Weston Magnum R with 50V1

[Lofty 5]

This one http://cgi.ebay.co.uk/Mirus-High-Performance-Model-Aircraft-Kit_W0QQitemZ160002842388QQihZ006QQcategoryZ19164QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

 

o yes, that's the one....

[Her Klunk 0]

IF no luck with Ebay I have a C of G Calculator program all I need to know is the root chord tip chord wing span and sweep distance from leading edge of root chord back to leading edge of the tip chord.

 

From these numbers I can calc a good starting point for the c of g.

[Nutz 0]

I will take some pictures & measure ments for you & poset them later.

 

Thanks

[Nutz 0]

OK had a reply back from eBay

 

"Hello, the plan shows the CG at 320mm from the front of the fuselage.

 

Regards,

 

Burnhow"

 

So I take it this means the front of the engine bay & not the front of the spinner, does this sound right?

[Her Klunk 0]

A test I have also used is to hold the wing tip at the leading edge so fuse is horizontal to ground and drop an invisible line at 90 degrees IE straight down to the fuse and that is usually a good c of g starting point. This is a rule of thumb I have picked up from many of my designs that seems to work well.

 

But get the measurements I asked for and i will calc the c of g from the LE of the wing at the fuse. As a simple observation i would have thought the c of G will be about 1 inch in front of the middle wing bolt. I assume those bumps are three wing bolts

[Nutz 0]

Wing measurments

 

[Her Klunk 0]

I have put the numbers in the program to calc the cofg and it spits out

 

two sets

 

@25% of MAC 226 mm from Leading edge of wing at root or Fuse.

@33% of MAC 250 mm from Leading edge of wing at root or Fuse.

 

Hope this helps, but it look ok on Sunday to me maybe a tad nose heavy.

 

André