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Possums
Joined: 03 Nov 2007
Posts: 247
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 Posted: Thu Aug 07, 2008 5:12 pm Post subject: VG Performance Video: Stalls, Slow Flight, Turns, Landing |
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At 08:01 PM 8/7/2008, you wrote:
| Quote: | I have been reading the comments on the VG's pro & con but I haven't
heard any thing as to fuel usage. Have you noticed any differance as
to gallons per hour at curise speeds. Right now on my M III/ul912 in
calm air I run 65-70 mph at 3700 rpm 80 mph at 4000-4200 rpm with
out any VG's. I am hoping to fly up to the Kolb fly-in ( approx 800
mi ) in Sept. and looking to cut fuel intake and more air time
between pit stops.
Where is that video I hear them talking about with the VG's?
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Here's you some from "LandShorter"
http://www.landshorter.com/page10.html
I don't think it would affect fuel usage at all, only performance at
low speeds.
They will not (in theory) affect your cruise speed - if placed properly.
I would send you some of me flying at 25 mph in my 400+ pound
one-seat 27 ft. wing semi-kolb knock-off (see ....I've had kolbs
before, so I can
still make comments on the list). Jerk it around, yank it up & down
all at stall speed.
But I erased them from YouTube and I'm sure you don't want to download
a 16 MB file.
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Possum |
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JetPilot
Joined: 10 Jan 2006
Posts: 1246
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| Posted: Thu Aug 07, 2008 6:23 pm Post subject: Re: VG Performance Video: Stalls, Slow Flight, Turns, Lan |
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Possums,
What airplane are you flying now ? Which engine does it have ? How does it compare to the Kolb ?
Smlplanet(at)msn.com
Those are very good numbers for cruise in the MK III Classic ! Like Possums says, the VG's wont help you any at cruise, they are for imporving slow speed handling and reducing stall speed. The VG video I shot in my MK III Xtra is at:
http://www.vimeo.com/1480667
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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smlplanet(at)msn.com
Guest
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| Posted: Fri Aug 08, 2008 1:24 am Post subject: VG Performance Video: Stalls, Slow Flight, Turns, Landing |
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Hi and thanks for the intrest and info. I have a Kolb Mak III / UL912 that I am thinking about putting the VG's on.
I'm the back 40 type flier type with the large tires and steel landing gear. I'm working on a larger alum fuel tank so I can take longer XC flights with out so many fuel stops. I also have a challenger cws II that I put the drooped wing tip on and made big differance for the better. After pricing Kolbs drooped wing tips I am going to pull a mold off the challenger and fit to the kolb wings. If they work as well on the kolb as the challenger that will will be great. I'm also looking for a pair of floats with retractable gear if possible C flying over the everglades and gulf of mexico will make me feel a little better.
I just wish the kolb had a higher VNE. I picked up a bug in the ASI tube one day and didn't know what speed I was running at. I found some calm air and the GPS said I was doing 130mph. Normally I can tell by the rpm but had 10-15mph wind and guest up to 30mph so the rpm didn't do much good.
Your plane looks great. What are the air scoops on the sides for or just looks?
Got rid of new wife and now I can spend monies on my toys again C besides toys are cheaper than a wife to maintain.
| Quote: | Date: Thu C 7 Aug 2008 23:04:02 -0400
To: kolb-list(at)matronics.com
From: possums(at)bellsouth.net
Subject: Re: Re: VG Performance Video: Stalls C Slow Flight C Turns C Landing
At 10:23 PM 8/7/2008 C you wrote:
>--> Kolb-List message posted by: "JetPilot" <orcabonita(at)hotmail.com>
>
>Possums C
>
>What airplane are you flying now ? Which engine does it have
>? How does it compare to the Kolb ?
I wrecked my 447 Firestar back in '97 after 600 hrs. So I had the
chance to rebuild it like I wanted.
Same wing ribs you've got - just more of them ( per wing C 4 inch
wider cockpit C shorter wings C different wing tips etc.
503 CDI C saved the nosecone & the stick & some hardware. It's heavier C but the
VGs more than make up for that. It's basically a kolb except for the back end.
I like it better without the windshield when it hot. But it will
glide like a poor performance sailplane.
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[quote][b]
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icrashrc
Joined: 16 Mar 2006
Posts: 247
Location: Mishawaka, In
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| Posted: Fri Aug 08, 2008 1:45 am Post subject: Re: VG Performance Video: Stalls, Slow Flight, Turns, Lan |
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[/quote]
Here's you some from "LandShorter"
http://www.landshorter.com/page10.html
I don't think it would affect fuel usage at all, only performance at
low speeds.
They will not (in theory) affect your cruise speed - if placed properly.
I would send you some of me flying at 25 mph in my 400+ pound
one-seat 27 ft. wing semi-kolb knock-off (see ....I've had kolbs
before, so I can
still make comments on the list). Jerk it around, yank it up & down
all at stall speed.
But I erased them from YouTube and I'm sure you don't want to download
a 16 MB file.[/quote]
If you want to email me the file i'll be happy to make it a more reasonable size[but higher quality than youtube] and host it on my site for a while. icrashrc at aol dot com
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Scott
www.ill-EagleAviation.com
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Possums
Joined: 03 Nov 2007
Posts: 247
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| Posted: Sun Aug 10, 2008 4:36 pm Post subject: VG Performance Video: Stalls, Slow Flight, Turns, Landing |
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Who's done a spin in a Kolb? I know how to do one but.
How does it feel - I don't think I would like the semi upside down
feeling....but should be no G problem.
John H.......? When you were younger & dumber? How did it feel?
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Possum |
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Sun Aug 10, 2008 5:21 pm Post subject: VG Performance Video: Stalls, Slow Flight, Turns, Landing |
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> Who's done a spin in a Kolb? I know how to do one but.
| Quote: | How does it feel - I don't think I would like the semi upside down
feeling....but should be no G problem.
John H.......? When you were younger & dumber? How did it feel?
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Possum:
Kolbs spin. Some better than others.
Feels like a spin, very vertical, almost like a spiral.
Immediate recovery.
However, with Fergy wings and differently configured fuselage, I don't know
how your aircraft will react.
john h
mkIII
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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