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Sikorsky SB-1 flies for first time

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Sikorsky SB-1 flies for first time

Old 7th May 2019, 14:01
  #61 (permalink)  
 
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Originally Posted by PAXboy
the Osprey is not a runaway success
Actually, it is quite successful and doing well. I invite you to check the calendar. The year is 2019, not 1999. They've gotten through that rough bit (which had some dark times) about introducing new tech. I also suggest you look at V-280 Valor and think about how the future looks for tilt rotor. (Looks pretty good ...)

The coaxial rotor design concept isn't all that new. Kamov had two maritime helicopters that were serviceable (Helix/Hormone) but the trick they are going for in SB1 is to add the high speed flight end of the game to that basic idea. As noted above, that was tried 40 years ago with varying issues arising.
With a lot of new tech available, they can try again with greater hopes for success. They are also doing the crawl, walk, run thing: X2, S-97, now SB1.
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Old 7th May 2019, 14:28
  #62 (permalink)  
 
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Pax,

Marines continue to set the pace.

US Marine Corps (USMC) Lieutenant General Steven Rudder, deputy commandant for aviation, is confident that a tiltrotor can meet the service’s minimum cruise speed goal of 270kt (500km/h) for its Future Long Range Assault Aircraft (FLRAA).

The USMC plans to piggyback on the US Army-run FLRAA programme, though it wants a next-generation utility rotorcraft with even more capability than the US Army is asking, in particular the ability to cruise at least 270kt, which is the cruise speed of the Bell Boeing V-22.
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Old 10th Jun 2019, 13:14
  #63 (permalink)  
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Coming Up on Three Months Since First Flight

Almost three months have past since the Defiantís First Flight. Any flight test updates? Not unusual for a new aircraft to be down for a month following First Flight. But three months?
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Old 12th Jun 2019, 14:34
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Originally Posted by CTR View Post
Almost three months have past since the Defiantís First Flight. Any flight test updates? Not unusual for a new aircraft to be down for a month following First Flight. But three months?
As with Raider, flight test is progressing glacially. As of a couple weeks ago, supposedly SB-1 had completed its 3rd flight , hovering to 150 ft and 10 kts air taxi.

Raider has actually been flying since mid last year, demoing in secret at the request of the Army while also testing numerous desperate attempts to fix its gargantuan vibration issues. SB1 may be going down the same path as it (amazingly) did not incorporate many lessons learned from S-97.
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Old 12th Jun 2019, 18:10
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Have to wonder, is there a plan B for Lockheed/ Sikorsky? If the coax rotor does not scale as expected, what is their fallback?
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Old 12th Jun 2019, 19:21
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Originally Posted by etudiant View Post
Have to wonder, is there a plan B for Lockheed/ Sikorsky? If the coax rotor does not scale as expected, what is their fallback?
I would imagine a much more vocal propaganda push about how ITEP will make UH-60 and AH-64 perfectly suitable moving forward, and that FVL is an expensive wholly unnecessary endeavour.
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Old 13th Jun 2019, 02:08
  #67 (permalink)  
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Originally Posted by etudiant View Post
Have to wonder, is there a plan B for Lockheed/ Sikorsky? If the coax rotor does not scale as expected, what is their fallback?
Make Textron a impossible to turn down offer for Bell. Before Boeing beats them to it.
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Old 16th Jun 2019, 21:32
  #68 (permalink)  
 
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From FG:

The compound co-axial rotor design flew for the first time in March, and has since made just two additional sorties, putting it well behind the rival Bell V-280 tiltrotor, which took to the air in December 2017.
From Sikorsky:

"We were hoping that we would be flying more," says Dan Schultz, president of Sikorsky.

Initial delays were caused by a third party that is producing a gearbox component, and the airframer is now working to catch up on the schedule slip.

Controls, transmission and rotor design have been validated by the flights so far, says Schultz, with "minimal vibration" detected.
So only three flights in three months confirmed. Appears they havenít done anything beyond hover and very low speed. If this is the case nothing of the design has been validated and the vibration claim is no better than saying it is smooth while being towed. These kind of statements are the type made trying to keep LM from pulling the plug on funding. (Remember LM is on the V-280 where they have already seen the full capabilities of the aircraft and their products demonstrated to a timeline set back in 2015.)



Last edited by The Sultan; 16th Jun 2019 at 21:44.
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Old 21st Aug 2019, 16:13
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So, another couple months and more deafening silence from the Defiant team. Has anyone heard any news?

Upon successful PSTB endurance envelop expansion, we expect to be positioned to quickly expand the aircraft flight envelope later this summer
Only 4 weeks of summer left...
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Old 21st Aug 2019, 21:08
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Originally Posted by SansAnhedral View Post
So, another couple months and more deafening silence from the Defiant team. Has anyone heard any news?



Only 4 weeks of summer left...
Perhaps the prop hasnít been engaged to full power yet... when it does, youíll hear that beast in the next state 🤣
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Old 22nd Aug 2019, 15:23
  #71 (permalink)  
 
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Originally Posted by SplineDrive View Post
Perhaps the prop hasnít been engaged to full power yet... when it does, youíll hear that beast in the next state 🤣
According to a member of their design team I spoke with, the tail pusher is the 2nd most powerful single propeller assembly ever put on an aircraft.
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Old 8th Sep 2019, 23:52
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Where Was SB-1 During Dorian

A good measure of the program is posed by the question of where the SB-1 was as hurricane Dorian was being projected to hit its base at Jupiter, Florida?

1. Did they fly it out? It has been five months since first flight and, by Sikorsky’s statements, well into envelope expansion by August.
2. Trucked it out? Embarrassing but may have been necessary if still not safe to fly.
3. Left in hanger, or maybe on ramp, in hopes of a direct hit which would allow them to end the program without more data to reinforce the obvious fact that the concept is a bust?
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Old 9th Sep 2019, 04:25
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Originally Posted by The Sultan View Post
A good measure of the program is posed by the question of where the SB-1 was as hurricane Dorian was being projected to hit its base at Jupiter, Florida?

1. Did they fly it out? It has been five months since first flight and, by Sikorskyís statements, well into envelope expansion by August.
2. Trucked it out? Embarrassing but may have been necessary if still not safe to fly.
3. Left in hanger, or maybe on ramp, in hopes of a direct hit which would allow them to end the program without more data to reinforce the obvious fact that the concept is a bust?
The facility isnít close enough to the ocean for a storm surge to cause a loss, but high winds and a hanger door left open could generate an insurance check... not a great return on investment but better than nothing 🤣 In any case, the storm veered northward and wasnít an issue.
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Old 9th Sep 2019, 15:35
  #74 (permalink)  
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No SB-1 Updates on Flight Test Status for Five Months?

No one out there with any intel on they can share on SB-1 flight test status?

I would assume any aircraft flights into FAA controlled air space would be public knowledge. Does lack of any information on flights into public air space infer that there have been no flights other than low level hovering within airport property?
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Old 9th Sep 2019, 20:00
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I would assume any aircraft flights into FAA controlled air space would be public knowledge.
Why would you assume that? They have their own radar feed, their own chase aircraft, and for VFR flights are not required to file a flight plan.
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Old 9th Sep 2019, 20:52
  #76 (permalink)  
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Originally Posted by IFMU View Post
Why would you assume that? They have their own radar feed, their own chase aircraft, and for VFR flights are not required to file a flight plan.
ADS-B. The V-280 and itís chase aircraft were required to carry ADS-B. Plus both the SB-1 and V-280 aircraft required FAA registration and FAA safety of flight clearance.

Last edited by CTR; 9th Sep 2019 at 21:19.
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Old 16th Sep 2019, 20:11
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Originally Posted by CTR View Post
ADS-B. The V-280 and itís chase aircraft were required to carry ADS-B. Plus both the SB-1 and V-280 aircraft required FAA registration and FAA safety of flight clearance.
Indeed, N100FV's Mode-S 24 bit address code is A00545
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Old 20th Sep 2019, 17:27
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From Flightglobal:

The US Marine Corps issued a request for information for its Attack Utility Replacement Aircraft (AURA) programme, formally launching its search for a rotorcraft to succeed the Vietnam War-era Bell UH-1 utility and AH-1 attack helicopters.
The requirements are for a 295 kts cruise with a combat radius of over 400 miles which exceeds the latest FLRAA spec. Submission of responses are by Jan 2020. The question is will Boeing stick with the SB-1 (which by Sikorsky’s last press release has yet to reach 15 kts), make an independent response, or beg Bell to let them partner on Bell’s 280 based response?

Would expect some indication by AUSA in mid-October.
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Old 20th Sep 2019, 18:23
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That's a pretty weird article, about these *Vietnam War-era Bell UH-1 utility and AH-1 attack helicopters*
The AH-1W was, for example, hardly "Viet Nam era" given it's two T-700 engines and improved weapons systems.

The Marines now have the UH-1Y and AH-1Z that are not "Viet Nam Era" - they reflect a considerable improvement to the state of the art of the Huey/Cobra line.

Granted, the Marines looking long term at the next big change in attack helicopter capability to match their Ospreys makes sense, in terms of being able to keep up with the V-22's.
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Old 22nd Sep 2019, 03:36
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Haven't seen the actual RFI document yet. Responses to some sections are due Nov. 22 and responses to other sections are due Jan. 1. Be interesting to see if they get any proposals for innovative propulsion/aero concepts that meet their objectives and truly merit funding. Giving serious funding to small companies to rapidly develop innovative concepts applicable to AURA objectives is also a good way to keep the existing JMR/FVL teams on their toes.
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