Go Back  PPRuNe Forums > PPRuNe Worldwide > The Pacific: General Aviation & Questions
Reload this Page >

TV of Hornet behind Hercules - Wake Turbulence?

Wikiposts
Search
The Pacific: General Aviation & Questions The place for students, instructors and charter guys in Oz, NZ and the rest of Oceania.

TV of Hornet behind Hercules - Wake Turbulence?

Thread Tools
 
Search this Thread
 
Old 20th Mar 2007, 12:31
  #21 (permalink)  
 
Join Date: Oct 2006
Location: ...
Posts: 341
Likes: 0
Received 0 Likes on 0 Posts
I think aspect ratio and weight have a greater effect on the magnitude of the vortices.

As for
Or do you mean that the vortices' from the tail could have the same effect
I presume you're referring to the horizontal stabiliser? But if the aircraft is in balance, wouldn't the elevator deflection be minimal? Since it is not a lifting surface, I'd guess the tendency to towards vortex-creatin due to lift would be almost nil.

What are you really asking? You're confusing me with your grammar. Are you a pilot?
ScottyDoo is offline  
Old 20th Mar 2007, 12:49
  #22 (permalink)  

Evertonian
 
Join Date: May 2000
Location: #3117# Ppruner of the Year Nominee 2005
Posts: 12,502
Received 106 Likes on 60 Posts
Are you a pilot?
WELL! There's no need to be insulting about it!!!

I actually meant the stabilisers but, seeing you are saying that its all to do with the lifting surfaces (if I'm reading you right?) then I think I have my answer.
Buster Hyman is offline  
Old 20th Mar 2007, 13:38
  #23 (permalink)  
 
Join Date: Oct 2006
Location: ...
Posts: 341
Likes: 0
Received 0 Likes on 0 Posts
I'm glad. Any more questions and my ignorance and BS may have been exposed, if it wasn't already.

I still maintain these elitist knucks should spend less time burning kero carelessly for no reason other than the pure, unabounded joy of it and more time contributing somehow to our society.

We can only hope he has some really ****ty secondary duties...
ScottyDoo is offline  
Old 20th Mar 2007, 13:50
  #24 (permalink)  
 
Join Date: Aug 2003
Location: Sale, Australia
Age: 80
Posts: 3,832
Likes: 0
Received 0 Likes on 0 Posts
I presume you're referring to the horizontal stabiliser? But if the aircraft is in balance, wouldn't the elevator deflection be minimal? Since it is not a lifting surface
Aerodynamics 101 - Purpose of horizontal stab/elevator
Nah, never mind, I'll go proon the hedge.
Brian Abraham is offline  
Old 22nd Mar 2007, 02:35
  #25 (permalink)  
 
Join Date: Sep 2000
Location: Sydney, Australia
Posts: 108
Likes: 0
Received 0 Likes on 0 Posts
Buster - good question. And I'm sure you know the purpose of the horizontal stab, so thought the flaming was a bit unnecessary!

Short answer is yes - there's a whole lot of "mess" coming off the vertical and horizontal stabs. The way to stay out of it is to stay below the plane (geometry term, used deliberately ) of the tail-plane!

As with the wingtip vortices, the wake turb behind the fuselage / stab sinks at a relatively low rate, so you can get in behind without a problem. That's why line-astern formations always have a vertical difference between the lead and wing aircraft, with the wing sitting low.

In fact, in some types, that's how you pick the vertical spacing in close line astern. In the Pig, you're in the correct vertical position in line astern when you can just feel the "burble" of turbulence through the stick. Get too high and it gets rapidly stronger and can eventually spit you out if you're too ham fisted about it.

Same principle when tanking from a centreline boom - stay low enough to be out of the wake. get too high and the boom operator will cut you loose (due also to potential boom damage, but I won't bother with that here.)
Hope that helps.

ScottyDoo - nice wind up mate. Knucks "contributing to society"? Perhaps by pumping up sales of hair gel and raybans?

As they say - "fighter pilots make movies. Strike pilots make history"

Anyway - get over it. It's called PR, and as I'm sure you know it is about generating publicity for 1) Avalon specifically and 2) defence generally.
It IS part of the job.
Swingwing is offline  
Old 22nd Mar 2007, 02:45
  #26 (permalink)  
 
Join Date: Jul 2003
Location: Wherever I Lay my Hat...
Posts: 295
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Buster Hyman
the vortices that have a significant effect on the trailing aircraft would be proportional to the size/area of the wing?
From memory BH, vortices are proportional to the weight of the aircraft creating them, rather than the size/area of the lifting surface.
kiwiblue is offline  
Old 22nd Mar 2007, 20:36
  #27 (permalink)  
 
Join Date: Nov 2006
Location: sydney
Posts: 15
Likes: 0
Received 0 Likes on 0 Posts
ScottyDoo

"I still maintain these elitist knucks should spend less time burning kero carelessly for no reason other than the pure, unabounded joy of it and more time contributing somehow to our society.

We can only hope he has some really ****ty secondary duties..."

ScottyDoo,
I wouldn't think that tooling around at half pace in close formation with a herc is one of the more 'joy'-ful things you could do in a hornet.

Sounds either like a good windup or you've got a big chip on your shoulder. Did some mean-spirited knuck roll in on a girl you were trying to impress one time? At band camp. Please do tell.
señor_jones is offline  
Old 22nd Mar 2007, 21:14
  #28 (permalink)  
 
Join Date: Oct 2006
Location: ...
Posts: 341
Likes: 0
Received 0 Likes on 0 Posts
Si senor. You obviously don't get irony in meh-hico, eh gringo?

It's called irony. I could disassemble it in an attempt to explain to you how I say one thing when really I mean another but by then the moment has probably passed.

Rest assured, I have no problem with knucks in Hornets burning kero or "doing" aeros or wasting hours or pulling their puds.

Better the money is spent on something satisfying like that than frittered away on an orphange or the like...

Last edited by ScottyDoo; 23rd Mar 2007 at 05:55.
ScottyDoo is offline  
Old 23rd Mar 2007, 01:02
  #29 (permalink)  
 
Join Date: Nov 2006
Location: sydney
Posts: 15
Likes: 0
Received 0 Likes on 0 Posts
ScottyDoo,
Thanks for the impromptu grammar lesson. A convenient tool when one is not sufficiently informed to have an actual opinion either way. Great example.

Given you find it appropriate to change my quote to reflect your personal experience, please share the rest of the story with us so that we might all avoid the humiliation of having some knuck walk out of a bar, up to his second knuckle in some girl you thought you had a chance with 3 minutes earlier.
señor_jones is offline  
Old 23rd Mar 2007, 01:27
  #30 (permalink)  
 
Join Date: Apr 2002
Location: Alice Springs
Posts: 1,744
Likes: 0
Received 0 Likes on 0 Posts
????

Some very mature, friendly people on here, really adding to a valuable discussion?????.
bushy is offline  
Old 23rd Mar 2007, 02:36
  #31 (permalink)  
 
Join Date: Aug 2003
Location: Sale, Australia
Age: 80
Posts: 3,832
Likes: 0
Received 0 Likes on 0 Posts
Scotty, An honest question in order to how much weight to give your posts. What are your aviation credentials, the profile is a little slim on specifics.
Brian Abraham is offline  
Old 23rd Mar 2007, 03:00
  #32 (permalink)  
 
Join Date: Jan 2001
Location: North Queensland, Australia
Posts: 2,980
Received 14 Likes on 7 Posts
He doesn't mind a bit of **** stirring, anyway - amusing for a little while, then not.
Arm out the window is offline  
Old 23rd Mar 2007, 06:00
  #33 (permalink)  
 
Join Date: Oct 2006
Location: ...
Posts: 341
Likes: 0
Received 0 Likes on 0 Posts
Sorry senor, that was a phrase I picked up in the RAAF. I thought I was talking to a fellow and you might notice it but I guess not.


Note to self: Use the wink-smiley next time you want to make a friendly jibe at the RAAF....
ScottyDoo is offline  

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 Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.