ORIGINAL: bobmac010

Wow - I read a lot of this thread, skipping the 12 pages prior to this one and the only thing that I learned is that once someone makes a statement that is seemingly absurd, a lot of other people chime in, some with good advise, and facts, others with twisted views and mis-information.

CG matters in ALL aircraft, heavier than air, lighter than air too.
Try having the CG of a zeplin 1/2 way from nose to tail, but place it above the centerline. Yeah, it would fly, but upside-down...
Take the ultra low wing loading on some of the indoor free flight models. The CG can be swung around a lot, but it DOES matter.
Try placing the CG behind the front wing, (I say front wing because a lot of the indoor FF models have a tail surface almost 80% of the main wing). If the tail surface were large enough, as many of them are, it would fly more on the principals of a canaard rafther than conventional aircraft.

If you do that on a well proportioned 33% Extra, make sure that there is nobody at the field, 'cause it will be disasterous, and an embarrasing waste of money.

What a lot of modelers may realize through experience, but may not have had it explained to them is, aerodynamics is not proportionate to scale. The size of the air molecules do not change with the size of the model.
When you get really small, the rules change a little bit.
When you get really light wingloading, the widely accepted limits on design are blown open, but they still do matter.

I think that this thread is absurd, and not suprized that the last post was 4 months ago...
It should be wiped clean and restarted without the extremes.

I think this should be for beginners, and there is nothing in here that a beginner can pickup and take to his/her workbench without shaking his/her head wondering what to believe as true fact.

Bob