Boat Design Forums  |  Boat Design Directory  |  Boat Design Gallery  |  Boat Design Book Store  |  Thanks to Our Site Sponsors

Go Back   Boat Design Forums > Community > Open Discussion: All Things Boats & Boating
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 01-23-2012, 09:37 AM
lewisboats's Avatar
lewisboats lewisboats is offline
Obsessed Member
 
Join Date: Oct 2002
Rep: 1248 Posts: 1,840
Location: Iowa
Now THAT'S a Jetpack!!!

http://www.wimp.com/jetmanflight/
__________________
Steve Lewis

Lewisboatworks
http://angelfire.com/ego/lewisboatworks
Reply With Quote
  #2  
Old 01-23-2012, 09:59 AM
Leo Lazauskas's Avatar
Leo Lazauskas Leo Lazauskas is offline
Senior Member
 
Join Date: Jan 2002
Rep: 1816 Posts: 1,422
Location: Adelaide, South Australia
Quote:
Originally Posted by lewisboats View Post
I'm now convinced that all modern inventors were inspired by the Coyote
and Roadrunner cartoons.
Reply With Quote
  #3  
Old 01-23-2012, 03:38 PM
mydauphin mydauphin is offline
Senior Member
 
Join Date: Apr 2007
Rep: 501 Posts: 1,760
Location: Florida
Beep! Beep!
Reply With Quote
  #4  
Old 01-23-2012, 03:41 PM
Leo Lazauskas's Avatar
Leo Lazauskas Leo Lazauskas is offline
Senior Member
 
Join Date: Jan 2002
Rep: 1816 Posts: 1,422
Location: Adelaide, South Australia
Quote:
Originally Posted by mydauphin View Post
Beep! Beep!
It's time to lawyer up!
http://www.torinfo.com/justforlaughs/coyote_v_acme.html
Reply With Quote
  #5  
Old 01-23-2012, 04:11 PM
WestVanHan's Avatar
WestVanHan WestVanHan is offline
Not a "Senior" Member
 
Join Date: Aug 2009
Rep: 413 Posts: 653
Location: Vancouver
I bought a model multicopter about 7 years ago,and was surprised at the amount it could lift.

Then I got a much larger motor and suitable prop,and measured the lift...then i calculated with an amount of motors etc I could go for a flight.
Then I thought it may not be such a good idea,but was going to build it even to hover over water or stay at low heights.

Was talked out of it by the girlfriend at the time..

Then some German guys did it last fall

http://www.youtube.com/watch?v=L75ESD9PBOw
Attached Thumbnails
Now THAT'S a Jetpack!!!-e-volo_imgp2424-580x385.jpg  
__________________
I think it's bad luck to be superstitious.
Reply With Quote
  #6  
Old 01-23-2012, 04:21 PM
mydauphin mydauphin is offline
Senior Member
 
Join Date: Apr 2007
Rep: 501 Posts: 1,760
Location: Florida
Lol

Quote:
Originally Posted by Leo Lazauskas View Post
LOL, The Jet pack guy should have called his company ACME.
Reply With Quote
  #7  
Old 01-23-2012, 06:13 PM
BPL BPL is offline
Senior Member
 
Join Date: Dec 2011
Rep: 115 Posts: 154
Location: Midwest US
No cables
Reply With Quote
  #8  
Old 01-23-2012, 06:26 PM
mydauphin mydauphin is offline
Senior Member
 
Join Date: Apr 2007
Rep: 501 Posts: 1,760
Location: Florida
Scale

Quote:
Originally Posted by WestVanHan View Post
I bought a model multicopter about 7 years ago,and was surprised at the amount it could lift.

Then I got a much larger motor and suitable prop,and measured the lift...then i calculated with an amount of motors etc I could go for a flight.
Then I thought it may not be such a good idea,but was going to build it even to hover over water or stay at low heights.

Was talked out of it by the girlfriend at the time..
===================
Air pressures/lift etc... don't scale in a linear form, neither do engine weights to horsepower ratios. That said stability is the big problem. Your girlfriend probably saved your life...
Reply With Quote
  #9  
Old 01-24-2012, 04:34 PM
BPL BPL is offline
Senior Member
 
Join Date: Dec 2011
Rep: 115 Posts: 154
Location: Midwest US
Quote:
Originally Posted by WestVanHan View Post
I bought a model multicopter about 7 years ago,and was surprised at the amount it could lift.

Then I got a much larger motor and suitable prop,and measured the lift...then i calculated with an amount of motors etc I could go for a flight.
Then I thought it may not be such a good idea,but was going to build it even to hover over water or stay at low heights.

Was talked out of it by the girlfriend at the time..

Then some German guys did it last fall

http://www.youtube.com/watch?v=L75ESD9PBOw
What kind of computer control is required to maintain stability?

The sixties have arrived!
Sixties view of the underwater future
Reply With Quote
  #10  
Old 01-24-2012, 09:10 PM
WestVanHan's Avatar
WestVanHan WestVanHan is offline
Not a "Senior" Member
 
Join Date: Aug 2009
Rep: 413 Posts: 653
Location: Vancouver
Dauphin: I don't think she saved my life,all I wanted to do was lift off a couple feet.
Had found some helicopter data,pored over it and made estimations based upon that-if it hadn't lifted off I'd have added more motors.
And ducted them.
IIRC it needed 50 or 55 kw..I planned to not use strictly batteries.

Stabilization,I looked into model gyroscopic multicopter electronics,and decided that since I didn't want to spin, or even travel around that a simple dihedral would work.

I was too busy to build it anyways,and didn't want to fly around the country,just to float around a little.
__________________
I think it's bad luck to be superstitious.
Reply With Quote
  #11  
Old 02-27-2012, 09:17 AM
lewisboats's Avatar
lewisboats lewisboats is offline
Obsessed Member
 
Join Date: Oct 2002
Rep: 1248 Posts: 1,840
Location: Iowa
Last night's Top Gear (Original UK) featured a race between this and a Skoda rally car...


Car lost of course (it usually does) but not by much.

Race started with Chopper lift off and ended with Parachute landing. Pretty neat stuff. I think I would have to get a 'Nad transplant to dare flying in one but it is pretty cool to watch.
__________________
Steve Lewis

Lewisboatworks
http://angelfire.com/ego/lewisboatworks
Reply With Quote
  #12  
Old 02-27-2012, 01:45 PM
mydauphin mydauphin is offline
Senior Member
 
Join Date: Apr 2007
Rep: 501 Posts: 1,760
Location: Florida
I have seen a couple of unedited videos of some of the flights, it doesn't look all that stable, kind of like strapping a rocket on your pack. It doesn't provide a lot of lift, it needs a lot of speed to fly. Basically it is falling down and jets just postpone inevitable.
Reply With Quote
  #13  
Old 02-27-2012, 02:22 PM
Submarine Tom's Avatar
Submarine Tom Submarine Tom is offline
Mariner
 
Join Date: Aug 2008
Rep: 937 Posts: 1,938
Location: North America (not USA and not Mexico but, below the 49th parallel, and on the Pacific coast)
He's a surprisingly level headed guy. I've seen him about eight times since he started this project.

More like strapping FOUR rockets on your pack!

-Tom
Reply With Quote
Reply



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes



All times are GMT -5. The time now is 07:33 PM.


Powered by: vBulletin Copyright ©2000 - 2012, Jelsoft Enterprises Ltd.
Web Site Design and Content Copyright ©1999 - 2012 Boat Design Net