Possible Downtime Alert
I am working to migrate THR from the current cluster to a new one. I would like to get this done before the weekend, but it's unclear what the timeframe will be, as testing is still ongoing. As I am writing this the new (rebuilt) host is doing a burn-in to ensure that everything will keep running under load.
When the migration happens users will see a Cloudflare message indicatating it cannot connect to the server. This is expected, and depending on how the migration goes this may last from 30 minutes to 3 hours - I won't know more until testing the various migration options is complete and I have finalized the plan.
More information is available in this thread.
As always, thanks so much for your patience.
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- Thread starterPancho
- Start dateJan 3, 2014
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Pancho
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Just got an email from an old fighter pilot friend of mine that said "there was an alternate way of starting a F100 Super Sabre fighter plane and that was to electrically ignite a bp cartridge that was 10" in diameter and 12" long to turn a small turbine to drive the main turbine"............go figure.
I don't know how many grains of Holy Black was in the cartridge
damoc
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Saw something like that in the old flight of the pheonix movie
A friend whose an aircraft mechanic said it used to be pretty common
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Pancho
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Yeah, I remember that. If I remember right those shells were maybe 6 or 8 gage. I have know idea what a 10" diameter shell would relate to gage.
damoc
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yeah i wonder if it was a simple shot charge like in the movie or some form of
slower burning rocket type charge.
Driftwood Johnson
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Howdy
The most common type of starters used to start aircraft radial piston engines in the 1930s and 1940s were the Coffman starters. They did not use Black Powder, they used Cordite. Also known as 'shotgun starters' they were 4 gauge.
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BowerR64
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That was to get the rotation started? insted of hand pushing the prop?
lol what a trip i remember watching videos and stuff and thinking wow that first turn is SUPER rich. I never thought of real black powder being used as a kick start haha.
Why not use carbid like the miners used in their flashlight?
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Skinny 1950
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The Sabre was a jet and to get it started the turbine had to get up to speed, it was probably a solid rocket type of thing driving a turbine direct drive as an auxiliary which would be detached.
I stand to be corrected.
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alsaqr
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As an EOD guy i destroyed thousands of jet engine starter carts.
Jet engine starter cartridges were used in some models of the B-52 and F-4 aircraft. This is a jet engine starter. The large electrically initiated starter cartridge fits in the can to the left.
http://www.ebay.com/itm/Jet-Engine-...d=100011&prg=1005&rk=1&rkt=5&sd=261343428378&
The Australian Canberra still uses jet engine starter carts:
J-Bar
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I was once told that black powder is used as propellant for ejecting pilots out of jet fighters. Can anyone definitely confirm or refute that?
whughett
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Many years ago attended an antique tractor show in Ohio. One of the behemoths on display used a large brass shell to turn over the engine. The owner started the engine several times during the day.
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jgh4445
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Hello Sir, Nice tractor. Do you reload for it?
Driftwood Johnson
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lol what a trip i remember watching videos and stuff and thinking wow that first turn is SUPER rich. I never thought of real black powder being used as a kick start haha.
Read what I wrote again. The shells used to start radial engines were not Black Powder. They were loaded with Cordite.
I was once told that black powder is used as propellant for ejecting pilots out of jet fighters. Can anyone definitely confirm or refute that?
I doubt it. Ejection seats went through a long period of development, there were many different types. But I suspect they all used solid rocket propellant, not Black Powder. By the way, I just finished reading The Right Stuff, by Tom Wolfe. This is the book the movie was patterned after. He goes through quite a description of Chuck Yeager bailing out of a NF-104 after his engine flamed out. If you have seen the movie, it is one of the last scenes. Wolfe goes into detail how the ejection seat got tangled in the lines to Yeager's chute, spilling burning residual rocket fuel into his lines and then the seat crashed into Yeager's helmet, cracking his visor and getting the smoldering fuel into his face. It was pretty clearly not Black Powder, it was solid propellent rocket fuel.
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Chawbaccer
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If you can catch an old re-run of "The Black Sheep Squadron", when the Corsair is on the runway starting, you might think it backfired but that is the starter going off.
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Starter52
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Thanks, Chawbaccer. I remember that from the old TV show. I always wondered what was going on there.
And thanks, Pancho. Great thread.
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