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topspeed

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Viewing 15 posts - 61 through 75 (of 2,657 total)
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  • in reply to: General Discussion #281516
    topspeed
    Participant

    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 !

    GD people certainly know what they are talking about…and I consider myself one of them.

    Just think about it for a while…..Musculair II used 280 watts to move..little heavier Gossamer Penguin solar craft 540 watts. Why couldn’t a passenger ship with 3.3 – 4.45 kW ( 3300 – 4450 Watts ) per person be able to fly ?

    Can you please explain ?

    And that will take more than a little money to overcome.

    I don’t think little money is going to cut it.

    in reply to: General Discussion #281548
    topspeed
    Participant

    I assumed your design was for world wide use,cheap powered flight ,not as a quick scramble get to height to defend your country type machinery.At a guess an anti aircraft shell passing close to it would be enough to disable it .

    How many AA gun fire at 34 km altitude ?

    http://solar-flight.60934.x6.nabble.com/file/n17/748px-Gossamer_penguin.png

    in reply to: General Discussion #281557
    topspeed
    Participant

    It was moved here because this is a fantasy thread.

    Regarding your AEW craft, even if you offloaded the processing to a ground station (the russians do it for their naval AEW chopper, as it is too small to carry the necessary crew and equipment) with a secure (and resilient) data link, which would be the easiest way to disrupt such a system, you still need a LOT of electricity for the radar to work. Remember that you need power to cover 360° at a long range.

    In other words, there is a little detail that contradicts your ideas… it is called physics. And that will take more than a little money to overcome.

    Have fun with your forum.

    Ok so electricity cannot be produced by electric solar aeroplane…and it is against physics ?

    I will have fun with my forum…thank you very much.

    in reply to: General Discussion #281350
    topspeed
    Participant

    With the speed it flies at, you’ll have to fly at night as well.

    You’d have to sedate passengers to have them agree to fly in such a confined space. But of course, they won’t produce power. Unless … Have you seen Matrix ?

    For my part, I’ll take the train, thank you very much.

    I have seen Matrix all the rest of the SF celluloid fantasies.

    1/8 includes the cargo area..strictly passenger room is 1/4th..just a tad tighter and lower rooms with less wide corridors etc.

    It does not have fly at nite…if flying from east to west….but it may have to fly a tad faster than TU-95 “gummibear”..perhaps 950 km/h at 25-30 000 meters !

    in reply to: General Discussion #281363
    topspeed
    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!

    Right Derek..this is not intented to fly at nite…yes and I might use the passengers to retract the gear and produce power ( APU ). The power required is very low..so they don’t have to sweat and can take turns…but have no cramps…and stay fit ! Elderly and children don’t have to pedal.

    In decent the props rotate to make energy even after sun has gone down !

    I have already demostrated that a passenger room can be 1/8 of the present standard and still be manageable..less comfort..possibly. Easier to pressurize…using existing structures…yes !

    in reply to: General Discussion #281366
    topspeed
    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.

    Derekf !

    I think it seems for you and many others almost impossible to comprehend this aircraft cause you are so bound to see things happening as they are happening today in jet powered aircrafts !

    See the enclosed illustration…it is bigger than TU-95 in lifting area ( in fact 2.6 times bigger than Solar Impulse in area )..it weighs less than SAAB 340 but carries a load of ATR 72.

    There is a new way to produce oxygen that uses also the used air…over and over. Divers use it…also pedal power is possible to use compressors ( 50 passengers produce easily 8 kW ).

    The efficiency comes from cleaner airframe…electric engines don’t scoop air like combustion engines and jets….to slow the speed…thus needing more power to compensate it.

    if you understand 3D thinking…imagine Solar Challenger of 1981 by MacCready..it carried one person and had frontal area of 5.16 m2..this has 9.5 times more…but carries 74 people…so this is ( frontal area wise) 7.8 times more efficient…but has same the output per person…if you simplify it a lot…it is roughly 8 times more efficient than a 1981 solar aircraft ! When flying on battery assisted power too it is ( 3 x 8 = ) 24 times more efficient..or powerful.

    The wings are hot for the solar panels so they don’t freeze. Possibly in decent the power could be used to heat the wings when power for thrust doesn’t exist. I am not saying this is an easy task..this is “helluva” lot more complicated than any todays aircraft !

    Then again it needs no fuel…and is quiet and produces no emissions !

    in reply to: General Discussion #281371
    topspeed
    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.

    I don’t think so…it is a political decision in the future to go to electric aircraft after we run outa options….CS-25 is large turbine aircraft certification.

    in reply to: General Discussion #281191
    topspeed
    Participant

    Ok more accu power it is then !

    in reply to: General Discussion #281225
    topspeed
    Participant

    No paying passenger will ever pedal…that is a certainty.

    What if it is disguised as a GYM…and everyone pedalling there would pay extra..without knowing that they actually run the ships vital systems by pedalling ? :confused:

    in reply to: General Discussion #281237
    topspeed
    Participant

    Don’t give a certain Irish owned airline company any more ideas!! :highly_amused:

    I heard this one before….: )

    in reply to: General Discussion #281239
    topspeed
    Participant

    Firstly what you care to do when sailing with friends is totally irrelevant and secondly that assumption is just as likely to be wholly flawed as not, so hardly the basis for the viability of a serious project. I would suggest you test it before venturing much further, since it appears to stand or fall on passenger power.

    It is possible..the pedal power is only 4.7 % of the total solar power…easily to be made with just extra batteries.

    in reply to: General Discussion #281246
    topspeed
    Participant

    You have not yet commented on the responses to your bizarre suggestion that your passengers will be required to generate most of the power for your fantasy.

    I like to sail…and I don’t mind cranking the wrenches every now one then when sailing as a guest.

    Also some ecologically oriented people may even compete of the tickets if they have a carbon free possibility available..I assume.

    Note also that Boeing 747 wing loading is 800 kg/m2..where as Solar Eagle has 16 kg/m2..it is 1/50th..when all considered you understand why it can cruise faster at higher altitude ( or about the same 950 km/h ).

    http://en.wikipedia.org/wiki/Boeing_747

    in reply to: General Discussion #280994
    topspeed
    Participant

    Topspeed ,in this thread alone ,you have gone from one type of plane use to another [military-passenger ] ,solar panel,batteries,human power and now rockets .Non of the aircraft you have shown could even sit on a runway in the weather conditions we are having now.
    In 16 years you really ought to have alot more to show for it than you have,in 16 years time technology SHOULD make your designs obsolete,in 16 years time the majority of us on here will be dead or too old to pedal.

    Well I got this spesific craft idea on the drawing board at around..3 days ago ( post # 98 )..the first pedal/solar powered passenger craft around 2011/2012 winter. I think this rocket ship using the first tank/stage could take off at any given weather…and get above clouds pretty quickly..to fly on solar alone.

    Military ship came when someone said this is boring….there seems to be more people in the military thread…..:: )

    in reply to: General Discussion #280999
    topspeed
    Participant

    Hydrogen tanks ? Are you serious ?

    As for a Mach 1.5 plane with props, forget it, that will not work. Even if I forget aerodynamic questions, structurally, the props will not survive.

    If all this was so simple, you can be sure that Boeing, Airbus and the others would have done it already.

    I’ll repeat myself, go back to RC planes. There you will have interesting applications, some of which that you even might be able to market.

    Yes okay Frank..I think I got the point here made.

    No the props fold after the solar powered climb to 25-30 km has been done..and after that the hydrogen-oksidizer rocket will be used…at pretty morderate thrust..but in really thin air it might reach Mach 2+ at 50-60 km altitude…from there it can glide 2000-3000 km easily. Don’t have to since it can switch to prop powered flight at 40 km onwards to lower altitudes at close to mach 1 “glide” decent to about 20 km…and slower and slower from there.

    in reply to: General Discussion #281059
    topspeed
    Participant

    Sorry, Topspeed, when you resort to ludicrous suggestions such as passenger pedal power I just cannot take you seriously – 16 years nor not. In any case if your proposals had any validity someone would have joined you on the road to realising the project. So I regard it is a fantasy pie in the sky and wish you well – another 16 years perhaps – but cannot be bothered to follow your progress – or lack of it!

    Sorry Charlie..I didn’t understand that moving your feet is so arduous. I have cycled 327 km at best ( 2003 )…and last summer few 80 km legs…it really feels good. I myself would enjoy cycling if knew it might also be beneficial for the flight. Both..pedal power and solar energy have had many aircrafts flying in the past.

    Musculair II is the most efficient of the pedal powered crafts; http://www.skytec-engineering.de/musc2.jpg

    http://www.skytec-engineering.de/musculair.htm

    Needs only 280 watts to move…and has been flown with one passenger onboard too.

    Sunseeker II on the other hand produces almost 10 fold power over pedal power; http://solar-flight.60934.x6.nabble.com/file/n5/sunseeker_solar_main.jpg

    Pure electric aircrafts have flown at fairly tramendous speed so far like the MC-15E; http://upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Cri-Cri_electric.png/799px-Cri-Cri_electric.png

    Also a 4 engine Cri-Cri was made by EADS; http://www.popularmechanics.com/cm/popularmechanics/images/8l/paris-06-0611-xln.jpg

Viewing 15 posts - 61 through 75 (of 2,657 total)