Thank you Jon. I hope to have it up within the next 10 days. I'll be riding on a flight to Europe a bit later today, which should give me a lot of time in a seat to work on it.

Thanks Nick, it's one of my early videos. I plan to re record it soon.

Oh thanks. I really love WW1 planes, and I'll make more WW1 videos.

Your WW2 plane ones are also very good. Looking forward to the FW190 Dora one. :-)

Thanks JT.

Silent still

Some people insist on installing auto engines on experimental category aircraft. They are usually surprised and disappointed when the auto engine is shot after only 100 flight hours and have to switch to a Lycoming or Continental. The price of this lesson is every penny they invested in altering the auto engine to install it in their little bird.

Hi Frank, thanks for visiting my channel. This particular video isn't watched too often.

@@GregsAirplanesandAutomobiles Hi Greg, I will probably end up watching all of them 😁 I drive a 2008 Fiat Bravo with the 1.4 T-jet engine, which has been remapped to 172 hp. Very nice car, especially after remapping 😏

It's coming out of the rear speakers on my 5.1 setup, same as the start of the F4F video.

Greg needs to repost this with a better audio

The problem is left channel and right channel are out of phase, so if you listen in mono they cancel out... Greg just needs to swap one channel phase, or utilize , say , left channel as mono channel.

No audio whatsoever through my android phone

@@MrStr8den BRO SAME

Yup, I think that would work well.

I agree, at least if we are assuming it has the BMW engine.

Troy Tempest I have certainly seen repeated statements,period stuff,stating precisely that. Still,the few Royal Navy pilots who were issued the Sopwith Triplane absolutely adored that design. Since it certainly predates the DVII,probably not quite as good,but it would be spectacular to see a flyoff with modern recreations of each. That thick wing of the DVII was an innovation Anthony Fokker deservedly took accolades for. The Wright brothers information was finally superseded . Not their fault, their self designed wind tunnel was so tiny there were serious scale effects. Fokker to my knowledge broke aviation out of that level of understanding.

It's vegetable dye camouflage instead of paint which was heavy and scarce in Germany. I can see how it works from above since the polygons resemble fields, but I have never got the pinks, tans and pale greens of the bottom pattern.

Thanks for the info.

Its the Lozenge Camo! There are some variations of lozenge camo in WWI

In video. Just out of phase.

The first few videos here seem to be fine on PC or Android, but certain apple operating systems have a problem. I don't get it, but that's the deal.

Thanks, Gregg. I'm traveling, so I'll watch it on the PC when I get off back to the house. I've spent many an hour playing the DVII on 'Red Baron' back in the day, so the interest is high.. you are also a phenomenal educator on aviation topics, so I'm sure it'll be worth the wait.

Edit: fixed it! On iOS, going to 'accessibility' gives you the option to disable mono output. Doing that and setting the output to full left or right channel allows me to hear the commentary, albeit a bit softly. I suspect there's a phase imbalance between the channels which causes them to cancel each other out. Thanks again!

@@GregsAirplanesandAutomobiles Android user here; no sound.

Thanks, I'll redo it.

@@GregsAirplanesandAutomobiles Well,,, We're waiting!😎

They work fine on both my cell phone and my computer.

If your phone has stereo speakers you'll be able to hear the audio. If it only has a single speaker you won't. Apparently lots of phones these days do have stereo speakers, see hub.91mobiles.com/top-smartphones-with-stereo-speakers/ To make these tests I used a pair of Sony headphones that have a built in stereo/mono switch on the plug. When I switch them to mono the audio entirely disappears. Trust us, we're not imagining this.

@@GregsAirplanesandAutomobiles On my phone I cant hear the video and on my laptop the audio is very low. I have a Samsung Galaxy J3 and a Acer Aspire A515-51G-58VH

@@GregsAirplanesandAutomobiles They're right. The audio is messed up.

Greg needs to repost this with a better quality audio

Hi Claude, I'm going to have to remake these earliy videos. The first few were made using Microsoft's Movie Maker, and for some reason the audio doesn't work on certain products. I have no idea why. I'll remake them soon.

It's actually possible to trace the Spad directly back to the Wright flyer. Maybe I'll touch on that in an upcoming early aviation video.

All the pictures in this video are either screenshots from ROF or free to use images from wiki commons. I'll probably do a video on the Hispano Suiza V8 engine and include what little info I can get on McCudden's modifications.

I don't have a picture of that. I'm not sure if I'm remembering correctly, but I don't think it's literally two different throttle plates. It might be one, but with the primary lever having limited ability to open it. In other words, the first level provides something like 60% fully open and the second lever provides the rest.

1. Today we see 12:1 compression in quite a few automotive performance engines. 2. yes, just one a time though: kzfaq.info/get/bejne/hLShoLGixsDQe3U.html 3. Yes

thanks. I've learned more about engines from watching you talk only indirectly about them in your videos than at any other time in my life.

There is a simpler way to use excessively high compression ratio all by itself. Ditch the turbo, because turbochargers generate boost and heat, both of which require lower compression ratios. Lycoming turbocharged engines run 7-7.5 compression and their regular engines use 8-8.5 to one ratio. Simply use very high compression ratios such as 12:1 or even 13:1 in conjunction with An ECM/FADEC and electronic throttle body. Where the pilot selects maximum power, and the computer/electronic throttle only opens part way below a certain altitude. It could be programmed/mapped based on air density and temperature, and utilize knock sensors. Then the Pilot is hands free, and the engine will maintain some flat-rated power up to 5,000ft or so where the throttle goes wide open. Many Experimenral aircraft are already running 10:1 and even 11:1 compression ratios with Lycoming 360s and 100/130-octane fuel. (Blue 100LL). So upping compression to 12:1 seams reasonable with modern EFI/ECUs such as MoTeC. Edit* All of this will only gain a small amount of additional power, maybe 10hp, which is actually never used, because of the throttle not opening all the way at low altitude. Its just an additional 10hp than stock at 5,000ft density altitude, where pilots need it for hot&high takeoffs. It also allows crusing at higher altitude. Maybe up to 12,500' vs 7,500' where it can still maintain 75% cruise power, 4-5k higher up, and have less drag more speed for the same fuel, therefore longer range and better economy. Not more power.

@@TheJustinJ That would work too.

Yup, aircraft engines have huge amounts of torque. Figure out the torque of a 2600hp P-47 at 2700rpm. It's pretty crazy.

@@GregsAirplanesandAutomobiles It's a wonder the airplane doesn't flip over! I can see the benefit of counter rotating props now.

Thanks Paul. In Rise of Flight, it seems that once the 7F's engine is damaged it looses any advantage in power it may have had. At that point, it's a turn fighter. The CLII's 200hp Mercedes' engine isn't set up correctly in ROF. I would need to do a whole video on this to explain it, but the short version is that in ROF, with that airplane you just forget it has an altitude throttle and operated it as any other airplane and ignore the pining sounds.

I don't know of a single WW2 fighter set up that way.

Greg's Airplanes and Automobiles Me neither. You are smart enough to take an educated guess on why it was never tried. It seems the smart way to go with a flat cylinder head and cross flow with more valve area than piston area.

it's not quiet, it's just rhe sounds cancel each other. It's normal with stereo

Thanks, I'll try to do better on the graphs

I have wondered the same thing. Surely it would be very hard to hear, especially with the unmuffled exhaust so close. I think they used pre set amounts of throttle at given altitudes which were known to be safe. For example don't open the aux throttle more than 1/2 way below XXX meters and so on.

Yes, I know how the WW2 stuff works, but they used supercharging, which is quite a bit different and covered here in other videos. The point here is that this engine was a true altitude engine and without supercharging. As for knock, my explanation was accurate and adequate enough for this video, since it's not a video about knock, or combustion chamber design. Here is the official definition of detonation from the PHOAK: Detonation. "The sudden release of heat energy from fuel in an aircraft engine caused by the fuel-air mixture reaching its critical pressure and temperature. Detonation occurs as a violent explosion rather than a smooth burning process." That's entirely in harmony with what I said in the video. Of course I could have gone into it farther, but it wasn't my focus. These videos have to end at some point.

The term "violent explosion" is misleading. It implies very high pressures. That is not the case.

@joe jitsu I do not know how you want to define explosion, but you can see how wikipidia defines it with a quick search. Combustion in an engine under knock conditions is not an explosion, based on the above definition. You almost got it right. A good diagram of combustion under knock is shown here, look at his figure 2. autoelexblog.blogspot.com/2014/05/combustion-pressure-measurement-for.html The combustion under knock creates these pressure waves, as you said. But not higher pressures and temperatures. You note that two of the cylinders in his figure 2 knock, the other two don't. You also note that the cylinder pressure is higher in the two that do knock. Often people make the wrong conclusion, thinking that knock causes the high pressures. In fact, it is the opposite. The high pressure causes the knock. In this case, the cylinders that knock seem to start combustion earlier (more advanced timing) creating the high pressure (and temperature) that caused the knock. Rewording: the more advanced timing in these cylinders, as shown in the graph, caused the higher pressures, which in turn caused the cylinders to knock. For example, if one supplied to this engine higher octane fuel in the same conditions, these two cylinders would still have higher pressures, but the wave in the combustion would not exist (i.e., no knock), and the sound would also go away. Now, you may say that timing is the same for all cylinders (referring to the example I brought up). But that is not necessarily true. Not only there can be tolerances in distributors, but the early part of combustion is very unpredictable and depending on in cylinder turbulence, which varies from cylinder to cylinder. In other words, the spark may have taken place in almost the same time in all cylinders, but two of them picked up combustion faster due to different turbulence characteristics and built up higher pressure, as a result. An engine that has fewer of these variations will make more power because you will be able to tune timing ideal for all cylinders. I had heard that NASCAR builds distributor caps customized for each engine, moving the timing around for each cylinder independently to reach optimum power. That would be of course fruitful in an old style crappy American V8 that has terrible manufacturing tolerances. Now, why knock can be damaging to the engine? It is not the excess pressures or temperatures. It is the fact that these pressure waves increase the heat transfer coefficient between your metal surfaces and the gasses (as you know, the gasses always reach peak temperature much higher than the melting temperature of the aluminum, but because the temperature lasts such a brief time, the aluminum never gets too hot). This higher heat transfer coefficient reduces the thermal efficiency of the engine because the heat is lost to the metal parts, and of course, risks melting the piston (or better, it weakens the piston because the temperature gets too close to the melting point, so the loads of combustion and inertia can crack it). The sound you hear is actually these pressure waves you see in the graph. Knock theory was first introduced by Sir Harry Ricardo ....I think Craig has taken references from his book "The high speed internal combustion engine".

​@joe jitsu You typed a lot, but added nothing to the discussion. Most of your what you are trying to say is wrong. Just read what I wrote earlier. Your misconceptions are explained in my previous post. If you still don't get it, can't help you any further.

Turn it up.

@@GregsAirplanesandAutomobiles 😭 it's maxed! When the advert kicks in at the end I will probably jump out of my skin...😨 Any chance of fixing these videos please?

It's there, it's just very low volume on some devices. I'll re record it at some point.

1.0142777265087 ! Good job with accuracy. You get a gold star.

Hi Herman, it seems to be an iphone issue with my early videos. I'll have to re do all the audio, and I'm not sure it's worth doing that. The video will work on PC, Android, or Ipad.

Thanks, but it does have sound. For some reason the first few videos I put up have really low sound on some devices, but it works on Android and Windows just fine, as well as my Ipad.

@@GregsAirplanesandAutomobiles my phone is android but no sound

Thanks, it's on the list of things to do. The first few videos I made have this issue, they work fine on a PC, Android, or Ipad, but for some reason on an I phone there isn't enough volume.

I use a PC. Don't talk to me about i phonies.@@GregsAirplanesandAutomobiles

Go see a doctor.

I will redo this video, and I'll probably combine both parts while I'm at it. You can expect that next month.

@@GregsAirplanesandAutomobiles seriously? Thank you sir. These look interesting and the comments seem to hint at something interesting going on in engine technology. Maybe not as interesting as that Connie's engine with the exhaust compounding impeller thing you mentioned that almost gave me a headache trying to visualize how in the hell they gained horsepower at the crank with it. Best guess is there are shafts running from each turbine(?)/collector(?) right onto some kind of cut gear that actually literally *is* _on_ the crank itself maybe? Might be an interesting short video you could actually pull off some day explaining that particular piece of engineering wizardry. You da man Greg!👍

I promise you the sound works, you just need to turn up the volume a lot. The first four or so videos I made have a lower sound level, but they do work just fine.

Greg's Airplanes and Automobiles you are correct! i tried again with headphones and can hear.

@@GregsAirplanesandAutomobiles sounds maxed out and still nothing

That really depends on your definition of average automobile. 45 MPH (Model T) 70 MPH (Cadillac 30/Packard Twin 6) 80 MPH (Stutz Bearcat). My guess is the average sedan could go 50-60 MPH but don't quote me on that, I'm no expert. Many manufacturers didn't even list their top speeds, since how fast you could go was really limited by the roads of the time.

@@jamesbarca7229 Yes indeed. And the tire technology. Tires right into the late 1920s only lasted some 5000 miles or so. Sidewalls were so weak that winter driving in ice crusted snow significantly shortened their lifespan. I am in possession of an incomplete 1925 book set that describes how to use old tire carcasses as winter shoes to minimize damage. Motorcycle board track racers had terrible crashes in excess of 100 mph,usually through tire failure. It really took Eisenhower as President, post WW2 to significantly improve the US highway system,although local jurisdictions did much after 1925. Cheers.

OK

I agree. I am somewhat amazed by the Germans. Compared to most other countries, take Spain for example, Germany is in a poor location for weather and access to sea ports. Few natural resources other than wood and and some coal, difficult farm land and a short growing season. Yet the Germans consistently lead Europe and the world in nearly every category involving industry and quality of living. Looked at another way, the Allies bombed Germany into rubble in WW2 and two years later they were exporting Volkswagons. Compare that to Iraq, which was hit with precision guided munitions taking almost nothing but military targets, and 20 years later it's still in shambles. Germany is pretty impressive.

Thanks for your affirmative reply. I hope the Germans' capability of producing weapons will never be used in this century again.

@@GregsAirplanesandAutomobiles You have to put things in perspective though, yes the German people were willing but they needed a lot of help initially to achieve "The Miracle on the Rhine" and that meant the support of the allies but to address your one example about Volkswagons that would not have happened had it not been for the intervention of one Major Ivan Hirst :- www.thelocal.de/20150925/the-brit-who-saved-vw-after-the-war

I am going to re record it.

@@GregsAirplanesandAutomobiles You don't need to. You can edit the audio in an audio editing program. I think it's going to be easier this way. one of the stereo channels gets dumped, the other is kept and assigned to both left and right channels in the new audio track. Perfect Mono sound. Alternatively, since I suspect that the stereo effect is done from an originally mono source and then stereo-ized by applying some delay on one of the channels, , you can eliminate the delay and then you'll have the same effect. I loved the gothic fonts in the graphs by the way. Very nice touch :).

Do you have a volume control? I am seriously asking because I can hear it fine on my desktop, Android phone, and Ipad, but I do have to turn it up.

Greg's Airplanes and Automobiles 🚗 I’m watching on an iPad mini. Volume turned all the way up, but sounds like Headphones turned all the way up but on the table lol. Cross verified on different videos.

I need to re record this one. It's one of my early videos recorded with microsoft media maker.

You might be right, I simply have no idea. The way I see it, as long as you understand what I'm talking about, we are good.

Thank you Greg! I do enjoy the videos, please keep on doing them. I researched the Foaker vs. Fokker point, you can hear both, but I'll stay with the short 'o'. Thanks again -- Patrick, UK

It works here, I just checked it.

In order to keep the tip speeds of the propeller low enough.

@@GregsAirplanesandAutomobiles i see... but why not just different reduction gear ratio?

The engine in this video doesn't have a reduction ratio. As with most planes of the era, the prop is connected directly to the crankshaft. Now most WW2 fighters do have reduction ratios, but the engines are huge. As an example there were engines with over 2000 cubic inches (over 35 liters) that would rev to 3000rpm. If you work out the piston speeds that's really fast for such big parts. As an example a Thunderbolts 2800 cubic inch engine has twice the pistons speed of a Ford Mustang's 302 (60's car) at a given rpm.

@@GregsAirplanesandAutomobiles ah ok thanks.

Also, propellers start to lose efficiency above about 2500rpm, and that really drops off fast above 3500. As to why no gearing, engineering of aviation gearboxes is still something that needs to be taken seriously today, and in 1918 it's probable that they just couldn't get one to work reliably without being unreasonably heavy.

You got that right!

Yes, I think it could have gone somewhere, especially for fuel economy.

@@GregsAirplanesandAutomobiles When I was involved in working some NASCAR engine stuff. The early restrictor plate engines had ridiculously high compression ratios. They also had 390 cfm carbs on them. You had to the the rpms above a certain level after they were hot from running full throttle when you made a pit stop. If you didn’t it would get enough cylinder pressure to run into detonation. You saw most engine failures right after pitstops if you let the motor bog down when you let the clutch out. Now with fuel injection and limited compression ratios they are much more reliable.

I'll remake it.

Yes there is. I tested on a laptop, Ipad, and Android. It's low, so you have to turn it up, but it's there I promise :)

CONTEXT. It amazes me how many intelligent people can't understand this concept. We are not talking about stationary engines to power a saw-mill here.

Sergeant Cedric Popkin wacked the Baron with a .30cal from the ground. Look into it. I am convinced. I know the pilots out there will probably be offended that a mud bug brought his reign of terror to an end but it is most probable that is what happened.

@@sadwingsraging3044 You may be right. I don't know. I believe, towards the end, Richthofen became fatalistically jaded. His decision to chase the egressing young pilot to the deck over enemy territory isn't one he'd have made six months earlier. ....And besides, as his wingman, I'd have straffed the area as we decended, likey sending the lucky ground pounder ducking for cover.

@@johntempest267 😂more lambs to the Anti-aircraft slaughter!😉 Just like shooting a skeet with a .22 rifle.💲 Back when I played video games I was probably the best and most dedicated antiaircraft gun pilot in the game. Didn't take me too long to figure out that the P-51 Pwnstang in the right hands would dominate the game so I found it quite enjoyable to plant my arse on and fly an AA gun!🙄 Once I found the Forgotten Hope mod and their Flakvierling 38 it was love at first sight.😍

Was there are sleeve valve engine in this video?

@@GregsAirplanesandAutomobiles When I was in England in the late 1970s,I met an interesting man in the pub at Bisley who had a pre WW2 French Panhard car with a sleeve valve engine. I think it was a licensed Knight design,and he brought it the next week we went shooting there. It was unusually quiet for the era,although he mentioned that it smoked terribly despite considerable effort on his part. I do remember him saying that well to do people bought these expensive engines precisely because they were sold as being unusually quiet. Good torque at low rpm a selling point as well. FWIW.

I got no sound on mobile, but on PC it's fine

Gotta use something with dual channel, like earbuds or headphones