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Search: Posts Made By: SplineDrive
Showing results 1 to 35 of 62
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Forum: Rotorheads
4th May 2022, 02:28
Replies: 444
Views: 155,680
Posted By SplineDrive

The defense industry (both fixed and rotary wing)...

The defense industry (both fixed and rotary wing) needs to get away from "make or break" contracts that only come out every 20-30 years. Companies need to get into the habit of developing new...
Forum: Rotorheads
22nd Apr 2022, 22:47
Replies: 444
Views: 155,680
Posted By SplineDrive

What happens to Boeing Vertol is a good question,...

What happens to Boeing Vertol is a good question, though I imagine they can make consistent money off supporting the AH-64 and CH-47 fleets for another generation and perhaps they have something...
Forum: Rotorheads
21st Apr 2022, 17:21
Replies: 444
Views: 155,680
Posted By SplineDrive

John, for what it’s worth, the V-280 video...

John, for what it’s worth, the V-280 video appears to show a 45 degree yaw maneuver in about 2 seconds, so ~22 deg/sec (I didn’t do a frame by frame level analysis). Based on the table Sans also...
Forum: Rotorheads
20th Apr 2022, 18:25
Replies: 444
Views: 155,680
Posted By SplineDrive

I haven’t seen rate, phase delay, etc. data for...

I haven’t seen rate, phase delay, etc. data for V-280’s maneuverability, just statements that low speed agility testing met level 1 handling qualities. Not sure if that’s ADS-33E or more along the...
Forum: Rotorheads
20th Apr 2022, 12:46
Replies: 444
Views: 155,680
Posted By SplineDrive

Well, the DoD should have more information at...

Well, the DoD should have more information at hand than the Sikorsky executive non-speak in that Warzone article.
Forum: Rotorheads
20th Apr 2022, 11:25
Replies: 444
Views: 155,680
Posted By SplineDrive

https://www.army.mil/article/252221/army_experimen...

https://www.army.mil/article/252221/army_experimental_test_pilots_fly_sb1_defiant

Army XPs flew Defiant late last year, or is this the "non-company person" piloting an X2 you're referring to?
Forum: Rotorheads
18th Apr 2022, 18:35
Replies: 444
Views: 155,680
Posted By SplineDrive

Ah, yes, the oh so objective fluff piece from a...

Ah, yes, the oh so objective fluff piece from a Sikorsky Corporate Fellow.
Forum: Rotorheads
18th Apr 2022, 14:40
Replies: 444
Views: 155,680
Posted By SplineDrive

You must not have seen the “hide-and-go-seek”...

You must not have seen the “hide-and-go-seek” video of the XV-15 playing with a OH-58 at below tree levels, at times with her belly in the grass. The tiltrotor platform can certainly perform NOE...
Forum: Rotorheads
17th Apr 2022, 16:40
Replies: 444
Views: 155,680
Posted By SplineDrive

Let's be honest here... if a tilt rotor had won a...

Let's be honest here... if a tilt rotor had won a down select for LHX, it in all likelihood would have been late, overweight, too expensive, and ultimately canceled as well. The Boeing-Sikorsky team...
Forum: Rotorheads
17th Apr 2022, 16:35
Replies: 444
Views: 155,680
Posted By SplineDrive

This is an excellent point and I'm sure the...

This is an excellent point and I'm sure the success of UTTAS and AAH helped convince the Army to pursue competitive demonstrators and actively iterate on the requirements of a final FLRAA program to...
Forum: Rotorheads
16th Apr 2022, 21:07
Replies: 444
Views: 155,680
Posted By SplineDrive

Agreed. Will definitely be interesting to see how...

Agreed. Will definitely be interesting to see how Bell's 360 performs when the engine is ready and if the Army is willing to wait around for Raider-X to fly. Bell's public photos show a main rotor...
Forum: Rotorheads
16th Apr 2022, 20:08
Replies: 444
Views: 155,680
Posted By SplineDrive

I'm saying both 360 and Raider-X are going to...

I'm saying both 360 and Raider-X are going to struggle with weight when the Army wants a turreted cannon, internal carriage of 8 missiles, higher than normal speeds, a single engine, and a relatively...
Forum: Rotorheads
16th Apr 2022, 19:33
Replies: 444
Views: 155,680
Posted By SplineDrive

When a helicopter likely to have weight problems...

When a helicopter likely to have weight problems (hence the "not compatible with the laws of physics quote") goes through a significant design change, it's a fair bet that the change either reduces...
Forum: Rotorheads
13th Apr 2022, 23:16
Replies: 444
Views: 155,680
Posted By SplineDrive

No, Comanche had a conventional turreted cannon...

No, Comanche had a conventional turreted cannon that did have the unique feature of being able to swivel towards the tail for stowage in a reduced RCS configuration. So it could fly 100 knots...
Forum: Rotorheads
13th Apr 2022, 22:29
Replies: 444
Views: 155,680
Posted By SplineDrive

My understanding is that the current thinking is...

My understanding is that the current thinking is RAH-66 was over-specified and/or over-capable in terms of maneuvering capabilities, particularly in yaw and that ADS-33 requirements are getting...
Forum: Rotorheads
6th Oct 2021, 21:20
Replies: 444
Views: 155,680
Posted By SplineDrive

I’m usually content to let people carry on in...

I’m usually content to let people carry on in pissing contests, but thought I’d add for the record that Bell flew a ducted tail rotor on the Model 222 and the Model 407, so has that flight test data...
Forum: Rotorheads
11th Sep 2021, 20:49
Replies: 444
Views: 155,680
Posted By SplineDrive

If there is any sanity in this world, this RFP...

If there is any sanity in this world, this RFP submission is the beginning of the end of the ABC concept.
Forum: Rotorheads
12th Jun 2021, 19:19
Replies: 444
Views: 155,680
Posted By SplineDrive

The FLRAA program speed requirements have indeed...

The FLRAA program speed requirements have indeed been lowered in addition to lots of other requirements changes over the last year... this doesn't change the fact that SB>1 had a design Vh much...
Forum: Rotorheads
28th May 2021, 20:17
Replies: 444
Views: 155,680
Posted By SplineDrive

Wider fuselage also means more of the rear prop...

Wider fuselage also means more of the rear prop is occluded and not all the airflow entering the prop from the fuselage is going to be very predictable. Perhaps this is part of the speed deficit of...
Forum: Rotorheads
21st May 2021, 19:59
Replies: 444
Views: 155,680
Posted By SplineDrive

Defiant-X definitely has a lower cruise...

Defiant-X definitely has a lower cruise efficiency (L/De) than V-280 but actual fuel consumed also depends on cruise speed and engine SFC, etc. They appear to have been successful in talking down the...
Forum: Rotorheads
12th May 2021, 23:32
Replies: 444
Views: 155,680
Posted By SplineDrive

. Check out Commander Cody’s earlier...

.

Check out Commander Cody’s earlier post[/QUOTE]

And since Sikorsky hasn’t released a rotor diameter, here is a top down photo of SB>1 and an H-60 for visual comparison. There’s a difference...
Forum: Rotorheads
12th May 2021, 00:21
Replies: 444
Views: 155,680
Posted By SplineDrive

“It is fast but that’s it.” Hmm… well, let’s see,...

“It is fast but that’s it.” Hmm… well, let’s see, compared to the V-22, V-280 is smaller, has much lower disk loading, has increased low speed agility (meets the Army requirements for a tactical...
Forum: Rotorheads
22nd Mar 2021, 12:12
Replies: 444
Views: 155,680
Posted By SplineDrive

I think the Army sees keeping both V-280 and SB>1...

I think the Army sees keeping both V-280 and SB>1 funded during the current concept development and risk reduction phases as political cover and investment to make sure no one can protest that it...
Forum: Rotorheads
9th Mar 2021, 20:50
Replies: 444
Views: 155,680
Posted By SplineDrive

So, according to FlightRadar24, V-280 (N280BH) is...

So, according to FlightRadar24, V-280 (N280BH) is back in flight status having gone out for flights a couple of times this month. Still nothing on SB>1 (N100FV). Are there even any rumors that...
Forum: Rotorheads
25th Jan 2021, 17:11
Replies: 444
Views: 155,680
Posted By SplineDrive

Looking back at this thread, there were some...

Looking back at this thread, there were some flights between summer (20 hrs) and October (23 hrs), and a few more at the December (26 hrs) articles. None in Jan so far. So it’s not quite as bad as...
Forum: Rotorheads
6th Jan 2021, 12:01
Replies: 444
Views: 155,680
Posted By SplineDrive

Both FLRAA competitors have agility requirements...

Both FLRAA competitors have agility requirements at the LZ similar to the UH-60 platform and the V-280 has demonstrated that capability. It also has the ability to rapidly drop from cruise to LZ and...
Forum: Rotorheads
1st Jan 2021, 13:48
Replies: 444
Views: 155,680
Posted By SplineDrive

Well, I was too optimistic when it came to...

Well, I was too optimistic when it came to predictions of last quarter progress for SB>1. I’m sure they’ll declare success if they ever reach 230 knots, but success should be measured against the...
Forum: Rotorheads
27th Nov 2020, 14:48
Replies: 444
Views: 155,680
Posted By SplineDrive

I guess “imminent” is longer than three months.

I guess “imminent” is longer than three months.
Forum: Rotorheads
18th Oct 2020, 23:13
Replies: 444
Views: 155,680
Posted By SplineDrive

Put me down for another press release in...

Put me down for another press release in mid-December highlighting the hundreds of ground turn hours accumulated on the test beds and "thousands" of hours of simulations in various integration labs...
Forum: Rotorheads
18th Oct 2020, 04:14
Replies: 444
Views: 155,680
Posted By SplineDrive

i read 23 hours in one of this week’s articles.

i read 23 hours in one of this week’s articles.
Forum: Rotorheads
17th Oct 2020, 16:33
Replies: 444
Views: 155,680
Posted By SplineDrive

It doesn't and to Lockheed's credit, I don't...

It doesn't and to Lockheed's credit, I don't think they have officially claimed it does, but some journalists have gotten "excited" about the 232 knot value.
Forum: Rotorheads
15th Oct 2020, 17:32
Replies: 444
Views: 155,680
Posted By SplineDrive

I don’t really think the data from press releases...

I don’t really think the data from press releases is sufficient to build any sort of credible speed-power polar, even for trash-talking purposes. The time required to advance another 6 knots is a...
Forum: Rotorheads
30th Sep 2020, 16:55
Replies: 444
Views: 155,680
Posted By SplineDrive

Honestly, other than that Sikorsky press/media...

Honestly, other than that Sikorsky press/media day, I can’t find an official looking requirement for 230 knots. Everything I can find says 250 knots as a threshold speed and 280 knots as objective....
Forum: Rotorheads
3rd Sep 2020, 19:07
Replies: 444
Views: 155,680
Posted By SplineDrive

53 knots below Raider’s target speed w/o...

53 knots below Raider’s target speed w/o pylons/weapons installed, but an important milestone for Sikorsky. Thanks for the link.
Forum: Rotorheads
3rd Sep 2020, 04:20
Replies: 444
Views: 155,680
Posted By SplineDrive

For a 4 bladed rotor system, 4P blade loads...

For a 4 bladed rotor system, 4P blade loads create 4P vertical shears at the hub. 3P and 5P blade loads get converted to 4P vibratory moments in the fixed system. Depending on where particular blade...
Showing results 1 to 35 of 62
 
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