109 e4 performance - Page 6

Crumpp · #51 10-26-2011, 05:15 PM

Quote:

Can you please convert 990 mmHg to ata for us please

About 1.28 ata....

Robo. · #52 10-26-2011, 05:16 PM

Quote:

Originally Posted by Crumpp

Sure it would be able too. All aircraft performance is a percentage range over a mean average.

Are we still talking about horizontal flight?

Robo. · #53 10-26-2011, 05:17 PM

Quote:

Originally Posted by Crumpp

You don't have to explain it to me, it is in black and white what Mtt says.

Being an experienced pilot, multiple aircraft owner, and having graduated college with a degree in Aeronautical Science, I can decide for myself what is optimistic and what is not.

Thanks!

So you asked me about my background so you can share yours? You're a very nice person Crumpp, it's a pleasure talking to you.

Robo. · #54 10-26-2011, 05:18 PM

Quote:

Originally Posted by Crumpp

About 1.28 ata....

So it probably won't be atmostperic pressure at 0m then but rather MFP.

Crumpp · #55 10-26-2011, 05:19 PM

Exactly my brother....

That French data does not appear to have been converted to standard conditions. They list the conditions though it won't be hard to convert. If someone else does not get around to it, I will do it later when I get home for you guys.

Robo. · #56 10-26-2011, 05:22 PM

Quote:

Originally Posted by Crumpp

Exactly my brother....

So 41Sqn_Stormcrow was not confusing MFP for atmospheric pressure as you suggested and he was basically right?

Crumpp · #57 10-26-2011, 05:25 PM

No he is not confused but he did stumble on the issue of the atmospheric conditions.

That data was taken on a colder than standard day. Breaking that down, the level speeds will be slower than standard and the climb rate will be higher than standard.

Kwiatek · #58 10-26-2011, 05:30 PM

Quote:

Originally Posted by Crumpp

About 1.28 ata....

990 mmHg mainfold preassure is 1.34 Ata

and

500 km/h at sea level for 109 E-3 is the best score i have seen in data (German manual). Others are less optimistic.

Robo. · #59 10-26-2011, 05:40 PM

Quote:

Originally Posted by Kwiatek

990 mmHg mainfold preassure is 1.34 Ata

Strange, such a nice guy, experienced pilot, multiple aircraft owner who graduated college with a degree in Aeronautical Science said that was atmospheric pressure at 0m.

CaptainDoggles · #60 10-26-2011, 05:56 PM

Quote:

Originally Posted by Robo.

Strange, such a nice guy, experienced pilot, multiple aircraft owner who graduated college with a degree in Aeronautical Science said that was atmospheric pressure at 0m.

Uh, I don't think that's what he said.

Pression d'admission is french for manifold pressure and it's this value that is 990 torr at sea level, not atmospheric pressure (760 torr). The 109 is supercharged, so the pressure in the intake manifold is delivered above atmospheric.