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Kolb Slingshot
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Ralph B

Joined: 14 Apr 2007
Posts: 367
Location: Mound Minnesota

Posted: Fri Feb 08, 2013 4:51 pm Post subject: Re: Kolb Slingshot

kuffel(at)cyberport.net  	  Quote: 	
		  

Of course, if the work constitutes a "major  alteration" it should be logged by whoever did the work along with the FSDO  testing requirements and completion of those requirements.  But what is a "major alteration" is an entirely different issue.  

  

 Tom Kuffel 	




I replaced the Kolbra engine, prop, and avionics after they were stolen and this was considered a "major alteration". The FAA came out and inspected and assigned a new test area to fly off 10 hours. This was done last spring and it's been flying ever since. Since I fly during the winter months, I tape off the front side of the radiator and both sides of the oil cooler when the OAT is below freezing. By doing this, the CHT's remain under 200 deg. As the weather starts warming, I will have to remove some tape to maintain normal CHT's.



Ralph B

_________________
Ralph B

Kolb Kolbra 912uls
N20386
550 hours

Rpayne

Joined: 22 Aug 2011
Posts: 2
Location: Apalachin, NY

Posted: Sat Feb 09, 2013 6:29 am Post subject: Kolb Slingshot

Another way to go for you guys with Mark  3s. Take a look at Rotax Ricks 670 engine. I traded in my 582 for one and  put it on my Xtra. It puts out 89hp and gets about 1 gph better fuel burn.  Basically performs like a 912 on a 582 budget. This is my first yr with it so  not alot of time but I put 60 hrs on it this yr and it was flawless. Make the 2  place alot more fun to fly when you have the extra power.

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John Hauck

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

Posted: Sat Feb 09, 2013 7:01 am Post subject: Kolb Slingshot

 

 Another way to go for you guys with Mark 3s. Take a look at Rotax Ricks 670 engine. I traded in my 582 for one and put it on my Xtra. It puts out 89hp and gets about 1 gph better fuel burn. Basically performs like a 912 on a 582 budget. This is my first yr with it so not alot of time but I put 60 hrs on it this yr and it was flawless. Make the 2 place alot more fun to fly when you have the extra power. 

 

 

 

Hopefully, your 670 will prove to be as reliable as a 912 series engine.

 

john h

mkIII

Titus, Alabama



  [quote][b]

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

herbgh(at)nctc.com
Guest

Posted: Sat Feb 09, 2013 7:19 am Post subject: Kolb Slingshot

On 02/09/2013 08:29 AM, Rodney Payne       wrote:

     

      	  Quote: 	
		                               Another way to go for you guys           with Mark 3s. Take a look at Rotax Ricks 670 engine. I traded           in my 582 for one and put it on my Xtra. It puts out 89hp and           gets about 1 gph better fuel burn. Basically performs like a           912 on a 582 budget. This is my first yr with it so not alot           of time but I put 60 hrs on it this yr and it was flawless.           Make the 2 place alot more fun to fly when you have the extra           power. 

       

     	
       Good looking bird....

     

       wondering why the fuel burn is less than the 582? fuel      Injection...running at lower rpm's?  Herb 

      [quote][b]

John Hauck

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

Posted: Sat Feb 09, 2013 7:28 am Post subject: Kolb Slingshot

   wondering why the fuel burn is less than the 582? fuel  Injection...running at lower rpm's?  Herb  	  Quote: 	
		     Fuel burn from one aircraft/engine/pilot to another is not consistent and comparisons are not accurate. For my own personal use, I have found that the only way to get accurate fuel burn is during long cross country flights where the throttle is set at cruise rpm and left there.  The flight should be started with a full tank and topped off on landing. I get great fuel burn when I am flying local and playing around the airport.  A lot of people figure their fuel burn on this type flying.  Then, during their first serious cross country flight, they are shocked that there engine is burning so much fuel. john h 	
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama

alienwes

Joined: 11 Dec 2012
Posts: 64
Location: Roswell, NM

Posted: Sat Feb 09, 2013 7:43 am Post subject: Re: Kolb Slingshot

From what I have been told, the Rotax Rick uses alot of the same parts as a 582 but also has RAVE valves. The max RPM is 7000 and this is where the extra HP comes from. You basically send him your 582 when it needs a rebuild and he turns it into a Rotax Rick 670. What he is doing is common on snowmobiles so he is really just applying it for out use. I have thought of doing it on my PPC with a 582 but would like to transition to a fixed wing 912 Kolb eventually. I will search another forum where Rick put out some good info.

_________________
Wesley Elliott
Sport Pilot-PPC

alienwes

Joined: 11 Dec 2012
Posts: 64
Location: Roswell, NM

Posted: Sat Feb 09, 2013 7:50 am Post subject: Re: Kolb Slingshot

From Rotax Rick,



 	  Quote: 	
		  Just so everyone knows a 618 with a 582 exhaust makes only 65 hp. The above 670 was using a 582 exhaust & made 75 hp. The 618 that I sent had no 618 exhaust with it. ( They were impossible to find, that is why I now build 4 different styles of that exhaust myself ) My current exhaust will fit the 618 above and give it the 75 hp it can produce. Here is how it works, send me your runout 582 ( or what evrer condition it's in) The O/H cost is $1650 Add $1500 to that and instead I send you a 670 back. I use your head, carburetors , Ducati Dual ignition & RV shaft. I install the BH ceramic water pump seal,Redo the 670 crank with $480 in parts,new spark plugs,wires boots, Jet the carbs,new carb boots, surface the cylinders & head,make a new coil mount plate,install your RV bottle, your starter and gearbox, The C/E gearbox flywheel is machined to fit the 670 crank. I can do the clutch as well. new pistons ,all new seals & gaskets, open the crank oil feed holes, ETC. The 582 prop will work, You will get 700 rpm more. The 670 redline is 7000 rpm, the same Rotax put on the 618,So just 1 to 2 deg's is fine,EP Dalton runs one now. He use to get 6400 rpm on takeoff, Now he gets 7100 rpm. Doing his 1 hour ride using the same rpm's as the 582 ran he burns 3.5 GPH instead of 5 GPH He runs it at 5600 rpm with floats on a Quicksilver Sprint and he's 235 lbs. 



I did forget to bring up one very important thing, Why did the 670 fail in aircraft years ago ??? They would buy the 93/94 engine, put a 100 hp pipe on it and run it like it came, When I did my first 670 crankshaft I found the reason, The 93/94 670's used the exact same bearing as the early 582's, the 583 snowmobile and the 580 Sea Doo,. That bearing failed in the 582 aircraft engines and failed in the 580 Sea Doo, The 583 did not have the problem because there so fast you can run them wide open for a long time. Rotax put a bigger bearing in the 95 aircraft modle, (and that is still the cause of every 2 out 3 582 engine failures) The aftermark guys double slotted the Sea Doo rods to get more oil to the bearing and that worked. Thats why I say all 582,618's and 670 engines need 40 to 1 oil ratio. Those bearings will fail sooner or latter without it. Here is what I do that makes the 670 work now, In the 98 /99 year high output models ( 132 HP ) they increased the top and bottom eye's and used the same size crank pin & wrist pin, they filled the gap with much larger roller bearings . These are the rods we now use since Jan 2010 and we use double slotted rods to get more oil to the bearing. 

Call me for more help & info . I will tell you what to do if you want to build your own. I want to keep things safe and not rune the 670 name, It is the very best 2 cycle engine out there. (239) 572-

_________________
Wesley Elliott
Sport Pilot-PPC

Thom Riddle

Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)

Posted: Sat Feb 09, 2013 11:58 am Post subject: Re: Kolb Slingshot

...Then, during their first serious cross country flight, they are shocked that there engine is burning so much fuel. john h...



Ain't that the truth. I have a friend who flies a Sonex. After making many flights of generally 1.5 hour duration or less, he figured his fuel consumption at 3.75 gph. Then he flew on a long x-country and landed off-field about 10 miles before his destination 'cuz he ran out of fuel. He figured he had at least 45 minutes fuel remaining at his destination, which he didn't quite make.



do not archive

_________________
Thom Riddle
Buffalo, NY (9G0)

Don't worry about old age... it doesn't last very long.
- Anonymous

herbgh(at)nctc.com
Guest

Posted: Sun Feb 17, 2013 4:53 pm Post subject: Kolb Slingshot

Kolb Slingshot sn005 is home and safely covered and in the barn...



   John; it was in Wetumpka at one time...maybe second owner...remember 

it?   Herb

John Hauck

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

Posted: Sun Feb 17, 2013 5:20 pm Post subject: Kolb Slingshot

John; it was in Wetumpka at one time...maybe second owner...remember 

it?   Herb

 

Yes, the SS was owned by a friend of mine.  Powered with a 582.  I flew the

SS.



Next time I saw it, after it left Wetumpka, was at a Kolb Homecoming several

years ago.



john h

mkIII

Titus, Alabama

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

herbgh(at)nctc.com
Guest

Posted: Sun Feb 17, 2013 5:27 pm Post subject: Kolb Slingshot

I think the guy that I bought it from flew it to the home coming...



   It has been passed around...but I do not see that it has been damaged 

.  Nor do I see poor construction...



   4 or 5 owners in 15 years...  not a good sign sometimes...but I 

surely do not see any flaws...  Herb

On 02/17/2013 07:20 PM, John Hauck wrote:

 	  Quote: 	
		   



   



     John; it was in Wetumpka at one time...maybe second owner...remember

 it?   Herb

   

 Yes, the SS was owned by a friend of mine.  Powered with a 582.  I flew the

 SS.



 Next time I saw it, after it left Wetumpka, was at a Kolb Homecoming several

 years ago.



 john h

 mkIII

 Titus, Alabama

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