Science Projects and Homework Need help with a science project or some homework? Post a request here.


Advertisement (please log in or register to remove this ad)
Reply
 
LinkBack Thread Tools
  #11 (permalink)  
Old 12-08-2005, 05:45 PM
Questioning
 
Join Date: Dec 2005
Posts: 157
qumf is on a distinguished road
Re: the jet propulsion with closed combustion type

Quote:
Originally Posted by goku
i think they already use what you are talking about, they call it a rocket engine
if that's what you're talking about.
the other engine you could be talking about is the german, so called because of the sound it males, buzz bomb engine that was used in WW2

i'm thinking jet engines are about as efficient as they can get, sure the compresser fan is heavy but it is doing two fuctions. it is compressing and acting as a propeller.
The commen rocket engine isn't as I new designed. As I know,the common rocket engine's combustion is steady, mine is discontinuous.

the compressor has two function: compressing,as a propeller. If we can find another one instead of it and have same function at whole engine, We should do.
Reply With Quote
Advertisement
  #12 (permalink)  
Old 12-08-2005, 09:25 PM
Creating
Points: 118,853, Level: 100 Points: 118,853, Level: 100 Points: 118,853, Level: 100
Activity: 45% Activity: 45% Activity: 45%
Hypography Staff Member
Administrator
Editor
 
Join Date: May 2005
Location: Silver Spring, MD, USA
Posts: 4,306
CraigD has a reputation beyond reputeCraigD has a reputation beyond reputeCraigD has a reputation beyond reputeCraigD has a reputation beyond reputeCraigD has a reputation beyond reputeCraigD has a reputation beyond reputeCraigD has a reputation beyond reputeCraigD has a reputation beyond reputeCraigD has a reputation beyond reputeCraigD has a reputation beyond reputeCraigD has a reputation beyond repute
Thumbs up Promising

Quote:
Originally Posted by goku
i think they already use what you are talking about, they call it a rocket engine … i'm thinking jet engines are about as efficient as they can get, sure the compresser fan is heavy but it is doing two fuctions. it is compressing and acting as a propeller.
I agree – qumf’s idea seems a form of rocket, since the system that supplies oxidant – air in this case – isn’t, from what I can gather, meant to provide much if any propulsion.

It also appears to share features of pistons engine and pulse jets – the engine used in the V-1 “buzz bomb” goku mentions. This is an interesting, promising design, because it suggests that the engine’s fuel-air ratio could be carefully regulated, and the combustion pattern made very clean and efficient. While it might be less efficient than a conventional, high-bypass turbofan jet engine, the design might prove much cleaner, especially if a natural gas or hydrogen is used as fuel.

Other advantage that come to mind: unlike most turbofan engines, the design could work well at super-sonic speeds; the flexibility in placing the intake lends itself to the flexible placement of exhausts, making it promising for crafts like the Moller Skycar. Despite popular enthusiasm this vehicle, it continues to be plagued by such severe technical problems that I seriously doubt that the current design will every fly – doubts apparently shared by the US SEC, which recently filed this lawsuit for fraud agains Moller.

I’m interested in seeing some preliminary numeric estimates of the proposed engine’s power, weight, and efficiency, and hope that qumf can provide them, as well as sketches, soon.
Reply With Quote
  #13 (permalink)  
Old 12-08-2005, 10:25 PM
Questioning
 
Join Date: Dec 2005
Posts: 157
qumf is on a distinguished road
Re: Promising

I draw in a hurry, sorry, I will explain soon.
You can see that patent ZL 95237295.9 . Those pictures are good,but it is old thoght about the jet engine.You can refer it.

Last edited by qumf; 01-24-2007 at 04:45 AM.
Reply With Quote
  #14 (permalink)  
Old 12-08-2005, 10:29 PM
Questioning
 
Join Date: Dec 2005
Posts: 157
qumf is on a distinguished road
Help!

who can tell me how to attach picture from my picture?

Qumf
Reply With Quote
  #15 (permalink)  
Old 12-08-2005, 10:32 PM
GAHD's Avatar
Creating
Points: 68,661, Level: 100 Points: 68,661, Level: 100 Points: 68,661, Level: 100
Activity: 1% Activity: 1% Activity: 1%
Hypography Staff Member
Administrator
 
Join Date: Dec 2003
Location: Winterpeg, Manitoba
Posts: 1,882
GAHD is a name known to allGAHD is a name known to allGAHD is a name known to allGAHD is a name known to allGAHD is a name known to allGAHD is a name known to allGAHD is a name known to all
Send a message via ICQ to GAHD Send a message via AIM to GAHD Send a message via MSN to GAHD Send a message via Yahoo to GAHD
Re: Promising

Don't count your chickens before they're hatched fellas, qumf might surprise us all.

@qumf: I was just referring to the way the air moves coming out aof a jet; it spins. if the air was forced into a straight path there would be an increase in the thrust provided. check it out when you build your prototype: run smoke in th intake and watch it spin as it comes out the rear.
__________________
Sometimes a Hypography Forum Administrator



"With a big enough engine, even a brick will fly." -Law of Aerospace
Reply With Quote
  #16 (permalink)  
Old 12-08-2005, 10:33 PM
GAHD's Avatar
Creating
Points: 68,661, Level: 100 Points: 68,661, Level: 100 Points: 68,661, Level: 100
Activity: 1% Activity: 1% Activity: 1%
Hypography Staff Member
Administrator
 
Join Date: Dec 2003
Location: Winterpeg, Manitoba
Posts: 1,882
GAHD is a name known to allGAHD is a name known to allGAHD is a name known to allGAHD is a name known to allGAHD is a name known to allGAHD is a name known to allGAHD is a name known to all
Send a message via ICQ to GAHD Send a message via AIM to GAHD Send a message via MSN to GAHD Send a message via Yahoo to GAHD
Re: Promising

when you reply, click the 'go advanced' button below the typing box. Scroll down untill you see a button that says 'manage attachments', use this button to upload your files.
__________________
Sometimes a Hypography Forum Administrator



"With a big enough engine, even a brick will fly." -Law of Aerospace
Reply With Quote
  #17 (permalink)  
Old 12-08-2005, 10:43 PM
Questioning
 
Join Date: Dec 2005
Posts: 157
qumf is on a distinguished road
Re: Promising

Quote:
Originally Posted by GAHD
when you reply, click the 'go advanced' button below the typing box. Scroll down untill you see a button that says 'manage attachments', use this button to upload your files.
I can't find the button" 'go advanced' button below the typing box. what shape is it?
Reply With Quote
  #18 (permalink)  
Old 12-08-2005, 10:51 PM
Questioning
 
Join Date: Dec 2005
Posts: 157
qumf is on a distinguished road
Re: Promising

I draw in a hurry, sorry, I will explain soon.
You can see that patent ZL 95237295.9 . Those pictures are good,but it is old thoght about the jet engine.You can refer it.

Reply With Quote
  #19 (permalink)  
Old 12-08-2005, 11:15 PM
GAHD's Avatar
Creating
Points: 68,661, Level: 100 Points: 68,661, Level: 100 Points: 68,661, Level: 100
Activity: 1% Activity: 1% Activity: 1%
Hypography Staff Member
Administrator
 
Join Date: Dec 2003
Location: Winterpeg, Manitoba
Posts: 1,882
GAHD is a name known to allGAHD is a name known to allGAHD is a name known to allGAHD is a name known to allGAHD is a name known to allGAHD is a name known to allGAHD is a name known to all
Send a message via ICQ to GAHD Send a message via AIM to GAHD Send a message via MSN to GAHD Send a message via Yahoo to GAHD
Re: Promising

your link doesn't work, sorry to say.

but this might help you attach:
Attached Thumbnails
the-jet-propulsion-closed-combustion-type-showing.jpg  the-jet-propulsion-closed-combustion-type-showing2.jpg  
__________________
Sometimes a Hypography Forum Administrator



"With a big enough engine, even a brick will fly." -Law of Aerospace
Reply With Quote
  #20 (permalink)  
Old 12-08-2005, 11:38 PM
Questioning
 
Join Date: Dec 2005
Posts: 157
qumf is on a distinguished road
Re: Promising

Quote:
Originally Posted by GAHD
your link doesn't work, sorry to say.

but this might help you attach:
thank you very much.
I see the reason is that I can't active Quick Reply Box. every time I used other ways, "QUOTE" ,"NEW REPLY".
how to active it.
Reply With Quote
Reply

Bookmarks
Advertisement


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Project Home 2010 scientific research- physics and magnetism projecthome2010 Websites 1 12-07-2005
Naked carbon/oxygen stars linked to gamma-ray bursts C1ay Astronomy news 0 05-30-2005

» Advertisement
» Latest Science News
Powering the planet
imageNSF-funded Chemical Bonding Center project provides a new approach for harnessing the sun's energy
Read » | 0 comments

DNA Barcodes: Are They Always Accurate?
imageBrigham Young University (BYU) study questions the reliability iof some results.
Read » | 0 comments

Make Contact: Ask an Astronaut on the Space Station a Question
imageAstronaut Greg Chamitoff, aboard the International Space Station 220 miles above Earth, is ready to take your questions.
Read » | 0 comments
» Current Poll
Do U text?
No - 25.00%
6 Votes
Yes; < 6 messages/day - 50.00%
12 Votes
Yes; 6-15 messages/day - 12.50%
3 Votes
Yes; 16 to 43 messages/day - 8.33%
2 Votes
Yes; > 43 messages/day - 4.17%
1 Vote
What? - 0%
0 Votes
Total Votes: 24
You may not vote on this poll.
» Random Social Groups
Hackers
8 members | 0 pictures
Star Trek
3 members | 0 pictures
Guitarists
4 members | 0 pictures
Aquarium Keeping
4 members | 13 pictures
Google Lunar X-Prize: Team Hypography
3 members | 0 pictures
» View All Groups
Advertisement

All times are GMT -8. The time now is 05:39 PM.


Powered by vBulletin® Version 3.7.2
Copyright ©2000 - 2008, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.2.0
Copyright © 2000-2008 Hypography
Part of the Hypography - Science for Everyone Network

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67