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Thread: Helicopter News & Discussion

  1. #841
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    Quote Originally Posted by J Boyle View Post
    Has the record breaking technology used in the special Lynx been used a anywhere else...or is it the helicopter equivalent of the ME-209?
    Yes, BERP III was used on production Lynx and the technology further developed into BERP IV used on the EH-101.
    Because sometimes in life we need a bit of fun

    https://www.youtube.com/watch?v=TXNAp3mKepc

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  3. #843
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    ...

    Quote Originally Posted by bring_it_on View Post
    The final requirements would probably only emerge closer to actual program start but broadly they are looking at a 2X increase in combat range and 2X increase in cruise speed compared to the crafts they intend on replacing (Apache is one of them). A trade space of around 240-300 Knots has been mentioned in the past for the program.


    For the JMR-TD precursor to FVL, the US Army has laid down a number of key performance parameters for the competing designs. In terms of speed, the service stipulated in its 2012 Broad Area Announcement a performance of more than 230 kt while carrying 12 fully equipped troops.

    Powered by the Lycoming/Honeywell T55 engine, the SB>1 Defiant is expected to fly at up to 250 kt, while, as the designation suggests, the General Electric GE T-64-powered V-280 Valor is said by Bell to top-out at 280 kt. While both demonstrators will be fitted with current-generation powerplants (the T55 drives the Boeing CH-47 Chinook while the T-64 does the same for the Sikorsky CH-53E Super Stallion), both will likely benefit from the Improved Turbine Engine Program (ITEP). ITEP and Future Affordable Turbine Engine (FATE) programmes are now underway. Jane's International Defence Review, April/2017 "Fast Spin: Industry pushes the envelope for high-speed helicopter performance"
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    Last edited by bring_it_on; 20th April 2017 at 12:57.
    Old radar types never die; they just phased array

  4. #844
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    Click image for larger version. 

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    Has this thing any actuality?
    Last edited by TomcatViP; 20th April 2017 at 18:12.

  5. #845
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    Now just put AESA arrays in that disk between the blades & you have the awacs to work with F35B

    Nic

  6. #846
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    Put anti-gravity tech on it and you have a flying saucer.

  7. #847
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    Why would you put anti gravity technology on something that have wings?

  8. #848
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    The UH-1H helicopter crashed near the village of Sarantaporo in Elassona, central Greece, on Wednesday morning.

    Greek armed forces investigate crash that killed four officers

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  12. #852
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    China's Homegrown Helicopter Completes Test Flight Over Qinghai Plateau
    That rotor system has been seen already somewhere else.

  13. #853
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  14. #854
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  16. #856
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    Netherlands secures additional Chinooks

    Under the current multi-year buy, the US Army ordered 12 CH-47Fs last year as part of an effort to replace the Dutch CH-47Ds. The recent contract award adds two more Chinooks for the Dutch, raising the total new aircraft purchased to 14, a Boeing spokesman says in an email to FlightGlobal.
    Source:
    FlightGlobal.com

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  19. #859
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    OPINION: Norway H225 crash probe raises troubling questions

    https://www.flightglobal.com/news/ar...ing-qu-436887/

    The frankly startling revelation that parts sourced from one of two suppliers have a failure rate three times as high as the alternative is troubling; that no one thought to analyse this data before last year’s Norway crash is almost beyond belief.
    Source:
    FlightGlobal.com

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  21. #861
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    Flawed flight-control logic triggered AW609's in-flight break-up: report

    ANSV says the accident happened during a third round of high-speed dives using the programme’s second flight-test prototype (N609AG), with two previous efforts that day having passed off without incident.

    The pilots commenced the dive with a 180° left turn, aiming for a speed of 293kt (542km/h), but on roll-out observed the start of “slight lateral-direction oscillations”.

    These were not initially countered as the crew believed they were “self-damping” but as they grew in amplitude and frequency, the pilot flying attempted to correct the roll with “counterphase input roll manoeuvres and then pedal inputs”.

    “However these actions did not dampen the oscillations, which instead became divergent, bringing the sideslip angle to reach values above the maximum allowed in those speed conditions,” says ANSV.

    Flawed flight-control logic meant that pilot inputs to counter the excessive roll, and then yaw, had the effect of simply amplifying them, it says.

    This caused the AW609 to reach a sideslip angle of 10.5° - well above the 4° maximum – “so inducing contact of the right proprotor with the right wing due to excessive flapping of the proprotor blades”. [...]
    ANSV says insufficient flight and wind tunnel testing of the aircraft’s new tail configuration contributed to the lack of data on how it would perform at speed.

    Source:
    FlightGlobal.com

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  23. #863
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    A helo shall cost more than an F-35?

  24. #864
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    Do we have any figures on Mi-26T2 cost for comparison?

  25. #865
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    Not an easy task, because the Mi-26s are rarely bought alone.. usually they are a part of some package by Russian helicopters..

    FY2005: Venezuelan contract for 15 helicopters - six Mi-17V-5, eight Mi-35M2s and one Mi-26T - worth $201 mil
    FY2006: Venezuelan contract for 38 helicopters - 14+18 Mi-17V-5, two VIP Mi-172s, two Mi-35M2 and two Mi-26T - worth $484 mil

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  27. #867
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    Well well well! Reversal of previous decision & a significant cut in numbers. We built 64, then decided to replace them with 50 new ones, & now instead of that we're going to rebuild only 38 of the 64 old ones.
    Juris praecepta sunt haec: honeste vivere, alterum non laedere, suum cuique tribuere.
    Justinian

  28. #868
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    Yes is it clear whether there will only be 38 in use or if some will be old and some "new"? I thought Boeing weren't going to support the D any more? What is the thinking I wonder.

  29. #869
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    I imagine the thinking is that $488m is much less than $2.3bn.

  30. #870
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    Probably, but it's a very low number if they aren't using something else for part of the mission.

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