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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › Cold weather Carbsmart
01-17-2009 12:33 AM  9 years agoPost 1
AaronJohnson

rrElite Veteran

mason,MI

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I am looking for some info from guys that have ran their CS in cold weather. Do you set the temp lower like say to the 90C setting when its below 35F? I know that most use 110C when its normal warm temps but I just wonder if running that high of temp would be bad in the winter due to the cold cooling air and maybe the CS trying overlean the mixture to achieve this higher cylinder temperature. I may just be worried about nothing. Any input?

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01-17-2009 12:52 AM  9 years agoPost 2
dogg5306

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Brussels, Belgium

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I would make an analogy with your car... in the winter it takes longer than in the summer to get the engine working at its optimal temp... but the optimal temp doesn't change... so if you're running your carbsmart at 110°c (the optimal temp that you've defined)... I would let that setup active.

That said, you should have set a Min and a Max for your mixture servo moves... and no matter what with a properly setup carbsmart your engine temp won't go higher than 110°c... so your engine is on safe side... even if there's 0°F temp outside...

The question you might be asking yourself is whether or not the engines that we use are handling well huge temperature change or is it safe to fly our helis during the winter...

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01-17-2009 01:30 AM  9 years agoPost 3
AaronJohnson

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mason,MI

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Well using the car analogy, we all know that in the winter or when the air is cold we must add fuel due to a more dense air charge. I am not 100% sure if the glow engine will run or rather "should run" at the same temp as it would is the summer temps with a PROPER fuel mixture. Being that a car's temp is controled by a thermostat it will run at the same temp as the summer however our glow engines are air cooled and also are very much temperature affected by mixture.

So if I phrase my question differently, Would it be better or best to set the temp in the CS lower in the winter due to the increased effect of the cooling air?

Also I 100% agree that a properly set up carbsmart will not be able to run the engine over lean. But at the same time the CS does not stay full lean in the summer because the engine will over heat if it does.

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01-17-2009 02:11 AM  9 years agoPost 4
SRH990

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Birmingham, UK

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I run the Carbsmarts in my Trex 600 & 700 at the same temperature all year round without problems. In my opinion a properly setup Carbsmart will have enough mixture range to cope with any external temperature I'm likely to fly in! The coldest flying session this winter has been -5C/23F

Steve -Trex 700N, Trex 600N, Raptor 550E, 450SE, Mini Titan, Logo 5003D, Beam E4

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01-17-2009 02:15 AM  9 years agoPost 5
AaronJohnson

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mason,MI

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cool thanks for the input!

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01-18-2009 03:05 PM  9 years agoPost 6
Jason channing

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Essex uk

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My 911 is aircooled and i don't touch the mixture ever.

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01-18-2009 09:43 PM  9 years agoPost 7
Pinecone

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Maryalnd

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What year 911? Most since the mid 70s are fuel injected and automatically adjust the mixture.

Terry
Blade CP Trex 450 SE
QJ EP8v2 EX Gaui Hurricane 550
Vibe 50 Bergen Intrepid Gasser

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