Someone comment on 100 octane aircraft, please!

[notafinger!]

I was getting 290 with Spit & 280 with Hurricane at sea level.

[pupo162]

and it tkaes about 4-5 min to balst up yout engine if you overuse those 12lb pressure. Spit is indeed faster and mroe agile in the 100 octanes, but with great power comes great responsability, and you will need a spare eye too keep the engine cool.

[trademe900]

Originally Posted by pupo162

and it tkaes about 4-5 min to balst up yout engine if you overuse those 12lb pressure. Spit is indeed faster and mroe agile in the 100 octanes, but with great power comes great responsability, and you will need a spare eye too keep the engine cool.

Where did you get this rumor from?

They only said it was not recommended to run for over 5 mins on 12lbs... in actuality, who knows how long it could have gone for. Judging by the conservative nature of most engine manufacturers, probably a lot longer...

[bongodriver]

the manual states 5 min max, this really means you should get 'at least' 5 minutes before engine damage starts to occur.

[Kurfürst]

Originally Posted by bongodriver

the manual states 5 min max, this really means you should get 'at least' 5 minutes before engine damage starts to occur.

Provided the safe coolant and oil temperature limits are observed / can be maintained. Given that +12 lbs develops 30% more power than what the cooling system was sized for, there may have been issues with that.

Are there any cooling trials for the Spitfire I/II?

[Osprey]

I suspect I am doing something wrong tbh, the behaviour of the power, RPM and mixture is different than before so it's like learning as a beginner.

[AbortedMan]

Originally Posted by Osprey

I suspect I am doing something wrong tbh, the behaviour of the power, RPM and mixture is different than before so it's like learning as a beginner.

Sort it out before Mission 2 begins, man!

[bongodriver]

Originally Posted by Kurfürst

Provided the safe coolant and oil temperature limits are observed / can be maintained. Given that +12 lbs develops 30% more power than what the cooling system was sized for, there may have been issues with that.

Are there any cooling trials for the Spitfire I/II?

I don't know of any myself but then I am not a great one for collecting data, annecdotally the Spitfires had no issues with cooling once airborne and would maintain stable temps at full throttle with rads closed, so I see no reason temps would change the 5 min limit, I think the failure times should be randomised somewhat to make it much more like real life, but with 'hard coded' limits you just get an engine that goes 'bang' exactly on time, let's face it, there are many many stories of aircraft returning home with massive amounts of battle damage to the engine and they kept running and they certainly werent designed to run under those conditions.

[Ernst]

5 or 3 minutes? I remember manuals saying 3 minutes. Now is 5?

[pupo162]

Originally Posted by trademe900

Where did you get this rumor from?

not a roumor, i jsut decided to have a fight with a friend. he was a i na E4 i was in a spitII. It was a more or less even fight, he could still zoom higher than me, but i could keep enough energy to avoid him, and take some peashots at him. after about 5 min of fight, we both had hit each other, we was leaking coolant and i had some holes in the wing. then my engine failed. He did it quite sometimes, if you dont master time management and dotn have a sharp eye, 12lb boost is not for you.