Spring powered rocket?
Author
Discussion

puggit

Original Poster:

49,820 posts

278 months

Wednesday 30th November 2005
quotequote all
Sitting in a training course in the US, playing with my spring loaded biro. A thought crossed my mind...

Would it be possible to launch a rocket in to space using springs?

I hand it to the PH collective to discuss... I'm off to catch a flight home

dilbert

7,741 posts

261 months

Wednesday 30th November 2005
quotequote all
Nah, I reckon that the coefficient of boinginess wouldn't be big enough. I guess that you might get away with it if you used the boingiest substance known to man..... Bungeee rope!

HTH

zetec stuart

3 posts

251 months

Wednesday 30th November 2005
quotequote all
i'm sure if you had a big enough spring.....

Pigeon

18,535 posts

276 months

Wednesday 30th November 2005
quotequote all
Springs don't make a very good launch mechanism. It's difficult to avoid ending up with most of the energy still in the spring. You might stand a chance with a crossbow, though.

Balmoral Green

42,561 posts

278 months

Wednesday 30th November 2005
quotequote all
It wouldnt be a rocket though, it's called a rocket because it's powered by a rocket motor. If it was powered by a spring motor, then what you have is a spring.

puggit

Original Poster:

49,820 posts

278 months

Wednesday 30th November 2005
quotequote all
Balmoral Green said:
It wouldnt be a rocket though, it's called a rocket because it's powered by a rocket motor. If it was powered by a spring motor, then what you have is a spring.
Well it would still be a rocket if it needed rockets for changing direction in space, or deceleration rockets

>> Edited by puggit on Wednesday 30th November 19:17

JoolzB

3,549 posts

279 months

Wednesday 30th November 2005
quotequote all
It's a nice thought but I'd probably say no. The spring would have to be extremely long and that would mean it lost it's springiness due to the weight. It needs to be travelling at 11km/s or somein like that to break the earths grav force, try it again with your pen and see if it arrives home before you.

srebbe64

13,021 posts

267 months

Wednesday 30th November 2005
quotequote all
Sure - if the spring was 50 miles long with a space vehicle on top, it would do the trick.

Parrot of doom

23,075 posts

264 months

Wednesday 30th November 2005
quotequote all
The amount of energy needed to compress the spring would be more than the amount used as a chemical fuel.

rich 36

13,739 posts

296 months

Wednesday 30th November 2005
quotequote all
And what about the Headlights,
if youre' going really fast, say the speed of light/boinginess,
would they illuminate anything when switched on

Frik

13,690 posts

273 months

Wednesday 30th November 2005
quotequote all
rich 36 said:
And what about the Headlights,
if youre' going really fast, say the speed of light/boinginess,
would they illuminate anything when switched on
No.

This is a whole can of string theory we really don't want to get into again

gasblaster

27,584 posts

309 months

Wednesday 30th November 2005
quotequote all
By Jove I think PH has stumbled upon a way to protect the earth from that huge asteroid / comet deep impact thing! A giant spring, on a mobile platform, can be positioned at the impact site and BOING the asteroid back into space Not quite a rocket, but just as good!

would need that actor from the FLY and Holsten Pils ads to design the sping properly, of course, otherwise we're doomed

mybrainhurts

90,809 posts

285 months

Wednesday 30th November 2005
quotequote all
I've got this small nuclear device, and I need to deliver it up Blair's arse....

Any ideas....?

srebbe64

13,021 posts

267 months

Wednesday 30th November 2005
quotequote all
mybrainhurts said:
I've got this small nuclear device, and I need to deliver it up Blair's arse....

Any ideas....?

He's already got one, it's Cherie!

wizzpig

2,039 posts

258 months

Wednesday 30th November 2005
quotequote all
rich 36 said:
And what about the Headlights,
if youre' going really fast, say the speed of light/boinginess,
would they illuminate anything when switched on


Yes, but it would depend on your prospective and speed relative to the light coming from the source.

srebbe64

13,021 posts

267 months

Wednesday 30th November 2005
quotequote all
wizzpig said:
rich 36 said:
And what about the Headlights,
if youre' going really fast, say the speed of light/boinginess,
would they illuminate anything when switched on


Yes, but it would depend on your prospective and speed relative to the light coming from the source.

Indeed, light is the only constant in the universe. As such, the concept of time is the variable. However, if travelling away from the earth then the light from the headlights would appear much redder to us on earth, because the wavelengths would appear greater. If the space ship did a big loop and returned to earth 20 years later (earth time) at a speed close to the speed of light, the astonaut concerned, from our perspective, will not have aged much at all. However, he would be surprised how much we'd all aged.

wizzpig

2,039 posts

258 months

Thursday 1st December 2005
quotequote all
srebbe64 said:
wizzpig said:
rich 36 said:
And what about the Headlights,
if youre' going really fast, say the speed of light/boinginess,
would they illuminate anything when switched on


Yes, but it would depend on your prospective and speed relative to the light coming from the source.

Indeed, light is the only constant in the universe. As such, the concept of time is the variable. However, if travelling away from the earth then the light from the headlights would appear much redder to us on earth, because the wavelengths would appear greater. If the space ship did a big loop and returned to earth 20 years later (earth time) at a speed close to the speed of light, the astonaut concerned, from our perspective, will not have aged much at all. However, he would be surprised how much we'd all aged.

Absolutely

This red shift is known, if i'm correct, as the doppler effect. Sound waves have similar characteristics i.e when a plod car or ambulance is traveling toward you with it's siren on the pitch is higher than when it is travelling away from you.

deevlash

10,442 posts

267 months

Thursday 1st December 2005
quotequote all
slight thread hijack but i reckon a great way to launch spaceships would be to create a magnetic track underground in a huge tunnel. Make the tunnel a vacuum and fire the spaceship down it till its going darn fast then at the last minute have the tunnel ramp up to the surface and open the doors and wooooooosh up through the atmosphere without any rocket fuel! copyright deevlash

polus

4,343 posts

255 months

Thursday 1st December 2005
quotequote all
No I doubt it, An initial burst of energy to move a projectile into space would have to be huge!

Have you read/seen the research into using lazers?
Very interesting

wizzpig

2,039 posts

258 months

Thursday 1st December 2005
quotequote all
IIRC the escape velocity for this planet is something like 11 miles per second......
That is some chuffin elastic band!