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piisfish

Volcanic ash - New Engine Filter concept

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FOD mods have been used on helicopter engines since the 1960s.
For example, the FOD MOD on a Sikorsky Sea King S-61/CH-3, prevents windshield ice from entering engine inlets.
Many other military helicopters (CH-47 Chinook, CH-53 Stallion, etc.) have wire screens to prevent their engines from ingesting all the dust, trash, sand, etc. they blow up while hovering.
Even the PT-6A turbo-prop engines installed in skydiving Twin Otters have inertial FOD separators and wire screens to prevent junk from entering inlets.
... which reminds me of the inlet screens on Nene 10 engines installed in T-33 jet trainers. It seems that inlet screens were installed on many early jet engines, especially those with centrifugal compressors..

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I heard that in the aftermath of Mt St Helens, a popular method to get more mileage out of automotive air filters was to improvise a pre-filter out of pantyhose..
"There are only three things of value: younger women, faster airplanes, and bigger crocodiles" - Arthur Jones.

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FOD mods have been used on helicopter engines since the 1960s.
For example, the FOD MOD on a Sikorsky Sea King S-61/CH-3, prevents windshield ice from entering engine inlets.
Many other military helicopters (CH-47 Chinook, CH-53 Stallion, etc.) have wire screens to prevent their engines from ingesting all the dust, trash, sand, etc. they blow up while hovering.
Even the PT-6A turbo-prop engines installed in skydiving Twin Otters have inertial FOD separators and wire screens to prevent junk from entering inlets.
... which reminds me of the inlet screens on Nene 10 engines installed in T-33 jet trainers. It seems that inlet screens were installed on many early jet engines, especially those with centrifugal compressors..



Of course, the issues are; they all take a marginal hit at performance and how the hell do you retrofit that crap to the existing airline fleet?

No. You won't be seeing any filters on airliners. The military helicopters do it out of necessity and don't care about the cost. Airlines have no such luxury.
quade -
The World's Most Boring Skydiver

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FOD mods have been used on helicopter engines since the 1960s.
For example, the FOD MOD on a Sikorsky Sea King S-61/CH-3, prevents windshield ice from entering engine inlets.
Many other military helicopters (CH-47 Chinook, CH-53 Stallion, etc.) have wire screens to prevent their engines from ingesting all the dust, trash, sand, etc. they blow up while hovering.
Even the PT-6A turbo-prop engines installed in skydiving Twin Otters have inertial FOD separators and wire screens to prevent junk from entering inlets.
... which reminds me of the inlet screens on Nene 10 engines installed in T-33 jet trainers. It seems that inlet screens were installed on many early jet engines, especially those with centrifugal compressors..



We have inlet particle separators on the H-60. Uses the centrifugal force from the swirling air flow to remove dirt, debris, sand, etc. Judging from some of the LZ's I've landed in, they work quite well ;)
Skydiving: You either learn from other's mistakes, or they'll learn from yours.

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O OK... my attachment didn't upload.. It was supposed to be funny...

As it is in my work computer, It will be up on monday [:/]



Nobody likes a tease
:P:D:P:D
and now.. back at work....

here is THE new filter :P
scissors beat paper, paper beat rock, rock beat wingsuit - KarlM

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