nlappos

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About nlappos

  • Rank
    Advanced Member

Profile Information

  • Gender Male
  • Location Cedar City, UTAH
  • Interests flying, astronomy, reading, family

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nlappos's Activity

  1. nlappos added a post in a topic Broken springs   

    I used a dual spring from Wausau Springs, (715) 845-6335, at about $75. Nice guys, strong springs.
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  2. nlappos added a post in a topic Rework an Avid Project, needed parts   

    Good Luck! Great project!
    Here is a wing construction document that is most helpful. I am searching for a supplier for the spars, and will post it when I find it.
    2.5" x 1/16" x 144" tubing: https://www.extrude-a-trim.com/aluminum-extrusions/aluminum-tubing/aluminum-round-tube/9
    2.5" x .083" x 144" drawn (stronger) : https://dovertubular.com/aluminum-seamless-tubing-search/
    Wing contruction.pdf

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  3. nlappos added a post in a topic Getting started/setup for Welding?   

    Laying in a 220V outlet in the garage is pretty easy, here are some videos: 
    https://www.youtube.com/watch?v=X9ro7Tc2nFI
    https://www.youtube.com/watch?v=u296hiXRzlE
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  4. nlappos added a post in a topic Disembodied spirit   

    Turbo,
    It is great to have your aerodynamic expertise on this site - drop back from time to time and share, OK?
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  5. nlappos added a post in a topic Overhauls   

    Rotax Rick is pretty reasonable, and his quality is great. He charges $1850 to $2200 for an overhaul of a 582
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  6. nlappos added a post in a topic Apex in a Avid C Model Thoughts   

    Jim Chuck has a good memory, this was posted by one of the yamaha guys.

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  7. nlappos added a post in a topic Prop loading   

    Allen, don't worry too much about CHT, the EGT will cook your engine in seconds. Basically, when trimmed at high speed cruise at high EGT (for gas efficiency) do not dive the airplane, this will make the rpm rise and the EGT will go very high very fast. In 10 seconds you can lunch your engine. To descend from high speed cruise, slow down first, then pull back the throttle.
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  8. nlappos added a post in a topic New Avid C Owner, Phoenix, AZ   

    Avidventurous,
    If you want a bit more power than the 582, talk to Rotax Rick about swapping your 582 core for a 670. I did and it is great! The install is a pure drop in for the 582, as well.
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  9. nlappos added a post in a topic Tailwheels   

    I removed my Maule and put on the Matco single arm wheel, it is lighter and less expensive, and I am not sure the dual arm has any great advantage.
    The pneumatic wheel is terrific, and is also so much quieter! It took a bit to get it to not shimmy, just follow the directions.
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  10. nlappos added a post in a topic LiFePO4 battery and a 582?   

    109jb
    I am putting a bunch of Tesla batteries in my new off grid house and have learned a bunch about them. For our purposes, while the weight savings is fantastic, the down side isn't
    Freezing weather is one, they really misbehave if you charge or discharge them below freezing. Also, the battery monitor has to be unique to the type of Lithium battery, in terms of the allowed max voltage, charge rate and such. 
    I wanted to go the route you thought about, then went to Walmart and bought another lawn tractor battery!
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  11. nlappos added a post in a topic Header tank   

    My header is not vented, the wing fuel flows into it, and it has lots of headspace to collect air, which I expel prior to every flight. I open the valve on the top and drain the fuel onto the ground, thus assuring that the air is let out first.
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  12. nlappos added a post in a topic Avid Stretch (Mini Plus)   

    Fantastic work! please keep us informed.
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  13. nlappos added a post in a topic Fairings, more   

    Simply said, you said that Drag is not proportional to Vsquared, and implied that it is not that big. It is, in fact it is bigger than Vsquared. Can you at least admit that?
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  14. nlappos added a post in a topic Fairings, more   

    109jb,
    Your discussion is helpful, your math, not so much.
    Total drag = Parasite + Induced drag. That means the Vsquared Parasite drag is ADDED to the Incuded drag to make total drag, so Total drag goes up by MORE that Vsquared. Somehow you think Induced drag is subtracted from parasite drag in the process, where this came from, I don't know. The fact that Total Drag line on the plots you provide is ABOVE Parasite drag is lost you you, but it shows that total drag is more than parasite, so it goes up to a higher value than parasite drag. Total drag rises faster than Vsquared, my friend.
    Here is nice discussion:
    http://www.pilotfriend.com/training/flight_training/aero/drag.htm
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  15. nlappos added a post in a topic Fairings, more   

    Oh for Pete's sake, save us the internet version of anti-vaccination, ok, 109jb. Or else write NASA and tell them your crackpot theory. Until then, drag goes up by V squared, and in fact power required goes up by V cubed. 
    https://www.grc.nasa.gov/WWW/K-12/airplane/drageq.html
     
     


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