37% Krill Yak CG Location?

[PLANKBONE]

Hey Giants, I picked up a used krill yak which didn't include the manual. I looked on Krill's website and wasn't able to find the CG location on this bird. If anyone could direct me or would be willing to copy a manual for me, it would be greatly appreciated! Thanks in advance!

[CDN-uavpilot]

While you are waiting for a manual, you can get an estimate of the cg location using online calculators that are available on the web:

for a simple calculation based on the wing geometry, use
http://www.scaleaero.com/CG_Calculator.htm with %MAC BP = 30%

if you have a more complete set of dimensions, use
http://adamone.rchomepage.com/cg_calc.htm with a static margin of 10%

In either case, the cg will be fairly close to one another.

I decided to use these calculators because I got tired waiting for someone to provide a manual.

	Quote: Originally Posted by PLANKBONE
	Hey Giants, I picked up a used krill yak which didn't include the manual. I looked on Krill's website and wasn't able to find the CG location on this bird. If anyone could direct me or would be willing to copy a manual for me, it would be greatly appreciated! Thanks in advance!

[xtra330]

I will check my files for the Yak 55 tonight and post what I have...

[The_Wreck]

Send CRHAMMOND a PM and ask. He bought my krill and should have the information. I cannot remember it exactly. Like 320mm from the cowl line. I had it balanced just aft of the wing spars, and it was hands off inverted, and would slowly climb out of an inverted 45. It was still a little tailheavy for my liking.

[xtra330]

here ya go -

[The_Wreck]

what a memory I have. The drawing is misleading in that it makes the CG look like it is in front of the spar.

[PLANKBONE]

	Quote: Originally Posted by xtra330
	here ya go -

ASK AND YOU SHALL RECEIVE! Thats what I'm talking about! Thank you guys so much for your help. I hope to have it balanced with a DA-150 and cans, but heard stories that they are tail heavy models. One more request. By chance do you guys know the recommended throws? I konw it's mainly pilot preference, but I'd like to know the range. Thanks again for all the info! You guys rock!!! -Brian

[xtra330]

just found this on the Krill web site, new recomended CG range....more info on throws, etc...
www.krill-model.com

[PLANKBONE]

Well I got all my equipment installed and as expected the yak is very tail heavy! Anyone else have this issue. Do they fly well tail heavy. I don't think this will be my IMAC bird!