Note: watch Mike's wonderful videos in 2x speed. You're welcome

@manifold1476

2 жыл бұрын

1.5x works for me.

@kevin_6217

2 жыл бұрын

Most of the time I wish there was a 3x...

I heard detonation in my 152 on one hot summer day. I remember wondering what was rattling in the panel as I climbed out, but ignored it because troubleshooting a rattle at 1000 agl seemed like a bad idea. Next thing I knew one CHT had shot up to about 600F, so pulled power to idle and made a downwind landing. The badly pitted piston is sitting on my desk right now as a reminder to always have a good plan B.

17 likes..... Nowhere near as many as there should be. I love this guy, you should too!

Mike I was Always taught 50+yrs ago to pour a small sample on finger or palm and BLOW IF it after evap."feel" it JET A leaves a oily residue , Best practice; be there B4 fuel starts pumping.

Another tip, very simple but for that reason, easy to overlook: don't just ask for fuel, or say "fill 'er up". Say "I need some 100LL" or whatever you need.

@paulraymond3622

2 жыл бұрын

Good move

I'd love to see a whole webinar of Mike's thoughts on 100UL

I have locking fuel caps. Previous owner had a friend who died after a take off incident- suspected fuel contamination. I recently had to replace a fuel cell in my A36 because of likely fuel gun damage by out FBO friends….. so i screwed up by giving the keys away and letting this happen. Id push back on mikes comment as my locking fuel caps ( going forward…used correctly by me) ensure that only i can open them , therefore supervise at a minimum the fueling ( right fuel, no ramming the gun nozzle into the bladder and damaging it…..and i can only open 1 fuel cap at a time => no rain/ debris can get into the other side as it cant be open when i am not there. Mikes incident could not have happened if he had locking caps and the key was with him in the bathroom! Side note - huge Mike Fan, evidence and logic based Reliability Centered maintenance thinking is a sadly rare thing.

Off topic, I know, but it might be interesting. In the 1970's when I was helping my cousins on a large wheat farm in NSW, Australia. They had an old "war" vintage tractor that was designed to run on kerosene, which was very cheap back then. It had two fuel tanks, one for kerosene and a small one for gasoline. You would start on gasoline, let it warm up, then open the kerosene tank and shut off the gasoline. The fuel burned really hot and the exhaust manifold (cast iron) would turn red, orange, yellow and then almost white, with waves of heat clearly visable. When we stopped for morning tea or lunch we would stand alongside the exhaust manifold in winter to keep warm. It was toasty warm!

Extract from The Airplane Flying Handbook: Sufficient fuel should be drained from the fuel strainer quick drain and from each fuel tank sump to check for fuel grade/color, water, dirt, and odor.

Somewhat related I drive a VW TDI turbo diesel. Putting gas in the tank and driving will be a $6000 mistake. I never made the mistake and went and got the service bulletin. The gas nozzle is smaller than diesel so you can't a simple size restrictor. The solution is a guard that allows a diesel nozzle in and to open a flap. If you put a gas nozzle in it will not trip the flap and block the opening.

G,day from Quarantine house lockdown Sydney Australia. Thankyou for explaining a very serious issue that could be made by a simple mistake. 🌏🇦🇺

@b100ka

Жыл бұрын

I hope the lock down is over by now. Dont give u the ship mate

In the turbine powered aircraft I fly, for emergency alternate fuel we can use aviation gasoline that meets MIL-G-5572. We have a 6 hour operating limit on AVGAS before the aircraft is grounded requiring maintenance action. In addition to pure AVGAS, for operating at temperatures less than 4 degrees C, we can mix AVGAS and jet fuel 1 part AVGAS to 2 part jet fuel. There are restrictions for operating the engine, but some turbine engines are capable of running on mixed or completely different fuels. It’s not that way with piston engines.

Most jet engines that I’m aware of have Avgas or 100LL as an alternate or emergency fuel, with some performance penalties.

If the weather is cold, the av- gas will not evaporate.

I haven't watched this yet, so I wonder if there will be mention of the Sacramento Executive Airport incident. Many damaged engines, and fraud on top of that. Edit: yes. That's the incident in northern California Mike mentions in the answer to the question at 29:26. The fraud happened when Chevron asked people who had bought fuel there to submit a fuel receipt for the timeframe in question to get a rebuild. There were people selling receipts for a sizeable fraction of the price of a rebuild.

Someone needs to find a hydrometer suitably graduated so that the difference in density makes the mixing of fuels obvious and even quantifies the mixture. lets face it a suitable hydrometer could be graduated in ratios of fuels. most people would fly at 1% A1 but 2, 5, 10% .... A small plastic ball with a density of 5.95 pounds per gallon would sink in gasoline but float in a mix or 100% jet fuel. I have seen 3 plastic balls use to indicate sg hence state of charge of lead acid batteries, so the principal is well proven.

Lol today I had yet another student smell Jet A..............!!!!!!!!!! As all of my students for the last 22 years.

@PatrickJWenzel

2 жыл бұрын

I had to have another look at the material SDS for Jet A1 before I posed this question... You make your students smell Jet A1?

@timthesandman454

2 жыл бұрын

It's all about quantity. One sniff of this over a lifetime isn't going to hurt anybody. It's a hydrocarbon, many of which are bad for people including diesel, kerosene, and gasoline. I wouldn't advise breathing high concentrations of vapors from any of the above fuels for any significant length of time, but an occasional sniff won't do much of anything.

@PatrickJWenzel

2 жыл бұрын

@@timthesandman454 I don't disagree with what you're saying one bit. I'm thinking more from a litigation perspective. Maybe I'm overthinking it.

@hamdude2109

2 жыл бұрын

@@PatrickJWenzel Yes, You are. Now we will have to sign more waivers because we need to smell something(for educational and safety purposes) that might be bad for us.

@PatrickJWenzel

2 жыл бұрын

@@hamdude2109 My caution comes from the fallout of the Royal Australian Air Force F111 Deseal/Reseal investigation. Perhaps worth a Google search and read for anyone sitting on a high horse.

33:20 probably running rich

Dear Mike: I think Jet A effects on a gasoline engine would not cause detonation. Most probably, the results would be some clogging up of the fuel injections / Carburator system. Jet A powered reciprocating engines use very high compression rations to achieve detonation, as no spark is needed to ignite. Other than that miss concept, as usual, your presentations are great.

@tow.JanWinnicki

2 жыл бұрын

You don't know what you are talking about. Many examples of fatal accidents due to mis-fueling spark-ignition airplane engines with Jet A as the engines fail catastrophically due to detonation.

@johnelliot9654

2 жыл бұрын

@@tow.JanWinnicki There are many more examples of vehicle engines suffering the same fate. The end result is fuel system contamination, due to the oily texture of Kerosine, Diesel or Jet A. All being the same cut of fuel. On the other hand, if you fuel a Diesel vehicle with gasoline.. Kaboom! you have immediate early detonation and engine failure. But not so the other way around.

@tow.JanWinnicki

2 жыл бұрын

@@johnelliot9654 First. You do not know what you are talking about. Second. We are talking here about aviation engines not car engines. Third. We are talking about contamination not replacing one fuel completely with another. Did you even listen to the presentation?

@johnelliot9654

2 жыл бұрын

@@tow.JanWinnicki OK fine. Have a nice day.

@AntonEMaes

2 жыл бұрын

I thought something similar but I think where the confusion comes in is that while Kerosene will work in a diesel engine it is not diesel and can run in a spark ignition engine. The octane rating is also very low. In a diesel cycle engine you don't care because you're introducing the fuel at the point in the cycle via direct injection. kzread.info/dash/bejne/f4igsMyLdLKwZag.html

47th 👍

This guy talks so slow it's just painful to try to listen to it.

@brnmcc01

Жыл бұрын

change the speed to 1.25x is about perfect :)