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Required structural modification needed

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Jean Pillaudin

Joined: 30 Oct 2008
Posts: 26
Location: France

Posted: Thu Oct 30, 2008 1:02 am Post subject: Required structural modification needed

Hi all,



I am new here, I am from France, 45 years old, glider pilot and hang-glider pilot too.



I just find a used Kolb Ultrastar who was buy in 1987 (kit) an finished in 1990. I 'll get it and see it for the first time on mid november.



I want to ask if there is required structural modification (ie wing drag strut) since this date of built to check the plane and see if I need to make re-inforcement.



Thks in advance.



Have fun fly.



Jean

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Dana

Joined: 13 Dec 2007
Posts: 1047
Location: Connecticut, USA

Posted: Thu Oct 30, 2008 2:56 am Post subject: Required structural modification needed

At 05:02 AM 10/30/2008, Jean Pillaudin wrote:



  	  Quote: 	
		  I just find a used Kolb Ultrastar who was buy in 1987 (kit) an finished in 1990. I 'll get it and see it for the first time on mid november.



 I want to ask if there is required structural modification (ie wing drag strut) since this date of built to check the plane and see if I need to make re-inforcement. 	


 Jean,



  From the UltraStar manual:  "The UltraStar was successfully flight tested to 5-1/2 G's without this brace.  To obtain this loading requires a steep (about 45 degrees) high speed full power dive to 90 mph and an abrupt pullout.  For normal flying the brace is not necessary.  With this in mind you can decide whether or not you want to add the brace." My UltraStar does have the brace, but if it didn't, I wouldn't hesitate to fly it anyway, and add it at such time as the plane needed to be recovered.



 You can see the brace if you cut a slit in the fabric of the wing root and shine a flashlight in there.  This is a good idea anyway, to inspect the inside of the wing and make sure everything is as it should be.  There is a Kolb UltraStar Yahoo group <http://groups.yahoo.com/group/KolbUltrastar/>, and in the files section of the group is the UltraStar manual.  In the manual, between "ailerons" and "tail", is a description of the brace, as well as a drawing, so you know what to look for.



 -Dana



 

 --

  We're bored,

 We're heavily armed,

 We're off our medication,

 Is the post office still hiring?    [quote][b]

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Jean Pillaudin

Joined: 30 Oct 2008
Posts: 26
Location: France

Posted: Thu Oct 30, 2008 4:30 am Post subject: Required structural modification needed

Hi Dana,



Ho you don't know as I am feeling light!!! It is a very good new. Now I can check if this modification is done or not. And if it is not modified I just fly gently as I know the VNE speed of 75 Mph. Acrobatic is not my goal  

 



Just another question about the best glide ratio of this Plane:

Even if there is difference between each Ultrastar, what is the best glide ratio speed on it when engine is off? 



Happy flying!



Jean

 



2008/10/30 Dana Hague <d-m-hague(at)comcast.net (d-m-hague(at)comcast.net)>

[quote]  At 05:02 AM 10/30/2008, Jean Pillaudin wrote:



  	  Quote: 	
		  I just find a used Kolb Ultrastar who was buy in 1987 (kit) an finished in 1990. I 'll get it and see it for the first time on mid november.



 I want to ask if there is required structural modification (ie wing drag strut) since this date of built to check the plane and see if I need to make re-inforcement. 	




 Jean,



  From the UltraStar manual:  "The UltraStar was successfully flight tested to 5-1/2 G's without this brace.  To obtain this loading requires a steep (about 45 degrees) high speed full power dive to 90 mph and an abrupt pullout.  For normal flying the brace is not necessary.  With this in mind you can decide whether or not you want to add the brace." My UltraStar does have the brace, but if it didn't, I wouldn't hesitate to fly it anyway, and add it at such time as the plane needed to be recovered.



 You can see the brace if you cut a slit in the fabric of the wing root and shine a flashlight in there.  This is a good idea anyway, to inspect the inside of the wing and make sure everything is as it should be.  There is a Kolb UltraStar Yahoo group <http://groups.yahoo.com/group/KolbUltrastar/>, and in the files section of the group is the UltraStar manual.  In the manual, between "ailerons" and "tail", is a description of the brace, as well as a drawing, so you know what to look for.



 -Dana



 

 --

  We're bored,

 We're heavily armed,

 We're off our medication,

 Is the post office still hiring?    

 	  Quote: 	
		  

	




[b]

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Jean Pillaudin

Joined: 30 Oct 2008
Posts: 26
Location: France

Posted: Thu Oct 30, 2008 6:16 am Post subject: Required structural modification needed

I just see the picture in the Kolb Manual on Yahoo group, it is clear!



Thank's again Dana for your input.



Jean



2008/10/30 Jean PILLAUDIN <jean.pillaudin(at)gmail.com (jean.pillaudin(at)gmail.com)>

 [quote]Hi Dana,



Ho you don't know as I am feeling light!!! It is a very good new. Now I can check if this modification is done or not. And if it is not modified I just fly gently as I know the VNE speed of 75 Mph. Acrobatic is not my goal  

  



Just another question about the best glide ratio of this Plane:

Even if there is difference between each Ultrastar, what is the best glide ratio speed on it when engine is off? 



Happy flying!



Jean

  



2008/10/30 Dana Hague <d-m-hague(at)comcast.net (d-m-hague(at)comcast.net)>



 	  Quote: 	
		     At 05:02 AM 10/30/2008, Jean Pillaudin wrote:



  	  Quote: 	
		  I just find a used Kolb Ultrastar who was buy in 1987 (kit) an finished in 1990. I 'll get it and see it for the first time on mid november.



 I want to ask if there is required structural modification (ie wing drag strut) since this date of built to check the plane and see if I need to make re-inforcement. 	




 Jean,



  From the UltraStar manual:  "The UltraStar was successfully flight tested to 5-1/2 G's without this brace.  To obtain this loading requires a steep (about 45 degrees) high speed full power dive to 90 mph and an abrupt pullout.  For normal flying the brace is not necessary.  With this in mind you can decide whether or not you want to add the brace." My UltraStar does have the brace, but if it didn't, I wouldn't hesitate to fly it anyway, and add it at such time as the plane needed to be recovered.



 You can see the brace if you cut a slit in the fabric of the wing root and shine a flashlight in there.  This is a good idea anyway, to inspect the inside of the wing and make sure everything is as it should be.  There is a Kolb UltraStar Yahoo group <http://groups.yahoo.com/group/KolbUltrastar/>, and in the files section of the group is the UltraStar manual.  In the manual, between "ailerons" and "tail", is a description of the brace, as well as a drawing, so you know what to look for.



 -Dana



 

 --

  We're bored,

 We're heavily armed,

 We're off our medication,

 Is the post office still hiring?    

 	  Quote: 	
		  

	




	




 [b]

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Dana

Joined: 13 Dec 2007
Posts: 1047
Location: Connecticut, USA

Posted: Thu Oct 30, 2008 1:50 pm Post subject: Required structural modification needed

At 08:27 AM 10/30/2008, Jean PILLAUDIN wrote:



 	  Quote: 	
		  Just another question about the best glide ratio of this Plane:

Even if there is difference between each Ultrastar, what is the best glide 

ratio speed on it when engine is off?


	


I've never seen it published, nor have I tried to measure it, but like most 

ultralights it should be pretty slow.



-Dana

--

  When authorities warn you of the sinfulness of sex, there is an important 

lesson to be learned. Do not have sex with the authorities.

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