banner
banner

07 Dec 2019, 12:08 [ UTC - 5; DST ]


Greenwich AeroGroup



Reply to topic  [ 1341 posts ]  Go to page Previous  1 ... 78, 79, 80, 81, 82, 83, 84 ... 90  Next
Username Protected Message
 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 09 Nov 2019, 20:54 
Offline


User avatar
 Profile

Joined: 07/21/08
Posts: 4403
Post Likes: +4045
Location: Decatur , TX (XA99)
Aircraft: 340, Frankenplane
I hate it when someone rips out pages of a book and then wont tell you how it ended.

_________________
C340 recurrent 10/18


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 10 Nov 2019, 21:45 
Online


User avatar
 Profile

Joined: 12/22/07
Posts: 5176
Post Likes: +3074
Company: Chem Trails of MI
Location: KPTK (SE Michigan)
Aircraft: C205
Perhaps this thread is now ...

http://youtu.be/vxfi7XMS8pw

_________________
Doug
Pensioner & flying on the taxpayers' dime.


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 10 Nov 2019, 21:52 
Offline


User avatar
 Profile

Joined: 07/21/08
Posts: 4403
Post Likes: +4045
Location: Decatur , TX (XA99)
Aircraft: 340, Frankenplane
OK, I give up. What happened??

_________________
C340 recurrent 10/18


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 10 Nov 2019, 22:21 
Offline


 Profile

Joined: 01/18/11
Posts: 5445
Post Likes: +2151
Location: Lake Marion, SC KOGB
Aircraft: B60 Duke
I know five crazy people, i am two of them. I must be bipolar
I once was fast, then i gained weight.


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 10 Nov 2019, 23:09 
Offline



 Profile

Joined: 06/28/14
Posts: 845
Post Likes: +594
Location: Pleasanton , TX (KPEZ)
Aircraft: 1963 Bonanza P35
I am asking because I have no idea... but how hard would it be to take that motor off of the raptor and replace it with something that is already tested and proven? How many hours would that take? What motor could be used?

If Peter did that then he could possibly keep working on this motor on the test stand and developing it and working out all of the bugs. At the same time he could start to fly the raptor and get some basic test data and start building hours. Personally there are just to many queston marks with this project at this point to see anyone wanting to fly it with the current power plant. Maybe he will find someone to do it, but I suspect he is going to have to do it himself at some point and I think that is a huge mistake as well.


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 11 Nov 2019, 01:43 
Offline


 Profile

Joined: 02/04/18
Posts: 54
Post Likes: +6
Aircraft: C180
The Celera 500 apparently flew for the first time this week. Size differnces aside, could this possibly achieve the type of breakthrough gains that the Raptor project was/is trying to deliver.


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 11 Nov 2019, 02:11 
Offline


User avatar
 WWW  Profile

Joined: 05/06/14
Posts: 3266
Post Likes: +3041
Company: The French Tradition
Location: KCRQ - Carlsbad - KHHR
Aircraft: 89 A36 TN, 78 Tiger
I am going to miss Chris Close... or who ever he was.
oh yeah, Fly Raptor, Fly...

and I really hope that the test pilot takes his time on the preflight.... :ohno:

_________________
Bonanza 89 A36 Turbo Norm
Grumman Tiger 79


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 11 Nov 2019, 06:15 
Offline


User avatar
 Profile

Joined: 05/11/10
Posts: 9093
Post Likes: +6303
Location: Indiana
Aircraft: Cessna 185
Username Protected wrote:
OK, I give up. What happened??

That cat moved on to another sandbox, I suspect.


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 11 Nov 2019, 08:56 
Offline


 Profile

Joined: 01/18/11
Posts: 5445
Post Likes: +2151
Location: Lake Marion, SC KOGB
Aircraft: B60 Duke
The dreaded reverse polarity


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 11 Nov 2019, 09:43 
Offline



 Profile

Joined: 06/28/14
Posts: 845
Post Likes: +594
Location: Pleasanton , TX (KPEZ)
Aircraft: 1963 Bonanza P35
I have never heard of the Celera 500 until today. I don't know anything about it but to me that this is UGLY. Maybe I am the only one.


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 11 Nov 2019, 09:55 
Online


User avatar
 Profile

Joined: 02/28/17
Posts: 162
Post Likes: +109
Aircraft: Velocity XL-RG
No, it's ugly. :)

And it's going to have to takeoff and land on an almost flat attitude given the location of the main gear and the prop clearance.

I'm really curious about the planned 400kts at 65,000' with 30-40MPG with a prop and reciprocating engine. I thought a turbines are most efficient at those altitudes.


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 11 Nov 2019, 11:24 
Offline


User avatar
 Profile

Joined: 11/06/10
Posts: 10618
Post Likes: +2041
Company: Looking
Location: 6B6 - Stow, Massachusetts
Aircraft: SR22
Username Protected wrote:
No, it's ugly. :)

And it's going to have to takeoff and land on an almost flat attitude given the location of the main gear and the prop clearance.

I'm really curious about the planned 400kts at 65,000' with 30-40MPG with a prop and reciprocating engine. I thought a turbines are most efficient at those altitudes.


Don,

I am way outside my wheel house. From what I understand from physicists and mechanical engineers; there is currently no hypothetical or theoretical turbine which can match the fuel efficiency of a piston. The problem with piston engines is the complexity and the associated reliability issues.

Assuming I follow the logic; when you have a flame front and the associated expansion of the fuel in a piston you push against a defined container with solid surfaces. While in a turbine, the flame front is pushing against air. Air offers significantly less resistance, therefore it has less ability to convert to mechanical energy.

Tim


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 11 Nov 2019, 13:36 
Offline


User avatar
 Profile

Joined: 11/08/13
Posts: 1232
Post Likes: +560
Location: KCRQ
Aircraft: Breeezy, 182,601P
There is a thermodynamic limit here as well....

A piston engine can burn the fuel at much higher temperatures as the burn is intermittent.
The turbine being a continuous process its hard to get the high burn temperatures...

The Heat engine efficiency is related to the difference between the peak temperature and the heat sink or dump temperature in any heat engine.

While not exactly related to the otto(piston) or Bryaton(Jet) cycles carnot is the theoretical upper limit in possible heat engine efficiency,

eff=(1-(Tcold/Thot))
Where temperatures are absolute temperatures.


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 11 Nov 2019, 14:23 
Offline


User avatar
 Profile

Joined: 09/29/10
Posts: 4343
Post Likes: +3012
Company: USAF Simulator Instructor
Location: Wichita Valley Airport
Aircraft: Bonanza G35
Username Protected wrote:
I have never heard of the Celera 500 until today. I don't know anything about it but to me that this is UGLY. Maybe I am the only one.

I hadn’t either. In my book, Otto Aviation Group is going about this the right way: don’t make any announcements until you have something concrete to announce. I wonder where they are getting their funding?

FWIW, I don’t think the Celera is ugly but I can see why some hide-bound traditionalists might think so.
:bud:


Top

 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 11 Nov 2019, 14:53 
Offline


 WWW  Profile

Joined: 05/03/18
Posts: 394
Post Likes: +135
Aircraft: 182P
Username Protected wrote:
I have never heard of the Celera 500 until today. I don't know anything about it but to me that this is UGLY. Maybe I am the only one.

I hadn’t either. In my book, Otto Aviation Group is going about this the right way: don’t make any announcements until you have something concrete to announce. I wonder where they are getting their funding?

FWIW, I don’t think the Celera is ugly but I can see why some hide-bound traditionalists might think so.
:bud:


Am I the only one with a Celera flashback to the X-1?
Image
_________________
http://welch.com/n46pg/


Top

Display posts from previous:  Sort by  
Reply to topic  [ 1341 posts ]  Go to page Previous  1 ... 78, 79, 80, 81, 82, 83, 84 ... 90  Next



uAvionix (banner)

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

Jump to:  

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 2007-2019

.Bendix_85x50(1).png.
.headsetsetc_Small_85x50.jpg.
.centex-85x50.jpg.
.planelogix-85x100-2015-04-15.jpg.
.lopresti_85x50.jpg.
.saint-85x50.jpg.
.tat-85x100.png.
.airplanesusa-85x50.png.
.temple-85x100-2015-02-23.jpg.
.McPeck_85x50.jpg.
.byerlyaviation-85x50.png.
.ps_engineering.gif.
.Electroair.jpg.
.kadex-85x50.jpg.
.jandsaviation-85x50.jpg.
.avidyne-85x50-2017-11-22.jpg.
.bpt-85x50-2019-07-27.jpg.
.MountainAirframe.jpg.
.methodseven-85x50.jpg.
.avionicssource-85x50.jpg.
.wilco-85x100.png.
.Expert_Aircraft_Solution_85x50.jpg.
.westsky.jpg.
.FreeFlight_85x50.jpg.
.ei-85x150.jpg.
.fortner-85x50.jpg.
.airpower-85x50.jpg.
.kingairacademy-85x100.png.
.Rocky-Mountain-Turbine-85x100.jpg.
.STLAir_85x50.jpg.
.Showalter.jpg.
.heartlandsm.jpg.
.instar.jpg.
.sureflight-85x50.jpg.
.sierratrax-85x50.jpg.
.Outright_85_50.png.
.Steel_85x50.jpg.
.daytona.jpg.
.Latitude.jpg.
.rtc-85x200.jpg.
.L3_85x100.jpg.
.tulsair-85x50.jpg.
.gallagher_85x50.jpg.
.aviationdesigndouble.jpg.
.uavionix-85x50.png.
.truecourse.jpg.
.blackhawk-85x100-2019-09-25.jpg.
.Genesys_85x50.jpg.
.geebee-85x50.jpg.
.airmart-85x150.png.
.avfab-85x50-2018-12-04.png.
.tempest.jpg.
.Marsh.jpg.
.CiESVer2.jpg.
.Trace.jpg.
.pdi-85x50.jpg.
.garmin-85x200-2019-11-01.jpg.
.selectairparts-85x100.jpg.
.KalAir_Black.jpg.
.wildblue-85x50.jpg.
.cav-85x50.jpg.
.dshannon.jpg.
.ForeFlight.jpeg.
.AAI.jpg.
.aircraftassociates-85x50.png.
.Anrim_85x200.png.
.kingairdom.jpg.
.SCA.jpg.
.weatherspork_85x50.jpg.
.tas-85x50.jpg.
.Wentworth_85x100.JPG.
.dbm.jpg.
.jetacquisitions-85x50.png.
.jetaviva-85x50.jpg.
.chairmanaviation-85x50.jpg.
.cubcrafters.jpg.
.bkool-85x50-2014-08-04.jpg.
.Davis_Aviation_85x50.jpg.
.hpair-85x50.jpg.
.ABS-85x100.jpg.
.midwest2.jpg.
.camguard.jpg.