wireweinie
FOUNDER
Palmer, AK
no carb heat connected on the plane,
Is that a thing? I always thought that was required, at least with a carb. And even with fuel injection it becomes your 'alternate air' source.
Web
no carb heat connected on the plane,
You're not a doof. If you do it again, yes you are. Good lesson learned, safely.Then there is the doof like me who, last week as I entered the pattern, reached down to pull out carb heat. Engine stopped. I looked down and saw it was mixture I had pulled out. Shoved it back in and everything came back to normal.
Still not fully used to the airplane. The knobs are next to the throttle on both sides and they feel the same. One of those human factors things that people didn't worry about in 1946, I guess.
Then there is the doof like me who, last week as I entered the pattern, reached down to pull out carb heat. Engine stopped. I looked down and saw it was mixture I had pulled out. Shoved it back in and everything came back to normal.
Still not fully used to the airplane. The knobs are next to the throttle on both sides and they feel the same. One of those human factors things that people didn't worry about in 1946, I guess.
Then there is the doof like me who, last week as I entered the pattern, reached down to pull out carb heat. Engine stopped. I looked down and saw it was mixture I had pulled out. Shoved it back in and everything came back to normal.
Still not fully used to the airplane. The knobs are next to the throttle on both sides and they feel the same. One of those human factors things that people didn't worry about in 1946, I guess.
I was hopping rides years ago in a homebuilt Great Lakes 2T1A powered with a 180 hp Ranger. I had a 70+ friend in the front seat. He wasn't wearing a flight helmet and his large ears were sometimes flapping in the wind. I discovered that if I used a little left rudder his right ear would flutter and visa versa for the left. I was amusing myself with his ear exercises while coming low over the west ridge of the airport and reached down and pulled the carb heat knob. Everything went silent for a few seconds till I realized my mistake.
Glenn
Has anyone ever had carb ice shut then engine down? Engine stumbled for a second or two then off…pulled carb heat, pumped gas a time or two, the engine re-started…
Evening flight
45-50 degrees,
1000’ AGL- 2500’ Above Sea Level
Humidity 70-80%
Not raining…no visible moisture…clear evening.
80 mph ground speed…@2350 rpm
I put a brand new Marvel carb on my C90 at last overhaul. Flew it for a couple hundred hours last year without any incidences of carb ice. Had to get it overhauled a few months ago due to some water accumulation and rust in the accelerator pump circuit. After overhaul I'm getting carb ice pretty regularly. Haven't quite figured that one out yet.
What type of fuel? I don’t think carb heat would work very well with the engine off, except as alternate air. I have a friend that had very similar happen in a borrowed airplane that the owner had been burning ethanol unleaded in (he tested the fuel after and lots of water settled out). The engine may have swallowed a big enough amount of water to quit. It also restarted and then he needed carb heat, we assumed because the water in the fuel iced in the Venturi easier than fuel without water/ethanol.
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What type of fuel? I don’t think carb heat would work very well with the engine off, except as alternate air. I have a friend that had very similar happen in a borrowed airplane that the owner had been burning ethanol unleaded in (he tested the fuel after and lots of water settled out). The engine may have swallowed a big enough amount of water to quit. It also restarted and then he needed carb heat, we assumed because the water in the fuel iced in the Venturi easier than fuel without water/ethanol.
Sent from my iPad using SuperCub.Org mobile app
Ethanol gas would have absorbed the water
Glenn
Because the fuel is injected at the intake valve inside the warm cylinder head. The cooling effect of the vaporizing fuel is not in the butterfly/venturi area. There is always the possibility of ram ice accumulating, though this is minimal.We’re all taught that air temp drops as air pressure drops after passing through the venturi. Simple science. We’re all taught carb icing probability is relative to a relationship of OAT and humidity. That said, why don’t fuel injection servos ice up?