Cirrus Aircraft Maintenance - Changing Our Propeller
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- Опубліковано 19 вер 2024
- EP154: See inside a Cirrus SR22 engine with a Licensed Aircraft Maintenance Engineer (L.A.M.E) as we change the propeller. Learn about the engine, how the Constant Speed Unit (CSU) works, what magnetos do, how the heating and air-conditioning function, and more.
We're changing from a 4-blade composite to a 3-blade aluminium Hartzell Propeller in preparation for my trip across Australia. I'll be landing at dirt strips and the new propeller is more durable and won't pick up as many chips from stones when at Outback Airports.
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VERY IMPORTANT: I am a private pilot and am NOT qualified to give flying instruction nor aircraft maintenance advice. This video, like all videos on this channel, has been significantly edited from the original source footage and is provided for entertainment purposes only. A lot of information has been omitted. If you have any questions about anything you see or hear, please speak to a Certified Flying Instructor or a Licensed Aircraft Maintenance Engineer (L.A.M.E) first.
Filmed on a Canon 80D, often a few GoPros, and sometimes my iPhone.
Mark, Paul and Steven at Blue Demon Aviation Moorabbin are great. They have done all the 50 hrly’s and 100 hrly ‘s on our SR22 G5 and have taught us heaps while helping them in the process. Very good hands on experience as a pilot and definitely provides a much deeper understanding of how things work. Another great VID Stefan. I agree with the other comments about a need for good “aviation engineering” content. >>>>> “ Drop your cowls with Stef. “
Removing the bottom cowl is a damn site easier than my Glasair's. Mine needs two people, one of which must be an accomplished gymnast of no more than 30kg and possessing four hands!
@Jax Landry Thanks Jax, I'll give it a go.
Well stef,as I like to say it's good to learn something new every day cheers mate.
This is pretty awesome, Steph. Watching the technical aspects is super cool.
Glad you found that enjoyable Brian. It’s good to stop and literally take a look under the hood sometimes, take away some of the mystery of what powers these things. Thanks for watching, stef 👍
You should make a video about 2 vs 3 vs 4 bladed props and the differences in both cost and performance
Agree. That would be interesting.
Alex G That’s What I did but I always know that we don’t have any Cirrus SR-22 that has a 2 blade prop.
The 4 bladed Cirrus SR22s do not fly over my house that much often but it’s rare when they do.
I have exactly the same four blade prop on my SR22 - and I would really never go back to the 3-blade. I land on grass strips a lot and I never had a problem in 4 years. The 3-blade might be better on rough gravel strips though. PS: In a conventional Constant sped airplane the blue lever does not control the "pitch" of the blades but the rpm. The pitch is set automatically by the prob.
Yes and how is the RPM controlled?
@@tronas8515 It is a constant speed prop. Or what exactly is your question?
That was very interesting. Steven explained everything very simply. Would be great to see more maintenance related vids in the future. Maybe you’ll need a jug or two after your trip.
Great video. Would love to see more videos like that on aircraft maintenance and such like. Brought back many good memories for me. I did a couple of weeks work experience when I was in year 10, 1985, at Moorabbin with 1 of the places still operating now. Even was offered an apprenticeship but unfortunately didn't take it up due to my stupidity. I wanted to fly planes not fix them.
I've been able to see one of the planes I fly in maintenance not a long while ago, it's very interesting to see what makes you fly
Thanks for the maintenance lesson love the 4 blades just like on some of the war birds.
I was told to buy 3 blade Composite by Hartzel. Top end increase at the expense of climb when compared to 4 blade.
First video of a SR cowl being removed. Thanks for this! Let us know when you’re back in Florida and you want to fly our Centennial Edition!
That was a great episode! Thanks Stefan 👍🏻
Very interesting video Stef! Thanks, Especially the point about worse ground clearance, but lower RPM for taxi with the three blade
Yeah I found that point interesting too. Thanks Tony, glad you enjoyed that.
Very cool, I'd love to see more videos like this! Not many like it on UA-cam.
Thanks Pat, we have a few engineering and behind the scenes specials coming on the channel, so that’s great to hear you enjoyed this one.
Stefan, it would be good if you could do a video on the stall strips on the SR22 and how the benefit all aircraft with this feature.
Awesome vid Stef, really love the more tech stuff...just bin the ‘frequent flyer lounge’ stuff! Otherwise my fav channel on YT.
Ha, thanks AusPilot. No plans to ‘bin’ my travel content, but there will always be aviation content on this channel don’t worry 😂
Awesome video , my training aircraft was behind you VH-FUF
What is the difference between the one that has 4 and the one that one has 3 ... Any advantage or disadvantage
Despite of the durability of the prop. What’s real the différence them ? The 4th one is more effiency right?
I am flying it on Thursday so I will tell you what it’s like
In video editing, is that what you call a jump cut? Stef, you're channel is now officially the best GA channel! Thanks!
The overalls bit you mean? Yep, that's a jump cut. It looks pretty stupid when you film it, but came out well in the final edit!
Stefan Drury Yes, must be tricky to get it so precise. Lots of fun to watch!
If the pitch is controlled by the onboard systems, does any modification to the engine management system need to be done to make the system cater for the change in prop as far as CSU goes?
Sorry for being 2 years late. As far as my AGK education and experience with FADECs goes, like any normal CSUs, fadec controllers looks for RPM.
If you look at how CSU works its centripetal forces acting on a governer letting oil in or out to change the pitch to maintain a constant RPM.
Imagine flying a 182 and without telling you I changed the propeller diameter, you’ll have a different to previous lever position but you still pitch for a same RPM. Same as the FADEC, it’ll also look for the optimal RPM at your selected power setting so nothing really has changed.
Hope that answers your question!
Propellers - Three for show, Two to go
Tomias Thexder the ladies have always preferred the showers... so I’ve been told
Jeez stef, you’re up early. 6am post! Can’t wait to see all the content that’s coming up! PS congratulations on 15k!
Thanks General Kenobi. Early bird catches the worm etc. But really, my cat is up early and when she wants feeding...
Stefan Drury same with my cat!
Great video, one of my favorites!!
I always heard unless at overhaul to not change the number of blades on the prop. I think the weights inside the engine can shift and cause damage.
That was interesting Stefan. Looking forward to your flight. Don't know Phillip to email for a ride in a Cirrus. Besides I live quite far away from you. Keep current and fly safe Stef.
Three blade looks like the correct propeller for the aircraft. ( just my opinion ) :o)
Why did you take the propeller out of four and put the propeller out of three?
Great episode Stefan, can't wait for the trip, i do like the new 3 blade more "strangely" is it a brand new prop ? or one you had previously .
Four blades looks so much better !
The 3 is growing on me, but I agree the 4 does look quite special!
Dankie Stefan & Steven 4 this video. You change the prop from 4 blades to 3 blades. The 3 blades is better for the out-back. Do you also get 5 or 6 blad prop? Thanks.
Good to see you again Stefan. Correct me if I am not wrong? I think you are an Aeronautical Engineer? and of course a Pilot.
I don’t have any engineering qualifications, I leave that sort of thing to the experts like Steven!
Non pilot asking.....3 vs 4 props???
Hi Stefan, very interesting. I guess I'm a tech nerd. Anyway... what are the disadvantages of leaving the 3 bladed prop on? Why swap back to the 4-blade prop? I understand that 2-blade props are more efficient but even bigger in diameter. My trike is 3-blade for the reason that a 2 blade would be too big, and a 4-blade is not efficient enough. My understanding too is that more blades means more torque for climb, but less efficient cruise. Thoughts?
Thanks for the videos! Will there be more Friday flying school in the future?
Thanks for watching Mark. Yes, apologies, FFS is coming back, I’m recording some new content with CSIP Mike Walden. Just had to take a backseat as I prepared for the Outback trip.
Magneto's . such a modern aircraft, such an old tech engine
isn't that standard for a piston?
Interesting stuff, how long did it take to swap the props?
I have always wondered, what is the benefit of 4 blade over 3? Faster? Smoother? Or is it just the aesthetic?
The 4 gives me better climb performance, and is a handy speed brake if you want to slow the SR22 down. It's also a little quieter and smoother yes. But the 3 is more durable, better for some of the dirt strips I'm planning to land on.
Stefan Drury ahhh nice! Makes a lot of sense. Last question, does it burn a little more fuel than the 3 blade?
Question Are those one use bolts for the prop? They don't use the same bolts every time, do they? Also, do you have to be an AP mechanic to replace the prop?
Thanks, great videos!!
Is the increase in noise with the 3 blade easily noticeable when you're flying or would you need to measure the decibels to realise that it's louder?
humble opinion
Video Starts at: 0:00
Hi - two questions if I can...I have an older 4 blade MT prop (Lancair) and it easily picks up dings/nicks which are costly to keep repairing...is the newer scimitar blade version any better (does your LAME have a view on this?); what do you expect the performance difference to be with the 3 blade Hartzell? txs and cheers
Great video Stef! I've always wanted to see what's inside an engine, maybe you can ask Qantas to see inside a A380 Jet Engine next ;)
The old saying for blade counts was "3 for the show, 2 for the go”... So what's 4? Or 5 or 6?
4 for the 'whoa!'...?
New to this channel so apologize if this is a rookie question, but is this your plane or do you rent it? If the latter, how did you get approval to do this from the FBO?
Interesting stuff Stef. Did they change it especially for you?
The plane is going on two Outback trips in short succession. My one, and then one immediately after, so they thought the timing was good to do it now.
Is this part of a flying club, or are you a partial owner, or do you just rent KJN?
Aero360Aviation was wondering this too
Blue Demon Aviation, which is just an FBO / rental company I believe.
Hey, KJN is owned by Blue Demon Aviation. I rent it through them.
When i first went flying, we stopped at my grandpas friend friend, who is a aircraft mechanic and he was working in a engine.
The engine was colored red white and blue
Your awesome
Does it affect the performance or noise genereated by the propellor?? I have heard some people saying that a four blade is quieter..
It’s definitely a different sound, we didn’t do a noise level test but the 4 is more “whistly” than the 3. The 4 also sounds a bit more like a turboprop than the 3 in my opinion too.
The three blade hartzell is a hotprop for de ice. Was the four blade?
If not will the heat or fluid feature of the prop function??
Well spotted Lee. No, the 4-blade didn’t have anti-ice, KJN doesn’t have that option. But Blue Demon are using a new 3-blade with anti-ice so when we put the 4-blade back on, they have the option to put this 3-blade on an aircraft with FIKI capabilities.
Is that what the 'leads' are for - the ones going to the black leading edges of the prop roots at time 8:52?
sactu1 none of the cirrus aircraft use "hotprops" they are either TKS or nothing. If there is no TKS the black boots are then only use to help with rock chips. You get better climb with the 4 blade and its quieter. But the 4 blade is an MT brand and has a 6 year overhaul
Does anyone know if you can order a Cirrus with a 4 blade prop?I would prefer the quieter blade.
@@tomedwards9265 no cirrus comes with a four blade prop from the factory. You must order it on your own after purchase of your new plane
4 Blade looked wrong, 3 looks much better on the SR
Why please ?
Question from a novice, did this alter your fuel usage at all?.
Hey Raymond, not noticeably no. It gave me a little bit of a cruise speed increase for the same power settings. So I probably saved fuel overall because of making the same distance in a slightly reduced amount of time. But in terms of fuel usage for the same power setting, it really wasn't noticeable in the fuel flow no. Thanks, stef
Stefan Drury Hey Stef. Thanks for this. Ray
Does the switch to the three blade prop affect the weight and balance measurements much?
It does a little yes, the new prop is slightly heavier so I do have to amend the w&b calculations slightly.
Not mention but the Hartzel looks like alum. They do make a composite with a nickel leading edge. Much lighter.
Steve!
Our new Internet star. MORE STEVE VIDEOS!!
Stefan Drury Agreed! Moar!!!
I think I prefer the 4 blade as well.
Kaine Sherwood other than it being quiet it's not worth it. 4 blades Cost more to buy and little to basically no increase in climb speed. The three blade is cheaper fairly quiet and it is faster in cruise.
Harry Harkins, sounds about right, but it does look better :D and with a Cirrus its all about the looks ;)
Can do attitude. Yeah.
Throttle at idle, then more settings, R...E...W, wonder what they mean? O...P. Oh right, duh.
Subtitles please!!!!!
A four bladed Cirrus SR22 flying over my house: ua-cam.com/video/m6rrPiyyTqs/v-deo.html
loosing performance gaining speed that's all
So its a LAME Vid Stefan ;)
Haha, I approve of this pun.
Terrible humor makes people run away.
Very interesting! What a pity Steven has two tampons in his cheecks, so I could barely understand what he said.
Engine.!