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How do I set the CofG

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Fred:
If I may add, the CoG is roughly 1/3 of the average chord of the wing! (like for the Crystal, it's almost 50% of the root chord...)
But also depend of the calage to complicate the thing slightly further  :P

Saw on another forum, the greatest advice ever to find the correct CoG of a plane !... This is where the wing is the thickest ! Whatever wing shape, size, profile etc  :shock:

Anyway, centre the plane like they say in the manual, and you will refine it in flight.

gerryb:
hi sean,
adding my tuppence worth.....everything said so far is spot on. now, to check cg in flight. fly the model to about 3 to 4 hundred feet. might seem a lot with what looks like a small model but you need to have plenty of sky under the model to recover. ok, at height, face model into wind, power off, apply down elevator to make the model dive (not too steep, mind you!) relax your grip on the stick and see what the plane does.
if it recovers in a long slow arc, your cg is spot on.
if it pulls up fairly sharply, cg too far forward. move battery back or remove lead.
if it continues to dive, cg too far back. move battery forward or add lead.
any changes you make should be one at a time and in small amounts.
have you anyone locally to help with your 1st flights?
gerry

skyhawk newbie:

--- Quote from: "Fred" ---If I may add, the CoG is roughly 1/3 of the average chord of the wing! (like for the Crystal, it's almost 50% of the root chord...)
But also depend of the calage to complicate the thing slightly further  :P

Saw on another forum, the greatest advice ever to find the correct CoG of a plane !... This is where the wing is the thickest ! Whatever wing shape, size, profile etc  :shock:

Anyway, centre the plane like they say in the manual, and you will refine it in flight.
--- End quote ---


There's nothing in the manual about setting the CofG....
and as I'm totaly new to all this flying lark , your going to get lots of silly question from me....

skyhawk newbie:

--- Quote from: "gerryb" ---hi sean,
adding my tuppence worth.....everything said so far is spot on. now, to check cg in flight. fly the model to about 3 to 4 hundred feet. might seem a lot with what looks like a small model but you need to have plenty of sky under the model to recover. ok, at height, face model into wind, power off, apply down elevator to make the model dive (not too steep, mind you!) relax your grip on the stick and see what the plane does.
if it recovers in a long slow arc, your cg is spot on.
if it pulls up fairly sharply, cg too far forward. move battery back or remove lead.
if it continues to dive, cg too far back. move battery forward or add lead.
any changes you make should be one at a time and in small amounts.
have you anyone locally to help with your 1st flights?
gerry
--- End quote ---


Had my first flight last Saterday...
I crashed....Broken prop and cracked wing....
Fixed the wing,just waiting for 3 props to come from the UK
and another 2x SkyHawk gliders  from Hong Kong,just incase

Found out yesterday theres a local flying club
near where I live that meets every Saterday...
So hopefully they'll be there this weekend....
If the weather is OK

Sean

Happy Days:
That’s what you need Sean……….a local flying club. :D  
They’ll be able to show you what to do and help answer some of your “silly” questions.

(Actually there is no such thing as a Silly question. It’s far sillier to try and fly a plane without knowing what your doing, than to ask someone what to do first. There isn’t a pilot alive how hasn’t asked ”silly” questions at some point. :wink: )

Good Luck, let us know how you get on.

Keith
(I still ask silly questions............... :roll: )

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