Go Back  PPRuNe Forums > Flight Deck Forums > Tech Log
Reload this Page >

Another load factor question

Tech Log The very best in practical technical discussion on the web

Another load factor question

Old 30th Jun 2006, 22:00
  #1 (permalink)  
Thread Starter
 
Join Date: Mar 2001
Location: Toronto, Ont, Canada
Posts: 223
Likes: 0
Received 0 Likes on 0 Posts
Another load factor question

Crusing S&L in your spamcan @ 100kts.

Some abrupt backpressure and one second later you've gained ~60 feet.

Is that ~2g's ? (9.8 m/s /s (~30ft/sec/sec))

If so, if you gained 90 feet after 2 seconds, would that also be 2g's ?

Mike
mstram is offline  
Old 30th Jun 2006, 22:08
  #2 (permalink)  
Per Ardua ad Astraeus
 
Join Date: Mar 2000
Location: UK
Posts: 18,579
Likes: 0
Received 0 Likes on 0 Posts
s=1/2 at^2

60 = 1/2 x a x 1^2

a=120 / 1

a=120 fpsps

a=4g (probably broken spamcan )

After 2 seconds,

a= 180 / 4

a=45 fpsps

a=1.5 g

Bedtime now!
BOAC is offline  
Old 30th Jun 2006, 23:53
  #3 (permalink)  
Thread Starter
 
Join Date: Mar 2001
Location: Toronto, Ont, Canada
Posts: 223
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by BOAC
s=1/2 at^2

60 = 1/2 x a x 1^2

a=120 / 1
a=120 fpsps
a=4g (probably broken spamcan )
After 2 seconds,
a= 180 / 4
a=45 fpsps
a=1.5 g
Bedtime now!
LOL !
Do you also program with APL ?
Any time you feel like adding a few lines of english explanation, that would be great
Mike

Last edited by mstram; 1st Jul 2006 at 00:21.
mstram is offline  
Old 1st Jul 2006, 03:39
  #4 (permalink)  
 
Join Date: Sep 2002
Location: La Belle Province
Posts: 2,179
Likes: 0
Received 0 Likes on 0 Posts
unless you end up still doing S&L flight, some of the height gain comes not from pure vertical accel but from changing the direction of flight.

You can climb at several thousand fpm with less than 1'g', if the flightpath vector points up enough.

cant be bothered working out the physics right now, though ... too many bevvies
Mad (Flt) Scientist is offline  
Old 1st Jul 2006, 04:19
  #5 (permalink)  
 
Join Date: Apr 2002
Location: Nirvana South
Posts: 734
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Mad (Flt) Scientist
cant be bothered working out the physics right now, though ... too many bevvies
Happy Canada Day, MFS!
ICT_SLB is offline  
Old 1st Jul 2006, 08:08
  #6 (permalink)  
Per Ardua ad Astraeus
 
Join Date: Mar 2000
Location: UK
Posts: 18,579
Likes: 0
Received 0 Likes on 0 Posts
Apologies, mstram, I assumed you had a basic grasp of physics

From Google: http://www.physchem.co.za/Graphs/Equations.htm

Greetings to the colonies
BOAC 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


Thread Tools
Search this Thread

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.