Questions about 737 and anti ice

[[IJL]Late]

Is it modeled in xplane that anti-ice (wing) and engine anti ice uses a significiantly more fuel?

If so, when is the best time to leave wing and engine anti ice on? Should it be all the time at cruise when temprature is less than 0 or only when flying through clouds.

If it doesn't use much more fuel is it better to just leave it on all the time since I tend to go afk a lot during flights. I only ask because I came back to my PC to find my aircraft almost stalling at 170knots and loosing atlitude because of ice build up when I wask AFK.

[🐉 Ðŗąçø 🐉]

Don't think it's modelled right now, not sure if it's going in 11.30 either.

Either way, anti-ice does use a lot more fuel.

You'll want to use engine anti-ice when flying through visible moisture when the TAT is below 10C or in icing conditions (i.e. snow, freezing rain etc.). Engine anti-ice should be turned off below -40C SAT.

Wing anti-ice uses a LOT of hot bleed air, and is best referred to as a de-icer, i.e. you wait for a build-up of ice first. Once you can visibly see ice on the wings, on the cockpit windshield, on certain probes or through computers telling you there's an ice build-up (none of which are simulated correctly in X-Plane yet), you would then want to switch on the anti-ice for a few seconds to shed the ice, then turn it off. Wing anti-ice in action

You want to prevent ice build up on the engine leading edges, but it's not so much of a problem on wings until you have lots of ice, particularly towards the wing tips where the airfoil is thinner.

[Pilotguy]

Pretty sure they will be adding seasons to the scenery before they do that.

[Prezidentas]

Originally posted by Pilotboy:

Pretty sure they will be adding seasons to the scenery before they do that.

I highly doubt that - scenery is visual, but temperatures still go below freezing.

Zibo 738 already has icing, however lack of visual icing cues that real pilots use is pretty bad.

Engine icing protection is used as anti-ice, but the wing icing protection is only used as a de-ice (since the ice could melt on the leading edge, but then re-freeze on the top and bottom of the wing as a smooth almost invisible ice that is impossible to remove in-flight).

Also turning on wing anti-ice should set the FMC into a special icing mode until the end of the flight, but I don't think it's simulated in zibo (definitely not in the default 738).

[🐉 Ðŗąçø 🐉]

Originally posted by Red Star Gopnik:

Also turning on wing anti-ice should set the FMC into a special icing mode until the end of the flight, but I don't think it's simulated in zibo (definitely not in the default 738).

I've had a message saying TAT ABOVE 10C if that's what you mean.

[[IJL]Late]

Yes the lack of warning light made me completely unaware of what was happening when I suddenly started loosing airspeed and stalling at 35,000ft luckily I was at my pc at the time. I guess some pilot instinct kicked in and imeadiatly thought about icing and hit those de icers on. And for record yes I use the zibo 737 mod.

Seasons would be a nice touch tho. It’s okay considering it’s summer rn but winter is coming :(

[Prezidentas]

Originally posted by 🐉 Ðŗąçø 🐉:

Originally posted by Red Star Gopnik:

Also turning on wing anti-ice should set the FMC into a special icing mode until the end of the flight, but I don't think it's simulated in zibo (definitely not in the default 738).

I've had a message saying TAT ABOVE 10C if that's what you mean.

Nope.

Positioning the WING ANTI–ICE switch to ON in flight:
• opens both control valves
• sets stall warning logic for icing conditions.
Note: Stall warning logic adjusts stick shaker and minimum maneuver speed
bars on airspeed indications. FMC displayed VREF is not adjusted
automatically.
Note: Stall warning logic remains set for icing conditions for the remainder
of the flight, regardless of subsequent WING ANTI–ICE switch
position.

[Prezidentas]

Originally posted by IJLLate:

Yes the lack of warning light made me completely unaware of what was happening when I suddenly started loosing airspeed and stalling at 35,000ft luckily I was at my pc at the time. I guess some pilot instinct kicked in and imeadiatly thought about icing and hit those de icers on. And for record yes I use the zibo 737 mod.

Seasons would be a nice touch tho. It’s okay considering it’s summer rn but winter is coming :(

I wonder what is easier - showing icing on windshield (zibo does show rain so it can't be that hard) or having ice detection system option installed:

[Option]
An advisory only ice detection system detects airplane icing in flight. The system
consists of a probe located on the forward left fuselage and advisory lights located
on the left forward panel.
When the probe senses ice build–up inflight, the ICING light illuminates. When
ice has previously been detected and the probe is no longer detecting ice, the
ICING light will extinguish and the NO ICE light will illuminate. The ICING light
and the NO ICE light do not illuminate simultaneously.
Note: Residual ice may remain on the window areas with the NO ICE light
illuminated.
The ICE DETECTOR light, located on the forward overhead panel, will
illuminate if the ice detection system fails. Illumination of the ICE DETECTOR
light also illuminates the MASTER CAUTION and ANTI–ICE system
annunciator lights.

The hard part would probably be realistic ice detection and its display as an ICING light or as a windshield "texture".