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"Jay Honeck" wrote in message
ups.com... ... As RPMs dropped below 1000, the "shock-cooling alarm" suddenly went off, flashing its dire warnings that EGTs had dropped beyond (and faster) than recommended limits. (I can't remember what the threshold is for that alarm -- it's preset.) ... Jay Honeck What happens when you do a normal pattern? Given your explaination, I would assume that you get a shock cooling alarm everytime you do power reductions as part of a normal landing. If not, use the same technique at altitude to get into a power idle glide. I don't have any engine analyzer. But, on a normal approach, I will reduce throttle in two or three steps to get to 15" or 16". That supports my minimum, flaps up, holding altitude speed. Then, with gear out and flaps down, I'm descending on extended downwind, base and final, with the power gradually coming off to flare. (I'm not describing this as the ideal technique. I'm stating it so that others can say - "Are you crazy! That technique is an engine killer.") Engine out practice for me is very similar. From cruise, reduce throttle in a couple of steps to 15". Maintain altitude. Then gradually pull off power pitching over to maintain best glide. You're right, it's all very methodical and does not present a sudden engine loss scenario. Maybe only do that once or twice a year. For me, the engine out practice is all about picking the spot and making it without power. Practicing that without instaneous loss of engine power still has a lot of value. Now, in my Lake, I've got other concerns. Several times a year and during every annual insurance checkride, a sudden loss of engine power on takeoff is a required demonstrated skill. With a top-mounted, pusher engine, in a takeoff configuration, close to the ground, sudden engine loss and anything but immediate response is deadly. The sudden loss of nose down thrust will cause pitch up at a speed already close to stall with not much altitude to recover. An immediate (and I mean immediate) push over is absolutely critical. Critical enough that practice is necessary regardless of any harm it might be doing to the engine. So, for me, the engine-out on takeoff gets me practice responding quickly. The more gradual throttle to idle and then a practice off-field approach completes the scenario. ------------------------------- Travis Lake N3094P PWK |
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Travis Marlatte wrote:
"Jay Honeck" wrote in message ups.com... ... As RPMs dropped below 1000, the "shock-cooling alarm" suddenly went off, flashing its dire warnings that EGTs had dropped beyond (and faster) than recommended limits. (I can't remember what the threshold is for that alarm -- it's preset.) ... Jay Honeck What happens when you do a normal pattern? Given your explaination, I would assume that you get a shock cooling alarm everytime you do power reductions as part of a normal landing. If not, use the same technique at altitude to get into a power idle glide. I don't have any engine analyzer. But, on a normal approach, I will reduce throttle in two or three steps to get to 15" or 16". That supports my minimum, flaps up, holding altitude speed. Then, with gear out and flaps down, I'm descending on extended downwind, base and final, with the power gradually coming off to flare. (I'm not describing this as the ideal technique. I'm stating it so that others can say - "Are you crazy! That technique is an engine killer.") Have you killed any engines yet doing this? Matt |
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