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  1. S

    Hot wire cutting.

    I built my two hot wire cutters in the '80s (last century of course) and they are working excellently well after thousands of wings and fuselages cut with them. A simple C shaped wooden or mild square steel tube structure, with one isolated end and an adequate spring (or bungee) on the opposite...
  2. S

    Carbon Fiber Tube Fuselage

    As I mentioned, email Jim Marske and ask him.
  3. S

    Homebuilt ultralights suitable for unmodified paramotor engines?

    As I have already mentioned: Marc Motor "engine for emotion" : Ros125 mono cylinder details I have three of these motors for different applications (trike, small airboat and hovercraft thrust unit). They are excellent and much more inexpensive and trouble-free then the ones of the...
  4. S

    Carbon Fiber Tube Fuselage

    The best thing is to ask Jim Marske for advice. He has decades of experience with carbon composites. https://marskeaircraft.com/contact-marske-aircraft
  5. S

    Why battery-powered aircraft will never have significant range

    I agree, just studies.
  6. S

    Why battery-powered aircraft will never have significant range

    It seems to me as nobody has though about reality. Unless batteries will weigh much less than a half of the fuel load on any aircraft, their use is already unrealistic. Add to it that producing those batteries is and will cost far more than they will ever be able to recoved, Their production...
  7. S

    440CC Honda clone , anyone using any of the big singles for Ultra light?

    It is yuor and their life, not mine. I have been flying several types of aircraft for over 55 years, including some of my own designs and construction and I would not touch any of the above engines, expecially not the modified racing version. Remeber, if they stop and you are too low......
  8. S

    440CC Honda clone , anyone using any of the big singles for Ultra light?

    9 KW = 12 HP . Who is stupid enough to believe the given specifications? I would NEVER put one of those engines on any vehicle and certainly not on any aircraft.
  9. S

    Rotax 503: is there still a market for it?

    All the air-cooled Rotax engines do not anylonger have viable spares or the prices of what is available is exhorbitant.. The Hirth engines are terribly below the factory ratings. I am writing because of experience.
  10. S

    Lower budget engine options for a low budget UL

    If you believe Hirth specificatgions, you need to rethink. I had two Hirth engines and they are FAR BELOW specifications.
  11. S

    Elon Musk REVEALS Tesla's new battery design

    Hahahaha! You gave me a good laugh. It does not work.
  12. S

    Lower budget engine options for a low budget UL

    Go to this page and have a look: I have three of these and they are exceptional: https://www.manualslib.com/manual/1575663/Marc-Motor-Ros-Series.html The manufacturer's contact page: Marc Motor "engine for emotion": contact us
  13. S

    Low and Slow......and quiet ?

    Buy or build a nanolight trike with an adequately silenced engine and you will be happy. If you would like more information, let me know.
  14. S

    Elon Musk REVEALS Tesla's new battery design

    What electric car manufactiurers are not telling people is the amount of high-frequency radiation which come out of the speed controllers and is not shielded enough. I was in one of the recent fast Tesla cars and I managed to find out how much residual radiation was in the cockpit. The owner...
  15. S

    Any information on Zenoah G50?

    The pumps I had on my Zenoa G50 engines were rated at 31 lt/hr.
  16. S

    Any information on Zenoah G50?

    Both G50s I owned (they were new) had a single fuel pump with a Y splitter andn it worked really well.
  17. S

    Any information on Zenoah G50?

    Thank you. Everything seems to work to a tee. I would be happy if from now on you would use my email address: [email protected] Please send me a test email telling me that it is you sending it.
  18. S

    Any information on Zenoah G50?

    Thank you for the measurements: I am fine with inches or mm: to me it does not make any difference. The total length of the leading pipe is towards the maximum advisable but that is fine and the slight difference between the two lead-ins is due to the position of the system, obviously to avoid...
  19. S

    440CC Honda clone , anyone using any of the big singles for Ultra light?

    They weight 77 lbs and they are supposed to work at a maximum of 3600 rpm but not constantly. Even if not biffed, they are not long lasting engines. The lubrication is a splatter type. They are supposed to be running at a standard 2800 rpm. I would be very careful to use them above 3600...
  20. S

    Any information on Zenoah G50?

    Good. In the meantime, could you please measure the centre length of one side of the Y piece, plus the inner end diameter for me? Thank you in advance. If you are not accustomed to weld (no offense) I would ask a welder tradesman to do it, because it is going to be easy for him and he will not...
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