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What does that mean, Ron? Paul

Unfortunately, I believe he passed in 2009, age 84. Mike Busch could probably confirm that. Paul

Dan appears to be making the common mistake of confusing *inspection* criteria of a fuel with *core properties* of the fuel. The core properties are generally established in this case by full-scale testing on aircraft engines... then, a diligent engineer will identify which inspection criteria...

There's actually no reason to ever disconnect the UAC cable from the headset. That makes it tough to lose!

It's not even micro-USB, it's an obscure Apple connector. But I'm told the next gen USB-C meets LightSpeed's needs, whatever those are... so in a year or so, they'll transition to USB-C. Paul

What do you mean by starved itself? The oil pressure is low? How low?

Not sure getting a senator or two on your side constitutes convincing the government, but they did achieve their aim for this round. Of course, that CEO was just sued for embezzling money from his company... that will at least be a distraction, I should think. You have to choose "the help"...

Part 2: Either technology, hardening the valve seats *or* retarding the timing to reduce intracylinder pressure, would resolve the problem. What it comes down to is that the way the engines are operated, the engine octane requirement is greater than what was supposed during the 1962...

Not sure where Ben is going here... 100LL has a lean rating of 100 and a rich rating of 130. If Ben is saying that unleaded fuel *also* needs a rich rating of 130, he is correct. If, as some have said, he's saying unleaded fuel needs a HIGHER rich rating than leaded fuel to avoid detonation...

https://www.aircraftspruce.com/catalog/elpages/6070amp.php Or, similar from Digikey or Mouser. I have an Arctic Air too... need to install it! Paul

I thought the thyroid cancer was a concern from animal studies. Is their human evidence of same?

Ozempic is an injectable. In fact, the fancy dose-calibrated pen is the reason for short supply... apparently difficult to scale up production. Most Semaglutide use is injected. There are oral forms, but dose effectiveness seems to vary widely person to person, making administration...

What brand and model of regulator is installed? I'm guessing you have a modern regulator with integral over voltage (OV) protection... but someone may have overlooked the factory OV relay buried in the wires behind the circuit breakers. This intermittent action is how they fail. Could be field...

That is interesting... but this article is even more interesting... not just blood lead levels of aviators, but an actual health impact: a greater risk of death from heart disease. doi: 10.3390/ijerph19105941. Cardiovascular Mortality and Leaded Aviation Fuel: Evidence from Piston-Engine Air...

Well, that's an unfair characterization. There's a lot of decent science looking at the prevalence and effects of lead. Hello Joel, I guess it depends on how you define supply chain. There are currently 8 refineries in North America blending 100LL. It seems very unlikely to me that those 8...

Folks have conducted studies with the data we have... which includes blood lead levels of impoverished children nationwide. Someone would have to fund gathering aviation folk blood data, and the folk would have to cooperate. But the driving force is small... unlike for children under 5, where...

If one plug is not firing, CHT will be slightly lower, EGT higher as the combustion process will be late, allowing less time for gas to expand/cool. Sounds like valve issue. IIRC that engine requires periodic valve adjustment, no hydraulic tappets. Needs an adjustment.

The producer of G100UL will provide the purchaser a Certificate of Analysis that demonstrates that the batch of fuel meets the specification... in this case, GAMI's proprietary G100UL specification. That spec, like the D910 spec for 100LL, dictates properties as measured by about 40 ASTM...

I think that's on the GAMI website... the weight of 100LL varies a bit, from 5.8 to 6.1 pounds per gallon. GAMI's fuel will be about 6.3 pounds per gallon, so roughly 5% heavier. But it contains 3% more BTUs per gallon, which mitigates some of the extra weight. If you read the AOPA or Aviation...

Yes, I've edited my note... no standard for 100 octane unleaded avgas. They've only been working on it 33 years... so patience, grasshopper! :) FWIW, Phillips 20W50 multi-vis aviation oil was introduced in the 1980's without an ASTM spec also... and nominally required an STC to use in the...