Last year in Rio de Janeiro, Brazil, a Republic P-47 Thunderbolt, owned by the Brazilian Air Force Museum, underwent a massive restoration work. A crowdfunding on the internet was started to help raise resources. The money they were expecting to raise in two months of campaign was raised in one single week, thanks to the passion of the donors. The plane was fully restored, looking new. A military ceremony was made to celebrate the feat... weeks later unqualified personal tried to start the engine only to destroy it as described in this video.

👍 How many people knew about how a radial hydrolocked before watching this 10 minute explanation??? Give a thumbs up 👍

Thank you, everyone, for watching! I wanted to do something to take people's minds off of what is happening. Plus any day playing with LEGO at work is a good day!!

I would love to hear Chuck talk about the Allison engine. BTW this radial engine discussion was very informative. Great job Rod.

Yes Chuck on Allison engine

My father was a mechanic on B29s, there was a question if the engine damage was due to dry top cylinders or flooded bottom cylinders. He said it didn't matter to him because if the engine wasn't turned through before starting he would be up all night changing an engine.

Any episode with Chuck would be worth watching ! But yes, I’d love to learn more about the Allison.

Yep, bring it on! Would love to hear chuck break down (not literally) the Allison turbine.

Oh heck yes, get Chucky to talk about Allison’s!! A very good explanation of hydraulic lock and very cool LEGO radial!!

Mikey you did a great job explaining this. That LEGO set gave an amazing visual to see the hydro lock in action! The most interesting thing for me was that you can actually bend the connecting rod by pulling on the prop. Wow!!

The rod will fail right about the time you break ground and run out of runway....but only at max gross.

Amazing Video Mikey! So proud! Learned a lot!!! Keep it up buddy!

Very educational and a good diversion from "the madness of now", thanks! Yes please, more engine talk, bring on Allison!

Absolutely! Chuck NEEDS to talk about the Allison engine! 👍 Great vid about the radial engine oil folly. I think the LEGO model and the plug-bottle-coffee demos were excellent teaching aids - high props (ooooh, PUN!) to you both for this massively entertaining lesson! Looking forward to Chuck and the Allison! 😁

7:15 this is really good info! I didn't know you could bend a rod under your own strength! So move the prop slow but don't force through a stoppage

You guys did an excellent job illustrating the problem and why. I had a busted rod as a reminder in my tool box for years reminding me oil don't compress...lol

In my racecar.... I forgot to turn the bottle on before doing a pass and hydraulically ejected number 5 piston and lifted the head. Expensive and embarrassing not to mention hitting the wall skating around on my own oil and water.

Excellent use of Lego, so simple but effective in showing what can happen when an engine lock occurs. And get chuck to do a bit to camera about the Allison engine too. Really good clip this....

Hi Mikey,thank you for yet another educational programme.I have watched your ice pilot series many many times on KZfaq.great work.

I'm no engineer, only an enthusiast of old aircraft who finds radial engines fascinating -- and this video gives a clear explanation of one of its characteristics. First rate -- and I will seek out others you've posted.

Yes Please have Church talk about the Allison engine! Mikey, great video!!!!!!!!! Rod is great at explaining everything. As a trained aircraft mechanic it was refreshing to hear and see your simple explanation.

First thing they do on “Connie” ...is drain the the oil from the bottom cylinders...hehe....there’s buckets under each engine.....and a 45 gallon drum of oil in the galley .

Thank You Mr. McB... few channels take the time to thoroughly explain things. You and your brother did a great job! Hopefully this will stick in our minds and next time a radial doesn't crank right.... an engine may be saved.

WOW this is great - so many cool props (no pun intended) ... you guys did a great job on explaining a complex condition like hydraulic lock ups

I remember we bought one of these engines R18-92 for $25,000 in 1991. Of course it was a rebuild, but man they have gone up and price which makes sense since there are less of them. Jim

When you start a radial after draining it, you're not making a mess, you're providing mosquito and bug protection to whatever is behind it. I love when my car is behind a radial that's being woken up after a slumber!

Love to hear Chuck speak about the PT6

You answer all the questions in my mind. And yes, lets hear about the Allison!

Great explanation all!

Great video and info on round engines!!!!!! Bottom oil issues have always been around since day one. And explaining why you count blades before mags on was just a great lession in round engines 101.....😉

I love these informational segments. The mechanics of radials are fascinating. Oh yes, have Chuck talk about the Allison engine! This is definitely the best KZfaq channel. Thank you for sharing these.

Top advice from the top radial operators. This was super informative Mikey. Woukd love to see a video with Mr Chuck please.

I flew a couple of times behind a rare Pobjoy 'R' radial, we pulled all the lower plugs and the oil gushed out of the lower cylinders. Ah, the joy of a 1930's engine, loved it. Get Chucky on the blocks, got to hear is one - cheers.

A couple of geniuses right here. For Real. I kinda thought I knew how a radial engine worked ... but no! Such a brilliant demonstration.

We need more Chuck.

Good one Mike! Always good hearing from Rod.

Good video! As a B-25 crew member we always pull the large propellers before startup. It is a crew effort and a valid tradition who saved our radials at least one time!

Was mechanic on P&W 4360’s and had to turn prop 20 blades then start

Once again a great video. You 2 are great. I thought I knew this subject fairly well, but I didn't know about the newer clutched starters. I also didn't know a human could bend a rod walking the prop. Great stuff. Definitely do the Allison, that engine has fascinated me for years.

I wish i could work for you guys. Im a few months from finishing A&P school. Though i want to deal with modern engines, radials have an alluring charm that i just cant shed off.

I had That Allison 501-D13 model as a kid! Lost it in a terrible garage fire. Some how the prop (which is adjustable) survived and is stored somewhere in my basement! That was a VERY awesome model and teaching tool! If I could only have one complete today! $$$

As a mechanic of anything with an engine in it, I love this stuff! Great explanation, Mikey and Rod. 👍🍻 I'll be watching for the Allison vid. 😎

You are absolutely right Mikey... that radial engine video did take my mind off the craziness in the world for a few minutes... thank you!

Yes brother pull the plugs on any engine that is vapor locked!

I love how you are keep these old Ladies ALIVE!

The quality of the content on this channel goes up with every video. Well done also on the models!

Yes Please I would like Chuck talk all about the Allison engine. Rod and your talk about the radial engine was very informative especially about the old starter (with no clutch) and the new (newer) starters with clutch.

That was so awesome you were able to LEGO the engine! That was a way better demonstration of the exotic insides of a radial engine than what we got in A&P school ... maybe you could publish the plans so the profs could build their own demo kits (or assign as make-up time for students who missed a class).

Well I feel a little smarter today! Thanks Mikey and Rod. Great talk with awesome prop’s! Can5 wait for Chucky’s lesson on the Allison!

Heck, you could hae chuck talk about how the potty in a DC-4/Electra works and I would watch as all things aviation interest me.

Excellent visual lessons on this Mikey. Thanks for a bit of escape from “reality” and yes please on an Allison lesson from Chuck.

The airline i used to work for used Allison 501-D's on their Convair 580's. Good times. Let's hear from Chuck!

Thanks you for making these types of videos. I like all different types of engines and it’s cool to see something that you don’t see every day!

A very good explanation about hydrolic lock on a radial. I had many cases getting that condition. Many would say turn it backwards and dump the oil back into the intake or exhaust and clear it, problem is when the cylinder comes back around it will gulp the oil you just cleared and lockup again. if the engine starts before it cleared it will bend the rod.

Nice informative valuable video for anyone following Radial Engines. Loved it and yes let Chuck talk about engines that should be interesting.

Spent four years working on C-97 Air Force cargo planes as a line mechanic. Powered by four P&W R 4360 radial engines. I'm surè you know this was the largest production radial ever built. Massive horse power and massive torque. It was truly a master piece of perfectly timed moving parts. Our squadron flew from California to Viet Nam, during the war, nine times a week with a stop in Hawaii and one in Japan and on to Viet Nam, before doing a turn around and flying back the same route. 90%of the flight was over the Pacific Ocean, a distance of around 5000 air miles one way. It took ten hours to get to Hawaii and another seven to get to various American air bases in Viet Nam. The plane was loaded going both ways with equipment, ammunition or troops who had finished their time in the war zone. The engines were very reliable crossing the Pacific without a misfire. The main problems with the engines was the amount of maintenance and the number of troops necessary to keep the 4360 purring along. Every time the plane sat we needed to walk the props through seven times before starting. This procedure took three or four guys about ten minutes each engine as it was a lot of work to crank them by hand while fighting the compression strokes from the 28 cylinders. The scavenger pumps helped but as an engine got older the oil drain into the lower cylinders increased. There was no getting around the prop walk. We had about a dozen of these monsters to care for. They leaked massive amounts of oil onto the tarmac and continued leaking while in flight. When overhauled with very low hours they leaked less but never really cleaned up their act. Under full take off power with max. load and producing around 3500 HP each they were bellowing monsters that vibrated the entire aircraft. If you were on board the vibration could be felt in your chest. It was an experience of a life time.

I love the maintenance videos ! I want more of them, it would be great if Chuck could make a video about the Allison engine, perhaps also include the APU gas turbine in the video !

That was very informative Mickey 👍👍 specially for us that don’t know much about radial engine’s. Enjoy your videos as always. Thanks 👍👍

When I saw the coke bottle with a spark plug and "piston" I thought you might fill it with petrol vapour , spark the plug and send it flying to the other end of the hanger.😊

Yes, McDonald's coffee is like 50w.

I joined the air force a bit late, they had just retired the Tracker and Dak. I used to watch one of the Trackers starting in Comox, always a good smoke show. This is good lernin'...

What a fantastic video with Rod, Chuck and yourself Mikey! Loved the Lego engine and the explanation well done! Definitely looking forward to an episode with Chuck on the Allison engine!

Thanks Mikey for posting this. I enjoyed it. Even though I knew about hydro locking on a radial it was very informative to hear Rod talk about it. I was actually unaware of the starters with the clutch so you don't have to pull the plugs every time you want to start one of your C-47's or Dc-3's etc. I would love to hear Chuck speak about the Allison engine. Also, your tech videos are very informative. During the build of the DC-3 I believe you had a video about reskinning an elevator on a DC-3. Tech videos like that are fantastic. Please keep them coming. Thanks.

I learned a lot today... thank you. 👍🏼

You learn something new every day. I heard from someone long ago that you could blow a cylinder or cylinder head.

Answers a few questions. Thanks for the info. More videos like this would be great!

Awesome video. Rod explains things so well. Chuck talking about anything...hell yes! Keep up the great work.

My dad enlisted in the army air Corp in December of 45 and got out in 54. I remember him telling me how they would pull radials through by hand on p 47.s and others. He crew cheifed them on Okinawa. Great video. Thanks.

That Lego example was a brilliant way to explain this issue!!!

Mikey you do some Amazing Quality vids Your Explanations are simple enough to understand and your video Editing is Good with the picture blown up so we can see exactly what you are talking about. Outstanding work to all who were involved! And there were no Radial Engines Damaged or Abused in the making of this Video. Best Wishes! M.H.

AWESOME video! I'm no pilot & don't have immediate plans to become one, but I LOVE learning random things like this!

I'm learning something new everyday. Thanks. Cheers

Modelling Fairchild's PT19 engine systems and this video is golden =) Thanks for posting it!

We pulled the prop through on the seats and the beaver at the NC Forest service. Never had a problem and it was a procedure that we did since the forties.

Fantastic! I wish they taught cool ways like this in school to learn.

I would listen to ANYTHING Chuckie wanted to talk about. Arnie and Chuckie were my favorite from Ice Pilots NWT. And I LOVED their damn buster special. HAVE CHUCKIE ON PLANE SAVERS MORE!!!! PLEASE!!!

I could never figure out why i saw them turning radial engines thru with the prop. Now I understand .Makes perfect sense now.

Great job on the video. Good topic and it would be neat to hear Chuck on the Allison engines as well.

I recall learning about this in Aerotech school. " burping " the cylinders as we called it. Outstanding video.

I’m not a pilot nor do I work with or on planes but your channel is so informative and interesting. Good stuff man ✈️

Yes! Please have Chuck explain the T56! Then...reserve an episode for him to explain the prop controller (valve housing and pump housing)

Oh- the famous Allison T-56; I know a little something about those guys!! 😉. BRILLIANT description of radial hydraulic lock. REALLY good job!!

Mikey you're a genius! Clearest explanation I've ever seen for the hydraulic lock. And a radial engine out of legos!! Cool stuff. I had no clue that you can bend a rod by hand, but the biggest prop I have pulled through is an 85hp opposed 4 cylinder.

You got a great crew Mike. Keep educating us fans. Thanks.

A excellent veiw and heard about this problem but to actually see that with uncle Ron Wow! That was quick! A excellent veiw thanks for all you do Mikey! Thanks Sean.B!✌

Awesome video, Mikey wonderful props you put a lot of time into this one thanks for sharing. Play Safe From Elliot Lake Ontario Canada.

Well-explained description of the hydraulic lock. It makes a lot of sense👍👍👍👍👍

Where else can you hear Rod talking about how to bend a rod or Chuck how to chuck an engine ;-D?!

super effort Mikey, extreamly well explained & the props were simply magic. Buffalo rocks. one of thst best videos i've seen in quite some time ( agent jz would be impressed )

Thanks for this video it helps hopefully that more people learn about those engines

We had the same issue with the inline inverted DH Gipsy Queen engines on the Heron aircraft, because every cylinder is 'upside down'. Standard procedure was to pull through each compression by hand before the first start of the day - if there was resistance felt, remove a plug from the relevant cylinder and allow the oil to drain out. However, oil in the cylinder was a good indicator that there might be a damaged or worn piston ring.

Epic demonstration. Love seeing Rod get more involved.

Thanks Mikey. I really enjoyed that. Especially liked the radial enhancing the audio. Nice to hear from Rod on this subject. Please do a vlog with Chuck and the Allison. Always look forward to the next one!

Amazing educational video! Explains lots of things incredibly well. I love that Lego radial! And at the end, again the Electra. It's wonderful that the last of the big passenger turboprops are finding a home with you (even if not flying passengers).

Thanks Once again for the education. Awesome contribution from Rod!

That was a great explanation of a lock! Thanks very detailed and informative. I had no idea about that issue.

Brilliant....thank you....totally explained..

Excellent presentation on the problems of looking after radials.

Very nice video. Kermit Weeks had a radial that had oil built up in the intake and got into the cylinder after it started and bent the con rod.

Love radials. Very well explained, and YES, I'd love to hear Chuck talk about the Allison turboprops!