Sikorsky models and designations

[hesham]

From Aero Digest 1926,

what was this ?.

 

[Stargazer]

From Aero Digest 1926,

what was this ?.

I shared this one elsewhere on the forum a few years ago, it's the Airco Messenger.
It was a smaller, four-seat version of the S-34 with two 120hp Super-Rhône engines and a simplified retractable gear. It was designed by Igor Sikorsky for the Aircraft Corp. of America (Airco), advertised in 1926, but not built.

 

[Stargazer]

By the way, Airco was to act as selling agents for Sikorsky Manufacturing Corp., but the deal fell through.
Since the Airco "Messenger" was not pursued by Sikorsky, it didn't get an "S-" designation.
The Airco "Amphibian", of course, became the S-34.

 

[hesham]

Hi,

S-77 was a design study for a Sikorsky variant

Helicopter Innovation Era – Igor I Sikorsky Historical Archives

sikorskyarchives.com

 

[hesham]

Also,the S-13 and S-14

The Russian Years – Igor I Sikorsky Historical Archives

sikorskyarchives.com

 

[hesham]

The S-94

Four Score at Sikorsky – Part 4: 2000 to 2020 – Igor I Sikorsky Historical Archives

sikorskyarchives.com

 

[Stargazer]

The S-94

Nice!

S-98: Advanced Commercial Rotorcraft
Source: https://www.linkedin.com/in/michael-devita-29275513/

S-90: mentioned in RAND report but possibly a typo.

Most of the key components of the CH-53X have been demonstrated, or are in production, including the engine (V-22), rotor and blades (S-90), and transmission (MI-26).

https://www.rand.org/content/dam/rand/pubs/documented_briefings/2005/RAND_DB472.pdf

"S-96": several sites use that designation for VIP Helibus helicopters used by oil and gas companies transporting workers between locations, but it seems these are just typos for S-92.

 

[Stargazer]

Got another one, although it's only hinted at in the fake registration:

S-104: HEX Tilt-wing two-rotor Hybrid Electric Demonstrator

 

[Maveric]

Nice!

S-98: Advanced Commercial Rotorcraft
Source: https://www.linkedin.com/in/michael-devita-29275513/

S-90: mentioned in RAND report but possibly a typo.

https://www.rand.org/content/dam/rand/pubs/documented_briefings/2005/RAND_DB472.pdf

"S-96": several sites use that designation for VIP Helibus helicopters used by oil and gas companies transporting workers between locations, but it seems these are just typos for S-92.

Is there a picture or a drawing of the S.98?

 

[Stargazer]

Is there a picture or a drawing of the S.98?

Unfortunately there is none! And since it was a 2010-2011 program we've never heard of, chances are it is now defunct and no pictures are likely to appear...

 

[Stargazer]

I'm surprised to have found a mysterious Sikorsky aircraft type that I had never noticed before in the FAA listings...

Sikorsky Aircraft Corp. SZ 338B

• N382SB, MSN 0001
  Certificate Issue Date Oct 31, 2013
  Mode S Code (base 8 / oct) 51062112
  Mode S Code (base 16 / hex) A4644A
  Cancel Date 03/13/2018
  Reason For Cancellation Expiration
  Export To None
  Type Registration Corporation
  
  
• N385SB, MSN 0002
  Certificate Issue Date Nov 1, 2013
  Mode S Code (base 8 / oct) 51067557
  Mode S Code (base 16 / hex) A46F6F
  Cancel Date 03/13/2018
  Reason For Cancellation Expiration
  Export To None
  Type Registration Corporation

Another online source gives a more detailed account, which clearly gives it as a fixed-wing aircraft!

• Aircraft: SIKORSKY SZ 338B (Category: Land, Engines: 2, Seats: 2, Weight: Up to 12,499 Pounds), Engine: Turbo-shaft
  N-Number: 382SB, N382SB, N-382SB, Serial Number: 0001, Certificate Issue Date: 10/31/2013
  Registrant (Corporation): Sikorsky Aircraft Corp, C/O John Zottola Mail Stop S212a / 6900 Main St, Stratford, CT 06614
  Deregistered: Cancel Date: 03/13/2018
  
  
• Aircraft: SIKORSKY SZ 338B (Category: Land, Engines: 2, Seats: 2, Weight: Up to 12,499 Pounds), Engine: Turbo-shaft
  N-Number: 385SB, N385SB, N-385SB, Serial Number: 0002, Certificate Issue Date: 11/01/2013
  Registrant (Corporation): Sikorsky Aircraft Corp, C/O John Zottola / 6900 Main St Msc S212a, Stratford, CT 06614
  Deregistered: Cancel Date: 03/13/2018

Source: https://www.city-data.com/aircraft/air-Stratford-Connecticut.html

My first thought was that "SZ 338B" could be related to the S330/S333 helicopters. Yet it couldn't be the Firefly electric demonstrator, since it was a single-engine, single-seater... And why "SZ" when the other former Schweizer models used a simple "S" designations?
Then another detail caught my eye: the letters "SB" at the end of both registrations, as in "Sikorsky Boeing". Could these registrations have been reserved (and not used) for the SB-1 Defiant? All the details correspond: two turboshaft engines, two seats...
However, the site AviationDB, which gives even more detail, claims that the SZ 338B was a "Fixed wing multi engine type"...
although Sikorsky hasn't built fixed-wing aircraft for over 80 years!

AviationDB - Aviation Database - Aircraft N382SB

My best bet is that these two aircraft were never completed, despite the regs being reserved for them, but that doesn't make them any less mysterious! Ideas, anyone?