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-   -   Another load factor question (https://www.pprune.org/tech-log/232788-another-load-factor-question.html)

mstram 30th June 2006 22:00

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

BOAC 30th June 2006 22:08

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!

mstram 30th June 2006 23:53


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 ?:ooh:
Any time you feel like adding a few lines of english explanation, that would be great :ok:
Mike

Mad (Flt) Scientist 1st July 2006 03:39

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 :)

ICT_SLB 1st July 2006 04:19


Originally Posted by Mad (Flt) Scientist
cant be bothered working out the physics right now, though ... too many bevvies :)

Happy Canada Day, MFS!

BOAC 1st July 2006 08:08

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:)


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