General Enquiries - Bob Tait Aviation Theory Forum

ERSA Conversion Tables?

jacobcarnall — Thu, 19 Mar 2026 10:33:44 +0000

Hello! I haven’t updated my ERSA for a while (don’t worry, I haven’t been flying!) - but am getting back into it.

My ERSA from 2019 has conversion tables in it, but I can’t find them anymore in the current ERSA.

Does anyone know where they have gone?

Determining wind in flight

Ravi — Sun, 16 Nov 2025 23:19:37 +0000

Hi everyone, Im finding the whiz wheels take too long to determine wind in flight We have HDG/TAS, and TMG/GS as our info. Therefore can we not use the triangle of vectors. We put the magnitude and vector TMG/GS which is our path over the ground with compass and ruler....1 Then we put our HDG/TAS as our other vector with compass and ruler....2 Then the final vector going from 2 to 1 is the wind vector and we can measure the magnitude and from where the wind comes from I used this for the examples in the Bob Tait book and it seemed to work Appreciate your thoughts Kind regards Ravi

Answers to the Navigation workbook

Ravi — Sun, 16 Nov 2025 23:10:06 +0000

Hi Bob and team, is there a page with the answers to the navigation workbook that I just purchased No problems if not Kind regards Ravi

how to pass the IREX

isaac — Thu, 06 Nov 2025 09:39:45 +0000

Just passed the IREX and thought that I would share some of the techniques that I used that I would have wanted to have access to before my exam. The exam overall is very similar to Bob's practice exams. Expect to get 2/3 questions on each of these topics LSALT, sector entry, fuel calculations, holding/alternate requirements, and bearing/intercept questions. The exam is also full of questions where the answers are in the AIP, part 91, 61, ERSA, or DAPs. 1. Read through the textbook once. Take notes if you want. Just get familiar with terminology... 2. Take a practice exam at the start of your study so you can see how the exam is formatted and what is actually relevant to your study. 3. Go back and work on the questions you got wrong. Don't try to find videos online- there aren't any at the moment. Go back to the textbook and take your time going through the topic you struggled with, and do all of the practice questions so that you can fully understand it and turn any weaknesses into strengths. (Also check the common errors section on the CASA website) 4. Do as many practice exams as you can and make sure you get to know the DAPs, ERSA, AIP, and part 91, 61 like the back of your hand- probably at least half ( I say closer to 60/70%) of the answers to questions can be found in these documents. Also, put tags in the AIP and ERSA, 15 and 5, respectively. 5. Make a "cheat sheet" of formulas, weather conditions, icing temps, or anything you struggle with, and practice writing it down so that at the start of the test, you can write it all down and not be stressed trying to remember that one thing during the exam. 6. Learn from your mistakes, find the nuance in the question, and use that to your advantage. An example would be the unreliable altimeter question from Bob during an ILS where, instead of going around, you can just switch to the LOC approach. 7. Read the question and the answers slowly and properly. Don't make silly mistakes. This probably isnt great advice but you really dont need to know that much about IFR flying (or even the VH-OZY fact sheet) for the IREX, You just need to get really good at knowing where to find the answer in the permitted materials, and then you only really need to know the stuff about weather etc that you can't bring into the exam. Good luck, Thanks Bob couldnt have done it without you.

remaining inside and outside of CTA or OCTA for ROC and ROD

Ravi — Sun, 02 Nov 2025 12:56:40 +0000

Thanks again for all the help everyone out there Am I correct in this assumption? if we are planning ROC/ROD to be in CTA for calculating ROC and ROD, then we need to be 500FT above the step if we are planning ROC/ROC to be outside CTA we can border the CTA and not be 500FT below the LL? Is that the correct assumption fror the exam? Seems to be what we do flying... unless otherwise told to by ATC Kind regards Ravi Mahajani

Bravo loading system question 47 on the RPL untimed practice exam #3

jack — Sun, 26 Oct 2025 16:52:09 +0000

Howdy team, I've just attempted the question: A Bravo type aircraft has an all up weight of 2200lbs and a Moment Index of 205. There are eight 10lb boxes of documents loaded securely on the seats in Row 2. If there is no room in Row 1, what is the minimum number of boxes which would need to be removed before the aircraft could depart? Now I figured it was 5 boxes, however the answer was suggested to be 3 boxes. The solution given was, to plot on the loading chart where it currently is at 200 lbs and 205 moment index, and we can see, it's out of the box. Then it says, to plot what it would be with NO boxes, well within the loading box, then draw a line between the two points, and we can see that the point that it intercepts the boundary of the box is roughly 2170lbs, and thus, remove 3x10lbs boxes - there you have it. However, I did the numbers for 3 boxes. Given we are removing 30lbs from row 2, which has an ARM of 126, that would give us a reduction in moment of (-30*126)/1000 =-3.78 If we then deduct 3.78 from our 205 all in moment figure, we would get to a TOW of 2170 and Moment of 201.22 - which is beyond the boundary of 199/200 ish for a TOW of 2170. if you have a crack at 5 boxes, you'll get an TOW of 2150 and moment of 199, which when plotted is bang on right within the limits. Im pretty sure even 4 boxes would work too, but 3, based on my numbers wouldn't work. IS there something wrong with the way that I've worked this out? Because, man, I'd really love to be getting these 3 markers RIGHT Cheers all

Missing information

jack — Thu, 23 Oct 2025 18:48:00 +0000

Howdy guys, I’m working my way through the RPL Volume One in prep for an exam, and I’ve noticed a few times that the questions at the end of the chapters ask things that aren’t actually covered in the chapter itself. For example - I just finished the whole section on clouds (types, characteristics, etc.), and the first question in the review quiz is about cumuliform clouds and how they form. The problem is, that specific cloud isn’t mentioned anywhere in the text. I’m genuinely trying to understand what’s expected here. Should I be studying extra material beyond the book, or is the idea that we’re supposed to infer those concepts somehow? I really want to pass the exam, but it’s a bit confusing when the test questions seem to go beyond what’s been taught. Would appreciate any clarification or study guidance. Cheers, Jack

NDB Rated Coverage UTC or Local

William — Wed, 17 Sep 2025 13:05:50 +0000

Seems like this might be a silly question, but in terms of how we determine whether to use the night time or day time range of an NDB. Is it based on UTC or local. Furthermore do we need to calculate BOD and EOD to find what defies the period of daylight. Lastly, is it our arrival or departure time that dictates if we use night ranges. Thanks

Do Assignment Writers Really Improve Student Learning?

James Smith — Fri, 12 Sep 2025 15:50:16 +0000

When it comes to academic success, many students often struggle with managing multiple assignments, tight deadlines, and complex topics. This has led to the growing popularity of hiring an assignment writer for professional help. But the big question remains—does working with an assignment writerassignment writer actually improve a student’s learning, or does it just serve as a shortcut to better grades? On one hand, a skilled assignment writer can provide well-structured papers, proper referencing, and clear explanations that serve as a great study resource. Students can learn how to approach topics, conduct research, and format their work according to academic standards. In this way, assignment writers can act as academic guides. On the other hand, critics argue that relying too much on an assignment writer might reduce a student’s personal effort, leading to dependency instead of skill development. So, what do you think? Have you ever used an assignment writer before? Did it help you understand your subject better? Or do you feel it only helped you meet deadlines without adding much to your learning? Looking forward to hearing your thoughts and experiences!

separation times and distances for wake turbulence

Ravi — Wed, 10 Sep 2025 22:50:24 +0000

Hi all, is there a simple table for distances and timings for wake turbulence settings Im having difficulty tracking these values down in the ENR then the MOS 172 Its just really hard! Kind regards Ravi