No problem, I actually missed out so many things - so I`m glad it is still interesting. However I`ll make lots of short videos rather than try to do everything in one huge video, which is too difficult to do in 1-take and too long to watch ! - There are a lot more to come soon.
@@CalumDouglas You could also just edit the video and cut the video so that it includes all the good parts out of the "bad takes" so that you can still mess up and not have to retake everything, or you can also redo things, or add things.
@@CalumDouglas you are a geant thank you a lot idid come now from military aviation history watching u uare the best please keep up the great work.iwish u all the succes mate
Great book, got it on my birthday, I really enjoyed every page. Thank you Mr. Douglas for doing this deep dive into aero engines. But what I never understood and please help me if I am wrong, but why did those engines have such a conservative output per litre? Just as example: DB 605AM engine "Sondernotleistung" which means full pelt + MW50 is 1800HP/35,7L=50,4 HP/L. The "Dauerleistung" which is the continous power output is 1080HP/35,7=30,2HP/L. That is not much. Even the KdF Wagen aka Beetle had 22HP/L in its initial stage. My first VW Golf MK1 1983 had 4 zyl 1.1L 8Valve and managed 50HP naturally aspirated. Now I drive a 1990 Corrado G60 1.8L and it does easily 100 HP/L all day long using basically same octane fuel (102ROZ) as the DB605, but this VW engine (EA827) is a most poorly designed counterflow cylinder head with two valves, single ignition and a mechanically driven supercharger. So it has all the outdated things combined to get the cheapest engine but it still has double or triple the specific output of a DB605 going plaid. How is this even remotely possible? Please help me there must have been a limit in those days which clearly escaped me (except the lack of Ni). Btw the specific output of a Merlin was higher at ~ 62,9HP/L full pelt and ~ 46,4HP/L continous -ish.
Dear Sir Douglas, Your explanation towards single and variable speed superchargers was very informing. I'm working on achieving my Powerplant Certification. By far my favorite class, I have taken, was reciprocating overhaul. It's amazing what the components look like and how they are operate in harmony. I have taken it upon myself to read the Continental Overhaul Manual to obtain a better understanding behind the principles of the supercharger. I now have a deeper appreciation for engineers and understand that what they have invented is a true engineering marvel. Aviation is proof that given, the will, we have the capacity to achieve the impossible. Again thank you so kindly for the summary.
If you allow me, hard as it may sound, WAR is a creator of technology, 90% of the technical advances were first developed for a warlike purpose, then massified
Обърнат на доло цилиндрите се смазват добре и се охлаждат буталата. Предотвратява блукаж - заклинване. За високи обороти във полет е добро решение за веобразния двигател.
I am reading your book. I am about 1/2 wat through and I have a question. Why did the DB 601 engine have two different compression ratios, one for each bank of cylinders. You mentioned it but I don't remember an explaination.
Would an over-pressure valve have worked if it let air out at 1 bar- or would that have messed up airflow to the pistons too much?. Great video-thanks. The book is absolutely brilliant. Well worth the money.
There are two problems with using a boost dump valve, one is that most engines had carburettors so you dump fuel... wasteful and potentially dangerous. Secondly dumping boost AFTER you`ve already made it, doesnt get you out of the power loss to the compressor, so yes it would work to avoid over-boosting the engine, but wont work to reduce how much power the compressor saps from the crankshaft.
I'm subscribed to you on Twitter but hearing you for the first time. Funny enough, our voices sound similar (if I had your regional accent). Must be due to our shared ancestral heritage :P My mother's side is Scotland/England (and a tiny bit of Irish).
All into the lingo ... Super charger , chargers blowers .. In in Britain a blower or charger In German it’s called a lader. .. the turbo super charger is a gas driven unit. The super charger is a mechanical driven . But a charger is the same as a super charger like wise the blower . Crazy it is.
Absolutely amazing book and very well written so draws you in to the story.
I recently bought your book and it’s incredible! Thanks for all your work to make this information accessible ❤
I bought your book last year. Superb!!!
Just received your book, really looking forward to it.
Reading it now, a lot of info to digest
Best video concerning chargers !
Thank's for all that.
Thanks you for this video Calum, it's a really nice explanation about this complex mechanics.
No problem, I actually missed out so many things - so I`m glad it is still interesting. However I`ll make lots of short videos rather than try to do everything in one huge video, which is too difficult to do in 1-take and too long to watch ! - There are a lot more to come soon.
@@CalumDouglas You could also just edit the video and cut the video so that it includes all the good parts out of the "bad takes" so that you can still mess up and not have to retake everything, or you can also redo things, or add things.
@@CalumDouglas you are a geant thank you a lot idid come now from military aviation history watching u uare the best please keep up the great work.iwish u all the succes mate
Great book, got it on my birthday, I really enjoyed every page. Thank you Mr. Douglas for doing this deep dive into aero engines.
But what I never understood and please help me if I am wrong, but why did those engines have such a conservative output per litre?
Just as example: DB 605AM engine "Sondernotleistung" which means full pelt + MW50 is 1800HP/35,7L=50,4 HP/L. The "Dauerleistung" which is the continous power output is 1080HP/35,7=30,2HP/L. That is not much. Even the KdF Wagen aka Beetle had 22HP/L in its initial stage. My first VW Golf MK1 1983 had 4 zyl 1.1L 8Valve and managed 50HP naturally aspirated. Now I drive a 1990 Corrado G60 1.8L and it does easily 100 HP/L all day long using basically same octane fuel (102ROZ) as the DB605, but this VW engine (EA827) is a most poorly designed counterflow cylinder head with two valves, single ignition and a mechanically driven supercharger. So it has all the outdated things combined to get the cheapest engine but it still has double or triple the specific output of a DB605 going plaid. How is this even remotely possible? Please help me there must have been a limit in those days which clearly escaped me (except the lack of Ni).
Btw the specific output of a Merlin was higher at ~ 62,9HP/L full pelt and ~ 46,4HP/L continous -ish.
Dear Sir Douglas,
Your explanation towards single and variable speed superchargers was very informing. I'm working on achieving my Powerplant Certification. By far my favorite class, I have taken, was reciprocating overhaul. It's amazing what the components look like and how they are operate in harmony. I have taken it upon myself to read the Continental Overhaul Manual to obtain a better understanding behind the principles of the supercharger. I now have a deeper appreciation for engineers and understand that what they have invented is a true engineering marvel. Aviation is proof that given, the will, we have the capacity to achieve the impossible. Again thank you so kindly for the summary.
If you allow me, hard as it may sound, WAR is a creator of technology, 90% of the technical advances were first developed for a warlike purpose, then massified
Still a relevant and great video. I’m new to your channel, and am hoping to see something about the Allison V-1710
Dont worry about lighting and sound its perfect.
Nice video! Really instructive and useful! Thx!
Great video man!
Обърнат на доло цилиндрите се смазват добре и се охлаждат буталата. Предотвратява блукаж - заклинване. За високи обороти във полет е добро решение за веобразния двигател.
I am reading your book. I am about 1/2 wat through and I have a question. Why did the DB 601 engine have two different compression ratios, one for each bank of cylinders. You mentioned it but I don't remember an explaination.
Finish the book.... 😉
Would an over-pressure valve have worked if it let air out at 1 bar- or would that have messed up airflow to the pistons too much?. Great video-thanks. The book is absolutely brilliant. Well worth the money.
There are two problems with using a boost dump valve, one is that most engines had carburettors so you dump fuel... wasteful and potentially dangerous. Secondly dumping boost AFTER you`ve already made it, doesnt get you out of the power loss to the compressor, so yes it would work to avoid over-boosting the engine, but wont work to reduce how much power the compressor saps from the crankshaft.
@@CalumDouglas enter the two speed or variable speed supercharger drive
@@timbo19751975enter turbocharger.
German pilot: engages spitfire at supercharger shift altitude
Spitfire pilot: welp guess i'll die
I'm subscribed to you on Twitter but hearing you for the first time. Funny enough, our voices sound similar (if I had your regional accent). Must be due to our shared ancestral heritage :P My mother's side is Scotland/England (and a tiny bit of Irish).
All into the lingo ...
Super charger , chargers blowers ..
In in Britain a blower or charger
In German it’s called a lader. .. the turbo super charger is a gas driven unit. The super charger is a mechanical driven .
But a charger is the same as a super charger like wise the blower .
Crazy it is.
Thanks for that.
we love u man u are the best.