29 May 2025, 14:30 [ UTC - 5; DST ]
|
Username Protected
|
Post subject: Re: Piper Malibu Posted: 13 Sep 2018, 15:00 |
|
 |

|
|
Joined: 03/03/15 Posts: 39 Post Likes: +27 Location: KJGG
Aircraft: PA46-310P
|
|
A 70dB cabin in cruise. The ability for passenger to easily move in/out copilot seat to back in flight. Real radar (on some)
|
|
Top |
|
Username Protected
|
Post subject: Re: Piper Malibu Posted: 13 Sep 2018, 21:15 |
|
 |

|
|
Joined: 03/15/16 Posts: 670 Post Likes: +365 Location: Charlotte NC
Aircraft: Piper Mirage
|
|
Paul, Agreed. My mmopa instructor has also taught me that same technique.
|
|
Top |
|
Username Protected
|
Post subject: Re: Piper Malibu Posted: 13 Sep 2018, 22:25 |
|
 |

|
|
 |
Joined: 05/06/13 Posts: 1847 Post Likes: +1188 Location: DeLand, Florida KDED
Aircraft: 1984 A36 (TAT TN)
|
|
Username Protected wrote: It's almost impossible for an unpressurized airplane to win in comparison to a pressurized one and on the "I-want-it-scale" that feature does weigh heavily in favor of the Malibu. Thanks for the feedback from everybody. Gives me good sense of what is gained, for the costs involved, in comparison to adding the TN kit to my A36.
|
|
Top |
|
Username Protected
|
Post subject: Re: Piper Malibu Posted: 14 Sep 2018, 09:49 |
|
 |

|
|
Joined: 03/03/15 Posts: 39 Post Likes: +27 Location: KJGG
Aircraft: PA46-310P
|
|
Username Protected wrote: Quote: Only reason to NOT leave the cabin controller on field elevation is because you are in some sort of rocket missile like a lear or Ultra that is capable of outclimbing the cabin once the controller reaches max differential. With regards to being easier on the airframe setting the controller to cruise altitude and letting the cabin altitude slowly increase, I do not believe this is gentler on anything (ears included).
Agree. I have flown Malibus/Mirages for the last 10 years and I also now fly a TBM. I leave pressurization at field elevation plus 1000 throughout the flight unless I am landing at a higher or lower elevation then I adjust it to that elevation plus 1000. I have played around with setting it to altitude once there and never saw a difference so I leave it alone. (note the pressurization controls in the PA46 and TBM are the same so I cannot speak to other aircraft). The instructor that taught me to do this is a 10k hour pilot and IA. The only reason to set it to cruise altitude (per the POH) is because you'll have still have safety in the loop. The set outflow valve, run by the controller, will be the one regulating pressure just shy of the max diff (i.e. 5.5psi) and the safety outflow valve will remain shut. If the primary fails you have a backup that will open at max diff (i.e. 5.6psi). If you set the controller to field elevation your primary outflow valve will remain shut you are relying solely on the safety outflow valve to keep the cabin from over pressurizing with no safety if it fails.
|
|
Top |
|
Username Protected
|
Post subject: Re: Piper Malibu Posted: 14 Sep 2018, 18:01 |
|
 |

|
|
 |
Joined: 08/15/11 Posts: 2575 Post Likes: +1178 Location: Mandan, ND
Aircraft: V35
|
|
Username Protected wrote: In my Conquest, if I leave the cabin on field elevation, when I hit max diff. (around 13,000’) the cabin climbs too fast for comfort. That’s why I set it to cruising altitude -500’ and then set the rate controller to a nice leisurely climb. Agreed on turbines. It might be (guessing) that a Malibu/Mirage climbs fairly slow (relative) and needs to descend slow for shock cooling protection. So maybe running the controller that way works with slower climb/descent? I know I have not paid attention and "caught" the controller before. Embarrassing and not fun.
|
|
Top |
|
Username Protected
|
Post subject: Re: Piper Malibu Posted: 31 Oct 2023, 22:55 |
|
 |

|
|
Joined: 10/19/23 Posts: 9
Aircraft: Beech Queenair
|
|
Username Protected wrote: Beautiful plane. Maybe I missed it ...but what is UL? Scott, Generally the Mirages have 1230lbs +/- UL. Earlier model Malibus (1984-1988) had about 100lbs more UL. My 1984 has a UL of 1417lbs after an extensive panel upgrade. Kevin
Hi Kevin,
What was the cost for the upgrade. I a looking at getting an old Mirage and upgrading it.
Thanks.
Aarron
|
|
Top |
|
Username Protected
|
Post subject: Re: Piper Malibu Posted: 02 Nov 2023, 13:58 |
|
 |

|
|
 |
Joined: 03/24/12 Posts: 117 Post Likes: +123
Aircraft: 8KCAB / C510
|
|
Username Protected wrote: They got it right with the M600, but those tubeless high pressure tires are not retrofittable. Tubeless tires can be had with a Berenger brake upgrade
|
|
Top |
|
Username Protected
|
Post subject: Re: Piper Malibu Posted: 02 Nov 2023, 14:46 |
|
 |

|
|
 |
Joined: 08/16/15 Posts: 3404 Post Likes: +4897 Location: Ogden UT
Aircraft: Piper M600
|
|
Username Protected wrote: It might be (guessing) that a Malibu/Mirage climbs fairly slow (relative) and needs to descend slow for shock cooling protection. So maybe running the controller that way works with slower climb/descent?
I know I have not paid attention and "caught" the controller before. Embarrassing and not fun. Really no reason to descend slowly in the Mirage. I typically dialed in 1000 fpm, 1500 if it worked better. Depending on how tight the cabin is, might need 18-20 MAP to maintain the pressurization. If you were to shock cool, if it exists, would be from pushing the mixture forward and dumping cold fuel on the cylinders. I descended LOP or lean as possible which has a lot of benefits. If you need you can throw out the speed brakes, Can use 1 notch of flaps, want to get down crazy fast can drop the gear. But 18-20 MP and 1000 fpm will keep you in the green arc.
_________________ Chuck Ivester Piper M600 Ogden UT
|
|
Top |
|
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum
|
Terms of Service | Forum FAQ | Contact Us
BeechTalk, LLC is the quintessential Beechcraft Owners & Pilots Group providing a
forum for the discussion of technical, practical, and entertaining issues relating to all Beech aircraft. These include
the Bonanza (both V-tail and straight-tail models), Baron, Debonair, Duke, Twin Bonanza, King Air, Sierra, Skipper, Sport, Sundowner,
Musketeer, Travel Air, Starship, Queen Air, BeechJet, and Premier lines of airplanes, turboprops, and turbojets.
BeechTalk, LLC is not affiliated or endorsed by the Beechcraft Corporation, its subsidiaries, or affiliates.
Beechcraft™, King Air™, and Travel Air™ are the registered trademarks of the Beechcraft Corporation.
Copyright© BeechTalk, LLC 2007-2025
|
|
|
|