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  1. R

    Solid Rivet shop head size criteria

    If you're designing (and you know what your'e doing), you can design for anything you want as long as it's safe. But if you're building a kit, or even building from plans, it's likely very unwise to change the fastening method specified by the designer. Extreme example: the homebuilt that had a...
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    Klixon circuit breakers as switches

    Good tip; certainly worth keeping one on hand even if it's for home use. Simpler than dragging out a variable voltage/variable current power supply (and less expensive, if you don't already own the power supply).
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    Klixon circuit breakers as switches

    In response to the Garmin install docs: Remember, Garmin (and many other avionics mfgrs) are writing for two groups; their legal departments and the FAA (for type-certificated a/c). Many of the 'requirement's are just common sense, to make everything more reliable and to make it coexist well...
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    Klixon circuit breakers as switches

    As Billski and others have said, CBs & fuses protect wire; not devices. "Circuit Breaker"..... Voltage drop due to resistance almost always becomes critical *long* before the wire is in any danger from heat. Wire is sized for current, and voltage drop due to length, and protection is sized to...
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    Battery options

    I agree that lithium tech batteries have amazing 'shelf life'; even longer than SLA batteries, which have quite long unattended lives, themselves. (IIRC, Odyssey says something like 90% charge remains after 6 months.) The point of the post you quoted is that if the a/c is electrically...
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    Battery options

    Totally unrelated to what I said.....
  7. R

    Wooden floor size suggestion please?

    No doubt. I suspect that the same caution would apply to any plastic a/c, including the certified ones.
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    Drying out fuel tank

    Just looked up the TDS for Dow 730: Compatibility DOWSIL 730 FS Solvent Resistant Sealant releases a small amount of acetic acid during cure. This may cause corrosion on some metallic parts or substrates, especially in direct contact or when the cure is carried out in a totally enclosed...
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    Drying out fuel tank

    I'd never trust a pressure gauge for testing a fuel tank. If it's off by 2 or 3 psi, you could destroy the tank. A water manometer will read accurately every time, and will 'fuse' if you accidentally try to push too much air into the tank, With a gauge, there's no 'safety valve'. I'm curious...
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    Drying out fuel tank

    The examples of using sealant on rusted steel tanks might not be applicable to aluminum. One big difference (other than the material itself) is that the rusty tank interior will be very rough, supplying a lot of 'teeth' for the sealant to grip. The stories about RVx tanks are very real; been...
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    Wooden floor size suggestion please?

    To meet the clear span goal, Are you familiar with steel-clad exterior doors, as used in the USA? 1.75" of foam, with very thin steel glued to each side. (image attached) Same concept as most plastic a/c these days (Glassair, Lancair, etc). I built a hangar addition using 5' long, 22" wide...
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    Virtual Sun n Fun

    Well, we should start with the obvious. What SNF specials are you offering? When pricing, remember that you didn't have to drive/fly across the country, or pay SNF for a booth, or pay employees to stand in the booth. ;-) My primary interest at the moment is ADSB-Out. uAvionix? How about it? Do...
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    "Thrust"

    The relationship among torque, rpm and HP are important to understand in general, but Billski was trying to tell you why the numbers could actually be different with the same engine. It's about how efficiently the prop can convert 'rotational HP' from the engine into air moving 'linear HP'...
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    BD-4

    On the subject of maintaining 'certified' status of an engine: I can't speak with authority to FAA's current position, but in the past, the very act of mounting the engine on an experimental a/c took it out of certified status, until at minimum, an A&P with IA signed the log stating that it...
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    Work rules / practices

    "Failure to communicate." ;-) Finn said that it's definitely in the RVx plans; you responded that it's not in 'the plans'. I responded with a quote from the RVx build manual. Then you clarified that it's not in *your* plans. I don't know what you're building, but assumed that it might be a...
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    Sun n Fun 2020

    I get it, and was reluctant to bring up politics. But politics is where most of the misinformation (euphemism for lie) is originating. Except the beer rumors; that's just corporate warfare. ;-) I'll try to be quiet now...
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    Sun n Fun 2020

    Proper sanitation is the *absolute minimum* level of response. Saying that's the 'most effective' tool is just perpetuating the head-in-the-sand mentality. As pilots, we let data drive what we do in the air and what we do when we're building; why are we disengaging our brains when it comes to...
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    Sun n Fun 2020

    You're probably as safe in your house as hers; it's interaction with the public that's hazardous. There are no *diagnosed* cases in your state. Not the same thing as no cases. Early (and continuing) refusal to allow widespread testing will be seen as the reason if we have a raging epidemic in...
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    Unadvertized secrert abilities

    You heard TV CRTs (as did I) because they weren't really ultrasonic; they ran at a bit north of 15,000 cps. And while I couldn't find any specs on the old ultrasonic motion detectors, I'm pretty sure they ran at roughly the same frequency (I could hear those, too). IIRC, bats operate up around...
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    Sun n Fun 2020

    Problem is, the people that are panicking and buying TP are not afraid of the virus; they're afraid of running out of TP. If they were afraid of the virus, they wouldn't be pushing & shoving each other in a crowd of hundreds of people, for TP. If they'd listened to health professionals...
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