03 Dec 2025, 05:56 [ UTC - 5; DST ]
|
| Username Protected |
Message |
|
Username Protected
|
Post subject: Re: Phenom 100E , Cessna M2 or Hondajet? Posted: 05 Nov 2018, 22:20 |
|
 |

|
|
Joined: 07/10/17 Posts: 82 Post Likes: +39
|
|
Username Protected wrote: For a PC12/Denali to go from 275kts to 320kts to compete with the TBM, that's a 15% speed increase and a 30% drag increase with 30% more engine power needed. Basic physics of flight stuff: - Drag is proportional to speed squared. - Power required is proportional to speed cubed. So: - Speed increase = 320kts/275kts = 1.16 (16% increase) - Drag increase = 1.16 ^ 2 = 1.35 (35% increase) - Power required = 1.16 ^ 3 = 1.58 (58% increase) So to make a PC12 go 320 kts without changing the drag coefficient significantly would require an engine/prop combo to make 58% more power than now. That's a pretty big bump! Range would go to hell since for a turbine fuel flow is proportional to power, too.
That's true for bodies being dragged thru the air (parasitic drag) ... but not for things generating lift (induced drag). Induced drag *decreases* with airspeed.
I don't know what portion of the PC12 in cruise is induced drag, but for an A320/B737 in cruise, it's about 30% and that's basically the same plane as a PC-12 :-)
So it would take maybe only a 35% increase maybe.
|
|
| Top |
|
|
Username Protected
|
Post subject: Re: Phenom 100E , Cessna M2 or Hondajet? Posted: 06 Nov 2018, 00:00 |
|
 |

|
|
Joined: 01/31/09 Posts: 5193 Post Likes: +3038 Location: Northern NJ
Aircraft: SR22;CJ2+;C510
|
|
Username Protected wrote: Connecticut to Ft. Lauderdale isn't "west bound in winter".
Right now headwinds West bound ATL to ASE are -67@FL450 and -59@FL260 and -36@16,500'
I'd do the whole thing at 16,500' VFR in 5 hours.. CJ3 could do it at FL400 in 3:35 non stop. What’s your fuel burn and TAS at 16.5? I have yet to find a day with big wind where it was significantly lighter at 16 to warrant flying there vs the 20s. I take a pretty good fuel hit for being there. Speed is virtually unchanged from 280. I know they exist, I just always see 100kts at 28 and 80kts at 16.5
Since the thread topic is M2 here are the M2 numbers.
Note that you can have a 100kt headwind at FL410 versus 0 at 17K and have better range climbing to FL410.
You need a gradient of close to 6kt/1000' to make it worthwhile flying at 17K vs FL410 in a turbojet. Most of the time you find gradients of 3 - 4kts/1000' or less in winds as you climb.
Attachment: 2018-11-05_2257_001.png
Attachment: 2018-11-05_2258.png
Please login or Register for a free account via the link in the red bar above to download files.
_________________ Allen
|
|
| Top |
|
|
Username Protected
|
Post subject: Re: Phenom 100E , Cessna M2 or Hondajet? Posted: 06 Nov 2018, 08:09 |
|
 |

|
|
 |
Joined: 01/29/08 Posts: 26338 Post Likes: +13085 Location: Walterboro, SC. KRBW
Aircraft: PC12NG
|
|
Username Protected wrote: A reason to get a 400knot jet is to literally never fly piston engine ground speeds again. Assuming the jet you buy has better range/load capability than the turboprop you already have. To accomplish this from a PC12 requires a Phenom 300 or a PC24 for $10MM. Or $6.8MM to $10MM used. Plus 2X the cost to operate it. The Phenom 100, M2 and Hondajet would slow me down. I could sell my PC12, pocket a million $$ and buy a used one and I still haven't done it. You're going ZERO mph sitting and the fbo getting gas.
|
|
| Top |
|
|
Username Protected
|
Post subject: Re: Phenom 100E , Cessna M2 or Hondajet? Posted: 06 Nov 2018, 08:14 |
|
 |

|
|
 |
Joined: 01/29/08 Posts: 26338 Post Likes: +13085 Location: Walterboro, SC. KRBW
Aircraft: PC12NG
|
|
Username Protected wrote: You need a gradient of close to 6kt/1000' to make it worthwhile flying at 17K vs FL410 in a turbojet. Most of the time you find gradients of 3 - 4kts/1000' or less in winds as you climb.
You also need to be flying by yourself because you have no full fuel payload. Even CJ3 hauls only 850Lbs with full fuel. Pilatus hauls 1200lbs with full fuel. Both planes have the same range on paper. The new Phenom 1300 hauls 1450 with full fuel. Again, same range.
|
|
| Top |
|
|
Username Protected
|
Post subject: Re: Phenom 100E , Cessna M2 or Hondajet? Posted: 06 Nov 2018, 08:20 |
|
 |

|
|
Joined: 01/31/09 Posts: 5193 Post Likes: +3038 Location: Northern NJ
Aircraft: SR22;CJ2+;C510
|
|
Username Protected wrote: You also need to be flying by yourself because you have no full fuel payload.
Even CJ3 hauls only 850Lbs with full fuel. ... Sorry to hear that you weigh 850 lbs. Some folks can do a lot with 850lbs of payload.
_________________ Allen
|
|
| Top |
|
|
Username Protected
|
Post subject: Re: Phenom 100E , Cessna M2 or Hondajet? Posted: 06 Nov 2018, 08:32 |
|
 |

|
|
 |
Joined: 01/29/08 Posts: 26338 Post Likes: +13085 Location: Walterboro, SC. KRBW
Aircraft: PC12NG
|
|
Username Protected wrote: Sorry to hear that you weigh 850 lbs. Some folks can do a lot with 850lbs of payload. M2 full fuel payload is 500lbs. Your post was about the M2..... remember? Also, what are "hot and high" requirements for the M2 at MGW?
|
|
| Top |
|
|
Username Protected
|
Post subject: Re: Phenom 100E , Cessna M2 or Hondajet? Posted: 06 Nov 2018, 08:33 |
|
 |

|
|
Joined: 11/07/11 Posts: 859 Post Likes: +484 Location: KBED, KCRE
Aircraft: Phenom 100
|
|
Username Protected wrote: Connecticut to Ft. Lauderdale isn't "west bound in winter".
oh how I wish. Our winter winds shoot up the coast to the Northeast. The good news is I'm flying SC to MA tomorrow so it's in my favor this round. Chip-
|
|
| Top |
|
|
Username Protected
|
Post subject: Re: Phenom 100E , Cessna M2 or Hondajet? Posted: 06 Nov 2018, 08:38 |
|
 |

|
|
 |
Joined: 01/29/08 Posts: 26338 Post Likes: +13085 Location: Walterboro, SC. KRBW
Aircraft: PC12NG
|
|
Username Protected wrote: oh how I wish. Our winter winds shoot up the coast to the Northeast. The good news is I'm flying SC to MA tomorrow so it's in my favor this round.
Chip- Our? I'm in Atlanta. I fly to TEB all the time. I do it VFR Direct both ways nowadays staying on the West side of the SFRA. Much faster than being on a FP and almost a dead straight line. Easy coast travel is not the reason I want the jet. It's strictly for West Bound in Winter. If I lived in CT like Allen I would have the jet.
|
|
| Top |
|
|
Username Protected
|
Post subject: Re: Phenom 100E , Cessna M2 or Hondajet? Posted: 06 Nov 2018, 08:47 |
|
 |

|
|
Joined: 01/31/09 Posts: 5193 Post Likes: +3038 Location: Northern NJ
Aircraft: SR22;CJ2+;C510
|
|
Username Protected wrote: Sorry to hear that you weigh 850 lbs. Some folks can do a lot with 850lbs of payload. M2 full fuel payload is 500lbs. Your post was about the M2..... remember? Also, what are "hot and high" requirements for the M2 at MGW?
Sorry, so you only weigh 500lbs. Ok.
How hot, how high? Leadville at +30C?
_________________ Allen
|
|
| Top |
|
|
Username Protected
|
Post subject: Re: Phenom 100E , Cessna M2 or Hondajet? Posted: 06 Nov 2018, 10:20 |
|
 |

|
|
Joined: 01/31/09 Posts: 5193 Post Likes: +3038 Location: Northern NJ
Aircraft: SR22;CJ2+;C510
|
|
Username Protected wrote: Hey Allen - Can you post the range chart for the m2? I didn’t realize it was just as fast at 41 as it is in the low 30s. The LRC specific fuel consumptions look better than than the Honda jets. Attachment: 2018-11-06_0918_001.png Attachment: 2018-11-06_0917.png Attachment: 2018-11-06_0917_001.png Attachment: 2018-11-06_0918.png
Please login or Register for a free account via the link in the red bar above to download files.
_________________ Allen
|
|
| Top |
|
|
Username Protected
|
Post subject: Re: Phenom 100E , Cessna M2 or Hondajet? Posted: 06 Nov 2018, 11:44 |
|
 |

|
|
 |
Joined: 01/29/08 Posts: 26338 Post Likes: +13085 Location: Walterboro, SC. KRBW
Aircraft: PC12NG
|
|
Username Protected wrote: Sorry, so you only weigh 500lbs. Ok. How hot, how high? Leadville at +30C?  You're deflecting..... why? The conversation doesn't need to be this difficult. No, not Leadville (which I have done with 8 on board plus bags and flown non stop all the way back to Atlanta in the Pilatus). How about EGE? Yes, if you fly around by yourself, the M2 checks all the boxes. The charts you posted don't tell the whole story.
Last edited on 06 Nov 2018, 11:48, edited 1 time in total.
|
|
| Top |
|
|
Username Protected
|
Post subject: Re: Phenom 100E , Cessna M2 or Hondajet? Posted: 06 Nov 2018, 11:46 |
|
 |

|
|
 |
Joined: 01/29/08 Posts: 26338 Post Likes: +13085 Location: Walterboro, SC. KRBW
Aircraft: PC12NG
|
|
Username Protected wrote: Some people should really just have turbo props. Some people need jets. whats the issue here? Keep the 12. Sounds like for you, it walks on water. Why does there need to be an issue? I thought we were comparing airplanes? I'm in the market. I need to do this. The M2 would probably meet all my needs...... until I want to bring a few friends along then it blows up. Going places alone is no fun.
|
|
| Top |
|
|
Username Protected
|
Post subject: Re: Phenom 100E , Cessna M2 or Hondajet? Posted: 06 Nov 2018, 12:03 |
|
 |

|
|
Joined: 01/31/09 Posts: 5193 Post Likes: +3038 Location: Northern NJ
Aircraft: SR22;CJ2+;C510
|
|
Username Protected wrote: Sorry, so you only weigh 500lbs. Ok. How hot, how high? Leadville at +30C?  You're deflecting..... why? The conversation doesn't need to be this difficult. No, not Leadville (which I have done with 8 on board plus bags and flown non stop all the way back to Atlanta in the Pilatus). How about EGE? Yes, if you fly around by yourself, the M2 checks all the boxes. The charts you posted don't tell the whole story.
So tell us the whole story.
Someone asked you for PC12 charts. I don't see them posted.
Maybe other people focus on what the turbojets in the subject do well versus you wanting to be a hater and focusing on what they don't do. The charts I posted speak for themselves.
_________________ Allen
|
|
| 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
|
|
|
|