Forum: F-35 Lightning II

Elite Joined: Dec 14, 2005 Posts: 586 Status: Offline

"Turbine Compressor Blade"!?!? WTF

Is that a turbine blade in the compressor? or a compressor blade in the turbine? LMAO

I agree, if the media insists on reporting "technical information" they should employ the services of a "subject matter expert" prior to releasing their story. Makes them sound like idiots. When I read things like this I wonder how accurate the rest of information can be? Rolling Eyes

Almost like CNN's "Thruster-boosters" that the F-16s use to take off when heavily loaded for combat. LMAO

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Veteran Joined: Mar 10, 2006 Posts: 329 Status: Offline

After burner, thrust booster, super fire maker, loud hot yellow thing, whats the difference? Very Happy

Next thing you know they will call it a turbocharger.

Veteran Joined: Mar 10, 2006 Posts: 329 Status: Offline

Oh yeah, and you would believe how many times I get asked about "Air Force F-14 Hornets" by people who hear something wrong in the news. Maybe they should just stick with calling them "pointy jets" and "big jets". Oh wait, there is nowhere for the A-10 then.

[quote="That_Engine_Guy"]"Turbine Compressor Blade"!?!? WTF

Is that a turbine blade in the compressor? or a compressor blade in the turbine? LMAO

Don't laugh too loud look at the CJ805 an engine that was old when I started in this business.

Elite Joined: Dec 14, 2005 Posts: 586 Status: Offline

Only the CJ805-23 of the CV990 had the "aft-fan" and so does the GE CF700 for the Sabreliner and Dassault Falcon.

I know what you're talking about though, here is a cut-away of the CF700 so others can see.

Also a photo of the unusual inlets for the CV990 that had separate airflow for the "engine core" and "aft-fan"

That's the wierdest thing I've ever seen.

Elite Joined: Dec 14, 2005 Posts: 586 Status: Offline

The "Aft-Fan" doesn't seem to be around much today unless you start looking into some of the "Unducted Fan" or "Open Rotor" designs.

Photos to illustrate...

With exception of the PW/Allison engine, the prop-turbine is a combined unit where exhaust flows directly through. The PW/A appears to use a turbine/shaft arrangement aft of the basic engine.

Elite Joined: Dec 14, 2005 Posts: 586 Status: Offline

Also found this concept shortly after my last post.

"EcoJet" concept as shown by easyJet.com

Now that is unusual! but cool... Cool

The motors look like a B|+cH to change!? Shrug

I know I've drifted off topic, sometimes tangents are fun to explore.

Regular User Joined: Oct 27, 2004 Posts: 35

That_Engine_Guy wrote:

The motors look like a B|+cH to change!? Shrug

They must be pretty efficient for bird slicing, by the looks of them... Twisted Evil

Elite Joined: Dec 14, 2005 Posts: 586 Status: Offline

Hookturn wrote:

They must be pretty efficient for bird slicing, by the looks of them... Twisted Evil

I'm sure they would be efficient slicing ANYTHING!? Glad they mounted them up above the tails. I'd hate to crew the thing otherwise... Shocked

That_Engine_Guy wrote:

Hookturn wrote:

They must be pretty efficient for bird slicing, by the looks of them... Twisted Evil

I'm sure they would be efficient slicing ANYTHING!? Glad they mounted them up above the tails. I'd hate to crew the thing otherwise... Shocked

A lot of advanced design work is being done on these concepts, for example look at the Boeing blended wing concept. The advantages of the aft fan designs are weight and fuel efficiency, the drawbacks are noise, especially cabin tonal frequencies, and containment / blade off issues.

Elite Joined: Dec 14, 2005 Posts: 586 Status: Offline

I imagine the "blade out" issues could be addressed with placement?

Seems they've thought of this by placing the engines so far aft and above the tails.

I only hope they're far enough aft that a catastrophic blade failure wouldn't damage the control surfaces.

Here is an aft view.

Back to the original subject... I wonder how well the LiftFan in the F-35 will be contained in a catastrophic failure? It does sit just behind the pilot!? Hope that case is strong, or has a shield installed between it's self and the crew.

Elite Joined: Dec 14, 2005 Posts: 586 Status: Offline

I trust this has been addressed by someone at Lockheed or Rolls Royce!? Shocked

Elite Joined: Jul 22, 2005 Posts: 820 Status: Offline

So is there a red line painted across the back of the ejection seat? Razz

Elite Joined: Dec 14, 2005 Posts: 586 Status: Offline

Perhaps the seat-pack is red? Doh

I hope there is a titanium shield behind the cockpit, or a large piece of Kevlar somewhere between that fan and the pilot. Shrug

It would make me a little nervous sitting in that seat, I don't even like to sit next to props on commuter flights!? Shocked

Forum: F-35 Lightning II

F135 blade failure could hold up STOVL JSF