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Show HN: Aviation navigation log on $20 receipt printer

carloslagoa.com

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Re: Show HN: Aviation navigation log on $20 receipt printer

#91

Post by Scoundreller »

chaxor wrote: post #89
Scoundreller wrote: post #77

Earlier quoted context omitted.

Yes, but the avgas lead situation is primarily a problem for the people behind/under the aircraft, not inside the aircraft.

You still have to fill it up by touching and breathing in the fumes while pumping it into the tank, so not exactly, but you're right that it does affect others as well.

dunno about the evidence, but I kinda figured post-combustion lead is more atmospheric than pre-combustion lead. Elemental lead doesn't really absorb through the skin (and gas doesn't evaporate too well at low temperatures) as far as I know.

Re: Show HN: Aviation navigation log on $20 receipt printer

#93

Post by hexaga »

Scoundreller wrote: post #91
chaxor wrote: post #89

Earlier quoted context omitted.

You still have to fill it up by touching and breathing in the fumes while pumping it into the tank, so not exactly, but you're right that it does affect others as well.

dunno about the evidence, but I kinda figured post-combustion lead is more atmospheric than pre-combustion lead. Elemental lead doesn't really absorb through the skin (and gas doesn't evaporate too well at low temperatures) as far as I know.

Lead added to fuel is in the form of an organic compound, so I'd expect the opposite effect. Obviously there's more distribution post combustion, but from a bio-availability standpoint spraying tetraethyl lead around in equivalent quantities would be a much more severe problem.

Naively (without looking at data for concentrations in various environments), I could buy that people regularly handling / being around leaded aviation fuel are worse off than those breathing the (dilute) exhaust products.

Re: Show HN: Aviation navigation log on $20 receipt printer

#94

Post by andromaton »

Scoundreller wrote: post #78
palijer wrote: post #46

I've worked in a bunch of restaurants and now work with restaurant software (we're hiring some cool positions if you are interested [1]) The one thing I'd be a bit wary about here is heat making that paper unreadable. I've seen a bunch of kitchens intend to run thermal printers in kitchens, but had to switch to impact printers because how quickly the paper would turn dark in the ambient heat in the kitchen, plus the…

Worth reading this Brother study on thermal paper degradation: https://www.anixter.com/content/dam/Suppliers/Brother/White%... Worth looking at Figure 3 showing how different samples of thermal paper have vastly difference reactions to high temperatures. Once had a set of Aliexpress plastic water carriers take 6 months to arrive to me during COVID and it when it arrived, it seemed like the plasticizers from the carri…

We use high temperature paper (170F, 20% dark at 6mJ/mm²). It will not turn dark left many days in a truck dashboard in the summer in Texas. I once found a stack of 7 year old receipts and they were completely readable.

Re: Show HN: Aviation navigation log on $20 receipt printer

#96

Post by btgeekboy »

chaxor wrote: post #89
Scoundreller wrote: post #77

Earlier quoted context omitted.

Yes, but the avgas lead situation is primarily a problem for the people behind/under the aircraft, not inside the aircraft.

You still have to fill it up by touching and breathing in the fumes while pumping it into the tank, so not exactly, but you're right that it does affect others as well.

I realize this is an anecdote, not data, but after flying my own plane for 5 years and getting >500 hours of flight time, plus soldering off and on for 30 years with leaded solder, my lead levels were fine at my last physical. I don’t drink avgas or anything, but don’t take precautions other than attempting to avoid getting it on bare skin.

Re: Show HN: Aviation navigation log on $20 receipt printer

#97

Post by btgeekboy »

jfim wrote: post #5
carloslagoa wrote: post #2

Hi HN! Just a small script I wrote a few days ago, but I had 2 or 3 friends publish some blogs online and I got hella jelly --- so here's my submission, so at least I can say I made something and post it. Hopefully you like both planes and tech and very hopefully you find this an okay read :) Any spelling mistakes, bugs, issues, ethics, please do tell me about! Sorry if it looks rushed -- night is coming upon us and…

Not knowing much about aviation, are there concerns if the printed list falls off of the pillar?

I’d rather reach down in the plane and pick something off the floor than do the same in my car. Especially if the plane has a half decent autopilot.

Re: Show HN: Aviation navigation log on $20 receipt printer

#98

Post by dceddia »

pqdbr wrote: post #76
V99 wrote: post #45

Earlier quoted context omitted.

The innovation/future exists, but is not evenly distributed. For example Diamond planes [1] have: - The same G1000 (NXi) - A composite body - Jet-fuel burning engines adapted from recent Mercedes diesels - Computer control of that engine through one knob instead of managing the throttle/mixture/prop separately like cavemen - Crash testing, like impact absorbing seat structure and separately enclosed fuel tank modules…

Half a year ago I asked around about the price of a DA62 I’m Brazil and it would be in the range of 1.6M USD (8M BRL). Did the price you quote (600k USD) was for the single engine model? If so, how much would a DA62 cost you in the US?

Not cheap! Just checking on Trade-A-Plane and they're like $1.3m USD on the low end :/ https://www.trade-a-plane.com/filtered/search?s-type=aircraf...

A 2021 DA40 with Garmin glass is around $625K https://www.trade-a-plane.com/search?category_level1=Single+...

Re: Show HN: Aviation navigation log on $20 receipt printer

#99

Post by est31 »

clumsysmurf wrote: post #67
palijer wrote: post #46

I've worked in a bunch of restaurants and now work with restaurant software (we're hiring some cool positions if you are interested [1]) The one thing I'd be a bit wary about here is heat making that paper unreadable. I've seen a bunch of kitchens intend to run thermal printers in kitchens, but had to switch to impact printers because how quickly the paper would turn dark in the ambient heat in the kitchen, plus the…

Also, most thermal paper is high in BPA/BPS. https://www.pca.state.mn.us/business-with-us/bpa-and-bps-in-...

Banned in EU since 2020: https://eur-lex.europa.eu/eli/reg/2016/2235/oj

The first few months of 2020 were quite busy: they gave us blue receipts, covid, and brexit.

Re: Show HN: Aviation navigation log on $20 receipt printer

#100

Post by V99 »

pqdbr wrote: post #76
V99 wrote: post #45

Earlier quoted context omitted.

The innovation/future exists, but is not evenly distributed. For example Diamond planes [1] have: - The same G1000 (NXi) - A composite body - Jet-fuel burning engines adapted from recent Mercedes diesels - Computer control of that engine through one knob instead of managing the throttle/mixture/prop separately like cavemen - Crash testing, like impact absorbing seat structure and separately enclosed fuel tank modules…

Half a year ago I asked around about the price of a DA62 I’m Brazil and it would be in the range of 1.6M USD (8M BRL). Did the price you quote (600k USD) was for the single engine model? If so, how much would a DA62 cost you in the US?

Yes a new DA40NG is around $600k, as is a new Cessna 172. A new DA62 is well into $1.5m with the options you'd want if spending that kind of money, and a 2-year wait last I heard.

Meanwhile you could build something like a Velocity V-Twin well-equipped for under half a million. Paying for certified lawyering is expensive.

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