Thread 64145943

Postan' some pics, hopefully some discussion

AVX initially submitted this for FVL and then FARA,
>230 kn speed (cruise? never exceed?), at which point 40% of the lift comes from the small fixed wings
>27,000lb weight (gross? dry?) / 12,000lb external carrying capacity
>twice the internal volume of the Black Hawk
>twin ducted fans, not for performance, but for safety

This was from when they were still thinking about retiring the Kiowa

>>64145943 (OP)
>>64145965
I like the idea of a tiltrotor better because at least if you get hit and go down you're not necessarily completely fucked since you are literally a plane and are more likely to glide forward rather than spin uncontrollably into the terrain

Honestly they should just disregard the main rotor entirely and give the aircraft 4 ducted fans instead that are much bigger and can rotate. Heli rotors just kinda suck and limit what you can do with a heli a fuckton

>>64145987
I'm a big tiltrotor advocate but they aren't really designed for that. Tiltrotor lifting surfaces (V-22 as a case study) are very small, and they would have space shuttle-tier glide ratios. The V-22 can't autorotate well either because the rotors are rather lightweight. Tiltrotors can't really do unpowered landings well, if at all, in most cases.
Tiltwings would probably do this much better, but at the cost of more difficult and dangerous vertical landings.

NUCLEAR OPTION UPDATE WHEN????

Helicopters still have their place - they’re more maneuverable, can be much smaller, and can function as flying Humvees essentially. But Bell’s entry into FLRAA created a whole new category of tactical aviation that the Army simply couldn't pass up.
We probably won't see oversized tactical transport quad tiltrotors until the technology is mature enough to ensure C-130-level safety and reliability.

>>64146013
The AVX designs are more reminiscent of the helicopters from the Deus Ex prequels, or maybe the Ka-25.

>>64145987
>because at least if you get hit and go down you're not necessarily completely fucked
yeah you are, the wings aren't big enough to glide and the proprotors aren't big enough to autorotate
and if only one engine fails you're fucked again

>>64146034
You're only fucked if the engine failure is uncontained or if it affects the rotors or drive shaft. The V-22's and V-280's engines are linked to a central driveshaft, so either engine can drive both rotors.

scale mockup

>>64146011
>. The V-22 can't autorotate well either because the rotors are rather lightweight.
it's not that they're light but they are short stubby 'proprotors' to allow them to act as flying propellars
these proprotors cant produce lift autorotating like a helicopters rotors

>>64146011
The V-280 is way lighter than the V-22. The military learned from their mistake. 75% of the V-22's problems came from the insane disc loading because she was a fat bitch, it put a ton of stress on the aircraft, the other 25% from the pivoting engines.

>>64146034
The V-22 can't, but that's not true for every tiltrotor plus the wings would slow falling aircraft down a lot. It's a joint effort between the dying rotors, aerodynamic bottom, and straight 90 degree wings mounted as high in the aircraft as possible

>>64146065
Yeah, the V-22 would typically 'autorotate' - or more accurately crash land using residual rotor energy - in forward flight.

>>64146078
>plus the wings would slow falling aircraft down a lot.
V-22 wings aren't big enough to glide

>>64146084
The Valor's are

>one more fan and it would make it.
The fans are too far from the center, if one is out the other just make it spin. Maybe contrarotating propellers don't mind that, but its has its own issue of making the whole thing tall.

>>64146300
Man. With all due respect to the SB-1 team, but they fucked this one up badly, many of its features are at odds with each other. Inherently slower due to no fixed wings, fuckhueg gearbox for a pusherprop that probably made it only like 50 knots faster. The rigid rotor is cool, but I'm not sure if it was appropriate for a helicopter like this.

>>64145943 (OP)
I know an engineer that worked on the Sikorsky S-97 Raider years ago, they were about to push though retreating blade stall and reach blade mach as the limiting factor.
I know nothing about the AVX but what I heard about the S-97 sold me on the concept.

Flying corruption plus tip

>>64145943 (OP)
>230 kn speed (cruise? never exceed?), at which point 40% of the lift comes from the small fixed wings

what the fuck

>>64146447
How? It wasn't picked.
>>64146458
It's optimistic, but that's slower than the Eurocopter X3

>>64146532
>X3
Don't do this. We aren't your furry ERP discord.

>>64146565
:3 uwu

>>64146573
Seems like you need some.... correction.......

>>64146565
so mean >~<

>>64146584
You too. >>64146581

>>64146377
It was appropriately size on s 97 raider. Engineer probably overdo the size of the rotor.
Now that im thinking. Maybe a chinook with large wing and propellers would work.

at grok is this real

>>64147062
No fucking way. I bought this game last week and barely touched it, I had no idea the dev is this redpilled.

>>64146300
>if one is out the other just make it spin.
Fans are for economic fast cruise. If one fan is down pilots just desingage fans clutch and fly it like conventional helicopter.

>>64145990
>No time to explain, hop in.

>>64147211
kek

>>64147062
Oh damn, the update is out already?

>>64147670
No. Dev stream footage

>>64146377
Unfortunately, the rigid rotor is a hard requirement for ABC, because that's the only way to fix the retreating blade stall problem that limits helo speeds: put the coaxial rotors so close together that aerodynamically they act almost like the same wing. At that distance, any flex at all can be fatal.

The advantage of tilts is that they can ignore retreating blade stall altogether, and transfer lift production to the fixed wing.

>>64146445
There's nothing fundamentally wrong with ABC; it's a great idea. It just wasn't implemented well with SB-1 and its massive gearbox, and I heard a few rumors that the rotors still potentially had some flex issues, which is a hard pass until those can be completely solved.

>>64147062
Buying

>>64147062
What game is this?

>>64147062
Stop posting Nuclear Option on /k/

What is the difference between ABC and what Kamov is using?

>>64148155
Ah the dragonfly, too pure for this world, it can only survive in the realm of vidya games.

>>64145965
made a dual main rotors sorta like a Phrog, but with main rotors separated enough to not overlap. Add two smaller rotors on either side, so its got full Quad Rotor control in hover.

Now for the crazy part! :) Make the fuselage a flying wing when the whole thing rotates as a unit for semi-high speed horizontal flight, and the main rotor blades would stop turning and feather into wings.

Haven't figured out how to make the fuselage a practical shape for dealing with cargo etc on the ground.

>>64147062
FUCKING WHEN?

>>64145972
Isn't the point of keeping the sights above the rotors so they can see more while exposing less of themselves though? This feels kinda like a downgrade in that regard.

>>64147062
PALA investing in K&N air filters I see

>>64146078
>aerodynamic bottom
Are you trying to woo me anon?

>>64149053
There weren't trees in Afghanistan. This lets you straight down, which is more important in valleys and such. AFAIK the Kiowa mast was designed for A-10 and Fulda gap-tier ROE where you were supposed to fly low and use the optics for far away targets and your eyeballs for close ones. Not viable anymore.

>>64148155
>>64148500
You know, Sikorsky should combine the wings and turbofans from the S-72 and the coaxial rigid rotors from the S-97/SB-1. 300 kn easily.