Turboprops????
Join Date: Jun 2001
Location: Surrounded by aluminum, and the great outdoors
Posts: 3,780
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just set TIT for cruise...847c if i recall correctly..rpm no need for change...cant do it in flight anyway...propellor automatically reduces it's own blade angle to accomodate power changes and maintain it's "on-speed" rpm..when flight idle is selected, the fuel control maintains a minimum fuel flow to prevent the propellor from driving the engine...prop rpm when on-speed is 1020rpm..the flight deck gauges read engine spool rpm of 13,820..but it's all connected directly..so doesnt matter which side of the gearbox you take the reading from...without getting too specific, certain bleed valve configurations on the engine could change if the prop were to malfunction and cause the rpm to decay, (droop is the term) and the results would be very undesireable...so the engine spool rpm is the one monitored by the flt crew...
