Thread: Build Log Henschel HS129 B-3
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Old Jan 24, 2013, 10:43 AM
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Boyertown, Pa
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Quote:
Originally Posted by heli_madken View Post
I designed a shelf for weight up at the front of the nose so its easy to get lead in there, it took 1.08Kg (2lb 6oz) to achieve the 90mm CG

So with the estimated finished weight now at 9.5kg wing loading has increaseed to 35.4 oz/sq.ft with pretty much the same stall speed as before 29.5mph

Any opinions?
Ken - in my opinion a WL of 35 on a model of that size will be no problem. Wing volume is the key and as long as you have washout it should be a stable floater. I would run the cube numbers again but they probably won't change much, thus proving my point. I also agree with the comments about flying it more nose heavy than it should be according to the calculations and 25% MAC on a semi symmetrical wing seems about right. If it is sluggish on the controls and wants to come down right away when you cut the power, you can move it back from there.
Rob
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