How does the analysis compare to results for the high altitude flights at Black
Rock? Is the FAA happy with the analysis or how good the actual result fit the
analysis?
I don’t want to get too far OT and I guess this is my fault for even mentioning
splash analysis and high alts when I think we should focus on the <20K’ for
now. Because the Punisher race started all this.
From: Cliff Sojourner
Sent: Tuesday, June 16, 2015 10:30 AM
To: roc-chat@xxxxxxxxxxxxx
You can do splash for models, for example spot landing contests.
Does anyone know, does openrocket do splash analysis?
On June 16, 2015 9:45:20 AM PDT, R Dierking <applerocketry@xxxxxxxxxxx> wrote:
So motor variability includes thrust vectoring?
Hum… all parameters varied?
OK, I’ve never done that because I haven’t even come close to launching a high
alt rocket. So, please forget my reference to the splash analysis. Perhaps
for now just keeping the topic to the <20K’ rockets?
James, next time you do the analysis for one of your high alts, please let me
see the results and the track the rocket actually took. Maybe someday, way in
the future, I’ll need to do this.
From: James Dougherty
Sent: Tuesday, June 16, 2015 9:20 AM
To: roc-chat@xxxxxxxxxxxxx
What Cliff said :-)
Sent from my iPhone
On Jun 16, 2015, at 6:00 AM, R Dierking <applerocketry@xxxxxxxxxxx> wrote:
So the analysis does take into account launch angles. But, what’s the maximum
angle? Wow, than a high launch angle and altitude could take your rocket out
of even Black Rock and it would be acceptable? I've heard that in the future
FAA is interested in roll control. I wonder why and if launch angle (intended
and true) would be important.
From: Cliff Sojourner
Sent: Monday, June 15, 2015 11:51 PM
To: roc-chat@xxxxxxxxxxxxx
On 2015-06-15 11:46, R Dierking wrote:
This is an interesting problem, and a solution would help many people. Really,
what’s the use developing a complex ‘splash’ analysis for a high alt flight if
you don’t even know what direction the rocket will be going 20’ off the ground!
And, if you are off 5 degrees at that point, it makes a lot of difference
where your rocket is going to be at +10K’.
hi Richard, not picking on you tonight, really :) Splash analysis is a "monte
carlo" simulation, many many flights with all parameters varied, such as launch
angle, wind speed and direction, motor variability, etc. at the end you can
say with great statistical confidence that the rocket really will fly and land
somewhere on the splash chart.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
