ADVrider

Go Back   ADVrider > Fluff > Shiny things
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Rating: Thread Rating: 254 votes, 4.96 average. Display Modes
Old 02-19-2012, 11:05 AM   #2671
gbranham
Double eye
 
gbranham's Avatar
 
Joined: May 2004
Location: Portland OR USA
Oddometer: 999
Quote:
Originally Posted by Klay View Post
That's why the main rotor is slowed down, not why the tractor propellors are outboard instead of on centerline.
I took his question as "What's with the props?" not "What's with the prop location?" As far as where these things ended up this is just a tragedy waiting to happen while this thing is on the ground. I understand they've installed clutches to disengage them from the drive train with engines running but when the shit hits the fan.....lol Anyway, ingress and egress from the cabin area seems to be restricted. I just think this is an impractical design and unnecessarily complicted mechanically.
__________________
Mista Kozzo sent me.
gbranham is offline   Reply With Quote
Old 02-19-2012, 11:12 AM   #2672
EvilGenius OP
1.5 Finger Discount
 
EvilGenius's Avatar
 
Joined: Apr 2007
Location: DFW, Texas
Oddometer: 20,308
Quote:
Originally Posted by gbranham View Post
I took his question as "What's with the props?" not "What's with the prop location?" As far as where these things ended up this is just a tragedy waiting to happen while this thing is on the ground. I understand they've installed clutches to disengage them from the drive train with engines running but when the shit hits the fan.....lol Anyway, ingress and egress from the cabin area seems to be restricted. I just think this is an impractical design and unnecessarily complicted mechanically.
If no one has figured it out at this point, the X3 is not mean to go into production. It never was, they're just using it as a testbed for different concepts.
__________________
"Try turning that burn into torque. Then we're getting somewhere. Riding the potato to work seems quite impractical." - anotherguy

"Never bring a Nerf gun to a shovel fight." - My Brother
EvilGenius is offline   Reply With Quote
Old 02-19-2012, 04:12 PM   #2673
Beach40
Banned
 
Beach40's Avatar
 
Joined: Sep 2006
Location: Newport, Sydney, Australia
Oddometer: 2,975
Quote:
Originally Posted by EvilGenius View Post
If no one has figured it out at this point, the X3 is not mean to go into production. It never was, they're just using it as a testbed for different concepts.
Thanks for the explanations. Very helpful.

I was wondering if this would actually be a production aircraft. So that brings me to the next question - what sort of configurations could we get from this concept?

It seems theres a limit on where extra props could be located, along with the added complexity, etc.
Beach40 is offline   Reply With Quote
Old 02-19-2012, 04:49 PM   #2674
EvilGenius OP
1.5 Finger Discount
 
EvilGenius's Avatar
 
Joined: Apr 2007
Location: DFW, Texas
Oddometer: 20,308
Quote:
Originally Posted by Beach40 View Post
Thanks for the explanations. Very helpful.

I was wondering if this would actually be a production aircraft. So that brings me to the next question - what sort of configurations could we get from this concept?

It seems theres a limit on where extra props could be located, along with the added complexity, etc.
I honestly dont know, haven't heard a whole lot about it. Just that theyre trying out some stuff with it. Dunno what exactly they're aiming for.
__________________
"Try turning that burn into torque. Then we're getting somewhere. Riding the potato to work seems quite impractical." - anotherguy

"Never bring a Nerf gun to a shovel fight." - My Brother
EvilGenius is offline   Reply With Quote
Old 02-19-2012, 05:02 PM   #2675
Lornce
Lost In Place
 
Lornce's Avatar
 
Joined: Aug 2003
Location: Way Out There.
Oddometer: 17,514
Quote:
Originally Posted by EvilGenius View Post
I honestly dont know, haven't heard a whole lot about it. Just that theyre trying out some stuff with it. Dunno what exactly they're aiming for.
Trying to maximise the benefits of vtol (vertical take off and landing: think small airports or non-specialised landing sites) with fixed wing flight efficiencies.

Basically, conventional helicopter max v's are limited by a rotor that does all the heavy lifting (har har) and thrusting. The props and stub wings permit a work-around (lower rotor speeds) to achieve higher v's.

In flight it's not entirely unlike those wierd-ass gyro copters the nutty eaa'ers have been playing with for eons. Though gyros can't do vtol.

Lornce is online now   Reply With Quote
Old 02-19-2012, 08:42 PM   #2676
Beach40
Banned
 
Beach40's Avatar
 
Joined: Sep 2006
Location: Newport, Sydney, Australia
Oddometer: 2,975
Quote:
Originally Posted by Lornce View Post
Trying to maximise the benefits of vtol (vertical take off and landing: think small airports or non-specialised landing sites) with fixed wing flight efficiencies.

Basically, conventional helicopter max v's are limited by a rotor that does all the heavy lifting (har har) and thrusting. The props and stub wings permit a work-around (lower rotor speeds) to achieve higher v's.

In flight it's not entirely unlike those wierd-ass gyro copters the nutty eaa'ers have been playing with for eons. Though gyros can't do vtol.
So if I'm following along correctly, it would seem for a medium to large-ish aircraft, a pusher prop might give some desired results?

Hasn't this been done before? Or, is it like a lot of things that faster/smaller computers and other technological advances make this worth revisiting?

Or... maybe a bunch of engineers got bored and suddenly someone decided it was a good idea and money flowed so they're running with it while they can?
Beach40 is offline   Reply With Quote
Old 02-20-2012, 04:39 AM   #2677
VictorBravoMikeIndia
Low Altitude Flyer
 
VictorBravoMikeIndia's Avatar
 
Joined: Jul 2008
Location: Sarf Ingerland
Oddometer: 134
Hey.......this is all old hat.
We ( the Brits ) were doing all this stuff in the nineteen fifties !!!!




Video here.......http://www.liveleak.com/view?i=f04_1279035546
VictorBravoMikeIndia is offline   Reply With Quote
Old 02-20-2012, 11:19 AM   #2678
Flying-D
Just Passing Through
 
Flying-D's Avatar
 
Joined: Mar 2010
Location: Cape Girardeau, MO
Oddometer: 2,315
Quote:
Originally Posted by Lornce View Post

We've got three of the Magni gyro's being bolted together on the field here as we speak. They also have a completed one that they give dual in (counts as rotor time). Rent is $70 an hour wet. I've been kicking it around myself.
__________________
It's really all just stuff...and in the end, none of it means shit.
Flying-D is offline   Reply With Quote
Old 02-20-2012, 06:35 PM   #2679
Klay
dreaming adventurer
 
Klay's Avatar
 
Joined: Nov 2005
Location: right here on my thermarest
Oddometer: 98,312
Quote:
Originally Posted by VictorBravoMikeIndia View Post
Hey.......this is all old hat.
We ( the Brits ) were doing all this stuff in the nineteen fifties !!!!




Video here.......http://www.liveleak.com/view?i=f04_1279035546

I don't understand the engineering reasons behind not pursuing this approach.
Klay is offline   Reply With Quote
Old 02-20-2012, 06:40 PM   #2680
dorkpunch
Oops...
 
dorkpunch's Avatar
 
Joined: Aug 2006
Location: Blackfoot, ID
Oddometer: 4,959
Quote:
Originally Posted by Lornce View Post
. Though gyros can't do vtol.

I thought there were some versions that could "leap"- the rotor had a shaft from the motor so it could be spun up to speed and once spun up, you could "pop the clutch" and get it to jump off the ground long enough to get forward motion. Not true vertical take off... But I'm also pretty sure you CAN land them vertically, specially if you have a headwind.

__________________
http://www.mobilemrt.com http://www.dorkpunch.com

"I've been going to this high school for SEVEN YEARS. I'm no dummy!"
-Charles De Mar.
dorkpunch is offline   Reply With Quote
Old 02-20-2012, 06:53 PM   #2681
EvilGenius OP
1.5 Finger Discount
 
EvilGenius's Avatar
 
Joined: Apr 2007
Location: DFW, Texas
Oddometer: 20,308
Quote:
Originally Posted by Klay View Post
I don't understand the engineering reasons behind not pursuing this approach.
Just makes cents donut?
__________________
"Try turning that burn into torque. Then we're getting somewhere. Riding the potato to work seems quite impractical." - anotherguy

"Never bring a Nerf gun to a shovel fight." - My Brother
EvilGenius is offline   Reply With Quote
Old 02-20-2012, 09:35 PM   #2682
Lornce
Lost In Place
 
Lornce's Avatar
 
Joined: Aug 2003
Location: Way Out There.
Oddometer: 17,514
Quote:
Originally Posted by Klay View Post
I don't understand the engineering reasons behind not pursuing this approach.
No, you don't.
Lornce is online now   Reply With Quote
Old 02-20-2012, 09:36 PM   #2683
Klay
dreaming adventurer
 
Klay's Avatar
 
Joined: Nov 2005
Location: right here on my thermarest
Oddometer: 98,312
Quote:
Originally Posted by Lornce View Post
No, you don't.
And neither do you, evidently.
Klay is offline   Reply With Quote
Old 02-20-2012, 09:38 PM   #2684
Lornce
Lost In Place
 
Lornce's Avatar
 
Joined: Aug 2003
Location: Way Out There.
Oddometer: 17,514
Quote:
Originally Posted by dorkpunch View Post
Not true vertical take off... But I'm also pretty sure you CAN land them vertically, specially if you have a headwind.

The landings are more of a cross between a flair and an auto-rotation.

It's not the controlled hover a conventional vtol helicopter uses to land.
Lornce is online now   Reply With Quote
Old 02-20-2012, 09:45 PM   #2685
Lornce
Lost In Place
 
Lornce's Avatar
 
Joined: Aug 2003
Location: Way Out There.
Oddometer: 17,514
Quote:
Originally Posted by Klay View Post
And neither do you, evidently.
Forsooth.

Lornce is online now   Reply With Quote
Reply

Share

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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 On

Forum Jump


Times are GMT -7.   It's 11:02 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014