 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
alderman.kevin0610(at)gma
Guest
|
 Posted: Tue Apr 30, 2013 2:27 am Post subject: KIS-List Digest: 2 Msgs - 04/29/13 |
 |
|
A turbine is a good engine, but not for our general use. The biggest factor is fuel burn There is a small helicopter that uses a 100 hp SOLAS turbine for power. It is small, light and responsive. It burns 9 GPH at idle on the ground, and making 100 HP it burns closer to 14 GPH. Turbines are great for high altitude high speed flight, for flight in our normal flight regime it will work but the fuel costs are multitudes higher.
Also, turbines such as the SOLAS operate at high speeds around 50,000 RPM, and as such need a gearbox to reduce the engine speed to prop speed. The Helicopter supplier makes their own, you would have to find one somewhere.
Turbines have a very very narrow power and engine speed range. The power is varied by a CS prop. Your gearbox will have to be able to support a CS prop and include a governor. The engine itself will (or should) have a controller that controls/ limits engine RPM, but you will still need a method of controlling the prop pitch.
In a turboprop like a Pilatus, it goes like this: The engine is started at ground idle, which is a turbine speed of around 80% of flight speed, i.e. 40K RPM. After warm up and taxi, the engine is brought up to flight cruise power and the prop is cycled somewhat similar to our run-up with a piston recip. For takeoff, the throttle is pushed to takeoff and the prop full forward for maximum THRUST. At altitude, the throttle is pulled back to flight cruise, the prop placed in cruise and off we go.
Turbine engines are only cost efficient at high altitudes and high speeds. Most jet operators will tell you that if they had to fly below 30K feet all the time they couldn't afford the fuel.
Another added benefit of a turbine is pressurization- they take compressed high pressure air from the cold- compressor- section and send it into the cabin. The air is hot from compression, and doubles as cabin heat. If you aren't going to fly at the flight levels, this is another waste of power.
I am building a Wheeler Express- after flights to Central America, the Bahamas, and other places that do not have Avgas, I thought about a 300HP turbine. My plane with a 300 HP gas engine will burn around 12 gph at 180 kts at 14,500 ft. My 100 gal fuel capacity will give me more than a 1000 mile range. The 300 HP turbine fuel burn is closer to 28 GPH in flight even at FL 180. Cuts my range in half, even though I gain 30 kts in speed.
Kevin Alderman
Avionics Tech/ Aircraft restoration
Building a Wheeler Express with a Mazda Rotary 13B turbo- 300 HP- 3 moving parts.
On Tue, Apr 30, 2013 at 3:00 AM, KIS-List Digest Server <kis-list(at)matronics.com (kis-list(at)matronics.com)> wrote:
[quote]*
=========================
Online Versions of Today's List Digest Archive
=========================
Today's complete KIS-List Digest can also be found in either of the
two Web Links listed below. The .html file includes the Digest formatted
in HTML for viewing with a web browser and features Hyperlinked Indexes
and Message Navigation. The .txt file includes the plain ASCII version
of the KIS-List Digest and can be viewed with a generic text editor
such as Notepad or with a web browser.
HTML Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter=2013-04-29&Archive=KIS
Text Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter=2013-04-29&Archive=KIS
================================================
EMail Version of Today's List Digest Archive
================================================
----------------------------------------------------------
KIS-List Digest Archive
---
Total Messages Posted Mon 04/29/13: 2
----------------------------------------------------------
Today's Message Index:
----------------------
1. 04:59 AM - Re: Turbine (ALFRED ROSA)
2. 06:45 AM - Re: Turbine (Galin Hernandez)
________________________________ Message 1 _____________________________________
Time: 04:59:55 AM PST US
Subject: Re: Turbine
From: ALFRED ROSA <fredorosa(at)gmail.com (fredorosa(at)gmail.com)>
Just wondering what advantage you are hoping to achieve with a turbine?
Also, If you need a Cruiser without engine and avionics, I have one in my
garage.
Al
On Mon, Apr 29, 2013 at 12:55 AM, John Petrie <jpetrie(at)sonicfactory.co.za (jpetrie(at)sonicfactory.co.za)>wrote:
>
> Hi all,
>
> It's been a while since I last posted on this group, largely due to the
> fact that I sold my KIS Cruiser.
> I am now looking for a new project and am considering buying my Cruiser
> back and fitting a turbine engine. I know absolutely nothing about
> turbines, and hence the reason for this post. If anyone can point me in
> the right direction or provide some other useful information, I'm all ears.
> Thanks a mil.
>
> John Petrie
> Sonic Factory
> 082 574 6190
> Sent from my mobile
>
>
________________________________ Message 2 _____________________________________
Time: 06:45:52 AM PST US
From: Galin Hernandez <galinhdz(at)gmail.com (galinhdz(at)gmail.com)>
Subject: Re: Turbine
Now THAT sounds like a cool project. I think 100LL will eventually go away
and a Jet-A type alternative is a good idea. Besides, it sounds like fun to
do.
On Sun, Apr 28, 2013 at 11:55 PM, John Petrie <jpetrie(at)sonicfactory.co.za (jpetrie(at)sonicfactory.co.za)>wrote:
>
> Hi all,
>
> It's been a while since I last posted on this group, largely due to the
> fact that I sold my KIS Cruiser.
> I am now looking for a new project and am considering buying my Cruiser
> back and fitting a turbine engine. I know absolutely nothing about
> turbines, and hence the reason for this post. If anyone can point me in
> the right direction or provide some other useful information, I'm all ears.
> Thanks a mil.
>
> John Petrie
> Sonic Factory
> 082 574 6190
> Sent from my mobile
>
>
===========
rget="_blank">http://www.matronics.com/Navigator?KIS-List
===========
http://forums.matronics.com
===========
le, List Admin.
="_blank">http://www.matronics.com/contribution
===========
[b]
| | - The Matronics KIS-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?KIS-List |
|
|
|
| Back to top |
|
 |
gbrighton(at)skymesh.com.
Guest
|
| Posted: Tue Apr 30, 2013 5:10 am Post subject: KIS-List Digest: 2 Msgs - 04/29/13 |
|
|
Great Reply Kevin ,
But few more moving parts than 3 hey .!! ... with the Turbo ... and gearbox too .. and what gearbox are u intending use/try .... ? not much available with proven hours and or tested TV analysis ..!!??
Graham
| | - The Matronics KIS-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?KIS-List |
|
|
|
| Back to 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 vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
