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  1. 1 point
    A few references: https://www.aopa.org/news-and-media/all-news/2011/may/19/impossible-turn-practice-makes-possible indicates (without any supporting evidence) BG speed and a 45 degree bank. They don't say whether that's BG in a turn or S&L, but since 1G BG is all anyone ever reports, that's what I'll assume they mean. In my plane at the GW's I was at, BG is somewhere in the 80 - 85 KIAS region. This: http://pilatusowners.org/wp-content/uploads/2014/01/US-Navy-turnback-study-1982.pdf is an empirical study that tested success with your parameters - just above stall speed, with different bank angles - 30 degrees and 45 degrees seemed to work the best in these test cases. This: http://peter-ftp.co.uk/aviation/misc-euroga/2013-turnback.pdf is a theoretical analysis, but is backed up with empirical results from testing, and recommends a speed of 5% above the stall speed IN THE TURN. So we may be saying similar things here, due to the differences between stall speeds in the 45 degree bank turns and at 1G (a factor of about 1.2). My airplane stalls, in the configurations I was testing, at about 62 KIAS. So with a 45 degree bank, the stall speed would be 74.5 KIAS. Now add on the 5% margin recommended in the last reference, and we're at 78 KIAS - almost exactly the 80 KIAS I noted was the best case for us. There's no way MY plane could do a 65 KIAS indicated turn at 45 degrees of bank - I'd be below my indicated stall speed and there's obviously be no margin on top of the stall speed. If we assume that (as is always the case) between min sink speed and stall, the descent rate increases, then it's better to be somewhat above stall, which the 80 KIAS gives me, per the last reference's recommendations. I think that the canard capability to get right up to stall speed makes this maneuver a lot safer than in a conventional plane, where a 45 degree bank at 5% over stall speed is pretty much begging for a stall/spin accident.
  2. 1 point
    Inspired by "The Big Book of Canards" and the calendar-wallpapers found on EAA's homepage, I thought it would be fun to have a similar wallpaper-calendar for 2010 with only canards! I can make and host these wallpapers - for free of course - but I need some GOOD canard-pictures - with good resolution. If you are willing to share your best pictures with the rest of us, please send them in email to my address: erlend@ljosnes.no. Please attach as much information as possible about the aircraft. I will publish the address of the wallpapers when January 2010 is ready!
  3. 1 point
    There will be pics but nothing is going to happen until late spring or summer. I am also working on an online construction log. I will publish a link when things get going.
  4. 1 point
    Mike Arnold's videos are also a great resource: