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  1. J

    DaSH PA, an impressive human-powered airplane flies

    Fabulous! Thanks for sharing that! Jim
  2. J

    Unlimited Aluminum Aeorbatic Aircraft

    There might simply be an opening that hasn't been explored yet, since the people flying and designing planes are probably not the same people flying advanced aerobatics. When the Pitts was designed it was based on an engine that by today's standards is very heavy. The more modern designs like...
  3. J

    Unlimited Aluminum Aeorbatic Aircraft

    Very well said, John. All of it. Jim
  4. J

    Unlimited Aluminum Aeorbatic Aircraft

    TFF, Yes, flying a Pitts in Unlimited is a challenge, possibly involving some penalties for breaks or outs, but for the budget minded it is an option. There are a lot of other barriers to flying Unlimited besides money. It's simply not for everyone. In Advanced the Pitts does great. You are...
  5. J

    Unlimited Aluminum Aeorbatic Aircraft

    It seems like it is a pretty common complaint that competing in Unlimited is too expensive. Yet there are many inexpensive aircraft already available that can fly the Unlimited sequences. The Pitts S1S does all the figures. It has won before and it can still win. Jim
  6. J

    Unlimited Aluminum Aeorbatic Aircraft

    Not trying to split hairs here but just to make sure the details are clear, the Extra 300 is not an unlimited class airplane and also has 300hp. It is often flown in Advanced but only rarely seen in unlimited and it is completely outclassed. It is also a two seat airplane, so it is heavier...
  7. J

    New Aircraft design tube fuselage with foam core wing

    There aren't many people alive who have been through this process even once. You will encounter hundreds of prolific forum posters for every prolific airplane designer. There is probably a tendency for the group to overly value the shared lore it has developed through so much forum...
  8. J

    New Aircraft design tube fuselage with foam core wing

    Steel tube with composite panels for the fuselage sounds like a good way to go. The Extra uses this for the top of the fuselage, the cowl, and the forward underside of the fuselage. However, the rear bottom of the fuselage is covered with fabric. This scheme makes a lot of sense because, as...
  9. J

    Unlimited Aluminum Aeorbatic Aircraft

    There is at least one example I'm aware of where the officials used a radar system, but in general it is up to the judges to make "high" and "low" calls. Consequently it is very hard to earn a "high" call since it is a matter of judgement and not a safety issue. Low calls are more common...
  10. J

    Unlimited Aluminum Aeorbatic Aircraft

    That's pretty much what the One Design is. It's probably pretty close to 70% in each dimension. In aerobatic competition you must fly in a box. The box is 1000 meters x 1000 meters. The height of the box floor depends on the category. In Unlimited the floor is at 100 meters. There is no...
  11. J

    Unlimited Aluminum Aeorbatic Aircraft

    You can find out about what aircraft are flown in international competition at Aerobatic Championship Results This last year in France is right here: Known*compulsory*programme Top 3 positions went to the Extra 330SC. Generally speaking you will find mostly Extra and Sukhoi aircraft at the...
  12. J

    Unlimited Aluminum Aeorbatic Aircraft

    I'm flying in Advanced and Unlimited with my Extra 330LX and I've thought about this subject a bit. Maybe my thoughts will help. If you are on a budget and want to build a competition airplane then you are going to want to go with 4 cylinders. The obvious starting point is the Pitts. There...
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