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MK III X 582 TO 912ULS CONVERSION

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Jim Ballenger

Joined: 12 Jan 2006
Posts: 18
Location: Virginia Beach, Virginia

Posted: Wed Oct 25, 2006 2:19 pm Post subject: MK III X 582 TO 912ULS CONVERSION

Hello to all

  

 I wanted to share some information I  have learned since upgrading from a 582 to a 912uls with a 72" 3 bladed  WARP prop on my MK III X.  It is not cheap to upgrade but I got a break on  the engine when I bought John Hauck's old 912uls.  It is a strong running  engine well proven in the most extreme of conditions and I am very happy with  it.  

  

 I ended up lowering the leading edge of the wing by  about 5/8" to keep from getting airborne before the plane was ready to fly and  lowering the leading edge of the horizontal stab to 1/4" above the  centerline of the boom tube.  I added a trim tab to the elevator to give it  some down pressure and a large rudder trim tab to hold right rudder. I also  removed my trim tab from the left aileron that I needed with the 582  installed.

  

 My empty weight increased from 564 to 602 lbs and  the cg ranges from 26 to 34.8 so it falls within the limits.  I have the  prop pitched for straight and level WOT at 5500 rpm.  This give me a take  off climb of about 1200 fpm at 70 mph IAS with 5400 rpms.  So far some  rough performance numbers are at 5500 rpm in level flight IAS is 95  mph,  5000 rpm give me a little more than 85 mph IAS and 4500 is a little  less than 80 mph IAS.

  

 The plane trims out nicely with the way it is set  up.  I do not have to use the cockpit trim control  while solo to  maintain level flight at 5000rpm.  This will allow me to trim the airplane  with a passenger and maintain level flight with in limits I hope.  Time  will tell as I have not taken a passenger up yet. 

  

 I also had to change out my Kunztleman  HotBox and EIS and I am very happy with them.

  

 I want to thank Brian and Travis at TNK for all the  advice and time they spent on the phone with me during the conversion and  certainly John Hauck for going out of his way to remove and deliver the engine  to me in a timely manner so I could get back in the air.

  

 Jim Ballenger

 MK III X 912ULS

 N46319

 Virginia Beach, Virginia

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Denny Rowe

Joined: 10 Jan 2006
Posts: 89
Location: Leechburg, PA

Posted: Wed Oct 25, 2006 4:31 pm Post subject: MK III X 582 TO 912ULS CONVERSION

Jim,

 Congrats on your new powerplant.

 Thanks for the info, sounds like you have many  hours of fun and dependable flying ahead of you.

 Keep us posted on your adventures.

  

 Denny

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Cat36Fly(at)aol.com
Guest

Posted: Thu Oct 26, 2006 12:22 pm Post subject: MK III X 582 TO 912ULS CONVERSION

Jim;

  

 I'm very happy to see you back in the air. However, go easy with those new  performance numbers as some of us are still using the 582. Actually, I'm green  with envy. 

  

 Fly Safe 

 Larry Tasker

  

 Any feel yet for how long your legs are going to be now? Should use less  fuel and as I recall you have 20 gal.

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Jim Ballenger

Joined: 12 Jan 2006
Posts: 18
Location: Virginia Beach, Virginia

Posted: Thu Oct 26, 2006 1:03 pm Post subject: MK III X 582 TO 912ULS CONVERSION

Larry

  

 It is good to be back in the air.  Last Sunday was an  overcast morning and no wind.  A great day to test what the plane and  engine could do.  I set the engine at 5000 rpm and it just flew as level as  any plane I've flown including the spam cans.  Of course it would only fly  a few seconds without any corrections, it wants to roll very slightly to the  left but I felt very comfortable.  The plane and engine are a great  combination.

  

 I really don't know how long I will fly between pit stops but  I'm thinking around two hours at fuel flow of 5.25 gph.  I'm not sure the  old body or bladder will take much more than that.  You're right I have 20  gallons on board.

  

 Jim

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