the roto will autometically retracte and stored in airframe for reducing drag. The power mianly rely on one Jet and fan engine each side.
Click to expand...

From Aviation magazine Inter. 1969.
 

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From Aviation Week 1965,

a clearer view to Sikorsky Stowed Rotor Project ?.
 

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From Aviation Week 1965.
 

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From Vertiflite 1959,

here is a Sikorsky Project,called; Pod Mounted Lift Fan V/STOL
aircraft.
 

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Last edited:
The coaxial compound has been a hallmark effort of Sikorsky for several decades.
 
yasotay said:
The coaxial compound has been a hallmark effort of Sikorsky for several decades.
Click to expand...

Yes, at least since the XCH-59. But the specific one above, you could remove the side engines and you'd almost have a Raider.
 
You would notice that the weapons bay has since migrated on each side of the airframe instead of the moderately useful ventral position.
 
TomcatViP said:
You would notice that the weapons bay has since migrated on each side of the airframe instead of the moderately useful ventral position.
Click to expand...

Different types of weapons. This aircraft would be armed mainly with torpedoes, so they need to be able to drop free. Side bays are for forward-firing missiles on rails.
 
Well, many helicopters carry their torpedoes and buoys on their flanks. Loading weapons when you have no room to cram underside is not very efficient.
 
TomcatViP said:
Well, many helicopters carry their torpedoes and buoys on their flanks. Loading weapons when you have no room to cram underside is not very efficient.
Click to expand...

The weapons still have to be able to drop vertically, and this design doesn't have a place to do that from the sides of the fuselage. You don't want to hang torpedoes out in the airstream on a high-speed aircraft if you can help it--that's bad for drag and hard on the weapons.

Clearly, a lot would depend on how the landing gear are arranged here -- there needs to be enough height under the fuselage for the bay doors to open, and that should be enough to slide a low-profile weapon trolley in from the front or rear for loading.
 

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