Bf109E-3

[Hellbender]

I assume the engine preasure is to high to a long time. Keep it to max 1.25 ATA (so says the manual) while travelling.

[Deadstick]

I assume the engine preasure is to high to a long time. Keep it to max 1.25 ATA (so says the manual) while travelling.

Not sure if that works while climbing though. ATA is (AFAIK), an instrument measuring pressure, kind of like the manifold instrument on Allied aircraft.

As the air gets thinner the higher you go, and as your engine needs air to breath to work efficiently, you will lose power the higher you go.

BUT there were these things called superchargers, which gave the engine extra boost at high altitude.

The 109E had an absolute service ceiling of around 32,000ft (9,700m), and I guess performance was pretty sloppy that high, but you should be able to get to around 20,000ft (6000m) before performance starts dropping off noticeably.

Here is a link to British evaluation tests of captured 109Es: http://kurfurst.org/Tactical_trials/...ls/Morgan.html

The first graph shows climb performance.

[mattag08]

If what you guys are reporting is true about lowering propeller pitch to gain the best speed out of the aircraft then something is wrong. That's anti-thetical to the physics/chemistry of a constant speed prop. A propeller should develop max rated thrust at it's max rated RPM. End of story.

[*Buzzsaw*]

Originally Posted by mattag08

If what you guys are reporting is true about lowering propeller pitch to gain the best speed out of the aircraft then something is wrong. That's anti-thetical to the physics/chemistry of a constant speed prop. A propeller should develop max rated thrust at it's max rated RPM. End of story.

The 109 didn't have a constant speed prop.

[mattag08]

Originally Posted by *Buzzsaw*

The 109 didn't have a constant speed prop.

It's identical for a constant pitch prop too. The pilot just has to do the work is all.

[Corrvan]

Originally Posted by mattag08

If what you guys are reporting is true about lowering propeller pitch to gain the best speed out of the aircraft then something is wrong. That's anti-thetical to the physics/chemistry of a constant speed prop. A propeller should develop max rated thrust at it's max rated RPM. End of story.

Where are you getting this information?
This is completley incorrect in the mooney M20j.

[mattag08]

Originally Posted by Corrvan

Where are you getting this information?
This is completley incorrect in the mooney M20j.

I guess the M20J defies the laws of physics.

[IvanK]

As I understand it the lever currently labelled Mixture control in the BF109E3 was actually there to alter the timing purely to allow burning off the plugs (removing Oil fouling) and was only done on the ground. Once in flight Fuel injection did its thing. In short the 109E3 didnt have any mixture control.



I grew up understanding Max power and Speed was MAX BOOST and MAX RPM

[Kurfürst]

I did some testing with the E-3 today for speed at 0 and 5 km rated altitudes, and climb between 0 and 6000 meter.

Refer below to my findings, compared graphically to the actual Bf 109E Specification sheets of 1939, found here: http://www.kurfurst.org/Performance_...chreibung.html



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