18 Apr 2024, 10:00 [ UTC - 5; DST ]
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Post subject: Re: The definitive Piaggio P180 Avanti thread. Posted: 23 Nov 2022, 12:05 |
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Joined: 09/26/09 Posts: 1416 Post Likes: +885 Company: ElitAire Location: Columbus, OH - KCMH
Aircraft: Piaggio P180
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Username Protected wrote:
The Piaggio seems to have a rather complex de-ice system: forward wing - electric heat, main wing - turbine bleed air heat, engine intake - pneumatic boots, props - engine exhaust and nothing for the H& V stab.
What are the ice vanes?
It does sound complicated. In practice - it works great. I especially love that ICE light that indicates airframe icing is present. Ice vanes creates a centrifugal separator on the engine intake so ice doesn't make it to the expensive parts. Huge performance hit with them on. I'm probably a little conservative and get them when entering conditions where ice could be - rather than waiting till I find ice.
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Post subject: Re: The definitive Piaggio P180 Avanti thread. Posted: 23 Nov 2022, 13:42 |
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Joined: 11/08/12 Posts: 6308 Post Likes: +3800 Location: San Carlos, CA - KHWD
Aircraft: Piaggio Avanti
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Username Protected wrote: What are the ice vanes? Inertial Separator? Yes, standard PT6 inertial separator.
I agree the deice system seems like a lot of monkey motion. Especially to me, the small boots only on the engine intake. Wings and even oil cooler intake get bleed air heat, but weirdly the engine intake gets boots. I am told it may be because the heat was too much for the composite cowling. I would’ve thought that could be overcome by a metal outer lip or something, but maybe not.
_________________ -Jon C.
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Post subject: Re: The definitive Piaggio P180 Avanti thread. Posted: 23 Nov 2022, 13:45 |
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Joined: 11/08/12 Posts: 6308 Post Likes: +3800 Location: San Carlos, CA - KHWD
Aircraft: Piaggio Avanti
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Username Protected wrote: Well.............that didn't last long.
The nose actuator is leaking hydraulic fluid. No parts are available, so will go to overhaul.
50 days and 24K-75K is the estimate. Ugh, Matt I am so sorry to hear your troubles.
_________________ -Jon C.
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Post subject: Re: The definitive Piaggio P180 Avanti thread. Posted: 23 Nov 2022, 14:15 |
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Joined: 01/11/11 Posts: 1099 Post Likes: +562 Company: FUSION
Aircraft: B300ER B200 C90 DHC6
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Username Protected wrote: … engine intake gets boots. I am told it may be because the heat was too much for the composite cowling Possibly, but also because of the aft location of the exhaust stacks, far away from the air intakes up front. And the “push props” are continuously deiced [automatically] from the hot exhaust gases.
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Post subject: Re: The definitive Piaggio P180 Avanti thread. Posted: 23 Nov 2022, 15:38 |
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Joined: 11/30/12 Posts: 4006 Post Likes: +4411 Location: Santa Fe, NM (KSAF)
Aircraft: B200, 500B
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Username Protected wrote: … engine intake gets boots. I am told it may be because the heat was too much for the composite cowling Possibly, but also because of the aft location of the exhaust stacks, far away from the air intakes up front. And the “push props” are continuously deiced [automatically] from the hot exhaust gases. Yep, it's the hot air routing that is the problem. The *only* thing heated by hot air on a KA is the engine intake, which is a metal lip on a composite cowling. It's just inches from the exhaust so routing of the hot gases was easy and safe.
_________________ Be Nice
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Post subject: Re: The definitive Piaggio P180 Avanti thread. Posted: 23 Nov 2022, 15:55 |
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Joined: 11/08/12 Posts: 6308 Post Likes: +3800 Location: San Carlos, CA - KHWD
Aircraft: Piaggio Avanti
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Username Protected wrote: Yep, it's the hot air routing that is the problem. The *only* thing heated by hot air on a KA is the engine intake, which is a metal lip on a composite cowling. It's just inches from the exhaust so routing of the hot gases was easy and safe. Uh… hot air for deice comes from bleed air, not exhaust air….
_________________ -Jon C.
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Post subject: Re: The definitive Piaggio P180 Avanti thread. Posted: 23 Nov 2022, 16:14 |
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Joined: 09/11/09 Posts: 5286 Post Likes: +4199 Company: Looking Location: Tulsa, Ok
Aircraft: Baron/Bonanza
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Username Protected wrote: Yep, it's the hot air routing that is the problem. The *only* thing heated by hot air on a KA is the engine intake, which is a metal lip on a composite cowling. It's just inches from the exhaust so routing of the hot gases was easy and safe. Uh… hot air for deice comes from bleed air, not exhaust air….
Uh......not on King Airs.......KA lips are deiced with air scavenged/scooped from the exhaust, unless you're an early 90/100 that has electric inlet lip deice.
That would be difficult to do on the Piaggio, scooping the hot exhaust and piping it from the back of the engine, to the inlet in the front.
_________________ I don't have a problem with anger, I have a problem with idiots.
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Post subject: Re: The definitive Piaggio P180 Avanti thread. Posted: 23 Nov 2022, 17:16 |
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Joined: 11/08/12 Posts: 6308 Post Likes: +3800 Location: San Carlos, CA - KHWD
Aircraft: Piaggio Avanti
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Username Protected wrote: KA lips are deiced with air scavenged/scooped from the exhaust Interesting, I didn't know that. I'd've thought that the corrosive properties of combustion exhaust would make that unworkable. Quote: That would be difficult to do on the Piaggio, scooping the hot exhaust and piping it from the back of the engine, to the inlet in the front. Agreed, that would be difficult. But Piaggio uses bleed air heat for deice in a couple places (the main wings and the leading edge of the NACA scoop for the oil cooler on the bottom of the cowl), and my personal guess seems like it'd be fairly easy to use it on the engine intake too. But I'm sure there's a reason why my personal guess is wrong.
_________________ -Jon C.
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Post subject: Re: The definitive Piaggio P180 Avanti thread. Posted: 23 Nov 2022, 17:21 |
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Joined: 08/24/13 Posts: 8448 Post Likes: +3685 Company: Aviation Tools / CCX Location: KSMQ New Jersey
Aircraft: TBM700C2
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Username Protected wrote: Uh......not on King Airs.......KA lips are deiced with air scavenged/scooped from the exhaust Same on the TBM. It's free heat! It flows from the left exhaust through the engine inlet and back out the right exhaust (at least on the TBM).
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Post subject: Re: The definitive Piaggio P180 Avanti thread. Posted: 23 Nov 2022, 17:39 |
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Joined: 11/30/12 Posts: 4006 Post Likes: +4411 Location: Santa Fe, NM (KSAF)
Aircraft: B200, 500B
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Username Protected wrote: Uh......not on King Airs.......KA lips are deiced with air scavenged/scooped from the exhaust Same on the TBM. It's free heat! It flows from the left exhaust through the engine inlet and back out the right exhaust (at least on the TBM).
My KA is the same, although I think the original setup is slightly different and I have an STC to accomplish this. Parts of the circuit are Inconel and others are stainless.
IIRC correctly, the original KA setup was to scoop from both right and left and exhaust out the bottom of the lip.
_________________ Be Nice
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Post subject: Re: The definitive Piaggio P180 Avanti thread. Posted: 24 Nov 2022, 09:47 |
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Joined: 01/11/11 Posts: 1099 Post Likes: +562 Company: FUSION
Aircraft: B300ER B200 C90 DHC6
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King Air Hot Lips Drift: The Starship used Bleed Air for Engine Inlet Hot Lips. Early C90s (prior to Pitot Cowls) had electric lip boots for air inlet heat. Then, all King Airs now have the inlet lips continuously heated by exhaust gases.
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Post subject: Re: The definitive Piaggio P180 Avanti thread. Posted: 27 Nov 2022, 05:24 |
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Joined: 09/17/15 Posts: 153 Post Likes: +150 Location: LIMG / EDDK
Aircraft: PA-28 / C172
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Username Protected wrote: - What’s the latest on Piaggio’s ownership? Last articles from the spring talked about due diligence, but that’s about it. The situation borders on farce. The fourth auction has again been halted and no buyer has been selected. The change of Italian Government further slows down the process, as the sale requires approval from the Ministry of Economic Development. Voluntary employee layoff continue, while the Unions demands to maintain the employment level and hope the Government can force Leonardo to take over. This December marks the fourth year of receivership.
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