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Nose cone for MKIIIC....reason

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apilot(at)surewest.net
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Posted: Wed Aug 19, 2009 4:13 pm Post subject: Nose cone for MKIIIC....reason

The reason that a flatter bottom surface on the nose cone is better for speed and economy is because the bottom surface surfs at cruise speed.  The wider it is, the better it surfs and the induced drag created by the horizontal stab and elevator to hold the nose up is reduced due to the uplift force on the nose.  Parasite or profile drag is usually less than induced drag.  There is a limit to the benefit of fuselage strakes or flat bottom nose cones, but I do not know what it is.           Vic Gibson (Mk III Classic)

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John Hauck

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

Posted: Wed Aug 19, 2009 4:36 pm Post subject: Nose cone for MKIIIC....reason

> The reason that a flatter bottom surface on the nose cone is better for 

speed and economy is because the bottom surface surfs at cruise speed.



   Vic Gibson (Mk III Classic)

What about the top of the big flat nose?



john h

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

aslsa.rng(at)gmail.com
Guest

Posted: Wed Aug 19, 2009 6:12 pm Post subject: Nose cone for MKIIIC....reason

Just a guess here, guys, since more surface area is more skin drag, but might the improvement have more to do with improving the air flow into the prop?



Rick Girard

do not archive



 On Wed, Aug 19, 2009 at 7:35 PM, John Hauck <jhauck(at)elmore.rr.com (jhauck(at)elmore.rr.com)> wrote:

[quote] --> Kolb-List message posted by: "John Hauck" <jhauck(at)elmore.rr.com (jhauck(at)elmore.rr.com)>

 

 

 > The reason that a flatter bottom surface on the nose cone is better for speed and economy is because the bottom surface surfs at cruise speed.

 



   Vic Gibson (Mk III Classic)

 

 



 What about the top of the big flat nose?

 

 john h 



 

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John Hauck

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

Posted: Wed Aug 19, 2009 6:38 pm Post subject: Nose cone for MKIIIC....reason

I prefer flying my original MKIII over any of the  MKIIIx's.

  

 john h

 mkIII

  

  

 [quote]    

Just a guess here, guys, since more    surface area is more skin drag, but might the improvement have more to do with    improving the air flow into the prop?   



   Rick Girard

    

[b]

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

JetPilot

Joined: 10 Jan 2006
Posts: 1246

Posted: Fri Aug 21, 2009 9:23 am Post subject: Re: Nose cone for MKIIIC....reason

John H has a higher cruise speed than my MK III Xtra.  I also seem to get much more pitch down from my big flat front window and need a lot more up elevator to counteract it.  Given what I have seen, I think the MK III Classic is faster with less drag.  But I still love my wide cockpit and huge windows 



Mike

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