About thrust force

[Grandss]

I have one question concerning thrust force.
What's happend if i increase thrust at a very hight value (theorics).
I know that lift will increase too and drag decrease.
But for the plane, what it do really.
Just UP or begin to turn to rise ?

Thanks

Grandss

[Bob Noel]

In article >, Grandss <grandss@nospam> wrote:

> I have one question concerning thrust force.
> What's happend if i increase thrust at a very hight value (theorics).
> I know that lift will increase too and drag decrease.

drag increases with airspeed, doesn't it?

> But for the plane, what it do really.
> Just UP or begin to turn to rise ?

depends on the propulsion system.

--
Bob Noel
no one likes an educated mule

[Grandss]

Bob Noel a écrit :
> In article >, Grandss <grandss@nospam> wrote:
>
>
>>I have one question concerning thrust force.
>>What's happend if i increase thrust at a very hight value (theorics).
>>I know that lift will increase too and drag decrease.
>
>
> drag increases with airspeed, doesn't it?

yes, increase sorry

>>But for the plane, what it do really.
>>Just UP or begin to turn to rise ?
>
>
> depends on the propulsion system.
>
Ok but for a classic plane (type little cessna) what's the reaction of
the plane ?

[Bob Noel]

In article >, Grandss <grandss@nospam> wrote:

> Ok but for a classic plane (type little cessna) what's the reaction of
> the plane ?

For the single engine fixed-pitch prop, increasing the RPM will increase
the airspeed, thus increasing the lift (and the plane will climb, assuming
no change in trim). Also, there will be a left-turn tendency (think about
the difference in thrust of each blade due to angle-of-attack variances
as it spins).

--
Bob Noel
no one likes an educated mule

[john smith]

Bob Noel wrote:
> Also, there will be a left-turn tendency (think about
> the difference in thrust of each blade due to angle-of-attack variances
> as it spins).

Depends upon which way the prop is turning!

[Larry Dighera]

On Sun, 21 Aug 2005 01:58:16 +0200, Grandss <grandss@nospam> wrote in
>::

>I have one question concerning thrust force.
>What's happend if i increase thrust at a very hight value (theorics).

Generally an increase in power/thrust results in an increase in rate
of climb if the wing's angle of attack isn't changed. Increasing
thrust and reducing AOA should result in an increase in airspeed.

>I know that lift will increase too and drag decrease.

If the increased thrust results in an increase in airspeed, parasitic
drag will increase.

>But for the plane, what it do really.
>Just UP or begin to turn to rise ?
>
>Thanks
>
>Grandss

I realize you're in Luxembourg, and your native language is probably
French, but here's a link to web site written in English that will
answer all your questions: http://aerodyn.org/contents.html

Perhaps you can translate from English to French here:
http://www.babblefish.com/babblefish/language_webt.htm

[Darrell S]

Grandss wrote:
> I have one question concerning thrust force.
> What's happend if i increase thrust at a very hight value (theorics).
> I know that lift will increase too and drag decrease.
> But for the plane, what it do really.
> Just UP or begin to turn to rise ?
>
> Thanks
>
> Grandss

Depends. Thrust is a term generally only used for jet or rocket powered
craft. On a jet or rocket powered plane the speed has to increase to
increase wing lift. On most prop airplanes an increase in power will
produce greater airflow and increase lift somewhat even before speed
increases.

However, if you have enough thrust and enter a vertical climb you can
support the aircraft weight by power alone, without regard to wing lift.

--

Darrell R. Schmidt
B-58 Hustler History: http://members.cox.net/dschmidt1/
-

[Grandss]

Grandss a écrit :
> I have one question concerning thrust force.
> What's happend if i increase thrust at a very hight value (theorics).
> I know that lift will increase too and drag decrease.
> But for the plane, what it do really.
> Just UP or begin to turn to rise ?
>
> Thanks
>
> Grandss
Thanks for all precision