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Derekf

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Viewing 15 posts - 31 through 45 (of 1,281 total)
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  • in reply to: General Discussion #282631
    Derekf
    Participant

    Wasn’t he the one that questioned the validity of President Obama’s birth certificate?

    Anyway, Sheriff Arpaio seems to struggle with the concept of being “liberal”.

    in reply to: General Discussion #282564
    Derekf
    Participant

    I guess that’s democracy for you.

    in reply to: General Discussion #282578
    Derekf
    Participant

    How can anyone with “wisdom” equate liberalism of any kind, even the US kind, with being in jail?

    Was he joking? Or being ironic?

    I suspect not.

    in reply to: General Discussion #282086
    Derekf
    Participant

    The point of carrying a fighter up to 34km (111000ft) would be what exactly? Are the fighters solar powered as well?

    in reply to: General Discussion #281999
    Derekf
    Participant

    From 34 km the fighter can attack enemy at supersonic speed ( mach 3 max ) and reach an airstrip in Finland…without using the engines at all. As long as the mother ship flys above Finland.

    Mach 3 without engines? Straight down then. 🙂

    AWACs aircraft require lots of power, cooling, carry large radar arrays with the associated drag and now they have to carry aircraft with all the associated systems and have to be pressurized to operate at 111,000ft!

    Your solar powered aircraft are interesting and innovative but you are well and truly in the realms of fantasy now.

    in reply to: General Discussion #282057
    Derekf
    Participant

    what about longleight killing all their lions

    They haven’t killed them all. There was a cull of 6.

    in reply to: General Discussion #281922
    Derekf
    Participant

    But it was killed and went for food. So what is the difference between the lions eating beef, raised and slaughtered by man and a giraffe raised and slaughtered by man?

    Moggy

    Food wasn’t the reason for killing the giraffe though was it. It was killed because the zoo apparently mismanaged their breeding programme. The fact that the carcass was used of food is “bonus” for the zoo and the lions.

    in reply to: General Discussion #281936
    Derekf
    Participant

    Surely a responsible breeding policy would mean that the animal wasn’t born in the first place and not having to kill it when it was nearly two years old?

    in reply to: General Discussion #281955
    Derekf
    Participant

    I’m sure most can differentiate between the necessary killing of animals for food and the apparent unnecessary killing of animals in zoos.

    in reply to: General Discussion #281781
    Derekf
    Participant

    At a guess an anti aircraft shell passing close to it would be enough to disable it .

    That’s true of any aircraft though.

    I think topspeed’s aircraft have bigger problems than getting shot down. Getting in the air in the first place would be the main one.

    Solar powered AWACs or fighter carriers or passenger aircraft flying at over 100,000ft is simply not feasible.

    in reply to: General Discussion #281670
    Derekf
    Participant

    Oh is that all!

    You have some good ideas and please accept the criticism in the spirit that it is intended.
    I’m not sure why the mods decided that GD was the place for this rather Commercial Aviation. Perhaps they thought that GD had people in it that knew what they were talking about !

    in reply to: General Discussion #281476
    Derekf
    Participant

    Your design would have to comply with CS-25 otherwise it wouldn’t get a certificate of airworthiness. 40km/h stall speed or not.

    in reply to: General Discussion #281492
    Derekf
    Participant

    You’re talking about aircraft that would never get a CS-23/25 certification as a passenger aircraft.

    I did a bit of a Google and the nearest 36 seat airliner I could find was a SAAB 340. It uses 2 1300kW engines to fly not very fast and not very high but reasonably efficiently. That’s 76kW per passenger.
    It needs that sort of power to get airborne in a reasonable distance, climb to a reasonable height and fly 34 people to their destination. Your aircraft has 5% of the power so can you tell me it would be able to accelerate to a reasonable take-off speed in around 5000ft, climb to 25000ft and carry its passengers in air conditioned comfort at 0.5M for a couple of hours.
    In addition it has to power the air conditioning, the pressurization, the hydraulics, electrics, anti-icing etc. etc. All from a total of 160kW?

    in reply to: General Discussion #281365
    Derekf
    Participant

    You’re right. I do indeed find it impossible to comprehend how anyone can think that designing an aircraft only has to take speed and drag and power into consideration.
    Do you have any idea how strong (and therefore heavy)it will have to be structurally to maintain a cabin of 8000ft at 80000ft altitude?
    De-icing or anti-icing needs to work close to the ground as well as in free air -it needs to heat leading edges and propellers and pitots and static vents – all of which needs electricity.
    How large do you think the landing gear will need to be to hold up something bigger than a Tu95 and how much power wil it take to retract it?
    Maybe you can only fly on sunny days and take passengers who generate their own power by pedalling for 26hours. Good luck with that!

    in reply to: General Discussion #281370
    Derekf
    Participant

    It might not be CS-25 exactly but many of the rules are there to protect the fare-paying public from poor aircraft design so if it wasn’t CS-25 it will be very similar.

    Anyway, you haven’t explained how you are going to generate enough power to pressurize a fuselage to 8000ft cabin while outside is it 82000ft! Where does the bleed air come from? How is it heated to reasonable comfort levels? How do you keep the leading the airframe free from ice? What facilities do passengers need when airborne for over 24hours and how are they powered?
    Designing an airliner is a lot more than speed and power.
    Your solar panels would need to generate at least 20 times the power you are proposing to be even close to how a modern aircraft operates.

Viewing 15 posts - 31 through 45 (of 1,281 total)