Oleg Zabluda's blog
Sunday, April 29, 2012
 
Little bird flying
Little bird flying


Labels:


- posted by Oleg Zabluda @ 5:15 PM | permalink | | | technorati | bloglines | feedster
 
Finished building regenerative short wave radio with Marianna Dizik

Finished building regenerative short wave radio with Marianna Dizik

Labels:


- posted by Oleg Zabluda @ 3:29 PM | permalink | | | technorati | bloglines | feedster
 
In the anticipation of summer with Marianna Dizik

In the anticipation of summer with Marianna Dizik

Labels:


- posted by Oleg Zabluda @ 3:09 PM | permalink | | | technorati | bloglines | feedster
 
Chilling out with Marianna Dizik

Chilling out with Marianna Dizik

Labels:


- posted by Oleg Zabluda @ 2:42 PM | permalink | | | technorati | bloglines | feedster
 
Petting street cat on LA RUE DU CHAT QUI PECHE

Petting street cat on LA RUE DU CHAT QUI PECHE

Labels:


- posted by Oleg Zabluda @ 2:08 PM | permalink | | | technorati | bloglines | feedster
 
Measuring up to with Marianna Dizik

Measuring up to with Marianna Dizik

Labels:


- posted by Oleg Zabluda @ 1:55 PM | permalink | | | technorati | bloglines | feedster
 
Salesmen came out running with Marianna Dizik

Salesmen came out running with Marianna Dizik

Labels:


- posted by Oleg Zabluda @ 1:50 PM | permalink | | | technorati | bloglines | feedster
 
Giving Wozniak eye exam by correspondence

Giving Wozniak eye exam by correspondence

Labels:


- posted by Oleg Zabluda @ 1:30 PM | permalink | | | technorati | bloglines | feedster
 
A pilot entering airspace near LAX, contacts air traffic controller:
A pilot entering airspace near LAX, contacts air traffic controller:
- Request permission to go to 60,000 ft
- How the hell are you going to go up to 60,000 ft?
- I am not going up to 60,000 ft. I am going down to 60,000 ft.

There are a lot of anecdotes like that about SR-71. What makes sense in this rendition is that in US one does need permission to go down to 60,000 ft (where class A airspace ends). You can do whatever you want, and need no stinking permissions from the civilians above 60,000 ft. What doesn't make sense is that there are other aircraft which can go to 60,000 ft. U-2 (70,000 ft, 1957), F-15 (65,000 ft, 1976), F-22 (65,000, 2005). That's why I like another rendition:

- ...I am not going up to 60,000 ft. I am going down to 60,000 ft.
- How the hell are you going to go down to 60,000 ft?
- Through 80,000 ft

SR-71, introduced in 1966, had official service ceiling of 85,000 ft, and the rumored one of 98,000 ft.

SR-71 Anecdotes galore:
http://www.pistonheads.com/gassing/topic.asp?t=877721
http://www.lotustalk.com/forums/f68/sr-71-blackbird-pilots-story-50136/
https://picasaweb.google.com/lh/photo/5207DTp_LAuZqUkU0ghTMNMTjNZETYmyPJy0liipFm0

Labels:


- posted by Oleg Zabluda @ 11:43 AM | permalink | | | technorati | bloglines | feedster
 
Reading old issues of "Aviation Week & Space Technology" magazine, came across the sentence, I don't see often, but...
Reading old issues of "Aviation Week & Space Technology" magazine, came across the sentence, I don't see often, but I wish I would: "As the airplane decelerates, the [engine switches to ramjet mode] to provide sustained thrust down to around Mach 4]. How do you decelerate an air-breathing airplane to Mach 4? Read full quote below: 
"""
Passing through Mach 1.5, with drag coming down, the inlet ramp doors to the turbine engines are partially closed as the thrust from the ERJs builds up. By Mach 2 the rockets are turned off, and then at Mach 2.5 the turbine inlets are fully closed [...]


For the challenging push from Mach 2.5 to Mach 4, [engine switched to DMRJ mode].

The scramjet operates like two ramjets in this mode up to Mach 4.5, at which point the vehicle relies solely on the scramjet, [up to] Mach 7-8.

Following completion of the mission, the vehicle decelerates and the door to the ERJ is opened to provide sustained thrust down to around Mach 4. As the vehicle decelerates below Mach 3, the inlets to the turbine engines are opened and at a lower Mach number these are re-started for the final powered rendezvous with a tanker and/or recovery to a runway.
"""
http://www.military.com/features/0,15240,232190,00.html
http://en.wikipedia.org/wiki/Scramjet_programs
http://web02.aviationweek.com/aw/mstory.do?id=news/awst/2011/06/13/AW_06_13_2011_p22-332894.xml

Labels:


- posted by Oleg Zabluda @ 10:39 AM | permalink | | | technorati | bloglines | feedster

Powered by Blogger