nlappos

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About nlappos

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    Advanced Member

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  • 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 Rotax 4 cylinder opposed engine   

    In a subsequent video, the engine failure guy (friend of Trent) owns up to the fact that he built an uprated 912, but he "used an 80 horsepower crank" because he didn't have time to put the higher rated crankshaft into it.
    Less a damnation of an engine type than an admission that some experimental guys just screw up. Check out his discussion of the cause of the failure at time 1:20 here:  https://youtu.be/j7uMgxXwfmY
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  2. nlappos added a post in a topic Washout... teach me!   

    The washout makes the root of the wing stall first, thus preserving roll control as the stall announces itself, since the tips will have nice regular attached flow and the ailerons/flaperons will act normally in that area. My gut feel is that the flaperons will have the same control with or without tip extensions, so leave the washout as it is. 
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  3. nlappos added a post in a topic 582 performance   

    The trick is to have the prop that suits the lower rpm. Bigger diameter and fatter blades should do the trick. All the prop companies have the calculator to come up with an ideal prop. 
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  4. nlappos added a post in a topic 582 performance   

    Allen, I think you can get off the ground at 5500 rpm (with a 582 set up for 6500  rpm max). You can easily maintain level flight at 5500 rpm or less, so I bet if you hold the aircraft on the ground in a level attitude, tail up, and wait to about 50 mph at 5500 rpm you can unstick and slowly climb.
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  5. nlappos added a post in a topic Weird idea   

    Thanks my bad. .016" would be strong enough. Has a working strength of easily 300 lbs per strip, ultimate of maybe 900 lbs, and your butt is resting on several strips at once. My bad.
    That seat would weigh perhaps twice what a high strength ripstop nylon would weigh, but its not out of sight.
    OK,. I give in!
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  6. nlappos added a post in a topic Weird idea   

    Guys, aluminum weighs 1.81 oz per cubic inch. 1/16" thick aluminum 1" wide therefore weighs about 4 oz per linear yard. Nylon webbing weighs .71 oz per yard, so aluminum weighs 6 times more than nylon.
    Tell me again how light it is.
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  7. nlappos added a post in a topic Weird idea   

    He could have made it heavier, but that would take even more work. Cement, maybe.
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  8. nlappos added a post in a topic AVID PHONE NUMBER   

    https://avidkitplanes.com/
    mmendick@avidkitplanes.com
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  9. nlappos added a post in a topic Is this tail spring bent?   

    Jim, It looks like you have a clamp up at the top of the double spring, seems similar to what I did to help keep the second spring aligned. This might help Willja67, too.
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  10. nlappos added a post in a topic Is this tail spring bent?   

    The best rule is to judge the verticality of the TW pivot axis, the closer to pure vertical the better, since if the angle is slanted, as the TW turns it has to pick up the airplane's tail a bit, which hampers ground maneuverability. It looks good to me.
    I doubled the spring on mine and found it barely fit inside the channel, so I clamped the two springs together to prevent the extra spring from popping out.

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  11. nlappos added a post in a topic A better way starter solenoid   

    But the "inertia" comes from the starter as it winds up, so the inertia adds to the electrical load through the starter contacts. Same-same.
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  12. nlappos added a post in a topic A better way starter solenoid   

    The solenoid's main job is throwing out the gear to engage the flywheel, making the contacts comes along for the ride. That is why the solenoid is so big.
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  13. nlappos added a post in a topic Hillbilly Fox   

    1avidflyer, That was a cheap shot. 99.99% of FAA folks are on our side, and virtually all my dealings with them have been great. But that quote was told to me by a friend, a GS-14 FAA specialist!
    When I swapped engines, gear and prop, the FSDO guy said just log it into Phase 1, stay within the limits, and log it back out after 5 hours. No inspection, no heartache.
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  14. nlappos added a post in a topic Drawings for cabana style shock gear wanted for kitfox IV or Avid mk IV   

    Yes, Lowell is still in the game, I exchanged emails with him today.
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  15. nlappos added a post in a topic Hillbilly Fox   

    Jim, I always call the FAA when I need some help. The last inspector explained their philosophy. "We're not happy until you're not happy!":
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