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VG update

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smlplanet(at)msn.com
Guest

Posted: Sat Sep 27, 2008 6:16 am Post subject: VG update

After reading the numbers on the different VG  installations I decided it give them a try. Mark III/912...594  lbs empty...no flaps installed.

 10 gas in main fuel tanks and 3 gals in  reserve nose tank for test flights. total of 13 gals. 

 W/O VG's 175 lbs pilot stall 44 asi ....W VG'S 36 asi power on

 W/O VG'S 375 lbs duel stall 50 asi.... W VG'S 40  asi power on

 31 VG'S total installed on wings 10 back from  leading edge and set between every other rib plus 3 on the wing gap  seal

 It also increased the rate of climb 200 to 400  fpm. Ground roll smoother and shorter and landings much better and just  wants to float in ground affect, very soft landings. There maybe a 1-2 mph lose  on cruise and all testing was done in calm air

 Worth the $35 including shipping off  e-bay

  



  From: VICTOR PETERS (vicsv(at)verizon.net) 

 Sent: 2008-08-11 10:31

 To: Kolb list (kolb-list(at)matronics.com) 

 Subject: VG update

 



 Since everyon is posting #'s

 1.1 hrs legal instruction MKIII xtra 912ul 590lbs  empty

 132 vg's on wing tip to tip including gap  seal

 Parallel on vertical stab 2"  apart

 200lb pilot, calm air, 75 deg.  

 Power off stall 37 ias 35  flaps

 39 ias power on

 100 ias WOT (5600 rpm) 400lbs of  pilot and passenger, full fuel(10 gals)

 Stall with 2, 45 ias power  off

  

 No more yank to left with power eased up on  takeoff.

 Pre vg's needed a little right rudder in level flight.

 Now, slight to no left rudder needed. I'm just guessing but vgs must be  helping

 trim tab work.

 Landed 60 mph over the fence, forgot to look at touchdown.

 It was so smooth that if the tires hadn't chirped you would'nt know you had  landed.

 So Ellery you don't have to dive at the  runway.

 Especially with a mile of asphalt, not to be confused with ass fault, thats  just a crack.

  

 Tickled in Maine

 Vic

 N740VP

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JetPilot

Joined: 10 Jan 2006
Posts: 1246

Posted: Mon Sep 29, 2008 8:26 am Post subject: Re: VG update

Thats great to hear Vic !!!   This is exactly the reason that I went to the trouble of making the VG videos and posting the information on this list, I am happy I could contribute and help out some fellow Kolb flyers.  There have been a number of other people that have also installed VG's on their Kolbs with positive results, but they have chosen to email me in private to thank me.  Its a shame that some people have created such a hostile environment here that people are afraid to post information about their Kolbs on this list, but I respect their wishes.  



35 dollars is a great deal for VG's, I am wondering if they are about the same size and shape as the ones I have used ?  What are they made out of ?   I paid 100 dollars for 100 VG, but still the best 100 bucks I have spent on the Kolb     Can you post a link to where you got the VG's on ebay ?



Thanks,

Mike

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"NO FEAR" - If you have no fear you did not go as fast as you could have !!!

Kolb MK-III Xtra, 912-S

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