Temperature / pitot heat

[DaveSims]

[quote]carb heat.

[Hagar]

P.S. ..I must ignore the fact that my Firefox Dictionary keeps telling me that there are NOT two "T"'s in Carburettor... ...!

.... ....!

I've told you many times before. Install the British English dictionary. https://addons.mozilla.org/en-US/firefox/addon/3366

[flaminghotsauce]

Good thread.

Just for clarification, carb heat doesn't take power from the engine. There is a cowl surrounding the exhaust which air is allowed to blow through, absorbing heat. This air is diverted into the carburetor. The hot air will change the fuel mixture, causing a slight loss of power. It's like a sudden density altitude change for the mixture. Less oxygen to burn, so the mix gets richer.

[Layne.]

In the A2A Piper Cub you get a bigger amount of power loss (not enough to stall) Is that usual in the Cubs??? or is it something i am doing wrong? :-?

[beaky]

Good thread.

Just for clarification, carb heat doesn't take power from the engine. There is a cowl surrounding the exhaust which air is allowed to blow through, absorbing heat. This air is diverted into the carburetor. The hot air will change the fuel mixture, causing a slight loss of power. It's like a sudden density altitude change for the mixture. Less oxygen to burn, so the mix gets richer.

Yes, but effectively, it takes power away... maybe 1-200 rpm, but it's very noticeable when you're already losing rpm because of ice in the carb inlet... those few seconds (if you're lucky) when the carb heat is on and the ice hasn't melted can be a little disconcerting.   :o

[beaky]

In the A2A Piper Cub you get a bigger amount of power loss (not enough to stall) Is that usual in the Cubs??? or is it something i am doing wrong? :-?

No, that's pretty normal for that little engine.

[Fozzer]

Many unexplainable Aircraft crashes can be put down to Carburettor icing, but the ice has already melted in the Carburettor by the time the investigation is carried out, so there is no firm conclusion... ...!

As a ground check before take off, apply full engine revs with the brakes applied, and select Carb Heat. The engine revs should drop by approximately 150 RPM to ensure the system is working correctly.

The dangers of Carburettor Icing during flight, frightens me!...(even in the Sim!)...so I regularly apply it!....!

Paul...G-BPLF...FS 2004... 8-)...!

... ...!

[DaveSims]

Good thread.

Just for clarification, carb heat doesn't take power from the engine. There is a cowl surrounding the exhaust which air is allowed to blow through, absorbing heat. This air is diverted into the carburetor. The hot air will change the fuel mixture, causing a slight loss of power. It's like a sudden density altitude change for the mixture. Less oxygen to burn, so the mix gets richer.

Yes, but effectively, it takes power away... maybe 1-200 rpm, but it's very noticeable when you're already losing rpm because of ice in the carb inlet... those few seconds (if you're lucky) when the carb heat is on and the ice hasn't melted can be a little disconcerting.

[flaminghotsauce]

Good thread.

Just for clarification, carb heat doesn't take power from the engine. There is a cowl surrounding the exhaust which air is allowed to blow through, absorbing heat. This air is diverted into the carburetor. The hot air will change the fuel mixture, causing a slight loss of power. It's like a sudden density altitude change for the mixture. Less oxygen to burn, so the mix gets richer.

Yes, but effectively, it takes power away... maybe 1-200 rpm, but it's very noticeable when you're already losing rpm because of ice in the carb inlet... those few seconds (if you're lucky) when the carb heat is on and the ice hasn't melted can be a little disconcerting.

[DaveSims]

Good thread.

Just for clarification, carb heat doesn't take power from the engine. There is a cowl surrounding the exhaust which air is allowed to blow through, absorbing heat. This air is diverted into the carburetor. The hot air will change the fuel mixture, causing a slight loss of power. It's like a sudden density altitude change for the mixture. Less oxygen to burn, so the mix gets richer.

Yes, but effectively, it takes power away... maybe 1-200 rpm, but it's very noticeable when you're already losing rpm because of ice in the carb inlet... those few seconds (if you're lucky) when the carb heat is on and the ice hasn't melted can be a little disconcerting.

[Splinter562]

The dangers of Carburettor Icing during flight, frightens me!...(even in the Sim!)...so I regularly apply it!....!

I've had carb ice form in cruise over mountainous terrain when flying through foggy conditions a little bit above freezing. I noticed the engine sound had changed from it's cruise setting, like the throttle had slipped back. I pushed to full throttle and got little RPM change. This immediately set of the carb ice flag in my head. I pulled the carb heat and within 15 seconds the RPMs were coming back up again. If it is caught early, it is not really a big deal. The warning signs are subtle but unmistakable.

The danger is having the ice form in a high-workload situation when the signs are harder to notice. This is why carb ice in the pattern is of particular concern. With the pilot's attention divided and constant power changes, it is easy to miss the warning signs. This is why it is always a good idea to pull carb heat with power reduction. Even if ice doesn't form 999 out of 1,000 times, the one time it does form you could easily not notice until the engine stops when turning base.

[Mtns2Skies]

[quote]

90

[Brett_Henderson]

[quote][quote]

90