Orbital Mechanics Class Traditional

tahanson43206 · 2023-04-01 09:31:20

With the approval of SpaceNut, this topic is created to serve as a foundation for a class on Basic Orbital Mechanics in development for a high school audience by GW Johnson. This topic is set up for the traditional materials created by Dr. Johnson, using Microsoft Word, Excel and Paint.

As of 2023/04/01 I am working posts set up for each lesson.
As of 2023/04/20 Lessons through 4B are available for evaluation or use.

Please note that the spreadsheet MUST be downloaded so it can run on the local computer.

All materials are provided for free, and the intention is to enlist the assistance of anyone interested in helping with publicity to do so. The materials will be stored in our Dropbox account, and they will be served to students using links in this forum.

Update 2023/04/15:

For our guests who will be evaluating this course material for yourself or for others:

We would like to provide whatever assistance or guidance you need. We will be adding tips/suggestions/hints as they are recommended to us. Please use the email address shown in the Recruiting topic to communicate with Dr. Johnson or other members of the forum.

In addition, Dr. Johnson has provided direct email and telephone number in the PowerPoint presentations in each lesson.

(th)

tahanson43206 · 2023-04-01 10:38:57

Disclaimer: a person who completed this course will NOT be qualified to pilot a space craft between Earth and Mars or anywhere else. It is constrained to the two body problem and two dimensions. A person desiring to qualify for a position as a space craft navigator or a pilot will require additional education, including the ability to operate computing equipment capable of solving the 3 body problem in real time.

A statement of positive outcomes from taking this course is in development. The course is designed to provide a foundation for further education in the space field.

A preliminary assessment of positive outcomes includes the ability to teach the contents of this course to others.

(th)

tahanson43206 · 2023-04-07 06:13:44

Course Overview

Special message for our guest from Alaska ... the structure here is being built up as I have time.

The entire Lesson one file set is available. Please review the Lesson Zero files and then go to the Lesson 1 location.

Update 2023/05/16 .... Dr. Johnson provided versions of the Lesson Zero files with the numeric names.

Lesson 0 PowerPoint: https://www.dropbox.com/s/2lfdohtvybvi7 … x.ppt?dl=0

Lesson 0 pdf: https://www.dropbox.com/s/elme1hopgs507 … 0.pdf?dl=0

The original Lesson Zero files remain in place for those who might be interested. The two sets of files are identical.

Lesson Zero PowerPoint
https://www.dropbox.com/s/c04r3eueg2e4n … x.ppt?dl=0

Lesson Zero pdf
https://www.dropbox.com/s/y74lbyur5kzjp … x.pdf?dl=0

(th)

tahanson43206 · 2023-04-07 06:15:00

Lesson 1:

***
Basics of Elliptic Orbits PowerPoint in pdf format:
https://www.dropbox.com/s/nv9x61mkd9tbt … T.pdf?dl=0

Lesson 1 text with four figures:
https://www.dropbox.com/s/qv1yxww045yd4 … 1.pdf?dl=0

Feedback for Dr. Johnson and NewMars members is welcome. Please see Recruiting topic for the email address.

(th)

tahanson43206 · 2023-04-07 06:15:11

Lesson 2:

***
Lesson 2 PowerPoint in PDF format:
https://www.dropbox.com/s/wne62kkbt4z95 … F.pdf?dl=0

Lesson 2 text with figures:
https://www.dropbox.com/s/fa9fmf3vyiwx3 … 2.pdf?dl=0

Feedback for Dr. Johnson and NewMars members is welcome. Please see Recruiting topic for the email address.

(th)

tahanson43206 · 2023-04-07 06:15:29

Lesson 3 with Spreadsheet

***
Lesson 3 PowerPoint in PDF format:
https://www.dropbox.com/s/kq69yi3bz5xs3 … F.pdf?dl=0

Lesson 3 text with figures:
https://www.dropbox.com/s/hlkuvfbcts7w7 … 3.pdf?dl=0

The spreadsheet that contains formulae and data for this course is available here. Please download the spreadsheet.
The spreadsheet is written for Microsoft Windows, and it can be converted to run on Macintosh and Linux systems.

Spreadsheet:
https://www.dropbox.com/s/gfyl7g4lpzbfg … .xlsx?dl=0

Feedback for Dr. Johnson and NewMars members is welcome. Please see Recruiting topic for the email address.

Update 2023/08/25 .... The spreadsheet above will work for this lesson.

A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-07 06:15:47

Lesson 3B:

***
Next is Lesson 3B PowerPoint in PDF format:
https://www.dropbox.com/s/0se4b2u838sax … F.pdf?dl=0

Lesson 3B text with figures:
https://www.dropbox.com/s/zy98m7zjd8crj … s.pdf?dl=0

Feedback for Dr. Johnson and NewMars members is welcome. Please see Recruiting topic for the email address.

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-07 06:15:57

Lesson 4:

***
Next is Lesson 4 PowerPoint in PDF format:
https://www.dropbox.com/s/14p73s8j9162p … F.pdf?dl=0

Lesson 4 text with figures:
https://www.dropbox.com/s/jltn3hajawox7 … 4.pdf?dl=0

Feedback for Dr. Johnson and NewMars members is welcome. Please see Recruiting topic for the email address.

Link to lesson text corrected 2023/04/20 (th)

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-07 06:16:07

Lesson 4B:

***
Next is Lesson 4B PowerPoint in PDF format:
https://www.dropbox.com/s/ex9rqns0734tr … F.pdf?dl=0

***
Lesson 4B text with figures in PDF format:
https://www.dropbox.com/s/csrpgj7vqc6gw … B.pdf?dl=0

Feedback for Dr. Johnson and NewMars members is welcome. Please see Recruiting topic for the email address.

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-15 17:23:13

Lesson 5

Lesson 5 PowerPoint:
https://www.dropbox.com/s/xz3vfn915uf8n … t.pdf?dl=0

Lesson 5 Text:
https://www.dropbox.com/s/u9zbwy4eoem5o … 5.pdf?dl=0

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-15 17:23:29

Lesson 5B

Lesson 5B PowerPoint;

https://www.dropbox.com/s/pzcanjej4oikb … x.ppt?dl=0

Lesson 5B pdf:

https://www.dropbox.com/s/c30hzbt6ajo4w … B.pdf?dl=0

Posted 2023/05/16 (

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-15 17:23:46

Lesson 5.5

Updated 2023/08/25...

Lesson 5.5 fast transfers.pdf

https://www.dropbox.com/scl/fi/10yha5lf … bdt2b&dl=0

Lesson 5.5 PowerPoint

https://www.dropbox.com/scl/fi/llmya1av … mtzue&dl=0

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-15 17:23:55

Lesson 5.5B

Updated 2023/08/25 ...

Lesson 5.5B pdf

https://www.dropbox.com/scl/fi/42f6xbpz … 1zi88&dl=0

Less 5.5B PowerPoint

https://www.dropbox.com/scl/fi/bpijvlpw … vx847&dl=0

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-15 17:24:04

Lesson 6

Lesson 6 PowerPoint:
https://www.dropbox.com/s/1davkqirevrn8 … t.pdf?dl=0

Lesson 6 text:
https://www.dropbox.com/s/om4w45f79grdu … 6.pdf?dl=0

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-15 17:24:13

Lesson 6B

Lesson 6B PowerPoint:
https://www.dropbox.com/s/ujn4xo4jxyo03 … x.ppt?dl=0

Lesson 6B pdf:
https://www.dropbox.com/s/dyi97gnr8r69x … m.pdf?dl=0

Updated 2023/05/17

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-15 17:24:22

Lesson 7 - updated 2023/08/03

Attached files are what I have, and it seems ready to go. This is the one that teaches hypersonic entry dynamics and stagnation heating, by way of a spreadsheet with the old 1953-vintage analysis of H. Julian Allen. Somehow, the Excel spreadsheet for this must be made available as part of the class resources, same as with the ellipses spreadsheet. The pdf document for the lesson is just the user manual written for the spreadsheet, and the powerpoint presents what is in that manual. The problem-working session documents using multiple spreadsheet runs to find the sensitivities of entry results to the available entry variables. It's likely 2 or 3 hour-long sessions. Same stuff is in the pdf document and powerpoint.
<snip>
GW

entry spreadsheet.xls
https://www.dropbox.com/scl/fi/9xjaw3m6 … d03mf&dl=0

lesson 7 hypersonics Impress Slide Show
https://www.dropbox.com/scl/fi/av2ncvzg … jzbz2&dl=0

To use the spreadsheet, download the XLS from Dropbox and run it on your computer.

User Manual for Back Of Envelope Entry Trajectory Spreadsheet
https://www.dropbox.com/scl/fi/rdqawq8z … y27y8&dl=0

I am not sure if this manual goes with the spreadsheet above.

I'll ask Dr. Johnson to review the course set up.

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-15 17:24:32

Lesson 7B

Updated 2023/08/03 (th)

lesson 7B entry trades Impress Slide Show
https://www.dropbox.com/scl/fi/ee2abaf5 … ddvg8&dl=0

Lesson 7B Entry Trades Problem Session
https://www.dropbox.com/scl/fi/2gcdqnyq … 8rl5e&dl=0

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-15 17:24:43

Lesson 8

Email for Lessons 8 and 8B

These are the spreadsheet-assisted means to quickly and reliably size TSTO vehicles to Earth orbit. Again, the Excel spreadsheet itself needs to be part of the class resources that the student can obtain. This one teaches the student what to do with good data for engine performance. Lesson 9 describes where that good engine performance data comes from. The example vehicle is what we have been talking about in the Ariane-6 thread: denser but lower-performing propellants in the first stage, and LOX-LH2 in the second stage that shoulders most of the dV. I got 6+% payload fractions with it, but the final optimal selection of staging velocity is beyond these by-hand methods to determine.
GW

Lesson 8 Impress Slide Show
https://www.dropbox.com/scl/fi/e1t26quy … u7e1p&dl=0

Lesson 8 Rocket Vehicle Sizing and Performance
https://www.dropbox.com/scl/fi/ydd7cnnj … 5su51&dl=0

TSTO Two Stage to Orbit vehicle sizing spreadsheet
https://www.dropbox.com/scl/fi/5z0805oj … uclnd&dl=0

I'll ask Dr. Johnson to review the course setup.

(th)

tahanson43206 · 2023-04-15 17:24:53

Lesson 8B

Updated 2023/08/03

Lesson 8B Impress Slide Show
https://www.dropbox.com/scl/fi/95d1pix9 … 94ezt&dl=0

Lesson 8B pdf document
https://www.dropbox.com/scl/fi/etoyf13r … tocsl&dl=0

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-15 17:25:02

Lesson 9

Updated 2023/08/03

Lesson 9 Impress Slide Show
https://www.dropbox.com/scl/fi/zrc0pyua … 0mix9&dl=0

Lesson 9 pdf
https://www.dropbox.com/scl/fi/h8latffl … diay3&dl=0

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-04-15 17:25:11

Lesson 9B

Updated 2023/08/03 (th)

Lesson 9B Impress Slide Show
https://www.dropbox.com/scl/fi/ofjkbb2q … h7fh0&dl=0

Problem Session 9B Rocket Engine Performance pdf
https://www.dropbox.com/scl/fi/2cz0eb0e … kivz3&dl=0

rocket nozzle spreadsheet
https://www.dropbox.com/scl/fi/salxwvp8 … 894a8&dl=0

(th)

tahanson43206 · 2023-07-26 20:47:28

For our student from Texas .... this is the topic with Dr. Johnson's traditional course.
Please provide feedback (questions/comments) to help us improve the presentation!
(th)

tahanson43206 · 2023-08-02 06:15:21

Dr. Johnson has completed:

Lessons 7 and 7B

Lessons 8 and 8B

Lessons 9 and 9B

My plan is to post these during the current day, 2023/08/02

Only 5 and 5B remain, but they may have to wait for a while. Other projects are in the development phase.

Related: I am slowly reproducing the entire class in the Knowledge forum, to provide continuity in case of future outage at NewMars.

Update 2023/08/25 .... all lessons are now on station.\

2023/08/25: A new spreadsheet is available with more features to cover all the lessons in this course.

orbit basics spreadsheet

https://www.dropbox.com/scl/fi/cxtpsx2n … nmkmv&dl=0

Reminder .... you need to download the spreadsheet and run it on your computer.

(th)

tahanson43206 · 2023-08-03 18:40:16

The 15 links for Lessons 7-8-9 are ready to be installed in their respective posts.

My intention is to report progress here.

All links are installed, for lessons 7-9, subject to correction following review by GW Johnson.

(th)

GW Johnson · 2023-08-04 08:28:14

I have not yet downloaded the spreadsheet files to check for functionality in the downloads. The only problem I saw was for lesson 8B: the slideshow file is linked twice, without a link to the corresponding pdf document.

The intent here was to have a spreadsheet file for showing this to a multiple-person audience, but with the same info in a pdf file that each learner has for his/her own "textbook". If you are learning by yourself alone, just use the pdf document. It has explanatory words that no one can put on a slide.

The hardest part about this is learning somebody else's spreadsheet. The best way during a session is to put the spreadsheet up on the wall "live", and do it "live". Then it makes sense.

GW

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#1 2023-04-01 09:31:20

Orbital Mechanics Class Traditional

#2 2023-04-01 10:38:57

Re: Orbital Mechanics Class Traditional

#3 2023-04-07 06:13:44

Re: Orbital Mechanics Class Traditional

#4 2023-04-07 06:15:00

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#10 2023-04-15 17:23:13

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#11 2023-04-15 17:23:29

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#12 2023-04-15 17:23:46

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#13 2023-04-15 17:23:55

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#14 2023-04-15 17:24:04

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#16 2023-04-15 17:24:22

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#17 2023-04-15 17:24:32

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#18 2023-04-15 17:24:43

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#19 2023-04-15 17:24:53

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#20 2023-04-15 17:25:02

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#21 2023-04-15 17:25:11

Re: Orbital Mechanics Class Traditional

#22 2023-07-26 20:47:28

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#23 2023-08-02 06:15:21

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#24 2023-08-03 18:40:16

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#25 2023-08-04 08:28:14

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