Gliders > Slope Soaring

Yet another

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Fergal Gordon:
Hi John,

I have a spreadsheet that I have found to work very well for calculating the theoretical C of G.  It is based on calculations set out in Model Aircraft Aerodynamics by Martin Simons.   You need some measurements of the wing and tail, and their spacing.  The output is a graph of C of G against static margin.  Typically, the static margin should be between 5% and 15%.  15% should give a docile model that is easy to fly, while 5% will be very lively, ideal for aerobatics.

I could e-mail you the spreadsheet if you think it might be of help.


Best regards,


Fergal

skyhawk newbie:

--- Quote from: "Fergal Gordon" ---Hi John,

I have a spreadsheet that I have found to work very well for calculating the theoretical C of G.  It is based on calculations set out in Model Aircraft Aerodynamics by Martin Simons.   You need some measurements of the wing and tail, and their spacing.  The output is a graph of C of G against static margin.  Typically, the static margin should be between 5% and 15%.  15% should give a docile model that is easy to fly, while 5% will be very lively, ideal for aerobatics.

I could e-mail you the spreadsheet if you think it might be of help.


Best regards,


Fergal
--- End quote ---


Got a link  ...  
Think I could use something like that on some of my gliders..



Sean

johnfireball:
Hi,
   Got this from Hobby King. I'm hoping my 7 & 8 year old son & daughter might be interested in flying it (get them off those game machines). Love to see spreadsheet Fergal.
jjd385@gmail.com

John.

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