Hi, have you had any progress with this yet? I have a rocket that I am about to launch with a MPL and have a BMP ordered. Its in a 10DOF IMU
I am willing to share my results?
I’m sorry, not really. The department has ordered the pressure sensor and the microcontroller and we will design the board and build a prototype by late-September. The idea is to end up with something similar to the Rocketduino which mounts the BMP085 too (http://hackaday.com/2013/07/07/rocketduino-for-high-g-high-altitude-logging/), but for the nonce, estimating altitude will satisfy our ambitions.
This is an early stage, so I am becoming familiar with the PIC18 family of microcontrollers (though we could have used any Arduino board).
The blog is up-to-date, and I intend it to be a logbook of my achievements so far. But do not expect any working prototype within the next couple of months. What you may see though, is progress towards a final working design and some CFD analyses regarding questions such as which is the optimal location for the barometric pressure sensor. Also, I’m am using ISIS Proteus to validate somehow source code and hardware before assembling an actual prototype.
Of course, relying only on barometric pressure for altitude estimation is not a wise choice, but it is cheap both economically and conceptually and it’s effective.
You may find some useful information at http://www.aircommandrockets.com/index.htm as they are veteran rocket designers.
It would be nice to follow your progress, do you maintain a blog?
Hi, These are some great and informative graphs. I was wondering if you could send me the source data for all of the lap times for each driver during the race? Or let me know where I can find it?
I was hoping to have a go at doing some of my own analysis of the race and spreadsheet with all the lap times would be really helpful. I can’t seem to find it anywhere online.
Thanks for the compliments. I have also a full scale model, but I don’t have the computational resources to simulate it.
The Seguracing you are working on seems very interesting and very promising too.
Thanks for your comment. I have tons of data I can analyse with MoTeC’s i2 software, so I will definitely try to compare laps with a more notable difference between them.
Any suggestions on what aspects I should focus on are welcome.
Simulation is of half-wing only —assuming symmetry— but results are those of a full wing. I instructed STAR–CCM+ to produce the results considering only the surface of that one half of the wing, so the values here shown —Force— are twice those reported by the software to account for the full wing. On the contrary, pressure coefficients, being dimensionless, are those directly reported by STAR–CCM+.
Help me please
How can I write a script to copy to Title block names and phones from ECXEL table?
For example “drafter name” – cells A3 (in excel)
“drafter phone” – cells A4 (in excel)
Thank you
Yury
That is something I have not looked into yet. Anyway, if the data you intend to introduce is not going to be changing quite often you can just include the names and phones within the Macro code.
Thank you for answer.
Names and phones usual is different. Excel file with this information send me supplier.
If you have any idea, how create this script, let me now, please….
Thank you.
Yury
Very, very cool. I have a 2016 GT350 (Track Pack) and had purchased the R front splitter and R rear wing. This is EXACTLY the kind of data I was looking for.
I also purchased the model used here (from Turbosquid) but couldn’t get it to work with Solidworks even after converting formats using various other programs. So thanks for the insight on how you did it. Much appreciated!
Thanks for your comment. It seems like a big impact, but absolute values are very low. With a more detailed model, values could change.
Also the values are for the two headlights on. In the image I just put both models side by side to compare the differences (maybe I should clarify that).
This was done a long time ago, and the geometry came with STAR-CCM+ tutorials… But if you want to have a look at a more modern geometry, you can try with Perrinn’s LMP1 car, which is openly available at Onshape.com
hi, my simulation for DrivAer fastback are converging well but we i draw the velocity streamline in techplot the flow is asymmetric for steady RANS, what could be the possible reason and how to solve it?
I’ll lend you myself as a consultor, price to be negociated…
Germán
My dear friend, a cup of coffee will suffice for the nonce? I am short of funds right now :)
What’s up, yup this paragraph is in fact pleasant and I have learned lot of things from it regarding blogging. thanks.
Thankfulness to my father who informed me about this website, this web site is really awesome.
Hi, have you had any progress with this yet? I have a rocket that I am about to launch with a MPL and have a BMP ordered. Its in a 10DOF IMU
I am willing to share my results?
I’m sorry, not really. The department has ordered the pressure sensor and the microcontroller and we will design the board and build a prototype by late-September. The idea is to end up with something similar to the Rocketduino which mounts the BMP085 too (http://hackaday.com/2013/07/07/rocketduino-for-high-g-high-altitude-logging/), but for the nonce, estimating altitude will satisfy our ambitions.
This is an early stage, so I am becoming familiar with the PIC18 family of microcontrollers (though we could have used any Arduino board).
The blog is up-to-date, and I intend it to be a logbook of my achievements so far. But do not expect any working prototype within the next couple of months. What you may see though, is progress towards a final working design and some CFD analyses regarding questions such as which is the optimal location for the barometric pressure sensor. Also, I’m am using ISIS Proteus to validate somehow source code and hardware before assembling an actual prototype.
Of course, relying only on barometric pressure for altitude estimation is not a wise choice, but it is cheap both economically and conceptually and it’s effective.
You may find some useful information at http://www.aircommandrockets.com/index.htm as they are veteran rocket designers.
It would be nice to follow your progress, do you maintain a blog?
Fantastic Post.many thanks for share… awaiting more.
Reblogged this on Sutoprise Avenue, A SutoCom Source.
Are you participating in the MOOC by Bert Bloken on Coursera?
Yes, I’m following the MOOC in Sports and Building Aerodynamics.
Hi, These are some great and informative graphs. I was wondering if you could send me the source data for all of the lap times for each driver during the race? Or let me know where I can find it?
I was hoping to have a go at doing some of my own analysis of the race and spreadsheet with all the lap times would be really helpful. I can’t seem to find it anywhere online.
Hi Ben,
I get all the data from Ergast in the JSON format. Then I do some post processing in Python and pandas before uploading the plot to plotly.
That’s great, thanks for that
really interesting work i like it me too i work in the same project but with full car looking forward to get in touch with you via email !!!
Thanks for the compliments. I have also a full scale model, but I don’t have the computational resources to simulate it.
The Seguracing you are working on seems very interesting and very promising too.
Very interesting post to explain the method. If you are thinking in doing comparisons, better start with laps with more time diff ;)
Thanks for your comment. I have tons of data I can analyse with MoTeC’s i2 software, so I will definitely try to compare laps with a more notable difference between them.
Any suggestions on what aspects I should focus on are welcome.
Hey I just wanted to be sure, are these values for the half model or the full model? (i.e are the actual forces on the wing twice those displayed)?
Simulation is of half-wing only —assuming symmetry— but results are those of a full wing. I instructed STAR–CCM+ to produce the results considering only the surface of that one half of the wing, so the values here shown —Force— are twice those reported by the software to account for the full wing. On the contrary, pressure coefficients, being dimensionless, are those directly reported by STAR–CCM+.
Help me please
How can I write a script to copy to Title block names and phones from ECXEL table?
For example “drafter name” – cells A3 (in excel)
“drafter phone” – cells A4 (in excel)
Thank you
Yury
Hi Yury,
That is something I have not looked into yet. Anyway, if the data you intend to introduce is not going to be changing quite often you can just include the names and phones within the Macro code.
Regards.
Thank you for answer.
Names and phones usual is different. Excel file with this information send me supplier.
If you have any idea, how create this script, let me now, please….
Thank you.
Yury
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Very, very cool. I have a 2016 GT350 (Track Pack) and had purchased the R front splitter and R rear wing. This is EXACTLY the kind of data I was looking for.
I also purchased the model used here (from Turbosquid) but couldn’t get it to work with Solidworks even after converting formats using various other programs. So thanks for the insight on how you did it. Much appreciated!
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great piece on an obvious impact … but one headlight accounting for 60% of frontal downforce is an amazing fact ,kudos !!!
Hi Michel,
Thanks for your comment. It seems like a big impact, but absolute values are very low. With a more detailed model, values could change.
Also the values are for the two headlights on. In the image I just put both models side by side to compare the differences (maybe I should clarify that).
Cheers,
“we have a uniform velocity of 35 m/s (126 km/s)”
> I think you meant km/h here. ?
Yes indeed. Updated. Thanks!
wow, is there any posible way to have a look to that material _?
Hi Julian,
This was done a long time ago, and the geometry came with STAR-CCM+ tutorials… But if you want to have a look at a more modern geometry, you can try with Perrinn’s LMP1 car, which is openly available at Onshape.com
Cheers,
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Thanks for posting. Your blog is awesome!
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This citation is in the book's 27th chapter :)
hi, my simulation for DrivAer fastback are converging well but we i draw the velocity streamline in techplot the flow is asymmetric for steady RANS, what could be the possible reason and how to solve it?