NationStates Jolt Archive


The Su-71

Fascist Confederacy
29-01-2005, 05:50
Sukhoi-71 (Su-71) 'Butcher'
http://upload.wikimedia.org/wikipedia/en/8/8e/Su-37_2.jpg
Role: Next Generation Air Superiority Fighter
Crew: 1
Length: 56.50 ft.
Wingspan (Primary Wings): 47.00 ft.
Height: 13.50 ft. (Su-71A); 14.20 ft. (Su-71B Naval Varient)

Empty Weight: 48,000 lb.
Maximum Weight: 78,000 lb.
Fuel Weight: 17,000 lb. (Su-71A); 15,200 (Su-71B Naval Varient)
Armament Weight: 15,600 lb. (Su-71A); 13,800 (Su-71B Naval Varient)

Powerplant: 2x H790A Hardey & Foster vectored thrust pulse-detonation/turbo-fan hybrid engines
Maximum Thrust: 60,704 lbs per engine (Double Pulse- 119,551 lbs per engine)
Maximum Speed: Mach 5.2 (Double Pulse); Mach 3.9 (without Double Pulse) Super-Cruise speed: Mach 2.8

Initial Climb Rate: 47,000 ft/min
Service Ceiling: 86,650 ft.
Range: 1,900nm (combat) 3,400nm (ferry) [Su-71A]; 1,670nm (combat) 3,000nm (ferry) [Su-71B Naval Varient]
G-Limits: -7 / +13

Weapons: Four hardpoints underneath each wing, five fuselage hardpoints TOTAL EXTERNAL HARDPOINTS= 13
2x Internal bays each with two hardpoints for AAMs
1x SB-AGX-30 30mm Six-barreled cannon with 250 rounds of ammunition
Total armament weight that can be carried: 15,600 pounds

* * * * * *
The Su-71 was created by The Sukhoi Corporation in late 2004 and fully installed into the Confederate Luftwaffe and Confederate Kriegsmarine by early 2005. It was created to be the newsest air-superiority multi-role aircraft to combat heresy, infidels, and the evil far-left. It was in battle against West Belarusian and Estonian resistence in late January when the Confederate Heer pushed farther into Northern Europe.

The Su-71 has been battle tested and hardened. Only two of the new fighters were destroyed in combat against the resistance fighters. As we speak, The Sukhoi Corporation is readying an export edition of the fighter, so please stay tuned to be informed on their decision.

Engines
The Su-71 'Bucther' utilizes twin H790A Hardey & Foster pulse-detonation/turbofan hybrid engines which give the Su-71 unmatched speed and maneuverability. The massive engines, coupled with the ARSB's advanced turbine system and the Advanced Three-Dimensional AQT-80 Vectored Thrust system which can vector the engine's massive amount of thrust at angles up to 80 degrees and using enough speed to complete a full 160 degree conversion in about three seconds, meaning this aircraft can do full S-maneuvers without losing speed, control, or stability. Each engine can put out an amazing 60,000 pounds of thrust which can propel this aircraft to speeds of Mach 3.8. It can super-cruise at speeds approaching Mach 2.7.

But, that's not all... The H790A Hardey & Foster engine has evolved to the next generation. Its pulse detonation technology is now playing an ever greater role in this engine series' sheer power and capability. Now, with the advent of new technology, this engine can now 'Double Burst' using the 'Twin Pulse Acceleration System' (TPAS). When engaging the TPAS, a slight delay is present before the pulse detonation system (using controlled explosions to compress air for thrust) switches over to twin pulse which means each engine double fires for each pulse detonation. This means that each engine can put out 120,000lbs of thrust. However, due to the heat and pressure involved, the system can only operate for roughly 8-10 seconds depending on variables such as wind speed, atmospheric conditions, etc. Using the TPAS allows the aircraft to leap forward to a speed of Mach 5. The G-forces involved warrant the need for a special flight suit (hydrostatic), which is included with each aircraft. The TPAS can be the difference betwene life and death in some situations, however, it is not to be taken lightly. If overused, the stress enacted on these engines will force them to disintegrate if overused.




H790A Hardey & Foster
Engine Design Characteristics, Research, and Scientific Studies Relating to the Field of Direct Thrust Pulse Detonation/Turbofan Hybrid Engine Construction
-The Direct Thrust Pulse Detonation/Turbofan Hybrid Engine (DTPD/THE) is a full-production hybrid engine operated by the The Grand White Autocracy of Fascist Confederacy Sukhoi Corporation but owned by The Armed Republic of Soviet Bloc. Without our close allies support, this project would have been a failure.

The H790A Hardey & Foster pulse detonation/turbofan hybrid engine represents the zenith of Sukhoi Corporation engine development. Every Sukhoi fighter aircraft to date has been outfitted with a turbofan or pulse detonation turbofan hyrbid engine and the Su-71 is no different. Utilizing the experience created by dozens upon dozens of years of experience within the pulse detonation/turbofan hybrid construction and research process and trillions of dollars in funding, we have refined the pulse detonation/turbofan hybrid engine to a point near the technological limits of this hybrid technology.

The benefits of such a system? Increased fuel efficiency (fuel to thrust ratio). Less overall noise (since the two tend to harmonically dampen each other). Increased thrust. Resiliency. And an overall 'smaller' design. Also, you technically get two modes of thrust in one. Our pulse detonation/turbofan hybrid engine is often referred to as a vortex engine, only because of its outward appearance. In the center is the standard turbofan system (turbofan, interior turbine and compressor systems, etc.). However, surrounding the outside is a series of between eight and twelve cylinders, each capped and surrounded by a ceramic body with cooling fins, all arrayed in a way so they are angled into the bypass chamber (and into the interior chamber where fuel burns, turbine rotates, etc.). This gives the outward appearance of a 'vortex'. The idea behind the Sukhoi-designed H790A Hardey & Foster Engine series, is that a twin thrust occurs. The initial thrust is provided by the turbofan (where the compressor fans compress air, fuel is injected and the hot, high-velocity gases spin a turbine which in turn spin the turbofan to provide thrust), and this is usually used to maintain low heat emissions. However, the pulse detonation system can be activated at which detonations occur in an arrayed fashion (the tubes are numbered and given a pre-detonation sequence so they all fire in an arrayed fashion to maximize efficiency) at high rates (greater than 60 hz [times per second] but depending on need and certain factors relating to speed, environment). A compressed fuel/oxygen mixture is combusted in each cylinder (per firing order). The force of the detonation propels the hot gases onto the turbine blades (which are basically slabs of composite materials specially designed for this type of engine to withstand the intense heat and pressure) in conjunction with the heat and force produced by the conventional turbofan air compressors. Due to the firing order, a continuous stream of high velocity hot gases slam into the rear turbine set-up propelling the turbofan to its maximum efficient load. Behind the turbine is a series of baffles to redirect un-used pulse detonation thrust out the rear as direct propulsion which is supplemented by the turbofan (and its 'bypass' thrust). Each pulse detonation cylinder is passively (cool air hitting the cylinder) and actively cooled (liquid cooled).

Overall, this design creates an immense amount of power for a turbofan engine yet doesn't have the noise and heat issues with a 'pure' pulse detonation engine. Since the pulse detonation system on the H790A-series of engines are relatively low rate (in comparison to a pure pulse detonation engine which could hit thousands of times per second), many of the issues associated with the pulse detonation engine have been resolved. Since the pulse detonation system in the H790A-series of engines plays a 'direct thrust' role (i.e. directly creates thrust), the engine is overall more efficient and provides a greater thrust ratio than its other pulse detonation/turbofan hybrid counterpart, the H790-series of engines (previously used type) which used the pulsed detonations to compress air and not use it to accelerate the turbofan system.

An additional system to the New Generation H790B-series engine, is the 'Twin Pulse' which was, in the beginning, a rare and rather destructive occurance, which was often an unintentional mistake caused by a faulty injector and ignitor system (both would accidentally fire twice; causes attributed to heat). However, as the research continued and new technologies were produced, the 'twin pulse' was eradicated as a nuisance (which often completely ruined the cylinder it occured in). When the engine was finalized and placed on the Su-41 multi-role fighter, the twin pulse phenomenon was completely eradicated from the design. When research and development began on the Su-71 and its powerplant, a group of scientists carried on their own experiments at the Anotall Institute for Aircraft Powerplant Design using the center's own equipment and technology to demonstrate the potential of the 'twin pulse' phenomenon as a thrust enhancer. Unfortunately, during a live demonstration and with faulty technical data, their experiment went horribly wrong as they ran the engine too long using the system. The engine exploded with disastrous effects, leveling a 1600 square foot section of the engine test facility and killing twelve people. The same scientists were able to refine the system using data gathered in the explosion and were able to build a working model using the twin pulse as an optional boost system. The government cautiously allowed the scientists to pursue the system a second time. The second test went perfectly, increasing the thrust by a factor of 1.71, roughly doubling thrust. However, at the time, it could only be run for 5 seconds. New materials and technologies allow the system to run from between 6-8 seconds before the entire engine turns into a blob of molten metal moving at mach 5 (assuming its airborne) and flashboiling the aircraft's crew, fuselage, fuel, and weapons.

How does the twin pulse system work? Instead of a single blast occuring inside the cylinder, twin blasts occur at roughly the same time (well, less than a microsecond apart), propelling the gases at 1.9 times their normal velocity. As the jet of heated gas slams into the turbine, the number is reduced to about 1.7 due to mechanical inefficiency. However, if the system is run for more than 6-8 seconds, the cylinder itself melts in on itself while the turbine blades flashboil and the turbine housing explodes outwards due to the pressure, which eventually leads to a catastrophic explosion of molten metal resulting in the complete destruction of the aircraft. Outlooks aren't good for any pilot who uses the system, thus their reluctance to use the system. So far, it has not been used to date except for demonstration purposes.




The next generation of pulse detonation/turbofan hybrid technology, which is currently being researched by Sukhoi and Das Zitadelle appointed scientists, completely scraps the compressor system and instead uses the direct pulse detonation system to accelerate the turbine, increasing fuel efficiency (since no fuel would be burned in the conventional turbofan). This would reduce weight and size while increasing power. However, Confederate pulse detonation technology would have to be further researched to increase firing rates (into the hundreds or thousands of times per second).

Drawbacks? Complexity. First off, the turbofan is an already complex piece of machinery, add on a pulse detonation system and you've got a hard-core maintenance 'problem' (although numerous systems are in place to prevent any possible problems from occuring). Due to the intense heat and pressure created, many of the turbofan's components had to be redesigned with new materials and composities, increasing the cost astronomically. One of the few remaining drawbacks to our current pulse detonation technology is its weight. The engines are beasts, composed of heavy, heat resistant materials and many parts. However, the engines fit well with the Confederate Luftwaffe's 'Bigger, Faster, and Nimbler' policy which has governed the designs of every Confederate aircraft to date (all being within the 40,000lb to 80,000lb range), providing immense amounts of thrust to turn these large fighters into nimble creatures of prey with plenty of power to burn.
Fascist Confederacy
29-01-2005, 06:06
Bump
Fascist Confederacy
29-01-2005, 20:23
Bump For New International Interest
Artitsa
29-01-2005, 20:49
Pulse Det = not ready for 2004.
Fascist Confederacy
29-01-2005, 20:52
OOC: I don't follow the same exact guidelines as normal MT'ers. Not to mention, I got some help from a few allies. Thus, it's plausible.
Smokin Tha Chronic
29-01-2005, 20:53
We'd like some so we can fuck Automagfreek's shit up.

Signed,
King Dopefiend.
Tokarev
29-01-2005, 20:56
[OOC: *sigh* Not ANOTHER stupid newcomer trying to destroy AMF?]
Fascist Confederacy
29-01-2005, 20:58
We don't sell our fine products to moraless, marijuana smoking, society rejects. Go find your canabis smoking friends and buy some of their paper airplanes, I'm sure they'd sell them to you. Or give them to you for a 'hit'. -- Leonid Ilyich Kreskov, CEO Of The Sukhoi Corporation
Lame Bums
29-01-2005, 20:59
Office of the President
69 King Avenue
Vvardenfell City

To: Fascist Confederacy

It seems we have common enemies, and would be interested in buying as many of the new craft as possible. We are using Mig-31s, which quite effective, just won't keep pace with the modern times. We need something to kill more leftists, faster, and more efficiently. Contact us when they are ready for export

Presdient Jimmy Carville
14:57, 01.29
Smokin Tha Chronic
29-01-2005, 21:00
[OOC: *sigh* Not ANOTHER stupid newcomer trying to destroy AMF?]

Why don't you shut your damn mouth or I'll fuck you up too.
Arenumberg
29-01-2005, 21:01
Just a quick Question, Why would you be using Su Designations? You seem to be anti-communist, So why would you use a Soviet/Russian designation? Just seems odd to me.
Fascist Confederacy
29-01-2005, 21:04
OOC: 'Smokin Tha Chronic', please leave my thread before I report you for flaming.

IC:
As of now, we are discussing possible export versions. But seeing as we get our orders directly from the Czar, we must detain these until he sees it fit. But as of now, we still haven't come to an agreement on the export version. -- Leonid Ilyich Kreskov, CEO Of The Sukhoi Corporation

OOC: Lame Bums, do you have MSN? If not, I suggest you download it. That way we can discuss it more freely.
Fascist Confederacy
29-01-2005, 21:08
Just a quick Question, Why would you be using Su Designations? You seem to be anti-communist, So why would you use a Soviet/Russian designation? Just seems odd to me.

OOC: It involves a long process of me telling you my version of world history. Basicly: In late 1993 early 1994, the Soviet Union began breaking apart due to The Great War (It involves Mississippi, Kahta, Fascist Confederacy, and a few others). Thus, now, smaller nations are gaining more power than the collapsing USSR. Head officials of the Sukhoi corporation decided to turn against their former socialist allies and move their HQ from the country in order to avoid embargos, tariffs, blockades, etc. They moved to the country of their creator: Belarus (Pavel Sukhoi was born in Belarus). On early 2005, when The Confederacy annexed West Belarus into their Commonwealth, they unknowingly took the HQ of Fascian Aerospace's ally: The Suhkoi Corporation. Eventually the two merged and just became The Suhkoi Corporation located in Haydengrad. Its in my 'Suhkoi Corporation Merger' thread.
Hallad
29-01-2005, 21:14
OOC: The Su-27 design can't handle Mach 5.2, hell no RL plane could handle that. The range on it seems wrong. Something that moved that fast would guzzle too much gas. Even with extra gas tanks it wouldn't have much of a range.
Fascist Confederacy
29-01-2005, 21:18
OOC: So? I'm founder of OPEC. Lol. But anyway, this is a game, not RL, so: I liked the flanker picture, thus, I plastered it there. Not to mention, it's not suppose to be in Mach 5 for an extended period of time.
Lame Bums
29-01-2005, 21:24
I dont know what we could discuss about, we have a common enemy and I'm looking to buy as many planes as possible :sniper:
Fascist Confederacy
29-01-2005, 21:26
OOC: It's always good to have a few right-wing nations in my contact list.
Lame Bums
29-01-2005, 21:32
OOC: Do you have AIM?
Doomingsland
29-01-2005, 21:32
OOC:This plane is suspiciously similar to the F78 me and Soviet Bloc designed...
Fascist Confederacy
29-01-2005, 21:35
OOC: Yay! Someone noticed. We're allies and I've already gotten clearence to use them. He uses my pic for my old Mikoyan's, and I use some of his stats. No worries though, it's alright by him. And of course, if it's alright with you.

And no I don't, I do have ICQ. x.x
Fascist Confederacy
29-01-2005, 21:40
OOC: Of course, if it's alright with you aswell. I changed several things of course, and made it look different. SB never told me you helped design it. And... Piracy is just a form of flattery. XD
Doomingsland
29-01-2005, 22:51
OOC:Nah, I don't have a problem with it.
Fascist Confederacy
30-01-2005, 05:18
OOC: Thanks.
Kahta
31-01-2005, 01:58
Looks good, perhaps Alec Mannerheim would like to have some of these deliver some bombs to his house.

Czar Sam Fabus
RevertRomance
31-01-2005, 02:15
Nice, i currently use the F-35C and F-35D (dog fight varient) with my own mods to make them stack up to this superaircraft Doom and you guys make lol.

Just curious (im not buying just curious) how much per plane (seeing how Dooms plane is like 130M)

And also wondering why everyone seems to have an problem with AMF
RevertRomance
31-01-2005, 02:22
Why don't you shut your damn mouth or I'll fuck you up too.


LOL, with 7 million people in your nation

Why dont you just shut up and wait an month til you stronger or better yet just shut up

I declare war on you with your native n00b tounge (i could destroy you instantly, anyone could)

I LauNCH ovA 40000000000000!!!00000 millIOn N00Ks and BLows yA capiTa up.........I win biaCt
Fascist Confederacy
31-01-2005, 02:27
To: Czar Sam Fabus
From: Das Zitadelle And The Sukhoi Corporation

Yes, he would!



* * * * * *

As of now, our executives have been unable to decide on a specific price range. -- Leonid Ilyich Kreskov, CEO Of The Sukhoi Corporation

OOC: Please don't combat spamming with spamming, RevertRomance.
Tyrandis
31-01-2005, 02:36
OOC: What's this double-pulse BS? If you pumped twice the amount of thrust from the PDETs, your engines would explode.
Teh ninjas
31-01-2005, 02:38
+tag+ tech range?
Fascist Confederacy
31-01-2005, 02:42
OOC: What's this double-pulse BS? If you pumped twice the amount of thrust from the PDETs, your engines would explode.

OOC: Ask Doomingsland about the specifics. Im not specificly sure of the total schematics of double-pulse engines.

OOC2: And this is modern to early post-modern.
Doomingsland
31-01-2005, 02:43
Nice, i currently use the F-35C and F-35D (dog fight varient) with my own mods to make them stack up to this superaircraft Doom and you guys make lol.

Just curious (im not buying just curious) how much per plane (seeing how Dooms plane is like 130M)

And also wondering why everyone seems to have an problem with AMF
OOC:Lol, sure, dude, keep thinking a modified F35 can even dream of competing with the F78.
Tyrandis
31-01-2005, 02:45
OOC:Lol, sure, dude, keep thinking a modified F35 can even dream of competing with the F78.

Hi.

What's this "double-pulse" you made? Since the thrust from a pulse-det engine comes from a controlled explosion, doubling the size of said explosion would destroy your engines.
RevertRomance
31-01-2005, 02:45
OOC:Lol, sure, dude, keep thinking a modified F35 can even dream of competing with the F78.

Hum......maybe its time i research and create an new fighter? Any possibility you'd help me out here Doom?
Fascist Confederacy
31-01-2005, 02:46
OOC: Or the Su-71! XD
RevertRomance
31-01-2005, 02:48
OOC: Or the Su-71! XD


Maybe i would be interested in buying an few...say an sqaudron (20)

How much for said amount? (are they even for sale yet)
Fascist Confederacy
31-01-2005, 02:51
OOC: I've already said that they aren't for sale yet. And here's an explanation for Double-pulse:
Normally in a pulse detonation sequence, one detonation compresses the air for the turbofans (to propel the aircraft forward). With duble pulse detonation, instead of a single blast, twin blasts occur, either A) Compressing the same air to twice normal pressure or B)Compressing twice as much air. Either outcome results in roughly twice the thrust (since twice the air is being compressed). However, more airflow is required so the fighter must be at or around the Supercruise point...
Tyrandis
31-01-2005, 19:53
OOC: I've already said that they aren't for sale yet. And here's an explanation for Double-pulse:
Normally in a pulse detonation sequence, one detonation compresses the air for the turbofans (to propel the aircraft forward). With duble pulse detonation, instead of a single blast, twin blasts occur, either A) Compressing the same air to twice normal pressure or B)Compressing twice as much air. Either outcome results in roughly twice the thrust (since twice the air is being compressed). However, more airflow is required so the fighter must be at or around the Supercruise point...

OOC: Again, you're using two blasts instead of the standard one for which the engine is supposed to use. If you do try that, it's a given that your engines will be destroyed from the twin explosions.
Eltaco
31-01-2005, 20:01
123 Taco Street

From Dictator of Eltaco

The Rogue State of Eltaco is interested in purchasing 10 of these new fighters. Payment will be given upon delivery to us.
Isselmere
31-01-2005, 20:03
Mach 5.2 with these odd double-pulse engines. Unlikely. Doubling the compression ratios would not occur through pulses. Compression ratios are increased by the turbines. To increase the air pressure, you would have to increase the number of turbines or the speed at which said turbines spun. However, simply doubling the number of turbines or the rpm thereof would not guarantee a doubling in velocity. Furthermore, one would need to craft the materials which would permit the aircraft to fly such velocities, some of which are quite dense, therefore, heavy (for instance, titanium alloys). Also, at such velocities, manoeuvres become entirely abstract concepts as safe turn rates, even at +13 g (which would certainly cause the pilot to blackout, if not die), would be gargantuan. That and such turns would reduce the aircraft's velocity markedly.

In the unlikely event this aircraft was possible, it would cost in the hundreds of millions owing to the need to pay for the R&D costs of all the advanced materials and systems required to make the beast fly.
Fascist Confederacy
01-02-2005, 23:17
Engines
The Su-71 'Butcher' utilizes twin H790A Hardey & Foster pulse-detonation/turbofan hybrid engines which give the Su-71 unmatched speed and maneuverability. The massive engines, coupled with the ARSB's advanced turbine system and the Advanced Three-Dimensional AQT-80 Vectored Thrust system which can vector the engine's massive amount of thrust at angles up to 80 degrees and using enough speed to complete a full 160 degree conversion in about three seconds, meaning this aircraft can do full S-maneuvers without losing speed, control, or stability. Each engine can put out an amazing 60,000 pounds of thrust which can propel this aircraft to speeds of Mach 3.8. It can super-cruise at speeds approaching Mach 2.7.

But, that's not all... The H790A Hardey & Foster engine has evolved to the next generation. Its pulse detonation technology is now playing an ever greater role in this engine series' sheer power and capability. Now, with the advent of new technology, this engine can now 'Double Burst' using the 'Twin Pulse Acceleration System' (TPAS). When engaging the TPAS, a slight delay is present before the pulse detonation system (using controlled explosions to compress air for thrust) switches over to twin pulse which means each engine double fires for each pulse detonation. This means that each engine can put out 120,000lbs of thrust. However, due to the heat and pressure involved, the system can only operate for roughly 8-10 seconds depending on variables such as wind speed, atmospheric conditions, etc. Using the TPAS allows the aircraft to leap forward to a speed of Mach 5. The G-forces involved warrant the need for a special flight suit (hydrostatic), which is included with each aircraft. The TPAS can be the difference betwene life and death in some situations, however, it is not to be taken lightly. If overused, the stress enacted on these engines will force them to disintegrate if overused.




H790A Hardey & Foster
Engine Design Characteristics, Research, and Scientific Studies Relating to the Field of Direct Thrust Pulse Detonation/Turbofan Hybrid Engine Construction
-The Direct Thrust Pulse Detonation/Turbofan Hybrid Engine (DTPD/THE) is a full-production hybrid engine operated by the The Grand White Autocracy of Fascist Confederacy Sukhoi Corporation but owned by The Armed Republic of Soviet Bloc. Without our close allies support, this project would have been a failure.

The H790A Hardey & Foster pulse detonation/turbofan hybrid engine represents the zenith of Sukhoi Corporation engine development. Every Sukhoi fighter aircraft to date has been outfitted with a turbofan or pulse detonation turbofan hyrbid engine and the Su-71 is no different. Utilizing the experience created by dozens upon dozens of years of experience within the pulse detonation/turbofan hybrid construction and research process and trillions of dollars in funding, we have refined the pulse detonation/turbofan hybrid engine to a point near the technological limits of this hybrid technology.

The benefits of such a system? Increased fuel efficiency (fuel to thrust ratio). Less overall noise (since the two tend to harmonically dampen each other). Increased thrust. Resiliency. And an overall 'smaller' design. Also, you technically get two modes of thrust in one. Our pulse detonation/turbofan hybrid engine is often referred to as a vortex engine, only because of its outward appearance. In the center is the standard turbofan system (turbofan, interior turbine and compressor systems, etc.). However, surrounding the outside is a series of between eight and twelve cylinders, each capped and surrounded by a ceramic body with cooling fins, all arrayed in a way so they are angled into the bypass chamber (and into the interior chamber where fuel burns, turbine rotates, etc.). This gives the outward appearance of a 'vortex'. The idea behind the Sukhoi-designed H790A Hardey & Foster Engine series, is that a twin thrust occurs. The initial thrust is provided by the turbofan (where the compressor fans compress air, fuel is injected and the hot, high-velocity gases spin a turbine which in turn spin the turbofan to provide thrust), and this is usually used to maintain low heat emissions. However, the pulse detonation system can be activated at which detonations occur in an arrayed fashion (the tubes are numbered and given a pre-detonation sequence so they all fire in an arrayed fashion to maximize efficiency) at high rates (greater than 60 hz [times per second] but depending on need and certain factors relating to speed, environment). A compressed fuel/oxygen mixture is combusted in each cylinder (per firing order). The force of the detonation propels the hot gases onto the turbine blades (which are basically slabs of composite materials specially designed for this type of engine to withstand the intense heat and pressure) in conjunction with the heat and force produced by the conventional turbofan air compressors. Due to the firing order, a continuous stream of high velocity hot gases slam into the rear turbine set-up propelling the turbofan to its maximum efficient load. Behind the turbine is a series of baffles to redirect un-used pulse detonation thrust out the rear as direct propulsion which is supplemented by the turbofan (and its 'bypass' thrust). Each pulse detonation cylinder is passively (cool air hitting the cylinder) and actively cooled (liquid cooled).

Overall, this design creates an immense amount of power for a turbofan engine yet doesn't have the noise and heat issues with a 'pure' pulse detonation engine. Since the pulse detonation system on the H790A-series of engines are relatively low rate (in comparison to a pure pulse detonation engine which could hit thousands of times per second), many of the issues associated with the pulse detonation engine have been resolved. Since the pulse detonation system in the H790A-series of engines plays a 'direct thrust' role (i.e. directly creates thrust), the engine is overall more efficient and provides a greater thrust ratio than its other pulse detonation/turbofan hybrid counterpart, the H790-series of engines (previously used type) which used the pulsed detonations to compress air and not use it to accelerate the turbofan system.

An additional system to the New Generation H790B-series engine, is the 'Twin Pulse' which was, in the beginning, a rare and rather destructive occurance, which was often an unintentional mistake caused by a faulty injector and ignitor system (both would accidentally fire twice; causes attributed to heat). However, as the research continued and new technologies were produced, the 'twin pulse' was eradicated as a nuisance (which often completely ruined the cylinder it occured in). When the engine was finalized and placed on the Su-41 multi-role fighter, the twin pulse phenomenon was completely eradicated from the design. When research and development began on the Su-71 and its powerplant, a group of scientists carried on their own experiments at the Anotall Institute for Aircraft Powerplant Design using the center's own equipment and technology to demonstrate the potential of the 'twin pulse' phenomenon as a thrust enhancer. Unfortunately, during a live demonstration and with faulty technical data, their experiment went horribly wrong as they ran the engine too long using the system. The engine exploded with disastrous effects, leveling a 1600 square foot section of the engine test facility and killing twelve people. The same scientists were able to refine the system using data gathered in the explosion and were able to build a working model using the twin pulse as an optional boost system. The government cautiously allowed the scientists to pursue the system a second time. The second test went perfectly, increasing the thrust by a factor of 1.71, roughly doubling thrust. However, at the time, it could only be run for 5 seconds. New materials and technologies allow the system to run from between 6-8 seconds before the entire engine turns into a blob of molten metal moving at mach 5 (assuming its airborne) and flashboiling the aircraft's crew, fuselage, fuel, and weapons.

How does the twin pulse system work? Instead of a single blast occuring inside the cylinder, twin blasts occur at roughly the same time (well, less than a microsecond apart), propelling the gases at 1.9 times their normal velocity. As the jet of heated gas slams into the turbine, the number is reduced to about 1.7 due to mechanical inefficiency. However, if the system is run for more than 6-8 seconds, the cylinder itself melts in on itself while the turbine blades flashboil and the turbine housing explodes outwards due to the pressure, which eventually leads to a catastrophic explosion of molten metal resulting in the complete destruction of the aircraft. Outlooks aren't good for any pilot who uses the system, thus their reluctance to use the system. So far, it has not been used to date except for demonstration purposes.




The next generation of pulse detonation/turbofan hybrid technology, which is currently being researched by Sukhoi and Das Zitadelle appointed scientists, completely scraps the compressor system and instead uses the direct pulse detonation system to accelerate the turbine, increasing fuel efficiency (since no fuel would be burned in the conventional turbofan). This would reduce weight and size while increasing power. However, Confederate pulse detonation technology would have to be further researched to increase firing rates (into the hundreds or thousands of times per second).

Drawbacks? Complexity. First off, the turbofan is an already complex piece of machinery, add on a pulse detonation system and you've got a hard-core maintenance 'problem' (although numerous systems are in place to prevent any possible problems from occuring). Due to the intense heat and pressure created, many of the turbofan's components had to be redesigned with new materials and composities, increasing the cost astronomically. One of the few remaining drawbacks to our current pulse detonation technology is its weight. The engines are beasts, composed of heavy, heat resistant materials and many parts. However, the engines fit well with the Confederate Luftwaffe's 'Bigger, Faster, and Nimbler' policy which has governed the designs of every Confederate aircraft to date (all being within the 40,000lb to 80,000lb range), providing immense amounts of thrust to turn these large fighters into nimble creatures of prey with plenty of power to burn.