RealEngine v1.1, in the FSX Misc section

[teson1]

Thanks for the welcome!  [smiley=vrolijk_26.gif]

Looks excellent!

...I am wondering if you can sustain engine damage from idling below # rpm for a certain time period.
I know that when I was training, we were advised against idling below 1000 rpm due the carbon deposit issue, among other things, which can ultimately lead to at least a rough running engine. ...

Well Sean ... try it out 

(but make sure to pick a looong runway)

I actually considered including shock cooling, but the FS CHT simulation is just not sufficiently realistic for the time being. Brett has some good suggestions for tweaking the airfile though.

[Daube]

This is really a cool addition.
Yesterday I had not even the time to start FS unfortunately, but I can't wait setting up the gauges for some of my favorite planes.
It would be cool to see some customized set of gauges uploaded into the library.

[Fozzer]

The thing I miss most in the Flight Sims, is the adverse (fatal) effect of Icing on/in the Carburettor(s) on normally aspirated Piston Engines.
I regularly use Carb heat when conditions demand it, but it has little effect in the Sim...but it keeps me on my toes!

Paul...G-BPLF...FS 2004...FS Nav...and a warm motor!... 8-)...!

[Brett_Henderson]

The thing I miss most in the Flight Sims, is the adverse (fatal) effect of Icing on/in the Carburettor(s) on normally aspirated Piston Engines.
I regularly use Carb heat when conditions demand it, but it has little effect in the Sim...but it keeps me on my toes!

Paul...G-BPLF...FS 2004...FS Nav...and a warm motor!... 8-)...!

Yeah.. that would be a nice addition..

[teson1]

The thing I miss most in the Flight Sims, is the adverse (fatal) effect of Icing on/in the Carburettor(s) on normally aspirated Piston Engines.

That's an interesting suggestion... I didn't consider carb icing yet.

It should be pretty easy to throw together a module for carb icing based on ambient temperature and power setting.

Dew point/RH obviously plays a big role in carb icing as well, but I find no variable that would provide that parameter to an XML gauge. That would probably require FSUIPC/Simconnect/C gauge, if possible at all...

I'll see what I can cobble together.
Thanks for the suggestion.

Gunter

[Fozzer]

The thing I miss most in the Flight Sims, is the adverse (fatal) effect of Icing on/in the Carburettor(s) on normally aspirated Piston Engines.

That's an interesting suggestion... I didn't consider carb icing yet.

It should be pretty easy to throw together a module for carb icing based on ambient temperature and power setting.

Dew point/RH obviously plays a big role in carb icing as well, but I find no variable that would provide that parameter to an XML gauge. That would probably require FSUIPC/Simconnect/C gauge, if possible at all...

I'll see what I can cobble together.
Thanks for the suggestion.

Gunter

As a Motorcyclist and driver of Vintage Motor Cars, (also in my rare Cessna 150/152 flights), carburettor Icing is always up-most in my mind in cold, moist air conditions...>>>

http://www.pilotfriend.com/safe/safety/carb_icing.htm

Diving for the Airfield with the throttle closed on cold, damp days, is often a recipe for disaster without applying Carburettor Heat.. ...!
I fit a little warning light in my Sim Cockpits to advise me if the Carb Heat is on or off....I needs to be OFF for a last minute, aborted landing, full power, go-around!

I get used to fiddling with that little knob... ... ...!

Paul...G-BPLF....FS 2004...and a little light...(refreshment)... 8-)...!

[Daube]

Isn't FSX simulating the carburetor icing by default ?

[JBaymore]

Tesson1,

WOW.... amazing piece of work there.  THANKS for all the hard work.

Any possibility you can modify it eventually to work with commercial Air Transport jet engines of various types?

[teson1]

What should be the effect of carb icing?

Looked at it quickly and it seems there are several effects

Here's what I would plan:
- Icing tendency depends on temperature (more or less according to http://ibis.experimentals.de/images/car ... assl14.gif, but with no effect of humidity for the time being, i.e. no difference between a clear dry day and a damp english morning...).
With low power icing is more severe than with high power
Carburetor will ice a little faster with rich than with lean mixture (TBD)

- Effect would first be a loss in power, then engine running rough (skip) if carb heat is not engaged in time. Finally engine will cut.

- After engaging carb heat engine will first run more rough for some seconds, then run smooth and power will increase to normal levels within about 30 seconds.

Does this sound about right?
Any suggestions?

In particular I have a question regarding ground operations - is icing common on the ground? When - during Taxi only, or also during idle? Do pilots normally take precautions on the ground to avoid icing? What precautions?

Thanks.

Gunter

[teson1]

Isn't FSX simulating the carburetor icing by default ?

I don't know about FSX, but as far as I have heard in FS2004 the carb icing effect is dumbed down to a level where it rarely occurs. I have never experienced any carb icing in any way.
I think it may make sense to have a special module which is less forgiving (but maybe carb icing conditions really are that rare...).

[Brett_Henderson]

If you talk to enough pre-fuel-injection pilots, they'll swear that carb icing can happen at ANY temperature/humidity... and they'll tell you that it didn't happen when it should have.



Regardless..  the MSFS engine doesn't model humidity.. so my advice would be to allow it to happen below a certain temp (ala 70F), when MP goes below something like 18" ?

You describe the effects close enough for simming. With a fixed-pitch airplane, it will start out as a loss of RPMs..  with a constant-speed prop, it will show up as reduced MP.

For simming, I'd ignore mixture settings.

The event itself is just like when you used canned air to clean your computer and get frost on the can..  When a gas goes from high-to-low pressure, heat is absorbed and moved away from where the pressure differential occurs. Closing a throttle cause that in the carb.

The ice literally chokes the airflow (worsening the whole thing).. and even before it chokes the engine dead.. it can ice-over where fuel enters the system.

[olderndirt]

The worst place I ever found for carb ice is a few hundred feet below the bases of building cu.

[Daube]

Isn't FSX simulating the carburetor icing by default ?

I don't know about FSX, but as far as I have heard in FS2004 the carb icing effect is dumbed down to a level where it rarely occurs. I have never experienced any carb icing in any way.
I think it may make sense to have a special module which is less forgiving (but maybe carb icing conditions really are that rare...).

Definitely !! 

[Fozzer]

Pitot Tube icing works very well in FS 2004.

The Air Speed Indicator suddenly reading zero is a good indicator that Pitot Tube Heat requires applying....quickly!

I generally keep a wary eye on the Outside Air Temperature Gauge (OAT).

Carburettor Icing is very common on normally aspirated Piston Engines..Aircraft/Motor Cars/Motorcycles, etc....>>>>

http://www.pilotfriend.com/safe/safety/carb_icing.htm

Many unexplained fatal air crashes can often be attributed to Carburettor icing, the problem being, that the ice will have melted by the time the aircraft has been inspected, and the evidence is lost!

My 1931 Riley 9 Brooklands Racing car suffered badly from Carb icing in its twin SU Carburettors during Winter. The body of the Carburettor would shrink with the cold, trapping the needle Piston, which interfered with the Petrol/Air mixture which then generated Ice within the venturi and caused the engine to run rough, and often cut-out. (It was not heated by the Exhaust Manifold as in passenger cars).
My Vintage Motor Cycles suffered from the same problem during cold, damp weather (fog).

Regular application of Carburettor Heat on your Aircraft can be a life-saver!... ...!

Paul...I hate the cold as much as my Carburettors do!... .... ....!

[teson1]

Thanks guys for the comments.