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View Full Version : Dirigibles v. Pogo sticks


Lurker the Second
25-05-2005, 16:36:26
http://mateengreenway.com/steampunk/dirigible.jpg


http://www.membrana.ru/images/articles/1033383064-9.jpeg


Seems like no contest to me.

Funko
25-05-2005, 16:37:26
BOUNCE! Pogopogopogo

Venom
25-05-2005, 16:40:44
Could you imagine a pogo stick on top of a dirigible? DOUBLE BOUNCE!

Funko
25-05-2005, 16:41:22
I am trying to imagine it but it's too bouncy for me.

Lurker the Second
25-05-2005, 16:42:37
That's a pretty cool dirigible. It's got that big long skewering rod and a floodlight and a motor and a place to sleep.

Funko
25-05-2005, 16:47:33
It's obviously flying over a very low gravity planet.

Venom
25-05-2005, 16:47:42
I think ol' Mateen has no idea about the properties of lift vs mass.

Venom
25-05-2005, 16:48:08
Well, that x-post just blew me to hell.

Funko
25-05-2005, 16:50:44
I hope that teaches you not to try and make smart posts.

zmama
25-05-2005, 16:54:43
I'm sure it was purely chance

The monkeys got lucky again :)

MDA
25-05-2005, 16:55:43
Just hearing the recording of the journalist as this thing goes up gives me chills. EVERY time I hear it.

Venom
25-05-2005, 16:58:17
It was also clever of me to use vs.

Lurker the Second
25-05-2005, 17:01:49
Originally posted by Venom
I think ol' Mateen has no idea about the properties of lift vs mass.

Yeah, I get that problem sometimes. Damn genetics.

KrazyHorse@home
25-05-2005, 17:23:58
Originally posted by Funko
It's obviously flying over a very low gravity planet.

Silly astro-type person.

The payload to gas ratio is not determined by the surface gravity of the planet, but rather density of the atmosphere.

In fact, a planet with higher surface gravity is more likely to have a very dense atmosphere, and thus is likely to be able to support much larger payloads for equivalent volumes of lifting gas.

Venom
25-05-2005, 17:28:42
BURN!

KrazyHorse@home
25-05-2005, 17:28:50
The relevant equation to be satisfied is:

g(Datm)(Vgas + Vpayload) = g(Dgas*Vgas + Mpayload)

where g is the surface gravity, Datm and Dgas are the mass densities of the atmosphere and lifting gas respectively, and Vgas and Vpayload are the volumes of the lifting gas and payload respectively.

As you can see, g is present on both sides and can be cancelled...

KrazyHorse@home
25-05-2005, 17:30:34
generally for dirigibles Vpayload << Vgas, thus the equation may be reduced to

Vgas(Datm - Dgas) = Mpayload

Lurker the Second
25-05-2005, 17:31:10
:lol:

We all knew that.

jsorense
25-05-2005, 17:34:28
blimps vs Venom
:lol:

Dyl Ulenspiegel
25-05-2005, 17:34:44
gas=payload

That's called substantial farting.

zmama
25-05-2005, 17:38:16
aka

Venom

Venom
25-05-2005, 18:15:02
I can float a blimp! YAY!

mr.G
25-05-2005, 18:25:09
i just say:

doooooooooooooooooooooooooooooooooooooooooooooo
di

mr.G
25-05-2005, 18:25:33
doooooooooooooooooooooooooooooooooooooooooooooo

Funko
26-05-2005, 09:14:09
Originally posted by KrazyHorse@home
Silly astro-type person.

The payload to gas ratio is not determined by the surface gravity of the planet, but rather density of the atmosphere.

In fact, a planet with higher surface gravity is more likely to have a very dense atmosphere, and thus is likely to be able to support much larger payloads for equivalent volumes of lifting gas.

Yeah, I worked that out immediately after I posted that spontaneous response but then I decided that as I'd got in before Venom I'd keep quite and not tell him he was right and I was wrong.

Should have remembered about all the anal scientists who wouldn't let a joke lie. :rolleyes:

Venom
26-05-2005, 13:08:23
Ha ha! I was right! Even if I didn't know it.

Funko
26-05-2005, 13:12:10
See! That's your fault KrazyHorse. You made Venom feel good, you wanker. :bash:

Venom
26-05-2005, 13:24:31
And you should feel terrible, for being wrong when I was right.

Funko
26-05-2005, 13:40:19
You dutchman.

Venom
26-05-2005, 13:41:55
You frenchwoman.

mr.G
26-05-2005, 13:44:06
you two

Lurker the Second
26-05-2005, 14:33:31
Funko can't be a frenchwoman. He shaves his pits.

mr.G
26-05-2005, 14:50:18
itchy

KrazyHorse@home
26-05-2005, 16:15:29
Originally posted by Funko
Yeah, I worked that out immediately after I posted that spontaneous response but then I decided that as I'd got in before Venom I'd keep quite and not tell him he was right and I was wrong.

Should have remembered about all the anal scientists who wouldn't let a joke lie. :rolleyes:

Funko, I'm just fulfilling my role as the "dude who posts equations".

I feel like its my duty...

Funko
26-05-2005, 16:18:13
Duty schmuty.

Venom
26-05-2005, 16:19:27
Ha ha! again.

Lurker the Second
26-05-2005, 16:21:46
Someone please explain to me why Funko's error makes Venom correct.

On second thought, never mind.

Funko
26-05-2005, 16:23:50
My error doesn't make him correct he was just correct.

protein
26-05-2005, 16:40:23
oh the humanity