BMS Other Fighters Mafia (BMSOFM) Journal
-
@tgw
Dude … What have you done!!!It looks like there is a “BUG” on that pic
Cheers
p.s. what we were talking 'bout … that former AIC analyst
Here you deserve it !! -
@white_fang said in Project Bug and the Other Fighters Mafia:
@tgw
Dude … What have you done!!!It looks like there is a “BUG” on that pic
Cheers
p.s. what we were talking 'bout … that former AIC analyst
Here you deserve it !!You betcha
-
“Confirmed”, ‘cha-ching’, good find there Fang (you da man!)! LOL
-
Preparing FM data for ‘application’ (Step-3) for a FoM (‘friend of the Mafia’, his equipment is already present in BMS, so this OFM process is staying ‘in-house’, which everyone will be able to enjoy). But good things are coming for ‘the other aircraft’ FM’s for BMS!! Stay tuned . . .
-
this project is amazing
-
@tgw said in Project Bug and the Other Fighters Mafia:
Yessir, using CFD (Computational Fluid Dynamics) will allow us to produce pretty accurate Flight Models for ‘the other’ BMS aircraft. Doing this will increase the fidelity factors (immersion and performance) of these aircraft in the simulator.
http://wikipedia.org/wiki/Computational_fluid_dynamics
http://wikipedia.org/wiki/Numerical_methods_in_fluid_mechanics
http://wikipedia.org/wiki/Blade_element_theory
Check out (via your favorite search engine) the likes of the following CFD packages, to get an idea of what we have been doing over the last 6 months or so, to accomplish this task . . . Enjoy!
https://www.altair.com/altair-cfd/
Ansys Fluent
Simcenter STAR-CCM+
Stallion 3D
OpenFOAM
Simcenter FloEFDWell… nice, thanks a lot.
And, already said or not this, I (too) just can’t await to get it.
Even better, instead: please count me, if you kindly wish, among the testers. I would like to be of any help for you.With best compliments and regards.
-
This post is deleted! -
Wheeee , the days of painting the air (in) tunnels are over , welcome to 21st century!!!
Good work indeed!!
-
@white_fang said in Project Bug and the Other Fighters Mafia:
Wheeee , the days of painting the air (in) tunnels are over , welcome to 21st century!!!
Good work indeed!!
You bet, White_Fang! We are very close to flight testing this.
-
Good Day, All,
Here’s our Mafia Update for the day, and I’m very happy to be making this one. It’s been posted here and elsewhere that the Mafia has been in a phase of “building the infrastructure” to be able to enhance the BMS Hornet, and from there to the BMS" Other Jets". During this time we have “felt the pain” the BMS Dev’s go through developing things. It’s really hard to put a timeline on such things! Anyway, to do this we have been testing using various jets and software tools.
I am very happy to be able to finally make the following announcements…- Our testing/developmental “tool box” is now in order. Our “infrastructure” is built
- While we remain loyal to the FOM’s( Friends of Mafia) and the projects we’ve been asked to do, we are now doing direct development and testing for the BMS Hornet
And now the fun starts…
-
Great news for BMS as a whole! Excited to see your work on the F/A-18!
-
<p>Ok, prelim numbers are looking good for the Hornet’s airfoils. Just need to fine tune known conditions and prepare for the unknowns. Also, we are moving forward with the BE sim (and MatLab) that will be the prelim testing environment for our new Hornet & airfoils, before converting the coefficient data over to the F4BMS format . . . stay tuned!<br /><br /><img class=“ql-image” src=“https://i.imgur.com/gugvNck.jpg” /><br /></p>
-
<blockquote>Ok, prelim numbers are looking good for the Hornet’s airfoils. Just need to fine tune known conditions and prepare for the unknowns. Also, we are moving forward with the BE sim that will be the prelim testing environment for our new Hornet & airfoils, before converting the coefficient data over to the F4-BMS format . . . stay tuned! <br /><br /><img class=“ql-image” src=“https://i.imgur.com/gugvNck.jpg” /></blockquote><p><br /><span style=“background-color:#dcdcdc”>Just a question: how will you go from your computed airfoil Coef to the aircraft one ?</span><br />Even for the clean airfoil I’m a bit surprised by the Cl/Cd reaching 30… (not to say how it is far away from the RL Hornet max Cl/Cd)</p>
-
<p>The ratio you see there is only relative to the airfoil itself, not the complete aircraft. With ‘clean’ wings, I regularly see ratios of 20->60:1 (with Reynolds ranging from 3.1M to 17M+ on laminar foils with NCrit values ranging from: 5 -> 10). So what you are seeing there is not unreasonable, to say the least . . . Thank you for helping me clarify that.<br /><br />Airfoil data wll be plugged into a “Blade Element” simulator (& MatLab), which will include airframe & foil lift - drag coefficients. Then the whole aircraft compared against ‘known’ documented conditions (NASA & NATOPS docs) to validate the performance data we will be producing . . . .<br /><br /><br /><br /><em>**Sidenote: I am seeing a CFD cl/cd ratio of 54:1 (@ 4 degs AoA, 17.5M Re) on the Hornet’s main wing. From the time I have spent in the DCS:Hornet (700+ hours) this same performance (minimal parasitic and induced aircraft drag) was also seen at +4.0 degs AoA too . . .</em><br /><br /><br /></p>
-
<p>A reality coming soon . . .<br /><br /><img class=“ql-image” src=“https://i.imgur.com/4t1OmzW.jpg” /><br /><br /><img class=“ql-image” src=“https://i.imgur.com/hXMRckI.gif” /><br /></p>
-
-
<p>So . . . another aspect we will be able to accomplish will be an aircraft’s perfomance capability against another. Welcome to the world of the E-M diagram, a theory brought forward by both Col. John Boyd (fighter jock) and Thomas Christie (mathematician). These charts will also be a validation test against the models we produce and will be compared against known EM plots from the NAVAIR or USAF sources.<br /><br />Shown here are a T-34C Mentor vs. a Bede BD-5J, quite the fight would ensue! One can quickly tell the BD-5J has the instaneous [loss of altitude and/or airspeed, -Ps values] turning advantage at ~112kts @ 35 degs/sec. It would be a really interesting ‘rate-fight’ at around 114 knots (@ 19.2 degs/sec) where both aircraft exhibit a, Ps=0 value (sustained turn-rate with no loss in airspeed or altitude)<br /><br /><img class=“ql-image” src=“https://i.imgur.com/kig04iO.png” /><br /><br />Bede BD-5J<br /><img class=“ql-image” src=“https://i.imgur.com/br2ztLN.jpg” /><br /><br />T-34C Mentor<br /><img class=“ql-image” src=“https://i.imgur.com/h6S5POG.jpg” /><br /></p>
-
<p>Good Day, All. Here’s our update for today…<br /> I have been notified that the Mafia hotspot fixes created for 4.35 have been put the base 4.36 install. We are honored the Dev’s include our stuff! Meanwhile, we continue to work on the F-18C flight model. At his point we are working under the assumption that it will not be ready when 4.36 comes out. So, we have already created an “Install Pack” that will have everything you need, including a User Guide, and don’t be worried that it’s some nightmarishly complex procedure. <img src=“/plugins/nodebb-plugin-emoji/emoji/android/1f628.png?v=1g16vn91q2r” alt=“” class=“not-responsive emoji emoji-android emoji–fearful” /> <br />This will also help the other Hornet variants like the EF-18M and the CF-188. I also have a little side project going where I’m experimenting with how the new Hornet stuff relates, or basically how <em>can </em>it relate, to the F-18 E/F and the Growler<br /> <br /><br /><br /><br /><br /></p>
-
<p>@drtbkj excellent news, magnificent I would say, that the development team will take part of the FM work and base it on 4.36, wonderful. We are making progress.<br /><br />regards</p>
-
<p>Bug FM Status: I have been working closely with a PhD in Aeronautics. I am in the process of creating all the coefficients and guidance <control> laws for an F/A-18. It will have to be tested in another 6-DOF sim (JSBSim) beforehand though, to make sure all the numbers pan out properly. Then copy all the coefficients over to BMS acdata format. Then a ‘good run through’ with all of our <in house> beta testers, then a ‘release to the wild’ with one of the most accurate representations of our wonderful Bug (within BMS limits), for all to enjoy! Sadly, these FM changes will not make the initial 4.36 release deadline, but will be worth the wait . . .<br /><br /><br /></p>
-
<p>@TGW Do’nt you think it is exactly what has been done before ?</p>