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Robbiesmurf

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Viewing 15 posts - 376 through 390 (of 473 total)
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  • in reply to: Last flight of a Victor #852576
    Robbiesmurf
    Participant

    I know our Lindy has used 120-odd FI’s.

    It should be in the F700 book.

    in reply to: test pilot: "F-35 can't dogfight" #2199169
    Robbiesmurf
    Participant

    Now that is about max turn rate, how about time on afterburner :
    Let start with su-27
    TSFC of AL-31 is 1.92 at full AB
    thrust at full afterburner of AL-31 is 27560 lbs
    Su-27 have 2 engines so it will consume 105830 lbs/hours
    Su-27 internal fuel capacity is 20725 lbs so with full internal fuel it have around 11.75 minutes on full afterburner ( with 40% fuel, it will last 4.7 minutes)

    F-16C/D ( no CFT)
    TSFC of F-110 GE129 is 1.9 at full FB
    thrust at full afterburner is 29500 lbs
    F-16 have 1 engine so it will consume 56050 lbs/hours
    F-16 internal fuel capacity is 6972 lbs so with full internal fuel it have around 7.5 minutes on full afterburner ( with 83% fuel it last maximum 6.225 minutes on full afterburner)

    F-15C ( no CFT)
    TSFC of F-100 PW229 is 1.94 at full AB
    thrust at full afterburner is 29160 lbs
    F-15C have 2 engines so it will consume 113140 lbs/hours
    F-15 internal fuel capacity is 13123 lbs so with full internal fuel, it have about 6.9 minutes on full afterburner ( with 58% fuel it last maximum 4 minutes on full afterburner )

    F-35A
    TSFC of F-135 is said to be 2 at full AB
    thrust at at full afterburner is 43000 lbs
    F-35 have 1 engine so it will consume 86000 lbs/hours
    F-35 internal fuel capacity is 18498 lbs so with full internal fuel it will have about 13 minutes on full afterburner ( with 57% fuel it last 7.41 minutes on full after burner)

    TSFC 1.92? compared to what?
    Altitude? Thrust and fuel used is dependent on the amplification ratio. The stoichiometric ratio remains the same, so it has to adjust on the altitude gained.
    Speed. What is the ram-recovery of the intake and the thermal efficiency of the engine?
    6.9 minutes reheat? Is the reheat system cleared for that length of time? Is it a 1750K or 1900K system? what damage can occur when the heat has stretched the reheat pipe?
    Gasflow. Are you talking about sonic or supersonic gasflow through the engine?

    in reply to: Last flight of a Victor #852717
    Robbiesmurf
    Participant

    In defence of that book, it is written from the Vulcan crews point of view. 🙂

    But I would really enjoy reading a similar book from a Victor crews point of view, especially the one that almost ran out of fuel on the way back – that must have been tense.

    Tuxford’s team. It has been documented on a few occasions. I have a book by Colin Cruddas ( In Cobhams’ Company) that details a lot about Flight Refuelling Ltd, even that incident.

    in reply to: Last flight of a Victor #852724
    Robbiesmurf
    Participant

    Have just finished re-reading Vulcan 607 (for the umpteenth time, but it is such a good book!) and am always struck by the somewhat unsung role of the Victors. The pressure put on the Tanker force and their ageing aeroplanes during Black Buck must have been immense….

    Robbiesmurf, you sound as if you have first-hand knowledge of this?

    ’82-’87 I was nailing the fleet back together. First VSF and then 55 sqn.

    in reply to: Last flight of a Victor #852854
    Robbiesmurf
    Participant

    Well, it was a hop. There was no intention at the time. I’m not surprised it happened with such a light load. I have seen them take off at Marham for a major at St Athan. No pods and a light fuel load, they were airborne after a very short run.

    in reply to: Last flight of a Victor #852862
    Robbiesmurf
    Participant

    Due to the Falklands war/conflict there were an awful lot of FI units used. The maximum would be 100 (safe) with a 30% safety factor. The stress airframe failed at 127 FI I believe and I was told that XL231 has 132 FI in the log, I assume XM717 is about the same. Take into account the lack of spares, there was a large stock used up during those difficult days. Shortly after the surrender the flow of spares stopped suddenly and was a trickle afterwards. The Conway 201’s are rather delicate, we had a fair few zero stage failures. Plus CSDU’s, fuel leaks, flaps, air services, RAT’s, and even a HDU failure! A Victor to the skies would be pushing your luck, too much money needed and too little support from the design authority. Handley Page built the a/c but was never part of BAC or HSA. The conversions to tanker a/c were carried out at Woodford who were a little sketchy about technical info now and then. A nice thought though……..

    in reply to: Vulcan XH558 spirited display at RIAT #853453
    Robbiesmurf
    Participant

    The difference between the Lightning and the F104G. The 104 WILL get you out of bed. They make quite a horrible noise!

    in reply to: Production quality and finish #854181
    Robbiesmurf
    Participant

    Compared to the Victors the Jaguar was a delight. Indeed, the rear was slightly off kilter on the Jag. The Victor 2? 32 a/c built 32 different ways…..

    in reply to: Production quality and finish #854565
    Robbiesmurf
    Participant

    Such as when it came round to fitting the new wings to the Nimrod MRA4s? :highly_amused:

    Even the Jaguars had discrepancies on it’s construction……………………..

    in reply to: Production quality and finish #855587
    Robbiesmurf
    Participant

    Service life was quite short in the war years so quantity was more important than quality. I have seen examples on a/c and vehicles.

    in reply to: Will the BBC please write headlines a little better #861431
    Robbiesmurf
    Participant

    Ah yes, the infamous Tintagel saga… think that particular Hunter suffered from hydrophobia 🙂

    If I remember the accident report correctly, banging out cleared the engine stagnation and it revved up again. The canopy being gone changed the trim and off he went………….

    in reply to: Will the BBC please write headlines a little better #861902
    Robbiesmurf
    Participant

    The “hero” business is as old as aviation itself. Every crash supposedly involves the heroic pilot steering the doomed machine away from people.

    Tintagel?

    in reply to: Canberra WK163 – any news? #861938
    Robbiesmurf
    Participant

    With the news that Midair Squadron have abandoned attempts to get their aircraft flying for 2015, I wonder when (or if) we’ll ever see a Canberra in the air again. 🙁

    Are Avon engines supported by RR now?

    in reply to: British jet fuel cap ID #866659
    Robbiesmurf
    Participant

    The Hunter is a pressure fuelled a/c. I don’t remember them having extra caps for open-line fuelling. Anyone else know?

    in reply to: Aeroventure lose out on a Vulcan Crew Drill Trainer #867471
    Robbiesmurf
    Participant

    Out of interest which?

Viewing 15 posts - 376 through 390 (of 473 total)