Morning all, a bit foggy out there today. Have a good one!
Shimsteriom
Master Procrastinator
Morning all.
Dark and very foggy over 'ere as well.
I'll be spending the next three days showing the newbie how to do a disaster recovery test.
Dark and very foggy over 'ere as well.
I'll be spending the next three days showing the newbie how to do a disaster recovery test.
Mornin all.
Drab an grey
Drab an grey
Shimsteriom
Master Procrastinator
Shimsteriom
Master Procrastinator
Time to head off to the business continuity site, I need to find a sossij bap shop on the way,
wot will you do when you find one??Time to head off to the business continuity site, I need to find a sossij bap shop on the way,
DevonGuy
Well-Known Member
If this was AG, the usual suspects would have turned it into a Brexit thread by now.
Doing ok, trying to work out how to eat without getting sharp pain ...
And hiccups at midnight are my new least favourite thing ...
DevonGuy
Well-Known Member
Sounds crap! Good to know you're still about on here. Keep yer chin up.Doing ok, trying to work out how to eat without getting sharp pain ...
And hiccups at midnight are my new least favourite thing ...
Shimsteriom
Master Procrastinator
I will enter said sossij bap shop and acquire some bappage.wot will you do when you find one??
Hicap phill
Well-Known Member
Morning.
Hope all is well for the start of the week
Hope all is well for the start of the week
I will enter said sossij bap shop and acquire some bappage.
Did someone mention baps?
Hans Koenigsmann, Vice President of Build and Flight Reliability at SpaceX later said that sensors detected an unusual pressure rise in gas generators on two Merlin engines. “When we looked at the data, we saw that two of the engines attempted to start early, and the auto abort prevented that. By doing that, it prevented a possible hard start that could have been damaging to the engine hardware.”
The Merlin engine is powered by RP-1 kerosene and liquid oxygen, one of the oldest-used mixtures in the aerospace industry. To ignite the engine, a green-colored compound known as TEA-TEB (triethylaluminium-triethylborane) is used. TEA-TEB is a pyrophoric mixture, meaning it combusts in exposure to air.
Koenigsmann added, “You need to introduce these liquids in the right order. If you do this in the wrong order, or if you happen to throw in the liquid oxygen and the RP-1 and the igniter fluid, then what would happen is… we call it a hard start. A hard start would rattle the engine in most cases but could cause damage. So in general, you don’t want that. You want a good startup.”
“If we see the pressure rise too early, then we know the liquid is in there, and it shouldn’t be there,” he said. “And software in the engine controller then stops the whole process.”
Oops
Teams were able to analyze the engines’ startup behavior, and additional inspections found a blockage in a narrow line leading to a relief valve on the gas generator.
The vent port, which is just one-sixteenth of an inch wide, was obstructed by hardened masking lacquer. Koenigsmann described it as similar to red nail polish.
The gas generator on each Merlin engine drives a turbopump feeding RP-1 kerosene and liquid oxygen to the main combustion chamber.
Engineers at SpaceX’s McGregor test site also demonstrated that the engines performed normally after removing the blockage from the vent valve. Koenigsmann said that the issue was “very subtle,” but could’ve had some negative impact on the engine operation.
The Merlin engine is powered by RP-1 kerosene and liquid oxygen, one of the oldest-used mixtures in the aerospace industry. To ignite the engine, a green-colored compound known as TEA-TEB (triethylaluminium-triethylborane) is used. TEA-TEB is a pyrophoric mixture, meaning it combusts in exposure to air.
Koenigsmann added, “You need to introduce these liquids in the right order. If you do this in the wrong order, or if you happen to throw in the liquid oxygen and the RP-1 and the igniter fluid, then what would happen is… we call it a hard start. A hard start would rattle the engine in most cases but could cause damage. So in general, you don’t want that. You want a good startup.”
“If we see the pressure rise too early, then we know the liquid is in there, and it shouldn’t be there,” he said. “And software in the engine controller then stops the whole process.”
Oops
Teams were able to analyze the engines’ startup behavior, and additional inspections found a blockage in a narrow line leading to a relief valve on the gas generator.
The vent port, which is just one-sixteenth of an inch wide, was obstructed by hardened masking lacquer. Koenigsmann described it as similar to red nail polish.
The gas generator on each Merlin engine drives a turbopump feeding RP-1 kerosene and liquid oxygen to the main combustion chamber.
Engineers at SpaceX’s McGregor test site also demonstrated that the engines performed normally after removing the blockage from the vent valve. Koenigsmann said that the issue was “very subtle,” but could’ve had some negative impact on the engine operation.
I will enter said sossij bap shop and acquire some bappage.
I've just had some scrambled egg ....
And that went very well, no pain and it stayed down ...
This morning I has done me plaster skim over the (former) fire place. And I'm proud of the finish with only very minor blemishes to polish out as a pre-magnolia prep. I've given myself 9.5 out of ten. And world stock markets have just shot upwards - a coincidence? (or due to the new anti walrus snake oil?)
