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  1. Orsovolante

    Model 17 Staggerwing 450-600Kg gross weight reply?

    Yes, your observation is correct. But 450 kg single seat would not fall into the Italian ULM category. Someone made Renegade Spirit and then simply gave up on the front seat. But in Italy they fly fischer Classic and Celebrity in the ULM category. The radials then have an excellent weight /...
  2. Orsovolante

    Model 17 Staggerwing 450-600Kg gross weight reply?

    Ok. I am at work away from home and from the pile of wooden slats that should become my airplane. I have a lot of time to think and every now and then an idea comes up again. Premise. In Europe the rules on ultralight planes are much more permissive, as far as I know, than in the USA. I think...
  3. Orsovolante

    Stressed-skin plywood construction without lumber?

    Some reflections. I have often read the word "sustainable". Well I believe that the only thing that is more sustainable in plywood is the possibility of using less valuable and faster growing plants, such as birch, compared to fir. For the rest there is a lot of glue and energy-consuming...
  4. Orsovolante

    How to transfer 1: 1 drawings from paper to wood?

    Even if I was referring to drawings only on paper, your idea is interesting. Somewhere here on the forum, I saw the posts of a person who directly obtained the parts drawn on the CAD, with a fairly simple 2-axis CNC machine. Here in Italy, there are cnc wood cutting services on files formed by...
  5. Orsovolante

    How to transfer 1: 1 drawings from paper to wood?

    Hello to all. A seemingly trivial problem but ... Today many drawings are released in 1: 1 scale. Very useful to check the correctness of your construction but I still haven't found a good way to transport these designs on wood. In particular, the shapes to be obtained directly from the plywood...
  6. Orsovolante

    Removing glued parts and gluing new parts. Precautions regarding already penetrated glue?

    I used one of those oscillating tools on which you can mount different types of accessories. A pointed spatula with an abrasive side allowed me to work fairly accurately. In the past I have had the opportunity to make repairs on composite vehicles, in particular sailplanes, but generally the...
  7. Orsovolante

    Removing glued parts and gluing new parts. Precautions regarding already penetrated glue?

    In the repair of the cell of the FP404, I have removed numerous parts of wood separating them along the gluing line. Now I have to paste the new pieces and a doubt arises. How much do I have to worry about the previous glue, penetrated where I'm going to glue the new piece? Clearly I prepare the...
  8. Orsovolante

    FP404 fusellage main spar replace

    I'm waiting for a new set of drawings because with this cell I received only a few faded sheets. I didn't intend to reduce the cross-section of the side members but shorten it a little, 1mm the "bos spare" to get the glue better on the sides. however basically I will follow your advice to add...
  9. Orsovolante

    FP404 fusellage main spar replace

    The damage was done mainly by those who tried to drive screws. the plywood has been broken by me to show the longitudinal member. the wings are stelate and have a few broken ribs. the other damages were related to the firewall and its structure that I am reconstructing.
  10. Orsovolante

    FP404 fusellage main spar replace

    Good morning. I'm putting my hand to a Fisher FP404 returning from a heavy landing and a clumsy attempt at repair. At the moment I am rebuilding the firewall but the most serious problem concerns the main fuselage spar. Someone tried to repair it even screwing on another piece of wood :-(. They...
  11. Orsovolante

    Classic fuselage designe but in carbon fiber tubes?

    After all it is quite probable that others have already had your problem and that someone has a solution ready ...
  12. Orsovolante

    Classic fuselage designe but in carbon fiber tubes?

    Yes the method illustrated at the bottom was the first one I thought of. But I believe, based on my little experience, that the Ʊ (omega) shape is difficult to obtain with carbon skins that do not willingly accept to be folded at excessive angles. It could be made in glass or prefabricated in...
  13. Orsovolante

    Classic fuselage designe but in carbon fiber tubes?

    The problem, which I have already experienced, is that carbon fiber skins do not easily mold, as can also be seen from the photo. If it were possible to design a cell with angles of the same joints in several points, then it would be possible to make connecting shells prefabricated in molds.
  14. Orsovolante

    Classic fuselage designe but in carbon fiber tubes?

    An idea would be to reinforce the joints as is done in wooden buildings. Simple sticked spruce blocks. Forgive my first experiments with freecad.
  15. Orsovolante

    Classic fuselage designe but in carbon fiber tubes?

    Proper consideration. I believe that a monocoque fuselage made in an autoclave would be on top of everything. however, compared to the classic techniques for self-builders, foam and glass or carbon sandwiches, it would be simpler. Small amounts of resin or glue at a time. no large surface to be...
  16. Orsovolante

    Classic fuselage designe but in carbon fiber tubes?

    Yes, I thought about it, but in a fuselage every joint would have different angles. It would be easy to get the shape of the joints to the CAD but their production would be a little different. The zepelin system is very nice but I think it is expensive to produce those pieces in limited series...
  17. Orsovolante

    Classic fuselage designe but in carbon fiber tubes?

    Good morning. I think the idea came to many but I didn't find any discussion on the forum. Build a classic fuselage, in tubes and canvas, but instead of using steel tubes use carbon fiber tubes. The joints would probably be too weak to stick. But they could easily be reinforced with pieces of...
  18. Orsovolante

    Electric Ultralight (Goat)

    in the movie we see the glider that takes off and the propeller turns, in my opinion dragged by the relative wind. also in other phases of the film my impression is that it turns not because the engine is driven, but because it is set in rotation by the wind. An electric motor offers little...
  19. Orsovolante

    Electric Ultralight (Goat)

    Interesting. In Italy a manufacturer proposes the "Zigolo", a very similar vehicle, and is currently preparing an electric version. Some considerations. In my opinion it is absolutely necessary to provide some brake that prevents the propeller from being dragged when flying with the engine off...
  20. Orsovolante

    Verner 5V VS Rotax 582 ... some surprises

    FP 404 is sold to be able to mount also the 582 65 HP. I still have to take the fuselage and the related drawings home to see if installation is really possible. Also the maximum torque on the propeller at the power I tested is practically identical between the two motors, when you considered...
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