Light wind Wing Loading ?

[cyclops2]

I need to know if 8 ounces per square foot is considered a good weight for a scale U2 to be flown up to height with a fixed blade pusher prop and then glided around.

The motor / battery can run for a 1/2 hr at WOT.
Thrust is 11 oz. & 40 mph prop speed.
RTF weight is 21 oz.
W A is 2.5 S F
W S is 66"

Thanks

[pmullen503]

That is a cubic wing loading of around 5.1 which is very light for a trainer or on the heavy side for a pure glider. In short, it should fly just fine with your power set up.

[cyclops2]

What does cubic wing loading affect. Compared to ounces per square foot ?

[JetPlaneFlyer]

Cubic wing loading takes into account the size of a plane and is a number that gives a guide to the way the plane will 'feel' in flight.

Conventional wing loading is ok but of limited use unless you take into account the size of the plane. For instance a 8oz/sq ft loaded ultra micro would 'feel' like a flying brick to fly, but the same wing loading on a giant scale would fly like a feather. Cubic loading is an attempt to come up with a guide that works for any scale.

[cyclops2]

I am unable to use cubic loading..............I am a terrible pilot.

So I never can rate a plane other than ........I did not crash. Perfect flight.

It also explains why I always build very light when in doubt.

The student pilot in my AT-6 has his arms crossed in front of his face.

Thank you.

[CrimzonRider]

Cy, I doubt your a terrible pilot....flying a U2 EDF....

Just in my short time of rc'ing, IMHO I think it would be a fair floater maybe a little bit fast on landing. I seen your posts on rcg.com...Are you thinking about a long motor shaft or a power pod?


cr

[quorneng]

cyclops2
Was there a reason why you chose to have it as a tail mounted pusher rather than a nose mounted tractor?
Spreading the masses to the fuselage extremes can have an impact on the aerodynamic stability damping and the loss of prop wash does alter the control effectiveness.

My extreme duration plane (Span 48" weight 14.5oz RTF with a 5000mAh 2s) is a pusher but wing mounted to keep the masses more concentrated.