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Engine Choice King Kolbra or Mklllxtra.

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David Lucas

Joined: 10 Jan 2006
Posts: 79
Location: Europe. based Amsterdam NL

Posted: Sat Sep 08, 2007 9:28 am Post subject: Engine Choice King Kolbra or Mklllxtra.

Hi Kolbers,

Probably in the category of 'day-dreaming' here, but;

Do you think this engine could be adapted to either the King Kolbra or the Mklllxtra. Power wise it would be OK (80 or 100HP versions), but I'm thinking of the mounting details. Interference with or changes to the frame, wing mount points, aileron control, etc. Specs, drawings and details are here  http://www.ecofly.de/download/Manual_smart_Nov_2005.pdf   I'd appreciate some feedback from you 'been there, done that, got the T shirt' people.

Thanks, David.

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John Williamson

Joined: 10 Jan 2006
Posts: 146
Location: Arlington, TX

Posted: Sat Sep 08, 2007 11:54 am Post subject: Re: Engine Choice King Kolbra or Mklllxtra.

David,



A couple of things to think about:



-very large frontal area.

-higher than wanted thrust centerline unless the Kolb fuselage has major mods done.

-for use with unleaded fuel only.

-minimum 95 octane fuel, the highest I can get here is 93 octane.

-the weight at 126 lbs is good but does not include the muffler and might not include the radiators.



I am a slow learner, but I wouldn't try to be the first again.



John Williamson

Arlington, TX



Kolb Kolbra, Rotax 912ULS, Warp Drive Prop, 1473 hours

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_________________
John Williamson
Arlington, TX

Kolbra, 912ULS, 1640 hours
http://home.tx.rr.com/kolbrapilot

NeilsenRM(at)comcast.net
Guest

Posted: Sat Sep 08, 2007 12:03 pm Post subject: Engine Choice King Kolbra or Mklllxtra.

Dave



What engine are you talking about?



Rick Neilsen

Redrive VW powered MKIIIC



---

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a58r(at)verizon.net
Guest

Posted: Sat Sep 08, 2007 12:59 pm Post subject: Engine Choice King Kolbra or Mklllxtra.

Clk on :http://www.ecofly.de/download/Manual_smart_Nov_2005.pdf

for candidate engine in Dave L.'s post.



regards,

Bob N.    FireFly 070 Old Kolb

http://www.angelfire.com/rpg/ronoy/

do not archive

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David Lucas

Joined: 10 Jan 2006
Posts: 79
Location: Europe. based Amsterdam NL

Posted: Sun Sep 09, 2007 2:49 am Post subject: Re: Engine Choice King Kolbra or Mklllxtra.

Thanks Bob,  Don't know why the Matronics web forum method of posting does not transfer the URL to the e-mail version. There probably is a method, but I don't know it.



John, Thanks for the feedback. Guess I knew that fuselarge mods would have to be done to keep the same thrust line, and if so I was hoping it wouldn't create too big an issue with other items such as the rear wing mount point or aileron control linkages etc. And, if embedded in the frame somewhat, then perhaps the frontal area would not be such an issue.



Fuel availability is not a problem over here (Europe) 95 and 98 octane lead free is the standard issue, but the running costs are a significant factor ! ! ! The cost of fuel now is around €uro 1:50 per litre, which equals about US $ 5:68 per US gallon ! Multiply that by your fuel burn per hour and you'll see why economy is such an important factor. This is why I was considering it in the first place.



Other than that, it's such a nice neat engine, quiet and economical, FADEC, injected, etc etc. Designed as a turbo from day one, not an add on = better volumetric efficiency and so on.



Oh, well. Back to the drawing board I guess. Now lets see, R for Rotax or J for Jabiru, Hmmm !



Regards to all.



David.

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slyck(at)frontiernet.net
Guest

Posted: Sun Sep 09, 2007 6:05 am Post subject: Engine Choice King Kolbra or Mklllxtra.

David, coming from the "alternative engine" school myself, it amounts  

to how much you like

building vs flying.   That little engine would be really working its  

heart out to deliver promised HP.

The mount they sell with it is primarily for a tractor set up.  It  

would take some welding/mutilation

to adapt it or create your own bed mount.  With my 3 cyl suzuki I  

deliberately used the standard

Kolb mount structure unmodified so that I or some future owner could  

very easily install an off-

the -shelf mill like a 912.

Then there is the question of how much $$ you would save, especially  

in the light of the current

terrible exchange rate.

BUT on the plus side, there is a big dose of satisfaction once you  

get it all running reliably

and having folks look at it, wondering what it is.

BB

do not archive

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bartmo(at)sbcglobal.net
Guest

Posted: Sun Sep 09, 2007 7:54 am Post subject: Engine Choice King Kolbra or Mklllxtra.

Robert,

  I am new to the Kolb list. I like the idea of Geo/Suzuki engine on my Firestar II kit. Are you pleased with your Suzuki? What redrive are you using?

  Regards, 

  Bart Morgan



robert bean <slyck(at)frontiernet.net> wrote:

  [quote]--> Kolb-List message posted by: robert bean 



David, coming from the "alternative engine" school myself, it amounts 

to how much you like

building vs flying. That little engine would be really working its 

heart out to deliver promised HP.

The mount they sell with it is primarily for a tractor set up. It 

would take some welding/mutilation

to adapt it or create your own bed mount. With my 3 cyl suzuki I 

deliberately used the standard

Kolb mount structure unmodified so that I or some future owner could 

very easily install [quote][b]

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NeilsenRM(at)comcast.net
Guest

Posted: Sun Sep 09, 2007 9:24 am Post subject: Engine Choice King Kolbra or Mklllxtra.

David



I didn't know URLs don't transfer that's why I asked.



The new optional VW mount is too wide for the Kolbra so that doesn't help. 

With that horsepower level it is imperative to get the thrust line down as 

low as possible. The cage would need some custom changes to work. As John 

indicated being the first makes it much more difficult. You should have a 

very significant improvement in mind to consider this option. I suspect that 

engine costs would not be one of them. If fuel cost is the prime 

consideration why not the Smart Car Turbo Diesel engine? I saw one flown at 

Sun N Fun two years ago that had a gear redrive. It looked like a nice 

package.



Rick Neilsen

Redrive VW powered MKIIIC

---

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