Quote:
Originally Posted by IvanK
The Merlin variants as modelled in COD are NOT subject to carburettor icing thats why no Carby heat or controls are present... they are not required.
How can this be ? Well the designers thought about it right from the word go. The SU twin barrel carburettor throats are jacketed. The Jackets around each carburettor throat were fed with Hot return flow engine coolant before it got to the radiator. This ensured that the Carby throats (and therefore butterfly) were always warm and prevented the formation of carburettor icing. See jpg of the carby. Item 18 shows the jacketing and warm fluid flow as the purple shading. The mounts for the Internal butterfly valves were also fed with warm scavenge oil shown in red.
From this Pub:
When rough running in cloud was discussed with the devs they indicated that it was caused by Propeller icing. Though IMO more work on conditions conducive to icing needs to be done in COD. In addition if we are seeing propeller icing then Airframe icing should be an issue as well ... it isnt at the moment. We see Ice build up on the canopy but not the airframe. |
Thanks Ivan, Tomcat for this great info. I had no idea such a clever design was built into the carb.
I stand corrected.