flying helis at gravity 9.8 you like it?

[pgkevet]

maybe there are some places in the universe where is a random gravity during the day

pilots over there do have a gravity dial on the transmitter / the pitch degrees will change and are different when flying morning or afternoon or evening

Once again: If gravity is much higher then air density (assuming the same earthly proportions) would be much higher so more lift and more drag on the rotors. I suspect you would need to reduce pitch or keep it the same; certainly need more powerful motors or reduced rpm. In any event the model will fly slower through the soup..

[FuturaSE]

for crying out loud iv no clue GOOD THINKING MAN

But if gravity goes up, so does the density of the air. = more lift... So would the same pitch lift the increased weight?

[AcidDrink]

Try to fly underwater to get an idea. Make sure you video it and post here.

[Mike Sanders]

I recently acquired one of those helium filled birthday party balloons. I took the plastic teddy off the string and tied on some strips of paper. By getting the amount of paper right the balloon achieved zero gravity. It is very graceful floating round in the very slight air currents in my house. As it loses its gas slowly I tear off pieces of the paper to maintain the equilibrium. It is a very gentle alternative to helis. Some might say, simple things please simple minds.2013.04.14 016.jpg

[FuturaSE]

questions questions questions

maybe there is a planet where they all start flying inverted

and its only 3d masters who can fly upright

[Rotorhead]

this sport at earth is so cooooooool

we are playing with our current planet earth gravity

wiki: "According to the Bureau International de Poids et Mesures, International Systems of Units (SI), the Earth's standard acceleration due to gravity is:

g = 9.80665 m/s2 = 32.1740 ft/s2).[20][21]"

imagine there are so many planets with a different gravity

WE ARE 9.8 pilots

if the gravity would be 2 times bigger the helicopter would need maybe +25 degrees pitch and only 2 degrees negative

or what if the gravity was 5 times smaller?

FOR ME 9.8 works !!

[ATTACH=CONFIG]59536[/ATTACH]

whats your opinion about flying other gravity and places in the universe??

If gravity were more powerful the atmosphere would be at a much higher pressure and density near the surface, so it would produce more lift and drag per angle of pitch anyway, whether that balances out the higher weight of the helicopter is hard to say, I have a feeling it would be about even at least for a certain amount, and 25 would be a stalled aerofoil.

Oh and don't drink and fly.

A little more lateral thinking and more information...
On your higher gravity world: what atmosphere and atmospheric pressure at the flying height? Consider if the gas mixes are different how that might affect design/lift/bouyancy and aerofoils..
On your lower gravity world: can it hold an atmosphere? The moon has 1/6th our gravity but blades aren't gonna work.

What if the effect of gravity isn't even.. say a flattened disc-shaped planet. What woudl the gravity be at the flattened centre compared to the edge of the rim?

I think it would be fairly uniform at least over a short band of altitude, and earth does have different gravitational strengths (9.81 being the average) depending on how far you are from the equator, since the earth bulges out slightly there gravity is slightly less than at the poles, and because of the earths spin space agencies prefer to base their launch sites near there as it helps counter a small percentage of the weight of their craft, which can save them a lot of money each launch.

How about a massive hollow sphere, and we live on the inside surface of it, with a sun in the centre. Would gravity act toward the surface?
I blame the Labrador to be honest.....
Rachel knows.....

They did that on star trek, scotty was hiding in it

[dillwhacker]

[QUOTE=Rotorhead;1013892]
because of the earths spin space agencies prefer to base their launch sites near there
[QUOTE]
Isn't it because the rotational velocity at the equator gives them a slingshot effect?

[FuturaSE]

If gravity were more powerful the atmosphere would be at a much higher pressure and density near the surface, so it would produce more lift and drag per angle of pitch anyway, whether that balances out the higher weight of the helicopter is hard to say, I have a feeling it would be about even at least for a certain amount, and 25 would be a stalled aerofoil.

Oh and don't drink and fly.



I think it would be fairly uniform at least over a short band of altitude, and earth does have different gravitational strengths (9.81 being the average) depending on how far you are from the equator, since the earth bulges out slightly there gravity is slightly less than at the poles, and because of the earths spin space agencies prefer to base their launch sites near there as it helps counter a small percentage of the weight of their craft, which can save them a lot of money each launch.



They did that on star trek, scotty was hiding in it

great text ty

quote" Oh and don't drink and fly."

images.jpeg

[Steve]

Forty Two...

Life is paradoxically coincidental to the ironical tyranny applicable to the unparalleled definition of reverse entropy.

Don't Panic.

The mice are in charge.

[FuturaSE]

THERE ARE 100 BILLION GALAXIES ACCORDING TO NASA

THEY ARE SEARCHING FOR AT LEAST 10 EARTH LIKE PLANETS IN OUR GALAXy THE MILKY WAY

THERE ARE AT LEAST 100 BILLION EARTH LIKE PLANETS !!!!!!!!!!!!!!

there is a real chance we all are pretty stupid

but hey who cares we fly helis 3D at 9.8

[FuturaSE]

Try to fly underwater to get an idea. Make sure you video it and post here.

what agreat idea
would it be possible flying rc helis underwater?

ty AD

[FuturaSE]

Forty Two...

Life is paradoxically coincidental to the ironical tyranny applicable to the unparalleled definition of reverse entropy.

Don't Panic.

The mice are in charge.

no mouse mo mices
nobody is in charge, only you and yourself!!

"if you want to imagine you can you can do whatever you want just do it"

[dillwhacker]

would it be possible flying rc helis underwater?

I don't see why not - need a different shaped rotor to cope with cavitation etc , but, be a bit like the sim if you turn the speed down to 5% - pretty boring....you could have a conversation about how to compllete a flirro-pip while the heli sloshed around...
Time for some maths.
The moon's mass is eighty times less than the Earths..
So why is its gravity so high at one sixth of the earths?
Answers on a postcard please, no words, just the maths.
I'm off for a large one.
Cheers!

[Steve]

Submarines 'fly' through the water. The basics of of hydrodynamics aren't that different to those of aerodynamics.

[dillwhacker]

Forty Two..

Steve, please concentrate.......
This is teckkie BS so we talk in hex.
2A or not 2A, that is the question ...... hang on .... that doesn't work.....
See you soon up the hill I hope !
Trev