Mah = lighter plane

[Ohio AV8TOR]

Having fun with it I found this -

Yes, the change of the mass is pretty much negligible and can't be measured by current scales. The difference boils to Einstein's E=mc2 that follows from his special theory of relativity. Energy is equivalent to mass and c2, the squared speed of light, is the conversion factor. For example, Chevrolet Volt has batteries that may store 16 kWh. Multiply it by 1,000 and 3,600 to get the value in Joules; divide it by 1017 which is (approximately) the squared speed of light and you get the mass difference in kilograms. It's about

16×1,000×3,600/1017=0.6×10−9. That's half a microgram – for this huge Chevrolet Volt battery.

 

[siko_flyer]

Dang it Ray,why did you have to go get all serious and ruin this thread?I had a smart ass comment but now I can't post it.:miserable:

 

[yakken]

I can tell when my plane loses a microgram. I always wait to torque roll so its tail heavy

 

[jaybird]

Ohio AV8TOR;10745 wrote: Having fun with it I found this -

Yes, the change of the mass is pretty much negligible and can't be measured by current scales. The difference boils to Einstein's E=mc2 that follows from his special theory of relativity. Energy is equivalent to mass and c2, the squared speed of light, is the conversion factor. For example, Chevrolet Volt has batteries that may store 16 kWh. Multiply it by 1,000 and 3,600 to get the value in Joules; divide it by 1017 which is (approximately) the squared speed of light and you get the mass difference in kilograms. It's about

16×1,000×3,600/1017=0.6×10−9. That's half a microgram – for this huge Chevrolet Volt battery.

So what your saying is my math was a little off...

 

[Ohio AV8TOR]

siko_flyer;10750 wrote: Dang it Ray,why did you have to go get all serious and ruin this thread?I had a smart ass comment but now I can't post it.:miserable:

That was my smart ass comment :smile-new:

 

[ExtraNuts]

This must be why one of my planes feels like it hovers better at the end of a flight. Its batteries are in front of the wing tube. :running-lol:

 

[7oneWo1f]

Bartman;10729 wrote: i was starting to think you guys were really serious about this

So was I. I've met a guy who told me this...he flies glow.

 

[Robotech]

That is why I never use battery packs or the fuel tank to adjust CG. They change in flight.

 

[Xpress]

I charge my batteries up to 75% to keep maximum power/weight ratio possible.

 

[yakken]

This really screws me up on my foamies