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Search: Posts Made By: janrein
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Forum: Rumours & News
14th Nov 2014, 17:25
Replies: 281
Views: 222,273
Posted By janrein

About hypersonic aerothermodynamics complexity

From http://www.nasa.gov/centers/dryden/pdf/88290main_H-1894.pdf



See a.o. Page 5 and Figure 5.
Forum: Rumours & News
7th Nov 2014, 09:11
Replies: 281
Views: 222,273
Posted By janrein

@WorkingSection Thanks. Previous commenters...

@WorkingSection
Thanks.
Previous commenters were right, I used patternīs reported graphs but had not read them very accurately, especially density at 70kft is lower than what I mentioned.
Forum: Rumours & News
6th Nov 2014, 15:35
Replies: 281
Views: 222,273
Posted By janrein

@RichardC10 Maybe because of the...

@RichardC10


Maybe because of the following procedure drivers/considerations.

Imagine locks are discovered blocked or the locks operation system is discovered unserviceble. If this is...
Forum: Rumours & News
5th Nov 2014, 22:38
Replies: 281
Views: 222,273
Posted By janrein

"Feathering"

@Rodney

Indeed! And what appears initially as irony may in some cases even cause confusion. Human factors, language, ... all that.

(not in this case I believe)

jr
Forum: Rumours & News
5th Nov 2014, 22:23
Replies: 281
Views: 222,273
Posted By janrein

Aerodynamic forces and feather booms

@patternfull
That link to atmosphere up to Karman line comes in handy.

Inputs from various sources combined with atmosphere structure as per link:
M1 at 45 kft ==> 295 m/s at 0.25 kg/m3...
Forum: Rumours & News
3rd Nov 2014, 12:19
Replies: 281
Views: 222,273
Posted By janrein

Mach versus time

Timings and statements from the various videos:

Powered flight 1, rubber fuel, 17 seconds
Powered flight 3, rubber fuel, 20 seconds, Mach 1.4
Powered flight 4, plastic fuel, 9 seconds to...
Forum: Rumours & News
3rd Nov 2014, 11:09
Replies: 281
Views: 222,273
Posted By janrein

Dynamic pressure, engine burn, feathering

Any drastic configuration change like feathering is not to be expected until well after q_max and most likely after motor burn-out (except perhaps for considerations as mentioned in Case Oneīs post,...
Forum: Rumours & News
2nd Nov 2014, 10:30
Replies: 281
Views: 222,273
Posted By janrein

Oxiser tank to rocket motor connection failure?

Trying to get something from the pictures.

From the NTSB B-Roll video 0:18 top of tank, 0:34 bottom of tank/interface (though hard to see) and 2:47 rocket motor(?) which appears intact at least...
Showing results 1 to 8 of 8


 
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