Russia Defence Forum

Would you like to react to this message? Create an account in a few clicks or log in to continue.

Military Forum for Russian and Global Defence Issues


+11
PapaDragon
Rodion_Romanovic
Tsavo Lion
George1
archangelski
GarryB
magnumcromagnon
victor1985
Werewolf
Berkut
Cyberspec
15 posters

    Tandem & Tilt-Rotor Aircraft development

    Tsavo Lion
    Tsavo Lion


    Posts : 5960
    Points : 5912
    Join date : 2016-08-15
    Location : AZ, USA

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  Tsavo Lion Sat Dec 05, 2020 7:09 pm

    the V-22B is 72 million dollars an aircraft... that is ridiculous... you could buy two Su-30s for that price...
    they'll save $ on new fixed wing C-2 replacements that must use CATOBAR & in day light only, as well as other helos the Marines & AF SFs otherwise need to use. Some r now/will be exported to Japan, Israel & Indonesia; others may order them later. And they don't need C-5s to bring them overseas.
    The Russian models would cost less & won't need CATOBAR; if VDV get them, others will want them too, just like with the USAF SFs, Marines & Navy. Tanker, attack, cargo, Arctic & firefighting versions would be useful too. And they won't need An-124s/IL-106/Slons or big ships to bring them overseas.
    They can take Mi-6/12 &/ An-12 from a museum/storage & make it a quadrotor for trials; if all goes well, it could go to serial production.  
    High speed trains run between a few big cities in European RF, not remote areas of the North & East of the Urals all the way to the Pacific coast. 
    The same for the mostly mountainous &/ desert Caucasus & C. Asia, not to mention in & around Syria, Iran & Africa where the Russian military will be more active in the next decade, if not longer.


    Last edited by Tsavo Lion on Mon Dec 07, 2020 3:09 am; edited 4 times in total (Reason for editing : add text, links)
    GarryB
    GarryB


    Posts : 40398
    Points : 40898
    Join date : 2010-03-30
    Location : New Zealand

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  GarryB Sun Dec 06, 2020 11:28 am

    Russia is investing in high speed helicopters, it makes no sense to then start developing tilt rotor aircraft too... it is redundant.
    Tsavo Lion
    Tsavo Lion


    Posts : 5960
    Points : 5912
    Join date : 2016-08-15
    Location : AZ, USA

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  Tsavo Lion Sun Dec 06, 2020 5:36 pm

    Investing in high speed helos doesn't necessarily exclude future investing in tilt-rotors. The Ka-102 will be exponentially better than the CH-47, & their future convertiplanes will be as good or exponentially better than the V-22B.
    Hybrid wars & CVN/TAKR/UDK hybrids lead to investing in hybrid aircraft.
    GarryB
    GarryB


    Posts : 40398
    Points : 40898
    Join date : 2010-03-30
    Location : New Zealand

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  GarryB Mon Dec 07, 2020 4:45 am

    The replacement for the Helix will be a Helix sized helicopter with a pusher propeller... there is no chance it will be a tilt or tandem rotor aircraft.

    Ka-102 is like those new Ukrainian transports... without funding they remain drawings and promises... in the case of the Ka-102 there is no value in such an aircraft for Russia... an aircraft that size is better off being a fixed wing aircraft...

    The US seems happy with no equivalent to the Mi-26, why do you think Russia needs a Chinook?
    Tsavo Lion
    Tsavo Lion


    Posts : 5960
    Points : 5912
    Join date : 2016-08-15
    Location : AZ, USA

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  Tsavo Lion Mon Dec 07, 2020 5:50 am

    in the case of the Ka-102 there is no value in such an aircraft for Russia... an aircraft that size is better off being a fixed wing aircraft...
     If size was the only issue, there would be no need for the Mi-6/26.
    The US seems happy with no equivalent to the Mi-26, why do you think Russia needs a Chinook?
    They don't want to spend extra $ on completely new heavier helos, & the CH-53D/47F can still be upgraded. More of them can be built to make up for less payload. Besides, they have more airfields for planes than Russia. It'll be a high speed tandem helo with comparable max speed of the V-22B. It's less risky & costly than a tilt-rotor & has a bigger cabin than coaxials.
    It's possible to build large cargo tilt-rotors as well:
    https://www.flightglobal.com/heavy-duty-us-army-backs-tiltrotor-as-future-battlefield-airlifter/78231.article?adredir=1

    https://www.youtube.com/watch?v=pwq69KsaRn8&list=PLjWkfFWGVi-Kt_IFJ-bOs22vNZzDn_Thd


    Last edited by Tsavo Lion on Mon Dec 07, 2020 4:46 pm; edited 1 time in total
    LMFS
    LMFS


    Posts : 5142
    Points : 5138
    Join date : 2018-03-03

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  LMFS Mon Dec 07, 2020 11:32 am

    GarryB wrote:The replacement for the Helix will be a Helix sized helicopter with a pusher propeller...

    According to Flateric that is the case... remember the picture f the mock-up we saw some time ago? He says there are propellers on a rack next to it

    I had hopes for that but had not seen the evidence or rather didn't have the background to interpret it correctly...
    GarryB
    GarryB


    Posts : 40398
    Points : 40898
    Join date : 2010-03-30
    Location : New Zealand

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  GarryB Tue Dec 08, 2020 6:09 am

    If size was the only issue, there would be no need for the Mi-6/26.

    The fact that you talk about the Mi-6 and the Mi-26 like they are the same aircraft is amusing because the Mi-26 has twice the weight capacity of the Mi-6...

    They had a use for Mi-6 aircraft but it has been replaced by the Mi-26... which they are going to be fitting with brand new engines... there is no point in now funding the Ka-102 which will have less payload capacity to replace something that is already working.

    They are working with China on a 10-12 ton capacity helicopter... if anything useful comes out of that it would make more sense to use that... but honestly I really don't see an urgent need for a new type.

    If they need to move 10 tons they could rig up the Mi-26 to carry the 10 tons but also to carry an extra 10 ton fuel bladder to extend flight range... but they don't even seem to want to bother doing that.

    They don't want to spend extra $ on completely new heavier helos, & the CH-53D /47 F can still be upgraded

    They print their own money... if they don't want to spend money on heavier helos and would rather upgrade ones they already have for any job then why on earth would Russia be pissing away money it has to earn and can't just print willy nilly on tilt rotors and shit when they have decided to invest in high speed helicopters?

    More of them can be built to make up for less payload.

    Big helicopters are expensive to buy and expensive to operate... you don't just buy a few extra on a whim.

    Besides, they have more airfields for planes than Russia.

    Siberia is flat open territory... Russia could have more airfields than planes... most human settlements would massively benefit from having an airfield.

    75 million dollar tiltrotors would never become commercially viable even if maintenance was free...

    It would be cheaper and easier to have rail hubs around the place and airfields along the rail lines to fly small planes out to settlements with short airstrips. Small settlements wont need Il-96 levels of cargo capacity... and even if they do.... say a coal mine...  a rail link makes much more sense.

    It'll be a high speed tandem helo with comparable max speed of the V-22B .

    Of all the new designs they are suggesting it is the one I like least...

    It's less risky & costly than a tilt-rotor & has a bigger cabin than coaxials.

    The Mi-6 and Mi-26 have the biggest cabins and they are not tandems. A coaxial helicopter can have any sized cabin, but even a tandem design will need tandem coaxials if you want it to be fast because of retreating blade stall issues.

    It's possible to build large cargo tilt-rotors as well:

    If and possible are useless words.... it would be possible to make it the most expensive aircraft project ever, but that does not make it a good idea.

    According to Flateric that is the case... remember the picture f the mock-up we saw some time ago? He says there are propellers on a rack next to it

    I had hopes for that but had not seen the evidence or rather didn't have the background to interpret it correctly...

    They said the new design has to fit into existing hangars and use existing equipment for storage and operation of the current models... which means that after everything is folded up it has to fit into the same size as the current helos.

    It will likely have new blades, a more aerodynamic shape, more powerful engines, and a pusher propeller, but other than that we will have to wait and see.

    It can't be a tandem because a tandem wont fit and it can't be a tilt rotor because it has its blades side by side and it wont fit either...
    Tsavo Lion
    Tsavo Lion


    Posts : 5960
    Points : 5912
    Join date : 2016-08-15
    Location : AZ, USA

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  Tsavo Lion Tue Dec 08, 2020 7:04 am

    GarryB wrote:The fact that you talk about the Mi-6 and the Mi-26 like they are the same aircraft is amusing because the Mi-26 has twice the weight capacity of the Mi-6...- the Mi-6 was the largest (& fastest) helo before Mi-26 came out.
    there is no point in now funding the Ka-102 which will have less payload capacity to replace something that is already working. -the Mi-6 has no modern counterpart in Russian service, & they need it-we discussed it before. The Ka-102 is its replacement.
    They are working with China on a 10-12 ton capacity helicopter... if anything useful comes out of that it would make more sense to use that...-as mentioned a while ago, they won't trust a Chinese helo to replace the Mi-6. 
    If they need to move 10 tons they could rig up the Mi-26 to carry the 10 tons but also to carry an extra 10 ton fuel bladder to extend flight range... but they don't even seem to want to bother doing that.-for a good reason: it has 800km range, enough for any mission with 10Ts payload; an Mi-6 size helo is cheaper to operate; just like it's better to use IL-76s than An-22/124s to haul 40-60Ts even if refueling stops r needed.
    They print their own money... if they don't want to spend money on heavier helos and would rather upgrade ones they already have for any job then why on earth would Russia be pissing away money it has to earn and can't just print willy nilly on tilt rotors and shit when they have decided to invest in high speed helicopters?-they developed the V-22 as it offered more flexibility & capability unheard off before; u said many times it's not worth restarting the An-22 as there r new IL-106/Slon designs- high speed helos & tilt-rotors would complement each other. Besides, there must be competing designs to choose from.
    Big helicopters are expensive to buy and expensive to operate... you don't just buy a few extra on a whim.-as u said: "They print their own money.", & also they needed something to replace the CH-53/47 earlier models fast.
    Siberia is flat open territory...-true, but only in the W. part; E. of the Yenissei river it's mostly hilly & mountainous, with permafrost, forests, glaciers, swamps, & lakes. 
    75 million dollar tiltrotors would never become commercially viable even if maintenance was free...-they won't be developed & sold for as much in Russia. Even existing helo/plane fuselages now in production can be modified for straight wings, H-tails & movable engine nacelles. IL-112 airframes would make nice tilt/quad-rotors.
    Of all the new designs they are suggesting it is the one I like least...-perhaps that's why u r so biased!
    A coaxial helicopter can have any sized cabin, but even a tandem design will need tandem coaxials if you want it to be fast because of retreating blade stall issues.- they'll have puller props for faster horizontal flight. I'm sure they considered a large coaxial but rejected it, not w/o a reason.
    it would be possible to make it the most expensive aircraft project ever, but that does not make it a good idea.- if the cost-benefit analysis is to it's favor, we may see it fly some day. Time (is $) will tell!


    Last edited by Tsavo Lion on Thu Dec 10, 2020 4:06 am; edited 2 times in total (Reason for editing : add links)
    Tsavo Lion
    Tsavo Lion


    Posts : 5960
    Points : 5912
    Join date : 2016-08-15
    Location : AZ, USA

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  Tsavo Lion Sat Dec 12, 2020 6:54 am

    An-148 update: https://lenta.ru/news/2020/12/11/an148/
    It's fuselage could be adopted for a tiltrotor as well.

    https://youtu.be/gybIgvfqggo?t=34


    ..the CV-22 Osprey tiltrotor.. maximum  speed  in airplane mode is 565 km/h, and its combat radius is 690 km. Amphibious loading radius - 722 km.

    NATO SF are preparing for a secret breakthrough in Russia from bases in the Baltics.

    With IRPs, their radius is at least 2x that.


    Last edited by Tsavo Lion on Sat Dec 12, 2020 8:03 pm; edited 1 time in total (Reason for editing : add text, link)
    GarryB
    GarryB


    Posts : 40398
    Points : 40898
    Join date : 2010-03-30
    Location : New Zealand

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  GarryB Fri Mar 18, 2022 1:00 pm

    All this BS about tilt rotors and it only achieves IOC now?

    Dude....
    Tsavo Lion
    Tsavo Lion


    Posts : 5960
    Points : 5912
    Join date : 2016-08-15
    Location : AZ, USA

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  Tsavo Lion Thu Oct 20, 2022 11:07 pm

    GB:
    And my point is that wasting time and money on such money pits would have delayed other work they are doing in new helicopters like Minoga, ..
    In August 2016, General Designer of Kamov JSC Sergey Mikheev said that it would take about 10 years for the development work on the  Minoga (Ka-65).
    https://nvo.ng.ru/armament/2022-09-29/8_1208_helicopter.html
    So it won't be ready for prototype production before 2026, at best.
    Tiltrotor platforms are a niche area that would create very expensive to buy and operate aircraft that could only be used by the military, the commercial value would be very low.
    even so, they would pay for themselvs many x over & in military/MChS/police/FSB service.
    The only model I could see being of any real world use would be a V-44 type with four engines in four corners of a large Mi-26 or Mi-38 like helicopter body, but even then I don't think it would be worth it.
    I'm sure that eventually they'll jump on this band wagon & produce V-22/280 counterparts that might be even better designs with superior performance & safer to fly, given the size of the RF with her long borders/coastlines, many remote islands, frequent inclement weather, & lack of modern airfields/ports.
    GarryB
    GarryB


    Posts : 40398
    Points : 40898
    Join date : 2010-03-30
    Location : New Zealand

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  GarryB Fri Oct 21, 2022 8:54 am

    In August 2016, General Designer of Kamov JSC Sergey Mikheev said that it would take about 10 years for the development work on the Minoga (Ka-65).
    https://nvo.ng.ru/armament/2022-09-29/8_1208_helicopter.html
    So it won't be ready for prototype production before 2026, at best.

    Yes, he did say that, but what he didn't say was when the development work on the Minoga actually started... from the exact same article which you seem to have ignored:

    Information about the development of "Lamprey" first appeared in August 2015. On the sidelines of the International Aerospace Salon in Zhukovsky, the head of naval aviation of the Russian Navy, Major General Igor Kozhin, said that JSC Kamov should introduce a new helicopter by 2020.

    even so, they would pay for themselvs many x over & in military/MChS/police/FSB service.

    They would pay for themselves by being commercial successes, which they wont... they would pay for themselves by never crashing and not killing any military personnel and looking at US experience I would have to say no they wouldn't.

    I'm sure that eventually they'll jump on this band wagon & produce V-22/280 counterparts that might be even better designs with superior performance & safer to fly, given the size of the RF with her long borders/coastlines, many remote islands, frequent inclement weather, & lack of modern airfields/ports.

    V-22 types don't make sense.... the four engine models like the V-44 at least look stable, but they really don't look like a good idea.
    TMA1
    TMA1


    Posts : 1189
    Points : 1187
    Join date : 2020-11-30

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  TMA1 Fri Oct 21, 2022 1:55 pm

    Minoga is one of the most exciting projects for helis out there. Are they still going with the pusher prop in the back? The twin rotors and pusher propeller layout seems much more promising, efficient, and flexible than the tilt rotor nonsense. The accidents will never really go away, and did any of you guys see the video supposedly showing the "agility" of the v280 valor tilt rotor when in verticle mode? Ridiculous. Now the speed would undoubtedly be better for tilt rotor craft but the double rotor and pusher design is no slouch and can reach speeds that are more than sufficient.

    Also the marines were talking about using tilt rotors for stealthy, quick insurgency? Maybe fast but damn I would have thought tilt rotors would light up like christmas trees on radar or IR optical equipment. Am I wrong on this?
    GarryB
    GarryB


    Posts : 40398
    Points : 40898
    Join date : 2010-03-30
    Location : New Zealand

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  GarryB Sat Oct 22, 2022 1:19 am

    Minoga is one of the most exciting projects for helis out there. Are they still going with the pusher prop in the back?

    I remember reading an article where someone in the know about Russian helicopter development was talking and he mentioned something new coming and could not say anything more about it... I kinda got the feeling that it was more than just a redesigned helicopter... it sounded like a new concept in helicopters potentially improving things dramatically...

    Now I could end up with egg on my face and it is some tandem or tilt rotor design, but I suspect it might be an electric drive coaxial design.

    The gearbox and transmission for a ten to twelve ton helicopter with coaxial main rotors is about 3 to 3.5 tons... the Helix and Hokum sized helicopter... now that is an enormous weight penalty but the advantages in flight and lift make it worth it, but it does explain why coaxial rotor helicopters are mostly either small drones or Kamov designs.

    With electric motors you could mount them one on top of the other below the rotor hub with the motor drive shaft of the top motor driving one set of rotor blades and the lower motor driving a shaft going through the middle of the top motor and its drive shaft to turn the other set of blades in the opposite direction... no gearbox needed... just a couple of gas turbine engines generating the electrical power to run the electric motors.

    Electric motors are getting smaller and more powerful all the time...

    The twin rotors and pusher propeller layout seems much more promising, efficient, and flexible than the tilt rotor nonsense.

    The rotor blades can be made stronger and less flexible and more like wings so they don't need to be so far apart.

    Having double the lifting wing area the blades on a coaxial helicopter can be much shorter than a conventional helicopter... the Hokum is a similar weight to a Hind or a Havoc and the Hokum has a 14.5m rotor blade span, while the Mil helicopters are about 17.5m.

    But looking at the propfans for the An-70 I wonder if more blades in the top rotor and bottom rotor might generate less vibration and more lift... I am sure they know what they are doing.

    Also the marines were talking about using tilt rotors for stealthy, quick insurgency? Maybe fast but damn I would have thought tilt rotors would light up like christmas trees on radar or IR optical equipment. Am I wrong on this?

    Different types of radar can see different things, one of the reason longer wave radar are good at finding stealth aircraft is because they can't see shape, so all that high tech stealthy shaping goes to waste, but I would say current and future Russian AD systems are being adapted to detect drones... very small drones... so I don't think there is much they can do to any troop transporting platform to make it invisible to Russian AD.

    Just visibly those huge turning rotor blades would attract attention I would think.

    Also troop transporting tiltrotor aircraft... faster than attack helicopters and slower that CAS jets... in a real combat situation they might find they have problems like the Soviets did with their heavy, medium, and light tanks... when they move the light tanks get there first and get massacred because they are only light tanks... then the medium tanks arrive and they do well because they at T-34s but the are likely a little outnumbered because the light tanks are gone and the heavy tanks have not arrived yet...

    Not impossible, but needs proper management.

    Regarding the Minoga I actually hope any pusher propulsion is carefully designed so that it allows ramp entry and exit because that is the main issue with the Helix family for troop transport (the blackhawk has the same problem). The hip, with their new rear ramp doors are able to let troops get on and off much faster than only going through the side doors, and it also allows the helicopter to transport light vehicles and get pallets and other payloads on and off much quicker and easier.

    Given the choice between higher flight speed and a rear ramp door I would say a rear ramp door would be better... but if they can engineer getting both then obviously that would be best... perhaps that is why it takes 10 years?
    Tsavo Lion
    Tsavo Lion


    Posts : 5960
    Points : 5912
    Join date : 2016-08-15
    Location : AZ, USA

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  Tsavo Lion Sun Nov 20, 2022 7:13 pm

    Yes, he did say that, but what he didn't say was when the development work on the Minoga actually started... from the exact same article which you seem to have ignored:
    Information about the development of "Lamprey" first appeared in August 2015. On the sidelines of the International Aerospace Salon in Zhukovsky, the head of naval aviation of the Russian Navy, Major General Igor Kozhin, said that JSC Kamov should introduce a new helicopter by 2020.
    even so, the start date isn't much earlier than the 1st mention of it; if it occured in 2014-15, it means a prototype won't be ready to fly till 2024-25, & it'll take a few more years before they begin serial production, if ever.

    They would pay for themselves by being commercial successes, which they wont... they would pay for themselves by never crashing and not killing any military personnel and looking at US experience I would have to say no they wouldn't.
    In time, all their bugs will be eliminated & they'll have improved safety record; even with all the crashes so far, the USN/MC/AF put them to good use & I'm sure they'll be better than C-2 CODs, not to mention Yak-44 type for the VMF. They could have 1-2 extra such AEW craft to fill radar coverage gaps & perhaps an ASW/SAR variant would be a lot more potent than their Ka-27 & on a par with the American S-3. In time, all their bugs will be eliminated & they'll have improved safety record.

    V-22 types don't make sense.... the four engine models like the V-44 at least look stable, but they really don't look like a good idea.
    Three-wing, six tilt-propulsion unit, VTOL aircraft would be even more stable:
    https://patents.google.com/patent/US8708273B2/en
    GarryB
    GarryB


    Posts : 40398
    Points : 40898
    Join date : 2010-03-30
    Location : New Zealand

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  GarryB Mon Nov 21, 2022 4:13 am

    even so, the start date isn't much earlier than the 1st mention of it;

    Not true at all.

    The start date for development of Poseidon and Thunderbird was probably rather soon after the US withdrew from the ABM treaty but it was probably ten years before these programmes were revealed to the public...

    It was pretty obvious to the west that the Helix family of helicopters needed replacement... they are replacing everything else so it was just expected but we really have no idea when serious work on a replacement actually started.

    if it occured in 2014-15, it means a prototype won't be ready to fly till 2024-25, & it'll take a few more years before they begin serial production, if ever.

    Their new helicopter carriers... Ivan Gren and Ivan Rogov class ships will likely both get new helicopter types to operate on them, but the existing helicopters are still useful and not in urgent need of replacement.

    In time, all their bugs will be eliminated & they'll have improved safety record; even with all the crashes so far, the USN/MC/AF put them to good use & I'm sure they'll be better than C-2 CODs, not to mention Yak-44 type for the VMF.

    Tilt rotor craft are middle craft... not helicopters and not fixed wing aircraft... something in the middle. A C-2 can't land vertically or take off vertically, but otherwise it is a useful aircraft. New designs with electric motors.... tiltrotors might become obsolete...

    They could have 1-2 extra such AEW craft to fill radar coverage gaps & perhaps an ASW/SAR variant would be a lot more potent than their Ka-27 & on a par with the American S-3. In time, all their bugs will be eliminated & they'll have improved safety record.

    A tethered airship 100m long could offer AEW 24/7 and could be designed to it can land on the sea surface in any weather conditions... a nuclear battery together with fuel cell technology to convert water to hydrogen gas and back to water as well as electric motors and enormous internal radar antenna... made out of fire proof composite material that is light and strong...

    Three-wing, six tilt-propulsion unit, VTOL aircraft would be even more stable:

    Three wings and 6 engines sounds a bit overkill doesn't it?

    How many extra would be needed and could it fly with half the engines out?

    Looks like an experiment rather than something that might actually be made.
    Tsavo Lion
    Tsavo Lion


    Posts : 5960
    Points : 5912
    Join date : 2016-08-15
    Location : AZ, USA

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  Tsavo Lion Mon Nov 21, 2022 6:28 am

    A C-2 can't land vertically or take off vertically, but otherwise it is a useful aircraft.
    they r too old now & it was decided not to develop a direct follow on- it was restricted to daylight flight ops only & must use the CATOBAR, adding to maintenance costs & reducing safety. The V-22 has no such restrictions & limitations, & can even assist with Vertreps.
    An amphib variant could be developed too.
    Tsavo Lion
    Tsavo Lion


    Posts : 5960
    Points : 5912
    Join date : 2016-08-15
    Location : AZ, USA

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty CH-57, Mi-30

    Post  Tsavo Lion Fri Nov 10, 2023 7:16 pm

    https://youtu.be/d0M-GGTWndE

    They could still dust this design off & develop something better from it:
    GarryB
    GarryB


    Posts : 40398
    Points : 40898
    Join date : 2010-03-30
    Location : New Zealand

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  GarryB Sat Nov 11, 2023 5:41 am

    Why the American Mi-30 succeeded and the Soviet Mi-30 failed?

    It failed because it was a bad idea and would work out costing rather more and delivering less performance than a further upgraded helicopter could manage.

    Very simply it was an attempt to replace a conventional solution with an exotic solution, and it failed.

    Their might be technology and materials that could make it work now but the entire idea was flawed... the big blades are awkward for vertical takeoff and it is not a very good helicopter, while facing forward it is not a particularly good plane either.

    Honestly it would be more valuable to continue with other Soviet experimentation with air cushion pads for an undercarriage replacement so the aircraft can take off from sand or water or ice or snow or any relatively flat surface.
    Tsavo Lion
    Tsavo Lion


    Posts : 5960
    Points : 5912
    Join date : 2016-08-15
    Location : AZ, USA

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  Tsavo Lion Sat Nov 11, 2023 6:13 am

    The American tiltrotor didn't fail as the US MIC had more $ & percieved need after the disasterous Iranian hostage rescue mission.
    Helos' capabilities, i.e flight envelope can be expanded but to a point, as their limits r inherent in their means of propulsion.
    Even those with coaxial rotors+props for extra speed would still give less speed & range than tiltrotors, so a time may come when the benefits > the costs of developing & using them, even in Russia & her armed forces.
    lancelot
    lancelot


    Posts : 3097
    Points : 3093
    Join date : 2020-10-18

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  lancelot Sat Nov 11, 2023 12:05 pm

    The whole system with complex hydraulics and fuel feed systems is prone to failure. I think this configuration would work better if they used hybrid propulsion where you would have a centrally mounted turbine engine powering tilting electric propellers in the wing tips.

    Tiltrotors simply weren't possible to achieve until fly by wire became common. So you could only start working on this in 1980s at best.

    GarryB likes this post

    GarryB
    GarryB


    Posts : 40398
    Points : 40898
    Join date : 2010-03-30
    Location : New Zealand

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  GarryB Sat Nov 11, 2023 2:13 pm

    The American tiltrotor didn't fail as the US MIC had more $ & percieved need after the disasterous Iranian hostage rescue mission.

    Operation Eagle Claw was the dumbest mission ever planned... if it didn't fail early it would have failed further into the mission and cost more lives and equipment and still failed its goals... it was just stupid Ego.

    We really don't know if the American Mi-30 is a success yet they keep lying about its problems and issues, so lets wait till it gets a difficult job done well before we claim it is anything but a money sink.

    Would say the same about the F-35 too.

    Even those with coaxial rotors+props for extra speed would still give less speed & range than tiltrotors, so a time may come when the benefits > the costs of developing & using them, even in Russia & her armed forces.

    Not sure they are that stupid... it would make more sense to use different platforms... if they had something like the VDV they could have landed an armoured force that could have gone cross country and taken over an airfield near where they wanted to attack and then use that airfield to land real aircraft with speed and range and payload for the job instead of pissing around with C-130s and large helicopters which are slow and lack range.

    I prefer this:

    Tandem & Tilt-Rotor Aircraft development - Page 8 10343319
    Tsavo Lion
    Tsavo Lion


    Posts : 5960
    Points : 5912
    Join date : 2016-08-15
    Location : AZ, USA

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  Tsavo Lion Sat Nov 11, 2023 6:21 pm

    Despite all their problems, the Military Can't Resist using them!

    Stop-fold aircraft concept combining the advantages of a tilt-rotor with potentially higher top speeds:  
    The advantages of tucking away the huge prop-rotors of a tilt-rotor and switching to jet propulsion are obvious, you frontal cross-section is massively reduced and you can potentially break the 540mph barrier that has long limited propeller-powered aeroplanes. ..There is also no fundamental reason why the concept should not be scalable over a wide range of roles and all up weights.

    They already plan 3 variants as on the picture, so not only UAVs will be utilizing that hybrid concept. https://youtu.be/vwqBzSE5V0g?t=316


    Last edited by Tsavo Lion on Sun Nov 12, 2023 4:36 am; edited 1 time in total (Reason for editing : add link)
    GarryB
    GarryB


    Posts : 40398
    Points : 40898
    Join date : 2010-03-30
    Location : New Zealand

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  GarryB Sun Nov 12, 2023 5:51 am

    Despite all their problems, the Military Can't Resist using them!

    What choice does it have as its helicopters get older and become just as risky.

    The advantages of tucking away the huge prop-rotors of a tilt-rotor and switching to jet propulsion are obvious, you frontal cross-section is massively reduced and you can potentially break the 540mph barrier that has long limited propeller-powered aeroplanes.

    575mph.

    This is US technology, why do you keep posting it in the Russian Air Force section?

    Good they admit those huge prop rotors are a problem when it is being a plane.

    What they don't admit is the fact that the combination of a helicopter from where they need to be picked up vertically, and a conventional aircraft at a nearby airstrip, is by far the cheapest and simplest solution to the problem.

    The far north and far east of Russia is getting more and more rail lines and roads and airstrips, meaning a helicopter plane is not really that useful.
    Tsavo Lion
    Tsavo Lion


    Posts : 5960
    Points : 5912
    Join date : 2016-08-15
    Location : AZ, USA

    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  Tsavo Lion Sun Nov 12, 2023 6:19 am

    This is US technology, why do you keep posting it in the Russian Air Force section?
    'cause often what's good for US is also good for Russia- both have long coastlines, big territory, bad weather, & expeditionary militaries.
    What they don't admit is the fact that the combination of a helicopter from where they need to be picked up vertically, and a conventional aircraft at a nearby airstrip, is by far the cheapest and simplest solution to the problem.
    I disagree: 1 aircraft with 1 crew is cheaper than 2 different a/c with 2 crews.
    Also, it can fly directly from point A to point B & C w/o stopping for transferring passengers/patients/medical/mil.personnel, thus saving time, lives & money.
    The far north and far east of Russia is getting more and more rail lines and roads and airstrips, meaning a helicopter plane is not really that useful.
    still, disruptions in their ops happen often there, so the more options the better.
    If/when regular High Arctic shipping starts, such aircraft would be well suited for ice recon & evacuations, as they'll be able to do these missions better than helos.
    Also, imagine a crew member(s) gets sick on a sub/ship far in the Arctic or Bering/Okhotsk Sea- then a tiltrotor can get in & out of there faster before taking him directly to a hospital. The same if some replacement parts/weapons r urgently need. https://youtu.be/F-JXetEyLaI
    https://www.thedrive.com/the-war-zone/this-photo-of-v-22-osprey-hovering-over-a-nuclear-guided-missile-submarine-is-nuts


    Last edited by Tsavo Lion on Mon Nov 13, 2023 6:38 pm; edited 2 times in total (Reason for editing : add text)

    Sponsored content


    Tandem & Tilt-Rotor Aircraft development - Page 8 Empty Re: Tandem & Tilt-Rotor Aircraft development

    Post  Sponsored content


      Current date/time is Sun Nov 03, 2024 9:50 am