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afward

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afward last won the day on September 3 2019

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About afward

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  • Gender
    Male
  • Location
    Central Arkansas
  • Reg #
    N3475X
  • Model
    M20F

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  1. 21 gph of diesel (roughly the same weight as JetA) and 400 hp works out to a BSFC of .350 lb/hp-hr. That's pretty much in-range (slightly high) for a modern diesel, so I don't doubt the numbers are correct (or at least reasonably close). By comparison, your 310 hp engine has a BSFC of .555 lb/hp-hr at full power (std conditions). Turns out using fuel to cool the cylinders is quite inefficient... Compression ratio also has a massive role to play there.
  2. I think Elliot Seguin nailed it: To get a from-scratch project to that level of completion requires a personality that is very independent and ignores the nay-sayers. To have it be successful requires a balanced approach of knowing to heed the nay-sayers' advice. The implication of course being that Peter doesn't have enough of the latter.
  3. In fairness to Peter, he did accelerate well beyond his stated rotation speed before yanking it off the ground, almost as if the pitch trim was set too nose-down. The ground-effect tests haven't taken that much runway to lift off. That said, I only saw 420' AGL max (early in the "base->final" turn). The overheat was likely due to having the scoop closed, which is a "WTF?!" kind of decision to me... That's the understatement of the whole project, sadly.
  4. @Hank good point! Here's Peter's post: And one from someone with access to the tower cams: Enjoy!
  5. Whelp, it flew. I imagine Peter needs to buy a new pair of underwear after that first wing drop and subsequent oscillations, but otherwise he's safely back on the ground with an undamaged prototype. BT has more colorful commentary...
  6. For the money it'll take, you really are better off selling the E and buying a Missile or 305 Rocket (or really any M20 with a 6 cylinder except the M20L with original engine). Don't get me wrong, I've been dreaming of speed mods for my F, but lemme ask you this: On your typical mission, how much time would going 10kt faster actually save you? 15 minutes? That won't stop me from spending some on aero mods, mind you... The wife might, though...
  7. Loudness measurement is interesting. I am not an audio specialist so I'll defer to the experts. That said... Loudness is largely a measurement of how your ears will perceive sound energy. Our ears are not linear, so to provide a useful measurement the meter has to first measure the sound energy of each critical band (of frequencies), then simulate the relative sensitivity of the human auditory system by applying a different "weight" to each band. Once done, it then just sums the weighted energies of all the bands and converts to dB (notated as dBA on the meter since it is using the "A
  8. Ha, yeah. VASAviation _is_ a private pilot, but "ain't from around here" and tends to sensationalize a little (might just be a translation thing). I know he misses the transcription of radio calls fairly often, even if he gets the gist of it correct most of the time. Still pretty decent. Don't know the incident pilot or the plane, but a quick search shows the plane is a rental from Monticello Flying Club based at KCHO (Charlottesville, VA). Good job by all involved!
  9. The problem with attacking the infrastructure of the malware operators is twofold: 1) Most of it is operated by mafia or nation-states, and 2) A very large percentage of the infrastructure is itself hacked. Choosing to do so anyway opens you up to physical and legal risk beyond what you would otherwise expect. Tread carefully. It is likely that Garmin (or someone employed there) missed a security protocol somewhere. It's equally likely that the malware they were hit with uses an exploit not yet patched by the security or OS vendors (whichever is appropriate). People are fallible, and
  10. It's been quite some time since I saw it, but the newer research indicates intensity as the controlling factor for protecting night vision. In other words, if deciding between a dim white light and a mildly brighter red light, one should choose the dim white light because it'll be more useful AND will protect night vision better. Of course, don't leave the emitting element in line of sight no matter what tech / hue / color temp; That's guaranteed to do Bad Thingstm to your night vision.
  11. For the love of all things holy, why aren't you running full power?!
  12. No compelling reason. It's a little quieter, and a little smoother. It's also slightly more efficient (MPG) and slightly less tach time for the same distance. Mind you, conditions will easily nullify those last three, so there's that...
  13. Pretty much what everyone above says. I will assume you're asking about cross country flights here and want to get the best performance possible with good efficiency... Extended range legs or local "goofing off" flights will need different settings. I like to climb at 120 IAS, WOT/2700 and cruise at WOT/2400 above 6k MSL. On hotter days with heavier gross weights, climbs need to be at a higher IAS (128 is most efficient anyway, see Carson's Speed). I do use power boost (unfiltered engine induction) when I'm above the highest visible haze layer (min 3k AGL, per the POH) and not aro
  14. Probably all of those... "Bored person with money needs new hobby; Thumbing nose at airlines a bonus." As supporting evidence: The Part 135 folks are predicting a rapid recovery with an increase in bookings, even with the economic uncertainty. As long as the economy doesn't bottom out, GA will survive this pandemic stronger than it entered.
  15. For what it's worth, VASAviation's "radar" display is a recreation based on various tracking data websites. He takes audio from LiveATC, grabs the appropriate tracking data for the area & timeframe, and feeds it to a piece of software written specifically for the channel. That software generates the "radar" video. As I understand it, actual controllers helped get the software "close enough" so it looks like the real displays, but it's entirely a recreation based on public information.
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