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Lucas Hofman

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  1. Lucas Hofman

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  2. Lucas Hofman
    I had expected more too. But this was with 4-5 year old 25C battery. But at least it showed me there is nothing wrong with the fan and I can glue it in the model tonight. I wondered whether silicon may be better then hot glue since it will remain somewhat flexible. What do you think? Regards, Lucas
  3. Lucas Hofman
    Started with the fuselage. Rectangular sanding blocks ensure formers being glued on 90 degress to the sides. I did a trial run of the fan at this stage. Smooth running but only 30A with a full battery. Is that enough or do I need to get fresh batteries? Cheers, Lucas
  4. Lucas Hofman

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  5. Lucas Hofman
    Anybody used tape hinges instead of fuzzy one's? The stabilers/elevators/ailerons are thin, and it is then easier to bevel one side and fix them with tape. Any opinions on whether this is good or not? Lucas
  6. Lucas Hofman
    Thanks Tim, I will do that. I did not find many build blogs. Are they in other places that in the Mass Build area? Lucas
  7. Lucas Hofman
    Profiling the wings tonight. I did not manage to mark the edges as described on the drawings. However, by putting the wing flat on the board beside a 1.5mm balsa flake one gets perfect lines straigh away: Using a plane was a little uncontrolled (the plane buried itself in the balsa). I bevelled the wings with a big sanding block with 120 paper. Lucas ps. anybody reading this, or is everyone already finished with his mini jet?
  8. Lucas Hofman

    Lucas Hofman posted a gallery image in Member Albums

  9. Lucas Hofman
    Started at last. Covering the building board with a clean piece of film is always a milestone: I show my method of glueing wing sheeting together (this should after all provide some support for new builders). For most glue joints I use PVA (white glue), which remains elastic, but here aliphatic glue is used, because it sands better. Step 1: fit the pieces together, sand a straight and perpendicular edge to each. Degrease and put a peace of tape over the joint. Fold open and apply glue Close the joint (tape down on the board). Weight the parts so they lay flat. Glue will oose out. and scrape away superfluous glue For thin sheets (i.e. when covering a wing) I tape the top side of the joint too. Here it is not needed. Inspection by the master of the house Cheers, Lucas
  10. Lucas Hofman

    Lucas Hofman posted a gallery image in Member Albums

  11. Lucas Hofman

    Lucas Hofman posted a gallery image in Member Albums

  12. Lucas Hofman

    Lucas Hofman posted a gallery image in Member Albums

  13. Lucas Hofman

    Lucas Hofman posted a gallery image in Member Albums

  14. Lucas Hofman

    Lucas Hofman posted a gallery image in Member Albums

  15. Lucas Hofman

    Lucas Hofman posted a gallery image in Member Albums

  16. Lucas Hofman
    Gents, Is the C rating of the battery critical? I have a few 20-30C (20C continous, 30C for 10s.) packs lying around, and the fan should not draw more than 40A (which is less then 20C on a 2200mAh pack). So in theory this should be good enough. But is it in practice. When spinning up the fan on the bench I did not notice much RPM increase after half throttle. I have not measure current or voltage though. Lucas Edited By Lucas Hofman on 23/03/2020 10:03:44
  17. Lucas Hofman
    Some more progress: Mounting the thrust tube: And the air intakes: Morten is still the only one building. I hope to start real soon now... Lucas
  18. Lucas Hofman
    Some creativity in creating the thrust tube: Morten, one of the builders experienced that his tube material was to stiff to bend to the required diameter. He came up with the following solution: 150 degrees centigrade for 10 minutes. The result is this: I wonder whether the ridges will lead to loss of thrust. Regards, Lucas
  19. Lucas Hofman

    Lucas Hofman posted a gallery image in Member Albums

  20. Lucas Hofman

    Lucas Hofman posted a gallery image in Member Albums

  21. Lucas Hofman

    Lucas Hofman posted a gallery image in Member Albums

  22. Lucas Hofman

    Lucas Hofman posted a gallery image in Member Albums

  23. Lucas Hofman

    Lucas Hofman posted a gallery image in Member Albums

  24. Lucas Hofman
    To avoid local virus spreading our national assosiation has strongly advised all clubs to cancel any activities, so this will not be a club evening build. However, Morten has started. As a graphical designer his planes always look good: And his first steps. He is using a building board of 5 cm blue foam, which is both stiff, light and take pins very well: Cheers Lucas
  25. Lucas Hofman
    At last the kits arrived in Norway: (just before the borders where closed...)
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