Register to reply

Thrust in propeller engines

by Emzielou83
Tags: engines, propeller, thrust
Share this thread:
Emzielou83
#1
Dec8-10, 08:44 AM
P: 23
Can anyone help me?

I'm doing a question on aircraft propulsion technology and i'm stuck.

The question is:

'If the mass of air through a propeller is 1000 Kg/s, the aircraft's velocity is 100 m/s and the slipstream velocity is 120 m/s, calculate the thrust?

Attempt at answer:

Surely if F = ma then the equation should be F = 1000 * 100 = 10000 Kg/s

But I don't think this is the right answer as I have not taken the slipstream velocity in to consideration.

The only other equation I can find is

F = (m dot * V)e - (m dot * V)0 + (pe - p0) * Ae

But I don't have pe or p0 or Ae neither do I understand what they are.


Can someone please steer me in the right direction?

Thanks
Phys.Org News Partner Science news on Phys.org
'Office life' of bacteria may be their weak spot
Lunar explorers will walk at higher speeds than thought
Philips introduces BlueTouch, PulseRelief control for pain relief
avinod4all
#2
Dec8-10, 01:01 PM
P: 8
Hi, with the given conditions, thrust can be calculated by using the formula:
Thrust = Mass airflow X (slipstream velocity-aircraft velocity).
Below website has good information may be it helps you.

http://www.flightlearnings.com/basic...-part-two/384/
Emzielou83
#3
Dec8-10, 01:36 PM
P: 23
Thanks very much.

It seems so simple now, just couldn't see it.

Thanks again


Register to reply

Related Discussions
Propeller thrust Aerospace Engineering 3
Pulse Jet Propeller Thrust Calculation General Physics 0
Propeller Thrust Mechanical Engineering 5
Propeller Thrust Equation Mechanical Engineering 0
Propeller and thrust Mechanical Engineering 8