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  1. H

    Opener BlackFly

    Ultimately even with blown wings. Multi rotors are inefficient. Lots of motors spinning small in efficient props. Tilt rotors and helicopters are both improvements on multi rotors. Doubtful a full on ospreyesque electric tilt rotor could be manufactured to fall within your part 103. However...
  2. H

    Swapping ply for carbon ??

    Thanks to you both After initial comments I had consigned this as a bad idea anyway Aitch :ban:
  3. H

    Opener BlackFly

    In the thousands of hours and miles flown. A heat or cooling problem would have shown up very quickly. Had there been a problem we would see cooling veins there are non so its safe to assume its not an issue. Out runner motors running at very high loads are common in drones of all sizes. Over...
  4. H

    Opener BlackFly

    Motors are completely in airflow at all times Fuselage position in cruise I would say is best with great unobstructed view forwards if not downwards. Something I hadn't thought about previously is as you don't really fly this you just tell it where to go. What exterior sensors does it have...
  5. H

    Wild West of Four Stroke Engines

    A reduction drive will not make more hp it may be more efficient for a given flight envelope and may therefore make more (by more I mean best) thrust within that. envelope. Aitch :ban:
  6. H

    My Project: Electric single seat Microlight

    Love this Maybe I'll look up someday soon. And see you over derbyshire Aitch :ban:
  7. H

    Darkaero aircraft

    I'm quite sure they fell in love with the material And after much structural analysis used as little as possible. Strength for weight honeycomb materials are Strong but sheets are generally thin so it's all about how it's used within the structure to get the strength to weight benefits. It's...
  8. H

    Fabrication and Production of Compound Curved Sheet Metal Panels

    After watching that video I think the forces required may supprise you. The English wheel is the tool for low volume stuff like this there are some videos out there if them being used for coach building car parts Including e-type bonnets "hoods" and wings "fenders"...
  9. H

    What would it take to create a profitable new Concorde replacement?

    Beg my pardon Mis Read completely I'm not used to billions :ban:
  10. H

    What would it take to create a profitable new Concorde replacement?

    So losses reduced by 100,000,000 in one year give or take. Two more years and they are moving into annual profits. Clearly investors and government are expecting good returns. Aitch :ban:
  11. H

    What would it take to create a profitable new Concorde replacement?

    Cost go down sales go up soon its profits Aitch :ban:
  12. H

    What would it take to create a profitable new Concorde replacement?

    Clearly tesla is growing hugely quickly the losses as a percentage of gross profit are reducing fast the two figures will soon cross to show operating profits. Great things ahead too when they bring out a more mass market product funded by the top 10%.. Now that's a good result
  13. H

    Opener BlackFly

    I have lost motors and props on hexacoptor and octocopter "drones" the resulting control is far from instantaneous and rather ungainly. I kind of rotating wallowing like a machine version of pilot induced occilation as the hardware and software battle to maintain stability and control. However...
  14. H

    Opener BlackFly

    Why?, you need to ask? The glide in this thing as Buz Light year would say isn't flying its falling with style. Certainly over here "UK" you won't be flying over highly populated areas at low altitude in your single engined light aircraft even though its failure mode and glide would be far...
  15. H

    Opener BlackFly

    If only it were that simple. In a multi rotor differential power for lift and differential torque are used for control and stability. Purely mathematically 5 motors provide lift equivalent to weight but the centre of lift will not match centre of gravity = uncontolable On six motors depending...
  16. H

    Opener BlackFly

    There may be better options https://youtu.be/NHmT4pKFjgc Aitch :ban:
  17. H

    Opener BlackFly

    Lots of favourable comments here. But seriously would anyone here be prepared to go up in one? Sooner or later there will be n engine / battery failure and I wouldn't fancy the chances for the occupant.. Aitch :ban%
  18. H

    Lets build an electric ultralight (in one month)

    It's got to be a hair raising ride. You start seated. Take off feet up above your head. Then level flight your almost standing. In a glide you'd be tipped overfirwards heading 1000 feet per minute towards the ground at god knows what air speed before what would have to be a perfectly timed and...
  19. H

    Lets build an electric ultralight (in one month)

    Are they totally nutts¿¿¿ they will be telling us the aero car is finally here but that thing power off will be a nose dive to certain death.... Aitch :ban:
  20. H

    Decalage angle

    Wow this thread has taught me no end about aircraft design. The first thing anyone tells you about aircraft design is to first set out mission criteria. In the case of your aircraft this was low speed circuits with some higher cruise speed possible. side by side trainer excellent (helicopter...
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