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not Kolb related but fascinating

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Thom Riddle

Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)

Posted: Sat Feb 27, 2010 12:20 pm Post subject: not Kolb related but fascinating

If you don't want to see something NOT KOLB RELATED hit the delete key now. 



BUT if you are not immune to the attraction of other things that fly, you might find this video worth your while. The audio is German but the important points are captioned in English.



http://vimeo.com/6194911



do not archive

_________________
Thom Riddle
Buffalo, NY (9G0)

Don't worry about old age... it doesn't last very long.
- Anonymous

Ralph B

Joined: 14 Apr 2007
Posts: 367
Location: Mound Minnesota

Posted: Mon Mar 01, 2010 6:47 am Post subject: Re: not Kolb related but fascinating

This is got to be one of the coolest things I've seen in a long time ...



(click on the link in Thom's post above)



do not archive



Ralph

_________________
Ralph B

Kolb Kolbra 912uls
N20386
550 hours

Last edited by Ralph B on Mon Mar 01, 2010 7:13 am; edited 2 times in total

russkinne(at)mac.com
Guest

Posted: Mon Mar 01, 2010 7:03 am Post subject: not Kolb related but fascinating

What is?  No image or link came thru

On Mar 1, 2010, at 9:47 AM, Ralph B wrote:



 	  Quote: 	
		   



 This is got to be one of the coolest things I've seen in a long  

 time ...



 Ralph



 --------

 Ralph B

 Original Firestar 447

 N91493 E-AB

 1000 hours

 23 years flying it

 Kolbra 912UL

 N20386

 2 years flying it

 120 hrs





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=288730#288730

Thom Riddle

Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)

Posted: Mon Mar 01, 2010 7:10 am Post subject: Re: not Kolb related but fascinating

Russ,



This....

http://vimeo.com/6194911



do not archive

_________________
Thom Riddle
Buffalo, NY (9G0)

Don't worry about old age... it doesn't last very long.
- Anonymous

Last edited by Thom Riddle on Mon Mar 01, 2010 7:30 am; edited 1 time in total

mdnanwelch7(at)hotmail.co
Guest

Posted: Mon Mar 01, 2010 7:17 am Post subject: not Kolb related but fascinating

> This is got to be one of the coolest things I've seen in a long time ...

 	  Quote: 	
		   

 Ralph

  
	


 Yeah, Ralph, that's what I thought, too.  Thom says you may be able to buy a kit from the guy that built it.  I wouldn't think it is very cheap, though.  But, still.....it is a nice toy,  and we all need more toys!!

  

 Kolb guys in general,

  

   I have a question regarding flaps on a MkIII.  For those of you with flaps on your plane, you know I'm reinstalling my wings, tailfeathers, etc, now that the Poly Fiber/paint is finished.

  

   I just got the flaps and ailerons rehung this last weekend.  I notived that if you stand behind the flap(s), you can get a fair amount of "reflex" by pushing them up.  I assume that with a load on the wings, the flaps will flex upward, unless you preset them slightly lower.

  

   So, here's my question for you guys that have flaps on your Kolb planes;  are your flaps adjusted slightly low, to account for upward flexing, or do you not worry about it, and just set them flat with the underside of the wing, even though they will flex up while in flight?

  

 Thanks,   Mike Welch



 		 	   		  Hotmail: Powerful Free email with security by Microsoft. Get it now.  [quote][b]

John Hauck

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

Posted: Mon Mar 01, 2010 7:38 am Post subject: not Kolb related but fascinating

Just the opposite, Mike W.

  

 Air coming over the top of the wing pushes down on  the flaps when they are in the neutral position.  If you kick the flap  handle out of the detent, while in flight, the flaps will fly about half way  between neutral and 20% (middle flap position), maybe less.

  

 john hauck

 mkIII

 Titus, Alabama

 [quote]     I assume that with a load on the    wings, the flaps will flex upward, unless you preset them slightly    lower.

 

  

Thanks,   Mike Welch

 

[b]

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

clrprop

Joined: 16 Sep 2008
Posts: 44
Location: SC

Posted: Mon Mar 01, 2010 7:46 am Post subject: Re: not Kolb related but fascinating

re: the hexacopter

A friend in my rc club has met the guy and says it costs $1800.00



p.s. The scale model of my MarkIII is almost finished. 



Keath T

S.C.

brett(at)xtc-paragliding.
Guest

Posted: Mon Mar 01, 2010 9:58 am Post subject: not Kolb related but fascinating

You are going to have to explain that to me. I understood we had high pressure 'under' the wing and low 'above' the wing, so I can't see how the flaps would be pushed down. I can understand staying neutral with the airflow or the weight of the flap pulling it down as they have no balance weight, but not being pushed down by the airflow surely???

 

 Brett

 MkIIIc

 

 

 On 01/03/2010 16:31, John Hauck wrote: [quote]      .hmmessage P { 	PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-TOP: 0px } BODY.hmmessage { 	FONT-SIZE: 10pt; FONT-FAMILY: Verdana }         Just the opposite, Mike W.

    

   Air coming over the top of the wing pushes down on the flaps when they are in the neutral position.  If you kick the flap handle out of the detent, while in flight, the flaps will fly about half way between neutral and 20% (middle flap position), maybe less.

    

   john hauck

   mkIII

   Titus, Alabama

   

 [b]

John Hauck

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

Posted: Mon Mar 01, 2010 10:51 am Post subject: not Kolb related but fascinating

Have no explanation other than that is the way it  is.

  

 john hauck

 mkIII

 Titus, Alabama

  

  

 [quote]    You are going to have to explain that to    me. I understood we had high pressure 'under' the wing and low 'above' the    wing, so I can't see how the flaps would be pushed down. I can understand    staying neutral with the airflow or the weight of the flap pulling it down as    they have no balance weight, but not being pushed down by the airflow    surely???



Brett

MkIIIc

On 01/03/2010 16:31, John Hauck    wrote: 

    	  Quote: 	
		       .hmmessage P { 	PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-TOP: 0px } BODY.hmmessage { 	FONT-SIZE: 10pt; FONT-FAMILY: Verdana }            Just the opposite, Mike W.

      

     Air coming over the top of the wing pushes down      on the flaps when they are in the neutral position.  If you kick the      flap handle out of the detent, while in flight, the flaps will fly about      half way between neutral and 20% (middle flap position), maybe      less.

      

     john hauck

     mkIII

     Titus, Alabama

 	
[b]

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

rmurrill(at)cox.net
Guest

Posted: Mon Mar 01, 2010 10:51 am Post subject: not Kolb related but fascinating

Kutta condition from many may years ago in my Aero  1 class claimed...Pressure distribution on most conventional camber airfoils  actually is downward near the trailing edge at positive angles of attack.   Would expect to free float downwards a few degrees even without the weight  moment best I can remember... 

 [quote]   ---

russkinne(at)mac.com
Guest

Posted: Mon Mar 01, 2010 10:55 am Post subject: not Kolb related but fascinating

Thanx Thom



On Mar 1, 2010, at 10:10 AM, Thom Riddle wrote:



 	  Quote: 	
		   



 Russ,



 This....

 http://vimeo.com/6194911



 --------

 Thom Riddle

 Buffalo, NY

 Kolb Slingshot SS-021

 Jabiru 2200A #1574

 Tennessee Prop 64x32

 An ounce of action is worth a ton of theory.

   - Friedrich Engels





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=288737#288737

ceengland(at)bellsouth.ne
Guest

Posted: Mon Mar 01, 2010 11:44 am Post subject: not Kolb related but fascinating

If you can find one of those computer-generated color charts showing 

pressure distribution over an a/c, you'll see what John describes. If 

you can find a Thorp T-18 driver, you can see it in action. The canopy 

on a low wing plane is an airfoil, too. The fresh air *intake* on a 

Thorp is at the lower back edge of the sliding canopy. The breeze coming 

forward is so strong, it will part the hair on the back of your head.



Charlie



On 3/1/2010 12:50 PM, Bob wrote:

[quote] Kutta condition from many may years ago in my Aero 1 class 

 claimed...Pressure distribution on most conventional camber airfoils 

 actually is downward near the trailing edge at positive angles of 

 attack.  Would expect to free float downwards a few degrees even 

 without the weight moment best I can remember...



     ---

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