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Jet powered flying motorcycle from the film MegaForce (1982) has been added as a related post - related requested by newtboy on that post.

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>> ^GenjiKilpatrick:

@WaterDweller & @radx
You do realize the plane had a small jet engine in it, right?
If the battery did fail [most likely rupturing/exploding], it could have damaged the engine triggering the explosion.

Yes, that's a very good hypothetical explanation. I would have thought the same, hadn't it been for the video explicitly showing the planting of the bomb, with him even saying so ("ich habe ein kleines bömbchen gebaut" -- "I have built a little bomb").

Very cool, and it's very real. Jet-powered RC planes aren't anything new: http://videosift.com/video/Mini-Concorde-Radio-controlled-model-jet

Heh... Kind of funny to open up a random clip while paying half attention, and realizing only about 20 seconds in that the language sounds awfully familiar. My own language - Icelandic.

[edit] a little searching turned up another video of some insane Icelander flying his jet powered model airplane - at speeds in excess of 304KM/h: http://agbjarn.blog.is/blog/agbjarn/entry/342375/

>> ^GeeSussFreeK:
>> ^potchi79:
So you start a pulse jet with a leaf blower?

Mostly yes, the idea behind most jets is to compress incoming air with fuel. No spark is needed as the compression causes heat. The problem is you need the air already moving to start. The same is true of turbofan engines of most jet airplanes. In my day they used electric motors to start the fan blade spinning. Once they are up to speed, they feed enough air fast enough into the combustion chambers to keep it going. A leave blower is a lot easier to add to a project then an electric motor. If you look up DIY jet engines in youtube, you will see it as the staple for home brew jet starters.
Jets are much more "simple" then combustion engines as they are mainly self sustaining when up to speed. They are very complex in other ways though, like how to not melt down under extreme heat and such. A flame out at low speed typically spells doom for a jet...engine restarts when careening downward is not as experience you want in life.
One thing I have never understood about a pulse jet is how to ramp your speed up. With a turbofan, you just up the fan speed or fan blade pitch...with a pulse just I have no idea. Add more fuel maybe? If that were the case, then the max speed would be dictated by the explosion maximum. If your explosion is to great, you risk vibration annihilation or destruction of your combustion chamber...or you spit the hot air out the back end before the pulse can bring it back for re-ignition? Or perhaps it has to do with pulse modulation and changing how long you wait till your open the valve. The longer you wait, the more thrust you get before the next cycle? Dunno, pulse jets were always more of a curiosity than an area of study.
Edit: Jets are very similar to diesel engine as there is no spark needed...all the heat is gained through compression. Hope that isn't TMI at this point


than

Though your knowledge of jets is impressive. Let's really try to stomp this sign of the internet generation out, shall we?! Who's with me!?

>> ^potchi79:
So you start a pulse jet with a leaf blower?


Mostly yes, the idea behind most jets is to compress incoming air with fuel. No spark is needed as the compression causes heat. The problem is you need the air already moving to start. The same is true of turbofan engines of most jet airplanes. In my day they used electric motors to start the fan blade spinning. Once they are up to speed, they feed enough air fast enough into the combustion chambers to keep it going. A leave blower is a lot easier to add to a project then an electric motor. If you look up DIY jet engines in youtube, you will see it as the staple for home brew jet starters.

Jets are much more "simple" than combustion engines as they are mainly self sustaining when up to speed. They are very complex in other ways though, like how to not melt down under extreme heat and such. A flame out at low speed typically spells doom for a jet...engine restarts when careening downward is not as experience you want in life.

One thing I have never understood about a pulse jet is how to ramp your speed up. With a turbofan, you just up the fan speed or fan blade pitch...with a pulse jet I have no idea. Add more fuel maybe? If that were the case, then the max speed would be dictated by the explosion maximum. If your explosion is to great, you risk vibration annihilation or destruction of your combustion chamber...or you spit the hot air out the back end before the pulse can bring it back for re-ignition? Or perhaps it has to do with pulse modulation and changing how long you wait till your open the valve. The longer you wait, the more thrust you get before the next cycle? Dunno, pulse jets were always more of a curiosity than an area of study.

Edit: Jets are very similar to diesel engine as there is no spark needed...all the heat is gained through compression. Hope that isn't TMI at this point

Your video, Jet-Powered Carousel, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

Those are very simple jet engines. No moving parts in those ones, and other pulse jets only need one valve. They made something very similar in the jet powered go cart episode of junk yard wars.

http://www.aardvark.co.nz/pjet/

For all your home brew pulse jet needs

Some asshole likes to buzz the SF Bay Bridge with a jet-powered F14 from time to time.. Scared me shitless first time I saw it.

>> ^Nithern:

Nithern, is your argument that "the faithful ill should go to doctors because some doctors are Christian?" Do you really want to run with that one?

And science is cold? Huh?!

Hope is an utterly useless concept. I could be falling from a 100 metre building and hopeful of a speedy recovery or some of god's attention for a moment. Or I could be falling from a 100 metre building and be in despair of my soon to be mangled dead body. Either emotion is pretty much useless. I'm almost certainly going to die. Yet, people have survived such falls. Sure, you can stick with your hope and maybe god will deliver you from almost certain death, but I sure as hell wouldn't mind some jet-powered rocket pants to Junior Birdman the hell out of here!

There are situations where believing you are going to die actually has a very bad impact on your condition. Scientists (and others) are well aware of this. A really interesting off-shoot of this is the nocebo response. You might find it interesting.

You're judging without knowing what the hell is going on in the video.


Dammit, once again my decision not to learn Russian comes back to haunt me. It's too bad, I really would like to know exactly where "pilot skill" comes into play in riding down a runway in a jet powered sled.

upvote for the jet powered octopus alone