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912 installation

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albertakolbmk3

Joined: 13 Jun 2009
Posts: 69
Location: Innisfail, AB

Posted: Sun May 09, 2010 3:16 pm Post subject: 912 installation

Hi guys,



Just wondering if someone could share some pictures of their 912 installation. How does the cg work out. What size of prop? How far to the mounting face of the prop flange from the existing rear lord mounts? How much clearance to your tail boom and your flaps? Are you running a prop extension?



Thanks,



Tony

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_________________
Tony B.

Kolb MKIII C
Rotax 582
C Gearbox 3.00:1
WD 66" 3 Blade Prop

icrashrc

Joined: 16 Mar 2006
Posts: 247
Location: Mishawaka, In

Posted: Tue May 11, 2010 6:37 am Post subject: Re: 912 installation

I can't answer all your questions at the moment but here's a few pictures.



http://www.ill-eagleaviation.com/EngineInstallation.htm



68" 3 blade Warp, 4" extension from Saber. I don't remember the measurement but there's plenty of boom clearance for a 70" prop. 

Seems like John H. had a 72" Warp on for a while. Johns is a Mark 3 while mine is a Mark 3 Xtra.

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_________________
Scott

www.ill-EagleAviation.com

do not archive

John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Tue May 11, 2010 12:12 pm Post subject: 912 installation

68" 3 blade Warp, 4" extension from Saber. I don't remember the measurement 

but there's plenty of boom clearance for a 70" prop.

Seems like John H. had a 72" Warp on for a while. Johns is a Mark 3 while 

mine is a Mark 3 Xtra.



--------

Scott

Scott/Gang:



I had 3/4" prop tip to boom clearance running the 72" WD.



Running a 71" now.



Main thing I take into consideration is to get the engine as low in the 

mount as I can and still maintain sufficient clearance between the oil 

return banjo fitting and the root tube of the airframe.



CG is not a problem.



Recently replaced the 12 lb Maule Tundra Tailwheel with a 6 lb Maule solid 

rubber tailwheel.  Did not do a weight and balance, but there was no 

significant difference in the handling of the mkIII between the two 

configurations.  Biggest difference was transmission of rough field and 

pavement cracks between the 6" solid and the 8" pneumatic tailwheels.



john hauck

mkIII

Titus, Alabama

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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

capedavis(at)yahoo.com
Guest

Posted: Tue May 11, 2010 3:32 pm Post subject: 912 installation

John , just my wondering mind . Why the change havent you been using the 12 lb for a while successfully? just better weight?

 

Chris Davis

KXP 503 492 hrs

Glider Pilot

Disabled from crash building Firefly  



 

   From: John Hauck <jhauck(at)elmore.rr.com>

To: kolb-list(at)matronics.com

Sent: Tue, May 11, 2010 11:09:31 AM

Subject: Re: Re: 912 installation



--> Kolb-List message posted by: "John Hauck" <jhauck(at)elmore.rr.com (jhauck(at)elmore.rr.com)>

68" 3 blade Warp, 4" extension from Saber. I don't remember the measurement 

but there's plenty of boom clearance for a 70" prop.

Seems like John H. had a 72" Warp on for a while. Johns is a Mark 3 while 

mine is a Mark 3 Xtra.



--------

Scott

Scott/Gang:



I had 3/4" prop tip to boom clearance running the 72" WD.



Running a 71" now.



Main thing I take into consideration is to get the  engine as low in the 

mount as I can and still maintain sufficient clearance between the oil 

return banjo fitting and the root tube of the airframe.



CG is not a problem.



Recently replaced the 12 lb Maule Tundra Tailwheel with a 6 lb Maule solid 

rubber tailwheel.  Did not do a weight and balance, but there was no 

significant difference in the handling of the mkIII between the two 

configurations.  Biggest difference was transmission of rough field and 

pavement cracks between the 6" solid and the 8" pneumatic tailwheels.



john hauck

mkIII[b]

          [quote][b]

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John Hauck

Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

Posted: Tue May 11, 2010 3:39 pm Post subject: 912 installation

John , just my wondering mind . Why the change havent you been using  the 12 lb for a while successfully? just better  weight?

 

Chris Davis

 

  

  

 Chris D/Gang:

  

 I have flown the Maule 8" Tundra Tailwheel for six years.  Two  reasons I changed back to the 6" solid Maule:

  

 -I wore out the bearings, pivot and wheel, in the 8".

  

 -Thought maybe...I could get a little better cruise with the much smaller  6".

  

 Results after the change - NONE.

  

 Like I have advocated for many years, Kolbs have very wide CG  ranges.  Sometimes numbers are not quite honest.  Not telling anyone  to do anything other than what the Kolb Factory plans and instruction indicate  for building and flying Kolb aircraft, but I find them much better performers in  the air than on paper.

  

 john hauck

 mkIII

 Titus, Alabama

   [quote][b]

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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

albertakolbmk3

Joined: 13 Jun 2009
Posts: 69
Location: Innisfail, AB

Posted: Tue May 11, 2010 6:22 pm Post subject: Re: 912 installation

Thanks for the info and pics. What is your measurement from the rear lord mount holes to the face of the prop flange. Just looking for a measurement so I know how far back to mount it on the lord mounts.



Thanks,



Tony

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_________________
Tony B.

Kolb MKIII C
Rotax 582
C Gearbox 3.00:1
WD 66" 3 Blade Prop

albertakolbmk3

Joined: 13 Jun 2009
Posts: 69
Location: Innisfail, AB

Posted: Thu May 13, 2010 3:18 pm Post subject: Re: 912 installation

Could someone supply me with a measurement from the rear lord to the prop side of the prop flange of a 912 installation? It would be greatly appreciated!



Thanks,



Tony

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_________________
Tony B.

Kolb MKIII C
Rotax 582
C Gearbox 3.00:1
WD 66" 3 Blade Prop

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