Recent content by donkeyking

Hi GregP, I still can't understand the following you told to me. Is the higher or medium RPM relative speed or absolute speed? For example, there two engines, Engine A and B. Their displacements are same, but rpm are different. Engine A, the highest RPM is 600. Engine B, the highest RPM is...

hi caman, do your know your engine's compression ratio? maybe it is not very high

thanks GregP. it is very useful

Does engine knock occur more easily at low RPM? and why? thanks

Hi Greg In WWII, was German injection engine better for prevention ping than allies' carburetor engine? Thanks

Do they use Nitromethane?

F1 cars just use 95 to 102 RON octane fuel! I always think they are using 150 MON octane at least.

What sort of octane level is F1 fuel ? and How is F1 engine compression ratio? Thanks

Thanks your reply. Another question: why does diesel engine not react fast for throttle changes?

I'm quite wondering why aero diesel engine wasn't popular like avgas engine in WWII. I know a main advantage the diesel engine has much higher compression ratio than avgas engine. What disadvantages were aero diesel engine in WWII? Thanks

Dave Of course, They wouldn't get help of chain home radars, it would be an main disadvantage. But if allies were still in Dunkirk, Luftwaffe couldn't move their air base to the north of France as BOB. Their air base would be still in Germany. When Luftwaffe had come to Dunkirk from Germany...

Thanks Mike, your information is very appreciated

Hi Short I know there would be a huge logistic problem if they want to fight in Dunkirk. But it is not only for Allies but also for German. And then there would be some advantages in allies. The first, allied navy can support their army. The British and France has a lot of battleships and...

From 26 May 1940–4 June 1940, allies evacuated 330,000 of 400,000 from Dunkirk. Whatever it is not a bad result from the current point view. But in evacuation, allies had to abandon huge heavy weapons and equipment. These troops couldn’t fight again in short time because of without these...

Thanks Ivan and shortround6 I learned a lot of about compression ratio and supercharger from your replies