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old nieuport 17 model

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tony oneill 122/05/2019 10:34:49
68 forum posts
49 photos

Hi all, i bought an old nieuport 17 model at an auction and decided to try and get it flying. i had to strip some old covering off and as a temporary measure i replaced it with what i had laying around until i get it flying properly. in the meantime would anyone know where the C of G is on a model like this? its about 1.1m wide, just under 1m long and is fitted with an electric motor, similar to a ripmax quantum 2 .40 equivalent. I tried a 14.4 4 cell battery but this seem too large and heavy so i was going to try an 11 volt 3 cell instead.

would the C of G be a point between the ends of the main spar but in the center of the wing? which would put it at a point near the back of the wing above the cockpit. it does have a sweep on the main wing.

tony.

Jon - Laser Engines22/05/2019 12:49:30
4651 forum posts
173 photos

my flair example balances just in front of the rear strut for the top wing and isnt that fussy as i experimented with various levels of ballast and it didnt seem to make any difference at all

John Lee22/05/2019 13:01:06
628 forum posts
46 photos

On the Radio Modeller Plan version, RM149, designed by my old Clubmate Eric Robinson, the CG is about 75% of the shortest point on the upper wing centre chord.

The semi-circular central cut-out on the trailing edge of the wing means it would be about 60% of the chord if there was no cut-out & also corresponds to the leading edge of the lower plane.

tony oneill 122/05/2019 15:34:18
68 forum posts
49 photos

Thanks guys, great information. This is actually further back than i thought. Leading edge of the lower wing will be the starting point then.

Thanks for your help.

Tony

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