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-   -   Boeing FARA (https://www.pprune.org/rotorheads/630050-boeing-fara.html)

chopper2004 26th Feb 2020 08:42

Boeing FARA
 
Boeing is going to reveal their entry to Future Attack Recon Aircraft

https://www.boeing.com/defense/FARA/...efense#/videos

cheers

Nige321 26th Feb 2020 12:08

https://cimg8.ibsrv.net/gimg/pprune....c28f53b221.jpg
https://cimg9.ibsrv.net/gimg/pprune....f54dcb2fe3.jpg

Lonewolf_50 26th Feb 2020 12:23

I see a six bladed head.
I see (I think) a tail rotor.
I see (I think) one engine.
I see the kind of open/fold internal-to-external weapons stations that were on Comanche.
I wonder: is this machine being made by Boeing Philly or Boeing Mesa?
Lastly: I wonder if they'll take the leap to LHX and build a single pilot (at last) scout helicopter.

The Sultan 26th Feb 2020 14:14

Or Bell. Looks like the Invictus.

CTR 26th Feb 2020 18:21

+Four Blade Pusher Propeller
 
Latest Boeing FARA video on same site now shows a 4 blade pusher propeller, like the Lockheed Cheyenne. But no wing.....

Lonewolf_50 27th Feb 2020 01:21

For CTR:
I finally looked at all of the videos, and yeah, I see what you are talking about.

For Sultan:
What are you talking about?
Are you telling us that Bell and Boeing are in partnership on FARA, or are you just foaming at the mouth again?

OnePerRev 27th Feb 2020 03:01

Slats in the Beanie?

The Sultan 27th Feb 2020 04:51

LW wrote:

For Sultan:
What are you talking about?
Are you telling us that Bell and Boeing are in partnership on FARA[/QUOTE]

No. My comment was obviously referring to the fact that it is nearly identical to the Bell offering unveiled 5 or so months ago. Try to keep up.



Lonewolf_50 27th Feb 2020 12:27


Originally Posted by The Sultan (Post 10696941)
No. My comment was obviously referring to the fact that it is nearly identical to the Bell offering unveiled 5 or so months ago. Try to keep up.

You will note that I commented on the Invictus thread shortly after it was posted (and I like it).
Your incoherece is at least consistent.
Iif you bother to look at all of the concept art provided in detail: no, not identical.
This one's concept art also has a pusher prop. (I'd like to see the final thing IRL ... sounds like a complicated beast)
It is not unlikely that differing designs would have a number of similarities, given that they are aiming to meet the same requirements document.
(And Boeing likely still has the files on all of that Comanche development ...)

CTR 27th Feb 2020 12:34

Bell and Boeing’s FARA Offerings Nearly Identical?
 

Originally Posted by The Sultan (Post 10696941)
No. My comment was obviously referring to the fact that it is nearly identical to the Bell offering unveiled 5 or so months ago. Try to keep up.

Sultan,

Take a close look again at the Boeing offering for FARA. You may also wish to edit your response to LF.

Boeing has six main rotor blades to Bell’s four.

Boeing has what appears to be a rigid rotor compared to Bell’s articulated rotor

Boeing has an open anti-torque tail rotor while Bell has a ducted fan.

Most significantly, Boeing has a pusher propeller, while Bell has a wing for high speed flight.

Yes they both have tandem seating and internal weapons carriage on the sides. But so did the Comanche.

Seems like the Army has a broad spectrum of configurations to pick from.


SansAnhedral 27th Feb 2020 15:34

I'm surprised nobody has pointed out how ridiculous it would seem for Boeing to expect to achieve 180 kt cruise with a tall, open, unfaired hub and controls hanging out in the breeze as shown.

Similarly, both the mast diameter and blade roots look extremely paltry for a rigid rotor.

noneofyourbusiness 27th Feb 2020 16:51

Aside from having a pusher prop and a tail rotor, the rest of what is shown probably deliberately disguises details of the design. Partly to keep competitors from taking shots at the design, partly to keep proprietary design hidden as long as possible.

Commando Cody 27th Feb 2020 20:39

Here's an enhanced picture from the video also on Jackonicko's post on the Military Aviation Forum which gives a better view of the tail configuration.

https://cimg2.ibsrv.net/gimg/pprune....067db52ace.png





I wonder if Sikorsky has checked to see if anyone stole any of their Black Hawk tail booms...

SplineDrive 28th Feb 2020 11:31


Originally Posted by SansAnhedral (Post 10697388)
I'm surprised nobody has pointed out how ridiculous it would seem for Boeing to expect to achieve 180 kt cruise with a tall, open, unfaired hub and controls hanging out in the breeze as shown.

Similarly, both the mast diameter and blade roots look extremely paltry for a rigid rotor.

Yeah, the image could be a simplistic cartoon, but I wouldn't make the assumption it has a "rigid" rotor. Lack of a fairing around the swash plate at least is a little odd. The illustrated payload is on the low end of the spec range. I wonder if that's accurate and the've sized the aircraft accordingly, or if they're still hiding a bigger punch. Reports are in, not much point in hiding at this point.

noneofyourbusiness 28th Feb 2020 15:34

From Wikipedia:
"Lockheed designed the Cheyenne as a compound helicopter,
which combines a helicopter with fixed-wing features for increased performance, usually speed. The design included features such as a rigid main rotor, low-mounted wings, and a pusher propeller. Thrust was provided by a pusher propeller at the rear of the aircraft. " Boeing is proposing an advanced Cheyenne, combining a tail rotor with a pusher prop. Bell an advanced Comanche. Sikorsky is not a lock here.

CTR 28th Feb 2020 18:43

The Hidden Cards
 
The hidden cards in this FARA competition are political influence and the military need to maintain the engineering capability of three helicopter manufacturers.

Having recently developed new aircraft, both Sikorsky and Bell both have strong engineering departments capable of clean sheet designs.

Sustaining engineering is far from being able to design a new aircraft from scratch. It has been over a quarter century since Boeing engineering partnered with Sikorsky on the Comanche, and with Bell on the Osprey. Forty five years have past since Boeing (actually Hughes) designed the Apache on their own.

If next month Boeing Vertol does not win the opportunity to design and build a FARA prototype aircraft, I don’t see their future as very promising.

SplineDrive 28th Feb 2020 19:50


Originally Posted by CTR (Post 10698440)
The hidden cards in this FARA competition are political influence and the military need to maintain the engineering capability of three helicopter manufacturers.

Having recently developed new aircraft, both Sikorsky and Bell both have strong engineering departments capable of clean sheet designs.

Sustaining engineering is far from being able to design a new aircraft from scratch. It has been over a quarter century since Boeing engineering partnered with Sikorsky on the Comanche, and with Bell on the Osprey. Forty five years have past since Boeing (actually Hughes) designed the Apache on their own.

If next month Boeing Vertol does not win the opportunity to design and build a FARA prototype aircraft, I don’t see their future as very promising.

I could see Boeing being selected for the reason above and their focus on relative simplicity compared to the coaxial aircraft, and Bell selected based on low risk and demonstrated ability to perform on schedule. Since the two aircraft are taking pieces of the AH-56 arrangement, flying them against each other has complementary knowledge gained for the Army: which is worth the pain of integrating, the wing and increased download or a prop and its increased complexity?

SansAnhedral 28th Feb 2020 19:58


Originally Posted by SplineDrive (Post 10698142)
Yeah, the image could be a simplistic cartoon, but I wouldn't make the assumption it has a "rigid" rotor.

Agreed, that was my point. CTR above put a rigid rotor on the list of Boeing FARA features. I don't see it.


Originally Posted by noneofyourbusiness (Post 10698303)
Boeing is proposing an advanced Cheyenne, combining a tail rotor with a pusher prop. Bell an advanced Comanche.

Except the Cheyenne had a significant size lift offset wing, which the Boeing design clearly does not.

Simply adding thrust power with a pusher prop to an articulated rotor would only be useful if you could keep MR tip speeds manageable, which would be rather tricky without a wing to provide lift at a necessarily slower Nr.

The low quality cartoons also don't lend much confidence to the design maturity. If you're not going to show something robust and marketable, why show anything at all.

Commando Cody 28th Feb 2020 20:42


Originally Posted by CTR (Post 10698440)
Forty five years have past since Boeing (actually Hughes) designed the Apache on their own.

If next month Boeing Vertol does not win the opportunity to design and build a FARA prototype aircraft, I don’t see their future as very promising.

Keep in mind that Boeing has, IIRC, never put a helicopter of their own design into production. The CH-46/47 were designed by Vertol, which was a separate company and were inherited when Boeing bought the company (as with H-6 and AH-64). AFAIK, the only helicopters of their own design that even flew were the three YUH-61 prototypes and one Model 179 (civilian derivative).

Commando Cody 28th Feb 2020 21:10


Originally Posted by SansAnhedral (Post 10698480)
Agreed, that was my point. CTR above put a rigid rotor on the list of Boeing FARA features. I don't see it.



Except the Cheyenne had a significant size lift offset wing, which the Boeing design clearly does not.

Simply adding thrust power with a pusher prop to an articulated rotor would only be useful if you could keep MR tip speeds manageable, which would be rather tricky without a wing to provide lift at a necessarily slower Nr.

The low quality cartoons also don't lend much confidence to the design maturity. If you're not going to show something robust and marketable, why show anything at all.

Part of the thing to keep in mind is that Army's requirements for FARA, including speed, are lower than for FLRAA,. In fact, the speed requirement is lower than that for Cheyenne. Cruise is only required to be 180 knots with faster speeds ~ 200 knots in a "dash". Not sure how much extra credit Army is giving for exceeding threshold and objective. So they're all looking at how much extra performance will be worth in the competition. Bell clearly thinks that the Army is not going to be willing to pay that much for over and above performance so they're going for lower cost/risk. Boeing looks like they feel Army may be willing to pay somewhat more but not a lot more.

Regarding the low quality cartoons, this is just a tease to pique interest. They used to do this when the new car models came out. You see this in movie trailers all the time. In the trailers for the 2014 Godzilla movie (which was actually pretty good) you got flashes of, or saw parts of, but there was never a good shot of Godzilla himself. Boeing says they'll reveal all in March.


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