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 Post subject: Commanche: engine damage
PostPosted: Sun Jan 06, 2019 6:49 am 
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Airman Basic

Joined: Sat Jan 05, 2019 9:14 am
Posts: 2
Hello all,

I am a beginner, at least as far as non-simplified GA aircrafts are concerned. In my A2A Commanche I’ve got a problem, and maybe I would get it with other A2A aircrafts too:

Starting the engine, all is ok, but after some minutes the power goes back more and more. The idle power remains the same, but the full power gets lost. As if to move the throttle only to its half, but the Joystick input obviously is ok and the throttle in the virtual cockpit works well. At the end moving the throttle don’t show any reaction.

I can fix this by reset or overhaul the engine but a few minutes late the trouble starts again. Only by option “damage off” I can avoid this effect and fly without problems. So problem solved, but I in fact don’t want the engine to ignore damages, I better want me to avoid damages.

Watching tutorial videos, reading the manual, playing around with mixture or RPM all didn’t help. Maybe I got a helpful advice here.

Thanks and sorry for poor English.

Norbert


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PostPosted: Sun Jan 06, 2019 7:34 am 
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A2A Captain
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Joined: Fri Jun 06, 2014 1:06 pm
Posts: 8339
Location: United Kingdom
Hello Norbert - welcome to the A2A forums.

What you're describing sounds very much like the carburettor icing simulation within Accu-Sim. This is particularly likely if there was some visible precipitation or other simulated moisture in the air (e.g. clouds or fog).

For more info on this phenomenon, please see this article or at least take a look at the chart: Melting Moments: Understanding Carburettor Icing. The article uses quite a nice analogy to make the point that warmer air is able to hold more moisture than cooler air.

The 'fix' for carb icing is to use the carb heat selector on the panel. By default, it can be operated using the 'H' key.

Thanks,
Nick


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PostPosted: Sun Jan 06, 2019 12:15 pm 
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Airman Basic

Joined: Sat Jan 05, 2019 9:14 am
Posts: 2
Hi Nick,

thanks for you reply. I guess you are right and carburettor can solve the problem. But it needs additional knowledge what time and how long to use carburettor. On my today's flight I watched the engine carefully at any time, but on landing I got some problems with ice. Maybe I will use carburettor anytime, until I understand better.

Regards,
Norbert


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PostPosted: Sun Jan 06, 2019 12:43 pm 
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Chief Master Sergeant
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Joined: Mon Sep 02, 2013 7:30 pm
Posts: 3533
Location: Typically hanging around N07, 12N, KLDJ, KCDW
Try reading through this for guidance.

https://www.aopa.org/-/media/files/aopa ... EE2C281F6C

_________________
Flight Simmer since 1983. Private Pilot
Paramus Flying Club http://www.flyingclub.org


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PostPosted: Sun Jan 06, 2019 12:48 pm 
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A2A Mechanic
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Joined: Sun May 26, 2013 5:03 am
Posts: 4023
The link Nick posted has a rather good chart that shows the probability of carburetor icing. If you want to use carburetor heat as precaution, that is a good starting point. But in the simulator, the carburetor icing is rather easy to spot if you are watchful on your gauges. During calm phases of flight, you may use the heat as remedy when you first spot the effects from the ice.

Note that in A2A Comanche, you can effectively state that rain = carburetor icing, so whenever rain comes down in its liquid form, you can as well pull the heat all-out. :)

-Esa


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