Variable Pitch Propellers! What is the Blue Knob/Lever in Aircraft, and how to use it! 

Well, how'd it go?

There’s a specific order for every situation that won’t change but you gotta know em

Wow I suck at replying to comments haha indeed, but in the DA40, like many other aircraft, you take off using the full prop, but after 400-500 AGL, you bring the prop back to 2400RPM, which is max continuous prop rated for the engine. Hope that helps!

as you accelerate to climb speed, rpm can raise too, so for climb you should correct rpm and man pressure , it can be done in same time if you are experienced, you act fadec

Congrats! Best of luck! :D

Glad it helped!

Coarse I think

Feathering is when you bring the prop all the way back so technically coarse as it goes with the airflow so there is less drag. We don't actually use "coarse" though, we just say "feathering the prop" on multi engines :) Here's an article about it: www.skybrary.aero/articles/blade-pitch

X-Plane 11 at 6:00 and Microsoft Flight Simulator from 11:50 onwards

Thanks, Erick :)

@@Henrybailliebrown Nice video thanks! Can you pls share a link to the DA40 aircraft that you used for X-plane. Cheers

when i was on single engine, there was "settings", for TO-full power , low pitch, for climb-reduced TO power, low pitch, for cruise- some rpm(by pitch) and some man press(by power lever), for landing-idle, low pitch

It is in case you need to go around

That's exciting! Congrats! (Again I'm not a CFI) BUT it depends on the aircraft you fly! For example, on the 40's I fly, a good typical cruise setting is 23' of manifold and 2300RPM, there is a chart for all aircraft in their POH for power settings and the fuel rates, etc... they give ;) So depending what you are flying, if you are going for economy, speed, etc... You choose the settings from there!

haha, happy it helped! Also thanks for the topic idea, can start making the next one soon :) Cheers and happy landings!

Hey! Nice question! Prob depends on the aircraft but for the 40's I fly on, you reduce the RPM to 2400 (Max continuous) after you are 400-500 feet above ground. You keep full power because you are still in a climb. You can then reduce to a preferable power setting later for a cruise (typically 23', 2300rpm) Again I'm not a CFI and the procedure is different for different aircraft but again this is how it's taught on the 40's I fly on.

So happy it helped! Thank you so much for your support, and yeah finished my Multi over the summer, did it in a DA42, was like $1000/hr. Rip my wallet lol.

@@Henrybailliebrown And here I thought that was just a joke in the simulator, lol! Congrats nonetheless!! haha

Have fun!

yes, by tool , when prop is still

Oh dear XD

A wing partly pushes too, atoms colliding with it are pushed down and push the plane up (the wing is slightly angled to push air down) - or in case of a prop, push the plane forward. This is why even a non hydrofoil shape (eg a paper plane) can still fly. Wings do not just rely on hydrofoil profile for forces

@@Tom--Ace Not quite. A prop 'pulls' the plane thru the air the same way an airfoil in a sail pulls a boat thru the wind. This is why a sail boat can sail 'upwind'. But there are two physical forces at play in lift. 1. Newton's third law is: For every action, there is an equal and opposite reaction. 2. Bernoulli's theorem describes the pressure difference created when you speed up airflow. The wing shape curves the airflow over the top of the wing producing lower air pressure. The bottom of the wing is flat and the air moves faster. Producing lift. A prop is shaped like a wing and produces lift the same way except in the horizontal direction in front of and ahead of the plane. So, when the plane is taking off, Newton's equal and opposite is more in play on the wing. When the plane is in level flight, Bernoulli's theorem is producing most of the lift. The prop is always a Bernoulli device. The prop has to OVERCOME the drag produced by the wind hitting the front of the prop. Likewise the wing has to overcome the drag produced as the wind strikes the front of the wing.

Thank you for pointing this out.

front mounted prop is puller, rear mounted prop is pusher

@@makantahi3731 No. The prop in front is called a "tractor" and it pulls. The prop in back is called a pusher.