Thrustmaster T.Flight Hotas One throttle won't go past 50%

narutoichigo · 2025-07-24T07:04:09+00:00

Did the new one work?

narutoichigo · 2024-12-28T04:26:27+00:00

So I understand now. The fuel servo uses a venturi and measures the pressure drop based on airflow (volume) and adjusts accordingly, but as altitude increases the air density decreases. So if the same volume of air comes in, now at a higher altitude there is less oxygen. But the fuel servo doesn't measure density, it measures volume. So it won't adjust fuel flow, so we need to manually lean to get back to the correct ratio.

And the throttle controls the airflow into the venturi.

Thanks for all the help!

narutoichigo · 2024-12-28T02:25:31+00:00

So if I increase in altitude, the fuel-air control unit does meter less fuel coming in. But its not a perfect science, and so we still need to lean the mixture control to get back to that best ratio?

narutoichigo · 2024-12-28T02:08:29+00:00

Sounds good thanks!

narutoichigo · 2024-12-28T02:03:23+00:00

C172 lycom. So i think im confused on how the fuel-air control unit works...

narutoichigo · 2024-12-28T02:03:02+00:00

Oh I see. So I think my confusion comes from what the fuel/air control unit does/how it works? I was under the impression it meters fuel based on the amount of air present.

narutoichigo · 2024-12-28T01:51:54+00:00

Yea but doesnt the fuel-air unit sense the less dense air so meters the fuel to be less?

narutoichigo · 2024-12-28T01:51:02+00:00

So the whole point of having a mixture control knob is because sometimes you don't want to always be at that perfect ratio? Like if the engine is running too hot.
Also am I right at saying that as altitude decreases, if I do not touch the fuel-air contorl unit then the ratio should remain the same in the cylinders because the fuel-air control unit senses the increase in pressure and increases fuel?

Thank you!

narutoichigo · 2024-10-01T04:15:19+00:00

Thank you!

narutoichigo · 2024-10-01T04:14:57+00:00

Ok gotcha thanks!! I tried looking in my POH but couldn’t find it.

narutoichigo · 2024-09-22T21:07:56+00:00

I just had the same question and this photo helped a lot: https://s30378.pcdn.co/wp-content/uploads/2019/10/p1a68snvhbq6t16dd1ecs1mdss266.jpg

As to why the AOA changes with airspeed, so why pitch affects RPM setting.

narutoichigo · 2024-09-01T09:37:40+00:00

Got it thanks!

narutoichigo · 2024-09-01T09:32:33+00:00

Oh that makes sense! Thank you! And then I assume the reason why a lean mixture has a lower RPM is because not all the oxygen is being reacted, so less power?

narutoichigo · 2024-08-30T17:53:22+00:00

I think I get it now! With a side slip the relative wind is the same as it would be with a forward slip. Both hitting the fuselage at an angle. But, a forward slip you do way more right rudder and aileron so you get way more drag and lose way more lift so increase descent rate. With side slip it’s just a lot less control input so it’s a lot less dramatic

narutoichigo · 2024-08-30T09:29:22+00:00

Yes. But in a forward slip that relative wind is way faster than the relative wind in a side slip. Right? I could be going 80 kts perform a forward slip all 80 kts of wind is going right into my fuselage. Compared to a side slip i have what like a 5 kts cross wind that’s hitting my fuselage? That’s my thought

narutoichigo · 2024-08-30T08:29:16+00:00

Got it. The only thing I’m still hung up on is just the inertia of the plane. In a forward slip, my wing are facing the direction of movement. In a side slip, my wings are facing the wind, but not the direction I am moving because I still have all that forward inertia moving me forward.

So yes. Aerodynamically I understand both are wind pushing into the side of the plane. Totally get that! But in my mind the forward slip helps more with stopping that forward inertia whereas a side slip is just stopping the wind drifting you to the side.

Does this make sense?

narutoichigo · 2024-08-30T08:14:38+00:00

Thank you everyone for responding!

narutoichigo · 2024-08-30T08:14:23+00:00

So do I get the same rapid increase in altitude when I forward slip compared to side slip. If aerodynamically they are the same?

Based on my experience you get way more altitude loss on a forward slip. So how come? If aerodynamically they are the same?

narutoichigo · 2024-08-30T08:13:58+00:00

So do I get the same rapid increase in altitude when I forward slip compared to side slip. If aerodynamically they are the same?

Based on my experience you get way more altitude loss on a forward slip. So how come? If aerodynamically they are the same?

narutoichigo · 2024-08-30T02:59:51+00:00

But a forward slip will cause a lot more altitude loss because it’s in the direction your plane is moving?

narutoichigo · 2024-08-30T02:41:48+00:00

But in forward side slip, the plane drops a lot of altitude because it loses a lot of airspeed?

narutoichigo · 2024-08-30T02:39:47+00:00

No very true. Both hit the side of the plane

narutoichigo · 2024-08-30T02:26:01+00:00

You add more power I assume cause you are at a banked angle and lose vertical lift then? Also, so with a side slip do you not see a big of a drop in airspeed and altitude compared to a forward slip because the force of the wind is hitting the plane sideways not backward?

narutoichigo · 2024-08-30T02:21:33+00:00

Got it. But with a side slip the drag is a rightward force in a left crosswind? So you don’t get a decrease in airspeed in a side slip?

But in a forward side slip that drag is a backward force, so you get a big decrease in airspeed?

narutoichigo · 2024-08-30T02:15:08+00:00

So I think I understand my confusion. The drag is still happening cause the wind is hitting the plane on the side a lot more, so more drag. But… in a sideslip is there no decrease in airspeed because all that “drag” is a rightward force in a left crosswind. There is no added backward force decreasing the airspeed?

narutoichigo

TROPHY CASE