> I had an episode on takeoff last week of reduced power. RPM stayed at > 2450 but rate of climb dropped from 650 to 400fpm. Thought
If your airspeed stayed the same and the RPM stayed the same, then the engine didn't loose power. If it lost power, the rpm would have dropped. If you lost power and lower the nose to pick up RPM, the airspeed would change. (Assuming fixed pitch prop) > it was carb > ice and pulled the heat.. Once at pattern altitude all seemed normal. > Back on ground at mag check and full static runup all seemed good. But If you can make the required static RPM, then the power is in the ball park. Your particular airplane has its own static rpm. If it hasn't changed, then neither has the engine's power output. Mine is always within about 25 RPM of the norm. > the next day after again a normal run up takeoff was only 200 > to 400 fpm > with passanger aboard.. Got her down fast.. What was the density altitude? How heavy was the passenger? Got any barn doors hanging out in the slip stream? (When was the last time you went to the propwash? ;~)) Check your static source. Check your VSI against your altimeter and a stopwatch. >Mechanic said it is probably a sticky valve?? If you stick a valve, you'll know it. The engine will run rough. > The Cont 90's will all have that problem sometime or > another That's like saying we'll all land gear up sometime. Don't believe it.
<<attachment: winmail.dat>>
