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Viewing 15 posts - 541 through 555 (of 2,657 total)
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  • in reply to: General Discussion #272642
    topspeed
    Participant

    Last try !

    London-Sydney in 5 hrs !

    Hybrid rockets with 280 ISP give me M9 top speed at 80 km.

    This should be very practical.

    I had to refrain from the space going version as the 465 s ISP rocket ( Vinci ) is just under testing it cannot be used in this. It would enable just barely bring it to orbit ( LEO ).

    This is a tad slower than Skylon on London-Sydney route .

    This is doable and flyable, but a multibillion euro project that I alone cannot affort.

    It could also be used carrying 15-20 metric ton rockets into orbit ( 5-6 ton payload ).

    This is approximately 4 x more effective in carrying stuff high than the Space Ship II.

    :eagerness:

    It is a prop thing too…Martin Hepperle perhaps could design the props that also create thrust in 50 km at M3.

    in reply to: General Discussion #273000
    topspeed
    Participant

    -deleted by the author-

    in reply to: General Discussion #275357
    topspeed
    Participant

    -deleted by the author-

    in reply to: F-35 News and discussion (2016) take III #2203520
    topspeed
    Participant

    Seen this yet ?

    S-400 beats the F-35 hands down ?

    https://www.youtube.com/watch?v=nVj8T-skY6g

    in reply to: General Discussion #276687
    topspeed
    Participant

    I have proven my point.

    ….and here is my good friend smiling at your comment from beyond the Milkyway !

    God speed Finny !

    in reply to: General Discussion #276694
    topspeed
    Participant

    I should not do this, I will probably regret that I replied, but here goes: I do believe that there are opportunities in all forms of aviation and propulsion. But these will be developed by people (most likely hired by large companies) who have a good understanding of aviation, regulations, aerodynamics, propulsion and aircraft structures, among other things. People who have none, or very little of the above will keep writing on aviation forums. Those who actually work on these things won’t have time, or at least they do not need to bother. I let the audience decide who is making himself look ridiculous…:)

    Yes I can agree with this….I wouldn’t hire you to build this ship but an army of professionals.

    in reply to: General Discussion #276895
    topspeed
    Participant
    in reply to: General Discussion #276911
    topspeed
    Participant

    I am not taking the bait. You can compare yourself with Wrights and keep on discussing with yourself.

    I am not comparing myself with two bicycle industrialists…I am explaining you in layman terms how ridiculous you make yourself look…as you don’t see history happening in solar flight.

    Advancement in solarcell efficiency and weight is incredible….and bringing the ” almost obsolete ” idea of lifting fuselage and high cruising altitude with new materials that make this tick…into whole new level…this can be counted…as I said before….this smaller spanning ( 80 M ) has 4,5 times more cell area ( thanks to lifting fusealge )…and 33% more efficiency in them than Helios which flew 240 km/h at 30 km altitude in 2004.

    Anyone with aviation studies behind would see the possibilies in this. It is enermous task to make everything just right, but it does need an attitude change..which I am not seeing unfortunately happening here.

    Peace Finny…and live long and prosper !

    in reply to: General Discussion #277268
    topspeed
    Participant

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    in reply to: General Discussion #277329
    topspeed
    Participant

    Of course it will never happen. Best way to deal with this Walter Mitty is to ignore him and let him discuss with himself. Same thing has happened on several Finnish aviation forums, from all of which afaik he has ended up being banned.

    Yes think about it for a while !

    I know we can fly with solar very effectively…as the numbers don’t lie as they say.

    Finny position yourself into 1902 Kittyhawk…you would have called the Wright bros idiots ! What does that make you ?

    I will change my sights from a cheap small single engined plane and I will fly this twin to beat the Scottie Winton 1983 FAI altitude record …first that is.

    in reply to: General Discussion #277559
    topspeed
    Participant

    Personally, I don’t see it ever happening with a commercial passenger carrying aircraft.

    Hi Alan !

    What propulsion do we use after we run outa oil ?

    Here is 1/4 scale man flying version.

    See it has muscle powered aeroplane wing loading even it weighs 250 kg ( if elevator counted in ).

    Even 5% efficient panels would bring a man in flight in this kite.

    Blended wing / lifting fuselage is just awesome.

    in reply to: General Discussion #277708
    topspeed
    Participant

    Sure, a plane flies thanks to faith, not thanks to the laws of physics.
    A commercial airplane WILL be heavy. It is meant to transport stuff. Either freight of living beings. So your weight will either go to cramming as much cargo as possible in it, or having all necessary life support systems. Including pressurization and providing oxygen.

    A good glide ratio doesn’t cut it. As far as I know, you have to be able to get back to an airport ( with a flight time of n minutes) on one engine, maintaining level flight ! Ever heard of ETOPS (or other such regulations? )

    As for the concept of “pedal of you’re going down” in the case of emergency, I’m sorry but I don’t think any aviation instance would even remotely accept it. Oh, and that also adds weight to your fantasy planes, btw.

    May I also remind you there’s a general discussion forum, and a RC planes forum, as these daydreams would be more at home there.

    Yes pedalling is a no go.

    I have now 3,3 times more solar panel area in this than in Solar Inpulse II.

    I expect the electric version to climb up to 25 km and cruise at 400-550 km/h.

    It is still a long way to travel from London to Perth for instance. Would sleeping quarters help it ?

    There seems to be a suitable engine available ; http://www.gizmag.com/siemens-world-record-electric-motor-aircraft/37048/pictures

    50 kg only. Cells weigh around 220-240 kg. Incredible.

    About ETOPS; https://en.wikipedia.org/wiki/ETOPS

    I have to test it with a two engine model. I bet it is swell flyer on one engine.

    in reply to: General Discussion #278099
    topspeed
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    in reply to: General Discussion #279035
    topspeed
    Participant

    -deleted by the author-

    in reply to: Cirrus SR20 down in the states, three dead #380242
    topspeed
    Participant

    It sounds (and looked on TV) like a crash on landing…not exactly the profile to use the chute.

    Didi run outa fuel after three go arounds ?

    http://abc13.com/1380393/

Viewing 15 posts - 541 through 555 (of 2,657 total)