Perfect practices to take ApG students exam and you continuing about this conditions ❤❤❤❤🎉🎉❤❤
@jamesyang5739Ай бұрын
this the best video i have watched so far
@user-gl1qx1dp7p2 ай бұрын
Very helpful 🎉❤
@ZeenaHearts3 ай бұрын
I’m learning to become a mechanic. Your content is extremely valuable. Thank you soooo much for taking the time to make videos for us. Totally wish you were my instructor, but you’re for piloting I see. 🤭
@B59h4 ай бұрын
Extremely well explained. Thank you. I honestly have not heard or seen it explained better anywhere else
@kamekaze9974 ай бұрын
Ty for amazing video! Gonna share this with my class as us future A&Ps study magnetos (saw ur video about that and landed here).
@brianferrero95445 ай бұрын
Very good video! I'm a student mechanic and I believe that "Normally, when RPM is decreased, MAP increases due to less demand for air by the cylinders" is not quite right. If we are talking about a plane with a constant variable pitch propeller, a decrease in RPM (by increasing the propeller blade-angle by manually adjusting prop lever) will put a higher load on the engine, thus slowing down the RPM of the engine. This causes there to be less vacuum developed by the intake strokes. So, the engine is producing less vacuum... and this also means the air pressure in the manifold will increase. If we are talking about a fixed pitch propeller, a decrease in rpm ( by closing the throttle) will typically cause the manifold pressure to decrease because more of the vacuum created by the intake strokes is kept/stored in the intake manifold because the throttle butterfly is more closed. If we are in a fixed pitch propeller plane and rpm is decreased by climbing the airplane, the manifold pressure will go up (throttle butterfly stays the same but rpm decreases and thus less vacuum is developed). I hope I'm not missing something... but I think this is right. Very good video.
@pahorang5 ай бұрын
Gracias.
@MikeDiaz-mf4jz6 ай бұрын
Ur making it complicated
@yonatanh20446 ай бұрын
Once again exceptionally good video.
@yonatanh20446 ай бұрын
thanks for the video. very well explained, helped me a lot !
@DavK6376 ай бұрын
Great video, thank you for taking the time to easily explain and share this
@DavK6377 ай бұрын
Damn and here I was trying to read the 8083-32 book when all I had to do is find your channel.. Subscribed brother. Thank you and bless your soul
@jimrotwiley55907 ай бұрын
Awesome video , super detailed and well explained. Thanks
@luke313811 ай бұрын
Had to start flying an aircraft with a pressure carb for work. I hate not knowing how my airplane works. This was super helpful! Just looking at those diagrams online and trying to decipher was giving me a headache. Thank you so much!
@pccaviationscience676911 ай бұрын
Glad it helped! It’s good to see that you take pride in knowing your aircraft. It’s a trait that I’ve seen in all the pilots I have come to respect.
@jhansen55j Жыл бұрын
Excellent explanation. Came across this video while troubleshooting the Wico-X magneto in my 1936 John Deere Model A. It not only educated me on the tractor application but more importantly, for the mag installed in my ‘77 C172. Thank you very much.
@pccaviationscience6769 Жыл бұрын
You’re welcome! Glad it helped.
@2polev355 Жыл бұрын
Dude is grinding up the spelling typos in the 8083. 😂 glad to see that everyone hate that damn book just as much as I do.
@luisarturogarciaarmijo9117 Жыл бұрын
Excelente 👍
@taproom113 Жыл бұрын
Ummm ...Might wanna explain how the actuating oil gets from the engine (fixed), to the hub (spinning)? Thanx & keep up the good work ... ! ^v^
@johnopalko52237 ай бұрын
Engines with constant speed props have hollow crankshafts. The oil flows through the crankshaft to and from the propeller hub.
@taproom1137 ай бұрын
@@johnopalko5223 Hi John, Thanx for the info. Curious how and where the oil gets into the crank. Is the entire crank hollow and it enters through a seal at the rear? Or is it plumbed through holes in the crank just up where the governor is? Thanx, ^v^
@johnopalko52237 ай бұрын
@@taproom113 I'm a pilot, not an A&P, so I don't know the details. The hollow crankshaft was just a bit of knowledge I picked up along the way. A quick Google search reveals loads of theory on how constant speed props work and how to use them but no technical details on the actual plumbing. I'll have to ask one of the mechanics the next time I'm at the airport.
@taproom1137 ай бұрын
@@johnopalko5223 Copy, and thanx again for indulging me, John. I think I knew this back in the 70's when I was just getting started flying complex aircraft ... but can't remember now for the life of me. I searched all the YT videos I could ... but none went into any finite detail. (I'm aging but my OCD is still Max-Q!) 😵💫 ^v^
@johnopalko52236 ай бұрын
@@taproom113 I believe it was Seth Lake who made a video in the past year or two where he talked about the hollow crankshaft. I don't recall if he mentioned how the governor connects to the crank. I hear you. My OCD hasn't abated with age, either. (I don't know if it's OCD as much as it is just unquenchable curiosity.) I'm guessing we're roughly the same age (I'm 69 today!) or you may be a bit older. I got my Private in the late 70's, in gliders, and I added an airplane rating a few years later. I don't fly anymore because of medical reasons but I just got my AGI/IGI certificate. I've been toying with the idea of getting on the faculty of PCC as a part-time instructor but I haven't really done anything about that yet.
@paradiselost9946 Жыл бұрын
Im just here to refresh my memories of yesteryear. Yep... Making turbine blades. All the same concept... just in reverse.
@zephire6943 Жыл бұрын
Great video, super clear explanation!
@ryans.5998 Жыл бұрын
So, the alternator requires a little electricity in order to "make" enough electricity to send back to the battery? I'm a little confused about the field pathway that you talked about. It seems like electricity from the main bus (which came from the battery) is being sent to the alternator, which then generates enough additional energy to replenish the battery. I was always under the impression that if your battery was totally dead, you could hand-prop the airplane and get it to start, which would then spin the alternator to recharge the battery. Where does that field current come from if the battery is totally drained? I know that the airplane would start because the magnetos are independent of the electrical system, but would this imply that the alternator just wouldn't be able to charge the battery even if the engine was turning?
@johngardiner1630 Жыл бұрын
All aeronautics is an educated guess.... taken to three decimal places. This video explains where we should start .....when guessing on propellers.
@jeffreyfalls8951 Жыл бұрын
Thank you thank you thank you. I just bought a case trencher with a v4 with a magneto and I’ve never touched one before and now I see everything I was doing wrong
@AF_CSL Жыл бұрын
Thanks, very complete.
@ahmadsamadzai8255 Жыл бұрын
Finally a suggested video by YT was a good one. My checkride is in a week. my cfi said I need to know this well. I have been stressing over it because I was still not clear on it after watching several of these videos on YT. I am crystal clear on this stuff after watching this. Thank you.
@Saltlick11 Жыл бұрын
Very good briefing
@fdfnfgnjfdjfjfk1436 Жыл бұрын
Cessna 172??
@pccaviationscience6769 Жыл бұрын
The diagram, which is taken from the Pilot’s Handbook of Aeronautical Knowledge, is for a C152, but it is VERY similar to the older model 172s ( and most GA airplanes).
@fdfnfgnjfdjfjfk1436 Жыл бұрын
@@pccaviationscience6769 thank you Captain... Gonna take up flying very soon...
@panthros7395 Жыл бұрын
Thank you!
@thedude3225 Жыл бұрын
great videos
@fdfnfgnjfdjfjfk1436 Жыл бұрын
The best explanation.... I really wanted someone to guide without technical jargon.... And you did it... I truly appreciate this video. Thank u Captain...
@kevinrodriguez9451 Жыл бұрын
This was great help thanks!
@txkflier Жыл бұрын
This is one of the best videos I've seen on propellers. The pitch of propellers for model airplanes is usually measured 75% of the way from the hub to the tip. The blades are usually wider there and it's also where most of the thrust is generated. To calculate the angle of attack, divide the pitch by the diameter and then divide by 2.36 (this is ~75% of Pi). So, for a 69x58 prop, it would be 58/69/2.36=0.3562. This is the tangent of the angle. To find the angle in degrees, use the arc-tangent function which gives 19.6 degrees. Since this is greater than a typical stalling angle of 15 degrees, it's likely that the blades will be stalled at zero airspeed. But once the plane begins to accelerate, the relative wind will lower the angle of attack of the blades, and they will become more efficient. The pitch speed of a 69x58 prop at 2400 rpm is 2400x58/1056=131.8 mph. At 2400 rpm, the rotational speed at the 75% point of the blade is 2400*69*Pi*75%/1056=369.5 mph. If the plane is flying at an airspeed of 105 mph, the tangent of the angle of the relative wind is 105/369.5=0.2842 which results in an angle of 15.86 degrees. Subtracting the relative wind angle from the blade's fixed angle of attack gives a relative angle of attack of 19.6-15.86=3.74 degrees. Subtracting the airspeed from the pitch speed gives a slippage of 131.8-105=26.8 mph or 26.8/131.8*100=20.3 percent.
@maheralazzawi7814 Жыл бұрын
very good
@maheralazzawi78142 жыл бұрын
very good
@cyberrasputen17182 жыл бұрын
Thanks. This is much better than handbooks from the 1970s that they gave us in class. Lol “it’s a mechanic thing”. That’s adorable. A&P’s ✌️
@claudecayol95512 жыл бұрын
Hi !! You did a very very good job with this video..Explanations are clear, and it's very helpfull to better understand electrical system !! Thank you for that !!
@tiagopower62 жыл бұрын
Thank you! a light in my mind.
@marttimattila95612 жыл бұрын
I made my first Rubber band model aircraft in year 1964 and learned a theory of propeller. Model airplane making learns more aerodynamics than hours in 747 cockpit.
@davidwallace57382 жыл бұрын
Thank you sir!
@MeiGunner2 жыл бұрын
if the coil have more Turns ,, does that Give it more volts?
@royalwilson66402 жыл бұрын
Im not even half way through this video and I want to say thanks...already..If schools would show these up dated videos instead of the BS they have us watch from the 1980's to understand this concept, paying for school would be worth it..20 minute video cleared up a 3 month confusion and teachers making up BS to sound intelligent...Im pissed about the time wasted and glad I found this video....I feel better now...lets continue....lol
@pccaviationscience67692 жыл бұрын
Glad this helped.
@aborashed58032 жыл бұрын
Thanks so much it's clear to understand ☺️
@primerizo192 жыл бұрын
Subscribed! Thank you!
@pccaviationscience67692 жыл бұрын
Awesome, thank you!
@calisthenicschannel99632 жыл бұрын
Thanks a lot for this explanation!)
@pccaviationscience67692 жыл бұрын
You are welcome!
@ramongranados88222 жыл бұрын
this is the best video on You tube about electrical system, You did an awesome job
@CACTUS482 жыл бұрын
I have always flown Piper single engine aircraft. There seems to be a difference between Piper & Cessna thoughts about the fixed Props that they use. The Piper Props seemed to have a longer diameter & be wider. What do you think about it.
@pccaviationscience67692 жыл бұрын
The diameter and pitch depend on several factors, such as ground clearance, the torque the engine can produce, the RPM they intend to turn the engine at and the intended climb/cruise speeds. In general, all other things being equal, a bigger diameter prop will be more efficient because you are accelerating more mass/sec of air, so can afford to accelerate it less.