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hobby king F-104 Starfighter - 10/30/2012 12:11 PM   
fredo



Posts: 306
Score: 100
Joined: 7/6/2003
Last Login: 5/18/2013
From: Brisbane, AUSTRALIA
Status: offline 		Hi guys
Does anybody know where the CG on this thing supposed to be? I just bought it from hobby king but the instructions inside are like for mentally challenged. So if anybody had a go with this challenging EDF please let me know.


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RE: hobby king F-104 Starfighter - 11/16/2012 9:35 PM   
ljsoarinson


 

Posts: 24
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Joined: 5/8/2003
Last Login: 5/8/2013
From: Bloomington, MN, USA
Status: offline 		Fredo, I have not had experiece with the Hobby King model but have flown other F-104s. Be warned, it needs to be farther forward than you may think. If you calculate it just based on the wing shape it will be to far back. The fuselage adds significant lift so that needs to be figured in. And if you fly an F-104 with aft CG, the usual effect is the plane will pitch up and loose flying speed. At that angle of attack the wing will blank the elevator making it even less effective helping to ensure a stall.

The CG in most planes is around 20 to 30 percent of the mean aerodynamic chord. The F-104 usually comes out around 10 to 15%. Hope this helps, maybe someone can chime in who has experience with the HK version. Best of luck!

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RE: hobby king F-104 Starfighter - 11/17/2012 10:39 PM   
r-c-guy


 

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Joined: 3/4/2002
Last Login: 5/19/2013
From: Hilton Head Isl, SC, USA
Status: offline 		Hi
If you build it their way and put their battery in, it comes out good.
I marked it and then made sure if I used different stuff, it came out the same.
rv

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RE: hobby king F-104 Starfighter - 11/20/2012 11:31 PM   
fredo



Posts: 306
Score: 100
Joined: 7/6/2003
Last Login: 5/18/2013
From: Brisbane, AUSTRALIA
Status: offline 		Thanks guys, I just read all heap of info on RC groups, yes is comes surprisingly about 3/4" benind the leading edge at the root. I think those huge intakes must be producing some lift as well.
I'm about to maiden her, soon as the weather gets better.

Cheers

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RE: hobby king F-104 Starfighter - 11/21/2012 12:52 AM   
r-c-guy


 

Posts: 204
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Joined: 3/4/2002
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From: Hilton Head Isl, SC, USA
Status: offline 		Wind (steady) was best!

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