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Boeing-Sikorsky SB>1 Defiant (Model S-100)

sferrin

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The Verticalmag article states the the SB-1 hit 205 knots after 18 flight hours in 15 months from first flight.

The only points of comparison I have is Eurocopter’s X3, which hit 232 knots after ~15 fight hours in 9 months, and Sikorsky’s own X2, which hit 235 knots after 14 flight hours in 24 months. So the SB-1 progress is still fairly slow.
Interesting analysis, thank you. I have to wonder though how much the change of corporate headquarters has had to do with the lethargic progress. Very soon after Lockheed Martin (with no recent rotorcraft experience) took ownership of Sikorsky, the S-97 Raider hard landing occurred. With F-35 front and center, I doubt the rotorcraft programs are getting anywhere near equal time.

At least from my tiny corner of the big picture LM has been hands off, at least as far as CH-53K goes.
 

yasotay

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I think the hands off approach has been okay for CH53K. It is a more mature program with a relatively low threat technology ( compared to S-97 and SB>1.) Also LMCO has had a working relationship with the USMC. I imagine between nervous investors and a notoriously bad business partner in the US Army they might be reluctant to jump into the briar patch.
 

Moose

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The Defiant team has unveiled their official pitch for FLRAA: Defiant-X.

The changes from the SB>1 include an exhaust system configured to reduce the aircraft's IR signature and, perhaps surprisingly, a return to the tricycle landing gear seen in the original X-2 concepts from Sikorsky.
 

TomcatViP

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Two points:
- Landing gear: the CG has probably migrated forward
- exhaust: see point above and IMOHO exploiting the mixing flows effect of the propeller (aggravated by the tail LERX).
 

Moose

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