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HKS Kolb Twinstar

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robcannon

Joined: 22 Jun 2008
Posts: 39
Location: British Columbia

Posted: Thu Oct 02, 2008 4:46 pm Post subject: HKS Kolb Twinstar

I flew my Twinstar this week for the first time .  I spent last winter installing an hks engine, building a new fuel tank, wiring etc.  

    The twinstar / hks combo seems good so far.  I have spent alot of time to get cht/egt/prop pitch all where they should be, and I am almost done.  Looks like I will end up with around 1000'/min. climb, and gobs of cruise power(solo)  In level flight when I add full power it very quickly will exceed vne.  It is the 3:47 gearbox ,  66" four blade "F" model powerfin set at 12.5 degrees at the tip.

   cheers, Rob

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slyck(at)frontiernet.net
Guest

Posted: Thu Oct 02, 2008 5:15 pm Post subject: HKS Kolb Twinstar

Here's an attaboy for the positive report.  Let us know where you are  

located.

BB

do not archive



On 2, Oct 2008, at 8:46 PM, robcannon wrote:



 	  Quote: 	
		   



 I flew my Twinstar this week for the first time .  I spent last  

 winter installing an hks engine, building a new fuel tank, wiring etc.

     The twinstar / hks combo seems good so far.  I have spent alot  

 of time to get cht/egt/prop pitch all where they should be, and I  

 am almost done.  Looks like I will end up with around 1000'/min.  

 climb, and gobs of cruise power(solo)  In level flight when I add  

 full power it very quickly will exceed vne.  It is the 3:47  

 gearbox ,  66" four blade "F" model powerfin set at 12.5 degrees at  

 the tip.

    cheers, Rob





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 http://forums.matronics.com/viewtopic.php?p 7200#207200

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ropermike

Joined: 28 Aug 2006
Posts: 40
Location: West Texas, South Mississippi

Posted: Thu Oct 02, 2008 6:10 pm Post subject: Re: HKS Kolb Twinstar

Rob, I have a Twinstar MkII. What was the HKS weight? What was on your plane before the HKS and how does the HKS compare? Did you need to modify your airframe much? I have a 503 and have often dreamed of having a 4-stroke. Thanks in advance!.........Mike

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Dave Bigelow

Joined: 29 Jan 2006
Posts: 103
Location: Kamuela, Hawaii

Posted: Fri Oct 03, 2008 12:34 am Post subject: Re: HKS Kolb Twinstar

Rob,



Congratulations on the completion of your HKS project.  I'm coming up on a year's flying with my HKS powered Firestar II, and have had zero problems.  It just works - smooth reliable power on demand, plus low fuel consumption.



How about some pictures?

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Dave Bigelow
Kamuela, Hawaii
FS2, HKS 700E

robcannon

Joined: 22 Jun 2008
Posts: 39
Location: British Columbia

Posted: Fri Oct 03, 2008 7:02 am Post subject: Re: HKS Kolb Twinstar

Rats !  I just wrote a long response(very slow typer) and added a couple pics. I went to preview it, and when I pressed the back arrow it was gone. grrrrrrr. I fly in coastal British Coumbia ( read BIG TREES everywhere), so  I feel I need a four stroke.  I like the 503, and if I flew somewhere more forgiving I would be happy with it.  There are really no airframe mods to be done, you just make an aluminum adapter plate.

  There are alot of decisions to be made along the way( you dont just bolt it on) (C of G, thrust line, gearbox, electical location, etc.) If you're a mechanically inclined (as opposed to "mechanically declined") idividual it is not that hard. 

  The finished package (fairing, instruments, brs, custom 12 gal tank, alum leading edge wrap wing, etc.)  weighs 465 lbs. The gross is 750. Twinstars in the past have been flown waayyy over gross. A guy named Rick Trader flew a twinstar to Alaska and back loaded between 1000 and 1110 lbs !!!   I will fly my plane for a year or so, before I even consider taking a passenger. At that point I will load it up heavy, and go high, with a couple chutes, and beat it up a bit. If it survives that I MIGHT take a light passenger on a still air evening.    cheers, Rob

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ropermike

Joined: 28 Aug 2006
Posts: 40
Location: West Texas, South Mississippi

Posted: Sat Oct 04, 2008 5:20 pm Post subject: Re: HKS Kolb Twinstar

Thanks Rob, please keep us posted!.......My Twinstar ll weighs in at 420 lbs with a 503. I was wondering what the weight difference would be for an even swap with the hks. My 503 will fly my brother and I (both at 200 lbs) with 5 gal fuel at 2700' msl fairley good but i would not go with 6 gal fuel!

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Mnflyer

Joined: 15 May 2006
Posts: 78

Posted: Sun Oct 05, 2008 1:38 pm Post subject: Re: HKS Kolb Twinstar

Hi Rob, congrats on getting your plane flying with the HKS, your going to like the engine, I converted my Kitfox about 2.5 yrs ago and now have 295 hrs and am very pleased with all aspects of the engine. It runs smooth need only oil & filter changes, spark plugs at 200+ hrs but do comply with the Service Bulletin on checking the carb flanges.



PS when converting from the 582 to the HKS the weight difference was 5 lbs more for the HKS, I now fly with 6 less gals of gas as I never need the wing tank any more so I feel I gain 25 lbs of useful load.

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GB
MNFlyer
Flying a HKS Kitfox III

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