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Dimension of speedster tips

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canpilot03(at)yahoo.ca
Guest

Posted: Wed Jan 31, 2007 6:03 am Post subject: Dimension of speedster tips

Hi All,

   

  I want to build a set of fiberglass speedster wing tips for my Model 4!( droop tips now)

  Could some one with time on their hands measure their tips for me and give me some Dimensions!

  1......angle from bottom to top surface

  2......distance from inboard edge to out board edge (top suface only needed)

  3...... radius at leading edge

  4...... thickness of fibreglass

   

  I am going to carve these tips from blue foam and glass them ,then remove the foam!

   Has anyone done this ?Any suggestion are greatly appreciated!

  Many thanks

                                          Gil Levesque

                                           Model 4 1050

                                          Rotax 582

                                          



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Michel

Joined: 10 Jan 2006
Posts: 966
Location: Norway

Posted: Wed Jan 31, 2007 7:07 am Post subject: Dimension of speedster tips

 	  Quote: 	
		   From: Gill Levesque [canpilot03(at)yahoo.ca] 

   I am going to carve these tips from blue foam and glass them

 ,then remove the foam!


	


I don't know what "blue foam" is, Gil, but you should first test if it doesn't dissolve in the polyester or epoxy. I think that, for that respect, you're safer with epoxy. Why do you want to remove the foam after? If you leave it there, it makes a great sandwich construction and you can use a thinner layer of glassfiber , hence lighter. Working with glassfiber reinforced plastics, the general thumb rule is that you must have at least 70% of the weight as glassfiber. Because that is what gives strenght. The plastic is only to glue and keep in place the glassfiber.



Cheers,

Michel

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JimmieBlackwell(at)austin
Guest

Posted: Wed Jan 31, 2007 8:37 am Post subject: Dimension of speedster tips

Gil

  

 I will try to get the measurements you need  tomorrow or Friday, Wx permitting.  Wx here in Central Texas is to cold for  this cowboy to go flying or even be in the hangar.

  

 Please elaborate a little more on the measurement  you need for the, "radius at leading edge".

  

 Jimmie

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smokey_bear_40220(at)yaho
Guest

Posted: Wed Jan 31, 2007 9:33 am Post subject: Dimension of speedster tips

Hi Gill,



You might check with John McB first and see what his

costs from the factory.



Also John was going to produce some clear tips where

you could install your wing lights inside and keep the

tips clean from drag.  Easy for walk around

inspections too.



Third, I think 2 layers of light weight S glass over

the foam and leave the foam there would work.  (AKA

Michels idea) You can carve hunks out of the foam and

leave "ribs" to lighten it up, if you want.  I have

been thinking of adding foam ribs to mine to reduce

the concave upper surface problem mine has. Leaving

the foam in assures you retain the shape.



I have epoxied over foam, smoothed and light sanded to

get a good surface, then glassed over that for a very

nice finish on my rudder gap seal.  Worked well.  Not

sure about the weight on a larger surface, but you can

sand down the inside after you remove the foam if you

go that way.



Just some ideas...



Kurt S.

--- Gill Levesque <canpilot03(at)yahoo.ca> wrote:



 	  Quote: 	
		   Hi All,

    

   I want to build a set of fiberglass speedster wing

 tips for my Model 4!( droop tips now)

........  
	


 	  Quote: 	
		     I am going to carve these tips from blue foam and

 glass them ,then remove the foam!

    Has anyone done this ?Any suggestion are greatly

 appreciated!

   Many thanks

                                           Gil


	




 

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in 45,000 destinations on Yahoo! Travel to find your fit.

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lcfitt(at)sbcglobal.net
Guest

Posted: Wed Jan 31, 2007 12:08 pm Post subject: Dimension of speedster tips

Gil,

For some reason I didn't get your original post, just a couple of replies. 

What you are suggesting will work fine in my experience.  I think the trick 

will be making them both the same so you don't introduce a roll tendency. 

The foam will help there.  You may want to make some templates with the 

profile you want and match the left and right to minimize twist.

For final finish, the glass airplane folks will use a thick mix of 

microballoons and epoxy to fill the weave.  It is very light weight and very 

easy to sand.  It sounds like a fun project.  I'd say go for it.

Lowell

 	  Quote: 	
		   --- Gill Levesque <canpilot03(at)yahoo.ca> wrote:

> Hi All,

>

>   I want to build a set of fiberglass speedster wing

> tips for my Model 4!( droop tips now)

 .........

>   I am going to carve these tips from blue foam and

> glass them ,then remove the foam!

>    Has anyone done this ?Any suggestion are greatly

> appreciated!

>   Many thanks

>                                           Gil

 Now that's room service!  Choose from over 150,000 hotels

 in 45,000 destinations on Yahoo! Travel to find your fit.

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Michel

Joined: 10 Jan 2006
Posts: 966
Location: Norway

Posted: Wed Jan 31, 2007 1:46 pm Post subject: Dimension of speedster tips

On Jan 31, 2007, at 9:06 PM, Lowell Fitt wrote:

 	  Quote: 	
		   For final finish, the glass airplane folks will use a thick mix of 

 microballoons and epoxy to fill the weave.  It is very light weight 

 and very easy to sand


	


I did the finish on my customised cowling with West Systems 

microballoons and epoxy. Great stuff! Go for it, Gil!



Michel

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barry(at)pgtc.com
Guest

Posted: Wed Jan 31, 2007 2:18 pm Post subject: Dimension of speedster tips

Blue foam works fine.



Barry West

---

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ppeerenbo(at)charter.net
Guest

Posted: Wed Jan 31, 2007 6:28 pm Post subject: Dimension of speedster tips

I also want to do the same, but I was thinking of  modifying the drop tips

  

 Paul N102DG

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