DiscussWorldIssues - Socio-Economic Religion and Political Uncensored Debate - View Single Post

**_tppga_** · 08-01-2012, 01:26 AM

Part of the reason for the refuelling before supersonic flight is that the only way they can be sure all the air has been purged out of the tanks is to refuel. From that point on, nitrogen is used to replace the burnt fuel in the tanks. It lessens the fire risk and is required for structural integrity.

Richard Graham, author of "SR-71 Revealed", talks about it in this podcast. Very interesting stuff!

http://traffic.libsyn.com/omegataupo...ingTheSR71.mp3

08-01-2012, 01:26 AM	#20
_tppga_ Join Date Oct 2005 Posts 395 Senior Member	Part of the reason for the refuelling before supersonic flight is that the only way they can be sure all the air has been purged out of the tanks is to refuel. From that point on, nitrogen is used to replace the burnt fuel in the tanks. It lessens the fire risk and is required for structural integrity. Richard Graham, author of "SR-71 Revealed", talks about it in this podcast. Very interesting stuff! http://traffic.libsyn.com/omegataupo...ingTheSR71.mp3
	Quote