richard_trickel(at)yahoo.
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 Posted: Wed Mar 16, 2011 5:46 am Post subject: and off we go |
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The engineer types are starting to confuse me so I will just go flying. My head hurts but I love it
Rich
--- On Tue, 3/15/11, BlueSkyFlier <bleuskyfly(at)teledynamix.com> wrote:
From: BlueSkyFlier <bleuskyfly(at)teledynamix.com>
Subject: Re: KIS TR-1 Propeller
To: kis-list(at)matronics.com
Date: Tuesday, March 15, 2011, 10:02 PM
Just before I close the cupboard door ...
| Quote: | From postings earlier in this thread it appears that some may be under the impression that opening up the throttle when using less than top RPM will give immediate access to power. That is a dangerous notion not to be trifled with.
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Please be aware that once your RPM has dropped - there is no guarantee that you will be able to regain RPM (i.e. power). Propeller loading and remaining available power alone will determine if rpm will increase again or not.
For example, in the above diagram for 55 degree turn at 3500 feet the full throttle power at 3000 feet (for 125 hp engine) is shown as the lowermost diagonal rising line between 70 and 132 knots on the chart. Once the RPM has dropped below 2000 and the speed below 100 kt the load on the propeller will not allow it to speed up again even if you push the throttle to the wall - unless you can sacrifice altitude to reduce the load on the propeller.
The true (hidden) meaning of the 'full throttle' power curve lies therein that - despite full throttle - you can not access all the power your engine can produce at that altitude unless your propeller loading is such that it allows rpm to increase. And if you increase the prop load by trying to make the plane go higher you lose even more power. You all know the scenario ..
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