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									Aerodynamics - Bob Tait Aviation Theory Forum				            </title>
            <link>https://bobtait.com.au/community/aerodynamics/</link>
            <description>Bob Tait Aviation Theory Discussion Board</description>
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							                    <item>
                        <title>Passed Aerodynamics!</title>
                        <link>https://bobtait.com.au/community/aerodynamics/passed-aerodynamics!-8032/</link>
                        <pubDate>Thu, 27 Nov 2025 06:41:59 +0000</pubDate>
                        <description><![CDATA[Thanks to Bob I passed first crack with 83%, 

I went through the questions a little fast at first and was a victim of the &#039;startle&#039; effect, but after going through the questions again I m...]]></description>
                        <content:encoded><![CDATA[Thanks to Bob I passed first crack with 83%, 

I went through the questions a little fast at first and was a victim of the 'startle' effect, but after going through the questions again I managed to shape up and change some answers, this exam was the most obvious RTFQ. One of which I changed on my third time checking, due to the length of question. A few on wake turbulence that I got wrong, so make sure you have those in the bank before sitting. All in all, not bad at all!
See you all in General Knowledge, for a crack before the exam centre goes on a Christmas break.   

Thanks Again Bob!]]></content:encoded>
						                            <category domain="https://bobtait.com.au/community/aerodynamics/">Aerodynamics</category>                        <dc:creator>Joshua Guyer</dc:creator>
                        <guid isPermaLink="true">https://bobtait.com.au/community/aerodynamics/passed-aerodynamics!-8032/</guid>
                    </item>
				                    <item>
                        <title>Aerodynamics Fails</title>
                        <link>https://bobtait.com.au/community/aerodynamics/aerodynamics-fails-7993/</link>
                        <pubDate>Thu, 14 Aug 2025 11:32:26 +0000</pubDate>
                        <description><![CDATA[Hi everyone ! I just had my second attempt and my score got worse. 
From the first attempt I decided to know the bob Tait book in and out to have a better chance of passing. 
But NO. 
I c...]]></description>
                        <content:encoded><![CDATA[Hi everyone ! I just had my second attempt and my score got worse. 
From the first attempt I decided to know the bob Tait book in and out to have a better chance of passing. 
But NO. 
I can now see that the questions in the exam is so different than the book. Maybe 55% is similar to Bob Tait but the rest forget about it.
Good tip is to look up Part 61 Manual of standards Schedule 3 ! look every single thing up and GOOGLE IT. Write it down and focus on that.. 
Be course Bob Tait cover covers everything but when you sit exam you be like eeeeeeh this is not what i was reading about.]]></content:encoded>
						                            <category domain="https://bobtait.com.au/community/aerodynamics/">Aerodynamics</category>                        <dc:creator>Patrik</dc:creator>
                        <guid isPermaLink="true">https://bobtait.com.au/community/aerodynamics/aerodynamics-fails-7993/</guid>
                    </item>
				                    <item>
                        <title>Aerodynamics tutor</title>
                        <link>https://bobtait.com.au/community/aerodynamics/aerodynamics-tutor-7592/</link>
                        <pubDate>Fri, 17 Jan 2025 14:28:49 +0000</pubDate>
                        <description><![CDATA[Hi All, I have an exam booked in on the 24th of January (in 6 days) I’m wondering if there are any tutors in melbournes west or even someone who can contact me on zoom. I need help with aero...]]></description>
                        <content:encoded><![CDATA[Hi All, I have an exam booked in on the 24th of January (in 6 days) I’m wondering if there are any tutors in melbournes west or even someone who can contact me on zoom. I need help with aero, it’s my last subject and now open for me to do (after failing 3 times) unfortunately I have to do it on the 24th. Please let me know if anyone can help. Thank you!]]></content:encoded>
						                            <category domain="https://bobtait.com.au/community/aerodynamics/">Aerodynamics</category>                        <dc:creator>Sukh</dc:creator>
                        <guid isPermaLink="true">https://bobtait.com.au/community/aerodynamics/aerodynamics-tutor-7592/</guid>
                    </item>
				                    <item>
                        <title>CPL Aero | INERTIA &amp; flight path</title>
                        <link>https://bobtait.com.au/community/aerodynamics/cpl-aero-|-inertia-/?-flight-path-7492</link>
                        <pubDate>Fri, 10 Jan 2025 09:00:55 +0000</pubDate>
                        <description><![CDATA[Can anyone please elaborate or explain the intent/purpose of question 2 (of Exercise A6 on page 147). (photo below/attached) .

The answer s...]]></description>
                        <content:encoded><![CDATA[Can anyone please elaborate or explain the intent/purpose of question 2 (of Exercise A6 on page 147). (photo below/attached) .

The answer seems to have little correlation with the question ... that is, the answer is about INERTIA and the flight path, yet the question is asking what 'caused' the angle of attack to increase ... when you've just been told that the nose was raised ... 

There is clearly something to learn here but I don't know what I'm missing.

"Should?" the question be better written, "what would happen to the flight path if the nose was raised and the angle of attack was increased ... to which then the answer is not even correct (imho), or is it correct for 1 or 5 or 10 seconds??? because normally raising the nose and increasing the angle of attack DOES change the flight path UP ! (just like turning rudder/ailerons changes flight path LEFT/RIGHT).  

 Inertia.jpg]]></content:encoded>
						                            <category domain="https://bobtait.com.au/community/aerodynamics/">Aerodynamics</category>                        <dc:creator>Tim</dc:creator>
                        <guid isPermaLink="true">https://bobtait.com.au/community/aerodynamics/cpl-aero-|-inertia-/?-flight-path-7492</guid>
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				                    <item>
                        <title>Help with Aero</title>
                        <link>https://bobtait.com.au/community/aerodynamics/help-with-aero-7489/</link>
                        <pubDate>Tue, 07 Jan 2025 20:08:45 +0000</pubDate>
                        <description><![CDATA[Hi all, I have failed aero 3 times and it’s now unlocked and my last subject, got 62%, 65%, and 65%, just wondering if anyone used the ppe cada subject, used bob Tait books for the 3 attempt...]]></description>
                        <content:encoded><![CDATA[Hi all, I have failed aero 3 times and it’s now unlocked and my last subject, got 62%, 65%, and 65%, just wondering if anyone used the ppe cada subject, used bob Tait books for the 3 attempts and now looking at using atc, just need help with it, any information or help provided is appreciated.]]></content:encoded>
						                            <category domain="https://bobtait.com.au/community/aerodynamics/">Aerodynamics</category>                        <dc:creator>Sukh</dc:creator>
                        <guid isPermaLink="true">https://bobtait.com.au/community/aerodynamics/help-with-aero-7489/</guid>
                    </item>
				                    <item>
                        <title>Aerodynamic exercise A3 Q28</title>
                        <link>https://bobtait.com.au/community/aerodynamics/aerodynamic-exercise-a3-q28-7487/</link>
                        <pubDate>Sat, 04 Jan 2025 14:29:53 +0000</pubDate>
                        <description><![CDATA[A bit confuse with the correct answer stated at the back is B instead of D. 

The statement “more power is needed to maintain level flight with a reduced indicated airspeed” sounds like te...]]></description>
                        <content:encoded><![CDATA[A bit confuse with the correct answer stated at the back is B instead of D. 

The statement “more power is needed to maintain level flight with a reduced indicated airspeed” sounds like telling me that the aircraft is travelling in the reverse command region which should be the region behind the minimum total drag isn’t? 

However, on the other hand I do understand that outside the maximum endurance speed, we are using more power anyway, so it sounds like both of them are correct to me……]]></content:encoded>
						                            <category domain="https://bobtait.com.au/community/aerodynamics/">Aerodynamics</category>                        <dc:creator>Jacky </dc:creator>
                        <guid isPermaLink="true">https://bobtait.com.au/community/aerodynamics/aerodynamic-exercise-a3-q28-7487/</guid>
                    </item>
				                    <item>
                        <title>Weight &amp; Balance Envelope - Takeoff vs Cruise</title>
                        <link>https://bobtait.com.au/community/aerodynamics/weight-/?-balance-envelope---takeoff-vs-cruise-7445</link>
                        <pubDate>Thu, 12 Sep 2024 16:54:17 +0000</pubDate>
                        <description><![CDATA[Is it correct to say the W&amp;B envelope as published in the AFM (and as calculated by electronic means) is valid for takeoff and landing, but will actually be a larger envelope (but not publis...]]></description>
                        <content:encoded><![CDATA[Is it correct to say the W&B envelope as published in the AFM (and as calculated by electronic means) is valid for takeoff and landing, but will actually be a larger envelope (but not published) in cruise due to the increase in airspeed, and hence an increase in lift (force, up or down) achievable by the control surfaces....? Asked in relation to a passenger moving from a middle seat to the rear of the aircraft if the CoG is close to the aft limit of the envelope.]]></content:encoded>
						                            <category domain="https://bobtait.com.au/community/aerodynamics/">Aerodynamics</category>                        <dc:creator>User 7792</dc:creator>
                        <guid isPermaLink="true">https://bobtait.com.au/community/aerodynamics/weight-/?-balance-envelope---takeoff-vs-cruise-7445</guid>
                    </item>
				                    <item>
                        <title>Normal Axis Terminology</title>
                        <link>https://bobtait.com.au/community/aerodynamics/normal-axis-terminology-7441/</link>
                        <pubDate>Fri, 30 Aug 2024 12:20:30 +0000</pubDate>
                        <description><![CDATA[Hi, I&#039;m not a pilot and have recently started working my way through Bobs Recreational Aircraft BAK book. Pg54 Aircraft Motion refers to the Yaw axis being called the Normal Axis. It goes on...]]></description>
                        <content:encoded><![CDATA[Hi, I'm not a pilot and have recently started working my way through Bobs Recreational Aircraft BAK book. Pg54 Aircraft Motion refers to the Yaw axis being called the Normal Axis. It goes on to say that Vertical axis is an old term.

I have searched the site for 'normal axis' and can't find any discussion about it. I was hoping somebody could inform me how the normal axis terminology came about and why it has superseded vertical axis.

TIA, Cheers, Alan]]></content:encoded>
						                            <category domain="https://bobtait.com.au/community/aerodynamics/">Aerodynamics</category>                        <dc:creator>User 7757</dc:creator>
                        <guid isPermaLink="true">https://bobtait.com.au/community/aerodynamics/normal-axis-terminology-7441/</guid>
                    </item>
				                    <item>
                        <title>Aerodynamics KDR Questions</title>
                        <link>https://bobtait.com.au/community/aerodynamics/aerodynamics-kdr-questions-7402/</link>
                        <pubDate>Sun, 23 Jun 2024 17:22:23 +0000</pubDate>
                        <description><![CDATA[hello,

Would anyone have the questions to the following KDR errors -

BAKC 4.4.4]]></description>
                        <content:encoded><![CDATA[hello,

Would anyone have the questions to the following KDR errors -

BAKC 4.4.4]]></content:encoded>
						                            <category domain="https://bobtait.com.au/community/aerodynamics/">Aerodynamics</category>                        <dc:creator>HAMZAH IMROZ</dc:creator>
                        <guid isPermaLink="true">https://bobtait.com.au/community/aerodynamics/aerodynamics-kdr-questions-7402/</guid>
                    </item>
				                    <item>
                        <title>Rate turns</title>
                        <link>https://bobtait.com.au/community/aerodynamics/rate-turns-7324/</link>
                        <pubDate>Sun, 07 Jan 2024 10:20:52 +0000</pubDate>
                        <description><![CDATA[Hi all,
I&#039;m sitting my CADA exam tomorrow and am doing some PPL (Pilot Prac Exam) prep and was thrown by what they define as the 4 rated turns. They say;
Rate 1 - 2min @ 3deg/sec
Rate 2 -...]]></description>
                        <content:encoded><![CDATA[Hi all,
I'm sitting my CADA exam tomorrow and am doing some PPL (Pilot Prac Exam) prep and was thrown by what they define as the 4 rated turns. They say;
Rate 1 - 2min @ 3deg/sec
Rate 2 - 1min @ 6deg/sec
Rate 3 - 40sec @ 9deg/sec
Rate 4 - 30sec @ 12deg/sec

I was under the impression (as the BT text suggests) it was more like (2min, 1.5min, 1min, 30sec - and the obvious deg/sec).

Who is right here?

Simon]]></content:encoded>
						                            <category domain="https://bobtait.com.au/community/aerodynamics/">Aerodynamics</category>                        <dc:creator>User 6435</dc:creator>
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