25 Apr 2024, 13:39 [ UTC - 5; DST ]
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Post subject: 441 Conquest II Torque split Posted: 16 Sep 2021, 21:30 |
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Joined: 08/05/16 Posts: 3110 Post Likes: +2226 Company: Tack Mobile Location: KBJC
Aircraft: C441
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I know there are not too many 441 pilots out there but I'm hoping for some help. Are these engine indications normal in a 441 (or any TPE-331-10)? Also what speeds are to be expected with the -10? With the different STCs, props, VGs, winglets, etc. it's hard to know what normal or good is.
And to answer your question, I have no idea why they left the packing film on the screens for two years. Glare was awful.
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Post subject: Re: 441 Conquest II Torque split Posted: 16 Sep 2021, 23:46 |
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Joined: 11/15/17 Posts: 688 Post Likes: +351 Company: Cessna (retired)
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Right engine shows significantly higher torque and fuel flow at equal EGT's.
Possible EGT problem, Left High or Right Low.
Check with bleeds off also.
Don't remember enough to go further.
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Post subject: Re: 441 Conquest II Torque split Posted: 17 Sep 2021, 14:06 |
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Joined: 11/08/12 Posts: 6326 Post Likes: +3811 Location: San Carlos, CA - KHWD
Aircraft: Piaggio Avanti
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Username Protected wrote: Matching temps on a twin turbine and expecting matching torques would be like matching CHTs on a Baron and being surprised when fuel flow and manifold pressures didn't match. I dunno, my engines match pretty close. 1% TQ difference and 5deg Temp difference maybe. A pound or two fuel flow difference.
_________________ -Jon C.
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Post subject: Re: 441 Conquest II Torque split Posted: 17 Sep 2021, 16:30 |
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Joined: 06/09/09 Posts: 4573 Post Likes: +3298
Aircraft: C182P, Merlin IIIC
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RH fuel flow seems high for the altitude. I’d have the EGT comps checked, ΔP/P and temp probes also. LH fuel flow seems much closer to what I’d expect for the altitude.
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Post subject: Re: 441 Conquest II Torque split Posted: 17 Sep 2021, 18:35 |
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Joined: 05/29/09 Posts: 4181 Post Likes: +2974 Company: Craft Air Services, LLC Location: Hertford, NC
Aircraft: D50A
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Username Protected wrote: Matching temps on a twin turbine and expecting matching torques would be like matching CHTs on a Baron and being surprised when fuel flow and manifold pressures didn't match. I dunno, my engines match pretty close. 1% TQ difference and 5deg Temp difference maybe. A pound or two fuel flow difference.
Do you think yours naturally match that nicely or did the mechanics trim the indications to make them match like that? I always figured engines were like kids, they are all just a little different no matter how similarly they are raised. In any case, I'd think that you would want to match RPM and Torque which will give identical HP on each wing and then describe the differences in the engine performance as fuel flow and temp, not match RPM and temps and describe the differences as torque and fuel flow.
_________________ Who is John Galt?
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Post subject: Re: 441 Conquest II Torque split Posted: 17 Sep 2021, 19:27 |
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Joined: 06/09/09 Posts: 4573 Post Likes: +3298
Aircraft: C182P, Merlin IIIC
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The mechs trim the EGT compensation to get em to match.
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Post subject: Re: 441 Conquest II Torque split Posted: 18 Sep 2021, 00:09 |
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Joined: 12/03/14 Posts: 19252 Post Likes: +23622 Company: Ciholas, Inc Location: KEHR
Aircraft: C560V
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Username Protected wrote: The mechs trim the EGT compensation to get em to match. Not generally in my experience. For my former TPE331 engines, the EGT compensation was set on the test stand during the overhaul dyno run. They have never been adjusted. Torques are set with a precise pressure table also generated on the dyno to calibrate the torque sensor. Fuel flow is by impeller sensor and isn't adjustable in anyway (at least not on an MU2). My gauges matched quite nicely, like Carlson's did. Mike C.
_________________ Email mikec (at) ciholas.com
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