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        Discussion Hyperion Sniper x II COG?

#1 tupeloflyer Dec 09, 2012 06:52 PM

Hyperion Sniper x II COG?
 
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Put together a Sniper x II this weekend only to have crappy weather today when I was ready to maiden! but my question is where exactly is the CG on this plane? the instructions states,, balance on fingers, slightly nose down at 120mm-130mm behind leading edge of wing.. and in the picture right above this shows 135mm-145mm behind LE of wing?? which is it? I'm balancing pretty good with fingers on the carbon fiber spar, which is about 135mm BLE with a 2200mah 11.1v 3s around position in pic below. would like to know for sure before I cut a slot for pack in the fuse. If anyone has this plane and wants to share any tips before I fly if, feel free... I'm powering it with a eflite park 480 spinning a 11-4.7 SF prop? Thanks in advance....

#2 bobly Dec 09, 2012 08:03 PM

I can't help with what the right measured cg is, but I find it best to start out with a bit nose heavy and adjust to taste. Your battery might be a bit on the heavy side though. Also, unless you just want to, you don't have to cut out the fuse for the battery. On my Hacker's I just put velcro on the stiffner and on side of fuse with corresponding velcro on two sides of bats with the battery standing on edge. Then I can move battery around depending on conditions or how I want it to fly. If I want to fly in windy conditions I move it forward a bit. I have marks for the different positions and can also use different batteries this way. Lighter batteries give a more floaty flight and heavier batteries penetrate wind better.

#3 tupeloflyer Dec 09, 2012 08:55 PM

Quote:

Originally Posted by bobly (Post 23486376)
I can't help with what the right measured cg is, but I find it best to start out with a bit nose heavy and adjust to taste. Your battery might be a bit on the heavy side though. Also, unless you just want to, you don't have to cut out the fuse for the battery. On my Hacker's I just put velcro on the stiffner and on side of fuse with corresponding velcro on two sides of bats with the battery standing on edge. Then I can move battery around depending on conditions or how I want it to fly. If I want to fly in windy conditions I move it forward a bit. I have marks for the different positions and can also use different batteries this way. Lighter batteries give a more floaty flight and heavier batteries penetrate wind better.

Thanks! good idea, didn't think about putting velcro on stiffener too! yeah 2200mah might be a little heavy, but the next smallest I have is a 1300?? probably too small. the sniper x II is a big plane! 4ft ws and about 4ft long...

#4 maiden-crash Dec 11, 2012 03:57 PM

140mm is right, although the Sniper is forgiving to CG. They may have confused Sniper II cg with Sniper xII.

#5 tupeloflyer Dec 13, 2012 05:04 PM

Quote:

Originally Posted by maiden-crash (Post 23502303)
140mm is right, although the Sniper is forgiving to CG. They may have confused Sniper II cg with Sniper xII.

maiden-crash! I watched your vid on youtube flying your sniper x II! wow! your good dude! I flew mine for first time today and it's sweet, but a little sluggish? wonder if the park 480 is enough or prop size is ok? 11-4.7 slow flyer? roll rate is lazy too? look for new thread sniper x II question, i'll post pics


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