China's indigenous bomber program

Jeff Head

General
Registered Member
This is slightly off topic but does anyone have some info on the H-6H bombers? Or, if thats not their designation, im talking bout the version with four underwing pylons for cruise missiles. I was under impression that those were older H-6 bombers that have been refurbished but folks at china-defense.com are saying they are in fact newly produced planes, that the whole production line has been restarted. Is that true? If so how many have been delivered and how many more are planned for delivery?
That is the H-6M, which is a PLAN version with four underwing pylons for cruise missiles. Its already in service as I understand it and is a complete new build.

h6_15large.jpg


The latest is the H-6K, which came out this year. It has six pylons for crusie missles, a new wholly glass cockpit, and uses two new Russian engines. Quite a redesign and new build actually meant to extend the life of these aircraft as cruise missile carriers for another 10 or more years.

h6_19large.jpg


Read about it at sinodefence.com. I do not believe it is in service, or maybe not even accepted by the PLA yet.

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SinoDefence said:
The H-6K is the H-6 bomber family’s latest member that first flew on 5 January 2007. This variant features some radical modifications, including six under-wing pylons to carry an unknown model air-launched land-attack cruise missile; two Russian-made D-30KP turbofan engines; a solid nose replacing the original framed glass-in nose; and a completely refurnished ‘glass’ cockpit featuring six large multifunctional displays (MFD). XAC hopes that these modifications would significantly improve the performance of the 40-year-old design, thus extending its service life well into the next decade.
 

Totoro

Major
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Another 'ideal' plaaf bomber. Planeman, you're free to take notice, since you seem to be the leading expert here. :D

Again, wanted to keep it a bit ordinary, doable, perhaps with a certain 70s and 80s design vibe. It probably wouldn't be too stealthy but i've gone with something that chinese aircraft manufacturers would be able to produce within next 5-10 years. Providing adequate engines are there. Supersonic speed is good for chinese needs, as they dont need so much range as they need speedy dashes for antishipping missions. So it'd really be more of a regional bomber than anything else. Still, given its size, some 2500 km combat radius with nominal warload is a minimum design would allow, probably more. Speed wise, about 1.7 mach seems to be the sweet spot, giving good speed yet not screwing up fuel efficiency with engines that'd have to be optimized for higher speeds. Plus variable intakes are not needed for such speeds when one has DSI intakes.

Perhaps the cabin should be a tiny bit smaller, compared to the rest of the plane. Everything else should be in scale. (also havent given much thought to entrance in the cabin. Should it like in su-34?) Two crewmen, side by side seating plus perhaps a resting space behind them.

Vertical tail surfaces are canted inwards as i believe that is a better solution for a bomber type airplane, RCS wise. Smaller planes would have a problem with it due to little space between fins, which isnt such a problem with a large plane. Plus, fighter sized planes do harder turns which expose tails to ground based radars at steeper angles. With little luck, if the bomber doesnt do hard turns, no ground based radar should get a 90 deg mirror return from these tails.

I must say i'm a bit confused about engine intakes. If we use f22 as an example, it would appear that the intakes snake inwards and up (where up??? there seems to be no room) before straightening out again in front of the engine blades. I've seem one diagram where the intakes were drawn asymetrically. First one snakes inwards into the fuselage, then the other one, as there's no room for both at the same point along the length of the plane.

Theoretically, bomb bay could be wider, like in f22, perhaps sporting two additional bays, each on one side of the main bay, at least half a meter in width each. Don't know about the depth of the bays, but again, 0.5 meters, or even 0.6 meters seem very doable.

But lets put those additional bays aside for a moment. The way it is configured now, it should be able to carry 3 tomahawk sized missiles or 3 similarly sized antiship missiles, modeled after Meteor AAM or the new USAF ARM. (mbda has already said they're looking into using the general design of meteor for a variety of missiles)

Alternatively, some 6 of slightly downscaled JSOW like gliders/missiles could fit, as well as 3 or so large, long ranged AAMs.
 

Totoro

Major
VIP Professional
Nice design there as well. Seems to have a certain 80s/90s design going on. F117 meets B1 meets... something. :)

I'm never too sure about over the wing intakes myself, I don't wanna risk using those on my designs. I would assume such planes are not very manouverable in the pitch axis, as we wouldn't want the engines to get deprived of air. (come to think of it, which planes do feature such intakes, save for b2? Are there and fighters?)

You've went with a more LO design, which is definitely better, but i think i'll stick with less advanced solutions at least until i see what LO standard the chinese have achieved with JXX. Hopefully we won't have to wait for many more years. :D

I know it's a quick sketch you did, but have you given any thought to dimensions and other figures? Looks like a 30-35 meters long plane to me. Perhaps something in the tu22 class, weight wise? Probably less...
 

planeman

Senior Member
VIP Professional
For a strategic bomber agility isn't that big a deal, and for take-off and landing auxiliary air intakes could open underneath, maybe via the undercarriage openings for maximum stealth (minimizing panels etc).

Here's a quick comparison of bombers and where I'd spec China's "ideal" H-XX.
14aam9t.jpg


Just a sketch
2zyd0e0.jpg


And a scale layout sketch with 4 AL-31 engines and 4 cruise missiles in a rotary launcher. Having the wheels so lose to the engines necessitated under-wng intakes to get the RCS reducing "S" bend.

2cp737r.jpg


The smaller weapons bay forwards is for targetting pods, radar pods, SRAAMs etc.

The same again but in "artist's impression" style:
bomberhxx2asr9.jpg
 
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Totoro

Major
VIP Professional
That's a nice picture there! Very good job. :) I sort of still like the regular wings better, purely from aesthetic reasons. For any sort of supersonic bomber with lowered RCS, delta wings are clearly better. It'd be better for RCS to have the intakes on top of the wings... IF the plane won't be manouvering a lot. :D

Cabin looks a bit large, though. Even for 4 people. Do the bunks in the back really need windows?
 
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