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Kiev Prop update

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Dick Maddux

Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl

Posted: Sat Jan 23, 2010 8:43 am Post subject: Kiev Prop update

Well, this is the last you will hear from me on this subject so I will quit boring you.

 Yesterday was a golden day for flying. Temp was 70 degrees with 5 knots of wind down the runway (today is dog do do)

 I did all my test flying on this prop. (6 hrs worth..prop on/off, change pitch,etc)) Here are the numbers:

  

   KIEV PROP:

      (1)  12 degrees pitch/4800 static/95-100 (at)5000 rpm/5500 full throttle

      (2)   11 degrees pitch/5000 static/ 90(at)5000rpm/5800 ([email]90(at)5000rpm/5800[/email]) full throttle

      (3)  10 degrees pitch/5200 static/80(at)5000 ([email]static/80(at)5000[/email]) rpm/ would have exceeded 5800 at full 

    Notes:

      (1)   Prop was much smoother running than the Warp, engine cooling seemed to be greater ( cht and oil temps),power on approach was 2800 to maintain 55 mph approach speed vs 1800 rpm on the Warp. Prop acted as a "flat plate". If pulled to idle the aircraft would come down much faster (not necessarily a bad thing..like going to full increase on a constant speed prop)

      (2) prop pitch angles were based on the prop angle adjusting tool marks not actual prop pitch angles 

      WARP PROP:

         (1) 5200 static-5400 down the runway/88-90 (at)5000rpm/5700 full throttle

  

      CONCLUSION:

     I really liked the beauty of the Kiev prop, but you just can't stand around and look at it. I loved its smooth running (like a turbine). The static rpm was way too low to achieve a meaningful speed increase for this prop. 5200 is the minimum per Rotax instruction.

   I have gone back to my "butt ugly" Warp (as one guy called it).The prop is well built and I like the prop to flange attachment much better than the Kiev arrangement. The HP hub uses prop bushings on the outer holes for  better stability I think.(LYC/Cont style)

  As a side note I did sell the Kiev within 1 hour of me telling a guy at the Sebring Light Sport expo I did not want it. They are pretty backed up on orders at Kiev.

   Oh Well !!! ... I sure wish it would have worked !!!!

                                            Dick Maddux

                                            Fox 4

                                            912UL

                                            Milton,Fl   

  [quote][b]

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dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Sat Jan 23, 2010 9:41 am Post subject: Kiev Prop update

Dick, 

  

  

 Great report on the Kiev although disappointing.

  

 I would suggest IVO if you want more speed.IVo do look flimsy but they do  work well. 

  

 I run mostly WARP as for seaplane it near indestructable although it  heavier.

  

 Dave

  

  

  

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propellerdesign(at)tele2.
Guest

Posted: Sat Jan 23, 2010 1:03 pm Post subject: Kiev Prop update

There is some test of different props on

 http://www.stolspeed.com/id/62?secondary_id=

  

 Pic seems to be gone, but text is there.

 it say about the same as your short test, not a big difference in cruise  speed but in static rpm.

  

 Bolly seems to be a snap better.

  

 Jan

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