P-47 Engine damage video

Hi Greg, I have been enjoying your videos for some time and joined up today to give some support, for a year or so anyway and to post what I am pretty sure you will find interesting. I am retired now but still active privately with a couple of aeroplanes in North Queensland. We have a few things in common, plenty of GA time including bush flying (in PNG for me) a few jets finishing on the B767 around the Asia Pacific. Regarding your videos on the P47 and specifically propeller effects, I offer this experience.... Many years ago when studying for an Australian PPL, I am pretty sure there was no mention of P-factor, only the "swirling slipstream" effect along with torque and gyroscopic effects. The slipstream effect was the reason given for the yawing effect at high power and low speed. It was about then that I read an article in a flying magazine by Barry Schiff which described P-factor and it made sense to me. He may not have discounted the swirling slipstream effect entirely but I think he thought it less important. Anyway that is how I think it got in my head that P-factor was a large effect and that the swirling slipstream effect was a myth. I said to myself; just look at a rotary garden sprinkler - after the water is released any drops come straight out, there is no spiral path. Forty-odd years later I bought a Pitts S1 for myself and a copy of Alan Cassidy's excellent book, Better Aerobatics. In the Practical Theory chapter the Slipstream Effect is described along with the other engine and propeller forces. In fact, in the chapter on Stall Turns (Hammerhead in the USA) the reason given for the need for rudder in the vertical climb is the slipstream effect. The clang of cognitive dissonance rang in my head and I guess I looked on the internet.... One of the things I ran across was an article, comment or blog post by a physicist who was also a pilot saying that he thought that P-factor was a neglible effect! We corresponded and he suggested that I use the Pitts as a platform to try to check. So I did. In a full-power climb (upright) at 70 knots IAS, you have to hold considerable right rudder to maintain heading as you might expect for a 500kg AUW aeroplane with 180 HP. If the rudder is suddenly released the sudden yaw to the left is pronounced, maybe 20-30 degrees and with the wings held level with opposite aileron and with both feet flat on the floor, the yaw continues at about 10 deg/sec and the little thing will complete a full 360 deg flat-turn in not much time at all. The procedure was repeated when inverted, still at 70 knots climbing with full power. Very little rudder pressure is needed to fly straight and when the rudder pedals are released, almost nothing happens! WTF! My S1 has symmetrical wings and the crankshaft angle was about the same above the horizon in both cases, so the downgoing prop blade was getting an equally "bigger bite". And so one gets to thinking of past experiences; trying to make a left hammerhead in a Chipmunk with a left-turning Gipsy Major engine, no success there. And to go right in a Decathlon you have to reduce the power. I am reluctant to try to hammerhead 'against the engine' (to the right) in the Pitts after an instructor demonstrated to me what can go wrong doing this (with some mishandling) in an S2A; an abrupt high negative g entry into an inverted spin! Anyway when you think about it, why do you need rudder to keep going straight up in a vertical climb? There cannot be any assymetric propeller effect in this case, and similarly, why is it much harder to Hammerhead 'against' the engine and prop? It can only be the spiralling slipstream effect as described in the textbooks old and new. The good news is that my results are repeatable and testable (or falsifiable) as the physicists say. Cheers, Forbes

I was just at the National WWII Aviation Museum and a bunch of the staff were talking about your video and trying to figure out how you know so much.

For the P-47 fans out there: https://generalaviationnews.com/2023/08/13/better-than-new-p-47-thunderbolt-debuts-at-oshkosh/

All good from my perspective. If it grows the base and allow you to spend more time on content creation I'm fine with that. Keep up the great work Greg.

I was once making a video for my daughter. She might have been about 6. As she was talking into the camera, she dropped the line "don't forget to l hit the like and subscribe buttons below!"

Be interesting to see if you have a higher new-subscriber:view ratio than usual if you say the general spiel. I gotta be honest though, one of the (many) reasons I enjoy your channel is precisely because you do *not* truck with a lot of the typical youtuber annoyances. Putting it at the end is certainly better than having an opening bit of boilerplate.

I just went bank and "liked" every video of yours that I've ever watched. You just had to ask.

I agree with Clarke Noble, above. I, too, believe that you'll find a classy way of doing this without losing the integrity of your channel, Greg. We understand the environment you are operating in and the need to succeed in that framework. EDIT: Sitting here looking at my R-2800 master rod (GAWD, my wife hates having it in the living room...), anticipating learning new things about engine damage...

If you explain the like and subscribe thing as well as you explain everything else you’ll probably do ok. Alternatively I watched a video for DCS by the Air Warfare Group who said “don’t like and subscribe. Go watch a few more videos and if you decide that you like this and you find value, then come back and become a regular”. I thought that was far more of a compelling message and I actually did like and subscribe to that channel. I always think it’s absurd when a creator posts a click bait title and then tells you in the first five minutes to support them. I trust you’ll find the right way to do it. It won’t offend me.

I think your initial impulse was the correct one, Greg. The audience for your content certainly doesn't have to be told to "like and subscribe" at any point in any of your videos. It's a silly convention. Reminds me of those "Drive safely" signs on the highway.

Greg, as to the "like and subscribe" bit... I think we all understand the "why" behind it. It's the reality of the system your working in whether you like it or not. Even if you do a promo near the end, I think you need to mention it up front at the beginning..... especially since your videos are long-format...which I like. However, if someone happens to miss the last 5 minutes of a 90 minute video because they were interrupted they may not catch the promo you do at the end. To Scarecrow's point, I think I would preface any promo at the beginning of a video by saying "IF" you find that you like this content then please like and subscribe. That way it doesn't sound like you asking for a like before they have consumed it. Finally, I'd like to say that one of the main reasons why your channel has always appealed to me and I'm sure many others is because you prioritize real, factual content over click-bait style marketing and hyperbole. I don't even have a flight simulation game, but I find that listening to your flight sim videos I learn even more history! Anyway, my point is that you need not worry about coming across as some pan-handler salesman. You will find a classy way of soliciting people for their likes and subscribes even if it's just you being yourself, keeping it simple and direct. Afterall, you are selling a product that no one else is. You ought to be proud of the work you've put into it. Those of us here on Patreon are too, or we wouldn't be here. Oh, and at the age of 40 I just recently began flying lessons for my PPL. Pending no interruptions, I hope to be finished perhaps this Fall and then I'd like to knock out an Instrument rating. I'm getting most of it done on weekends when I'm not working. My CFI had quite the pleased look when I demonstrated that I understood density altitude and indicated vs true air speed on my first lesson. Perhaps when the ground classes begin I ought to show up with a copy of Aerodynamics for Naval Aviators. Ha! Thanks!

Greg, I'm looking forward to this video. I'm curious if they ever did similar studies on any of the V12s. Of course we know the cooling system is a weak spot, but I'm curious how the blocks held up to impacts compared to the construction of the radials.

The "like and subscribe" annoys me most when it's at the beginning of the video. Why should I subscribe when I haven't seen any content yet? Angrifies me :-)

go ahead and do it, but please keep it short, no need to drag it on forever

Liked and subscribed! Keep the awesomeness coming. :-)

I think it's worth it just to jog people's memory. I always forget to hit like, so a reminder is usual. Don't leave it too close to the end, else there's not time to hit like before the video's over.