See the extensive discussions on this topic in this group from about 1 month
ago. All you need is there.



"Rich S." wrote in message
...
Will someone please point me to the specification for effective carburetor
heat? A friend is in the midst of his flight testing and asked me how one
determines if the carb heat is working properly. All's I know is that if
the
rpm drops a hunnert or so on run-up, you say, "Check" and take off.

Rich S.