Axis Aircraft Performance Details

[Zipper730]

I was looking at some of the charts & graphs for German and Japanese aircraft. I was thinking of creating some that could convert into English units.

With that said, the biggest problem is language barriers, and also some terminology differences that are used.

Me.109 E-1: W.Nr. 1791

I'm not sure what "Speed difference determined with spatulas and with loose slats". I'd guess slats in and slats out, but I'm honestly not sure. As for the propeller diameter, I'd guess around 3 meters. Top speed is 476 km/h with the slats puttied (I'm guessing closed and sealed up), and 475 km/h with them loose.

Me.109 E-3: W.Nr. 1792

This one doesn't translate too difficult. It's a measurement of performance with and without wing mounted armament. I'm not sure what they mean when they say the dummy gun mounts are covered with deocles, but I figure they cover the barrels.

Bf.109 E-1 W.Nr.1774

This is obviously a performance graph. The Y axis is the altitude, X is speed. I'm not sure what the notations for 0.3, 1.0, 1.1, 1.2, 1.3, 1.4, but it looks like it could be manifold pressure... those numbers look about right. As for the expression P[ws/fpm^2] I'm not sure I even read that off right.

I'm not sure if the text is wöhenlader, but I guess it means flight handling since bodenladen means ground handlers.

BF.109E Climb-Rate Chart

This looks like a climb rate and top-speed graph. From what I translated

1. Anzeige: Display
2. Wirklich: For Real
3. Geschwindigkeit besten Steigens: Best Climb Speed
4. Hochste Waagerechtgeschwindigkeit: Best Horizontal Speed
5. Start: Takeoff (interestingly the Germans, the Russians, and probably most of the Eastern Europeans seem to use the word Start for takeoff. Though with russian it looks like CTAPT)
6. Steigzeit: Rise-Time
7. Steiggeschwindigkeit: Climbing Speed
8. Steiggeschwindigkeit in m/s: Rate of Climb in M/S

DerAdlerIstGelandet , you're fluent in German, so I could use some if I got anything wrong -- Google translate isn't always perfect, but these things seem to add up.

BTW: Who here's fluent in Japanese?

 

[P-39 Expert]

Just google the words on the charts and translate.

 

[tomo pauk]

...
Me.109 E-1: W.Nr. 1791

I'm not sure what "Speed difference determined with spatulas and with loose slats". I'd guess slats in and slats out, but I'm honestly not sure. As for the propeller diameter, I'd guess around 3 meters. Top speed is 476 km/h with the slats puttied (I'm guessing closed and sealed up), and 475 km/h with them loose.

My take is that your last sentence is spot on.

Bf.109 E-1 W.Nr.1774

This is obviously a performance graph. The Y axis is the altitude, X is speed. I'm not sure what the notations for 0.3, 1.0, 1.1, 1.2, 1.3, 1.4, but it looks like it could be manifold pressure... those numbers look about right. As for the expression P[ws/fpm^2] I'm not sure I even read that off right.
I'm not sure if the text is wöhenlader, but I guess it means flight handling since bodenladen means ground handlers.

Indeed, it is not 'wöhenlader', but 'Höhenlader' (the graph print is blurry) - high supercharger gear. 'Bodenlader' = low supercharger speed. Seems like this particular graph is for a Bf 109 powered by experimental version of DB 601 (which one?) with a 2-speed supercharger?
About the 'P' value - yes, it is manifold pressure.
Dashed line represents the speed achievable with engine running at manufacturer-guaranteed power. 'Stoppflug' - speed values that were actually measured.

BF.109E Climb-Rate Chart

This looks like a climb rate and top-speed graph. From what I translated

1. Anzeige: Display
2. Wirklich: For Real
3. Geschwindigkeit besten Steigens: Best Climb Speed
4. Hochste Waagerechtgeschwindigkeit: Best Horizontal Speed
5. Start: Takeoff (interestingly the Germans, the Russians, and probably most of the Eastern Europeans seem to use the word Start for takeoff. Though with russian it looks like CTAPT)
6. Steigzeit: Rise-Time
7. Steiggeschwindigkeit: Climbing Speed
8. Steiggeschwindigkeit in m/s: Rate of Climb in M/S

Anzerige = indicated
Wirklich = true (both terms are for speed here)
Steigzeit = time to climb

You've gotten other terms okay.

BTW: Who here's fluent in Japanese?

Shinpachi.

Just google the words on the charts and translate.

I'd certaily advocate the active apparoach. However, a context also needs to be taken into account.

 

[Zipper730]

Indeed, it is not 'wöhenlader', but 'Höhenlader' (the graph print is blurry) - high supercharger gear. 'Bodenlader' = low supercharger speed.

The Bf.109 either used a single-stage supercharger (earliest models) and a variable-speed torque converter on later models right?

About the 'P' value - yes, it is manifold pressure.

Dashed line represents the speed achievable with engine running at manufacturer-guaranteed power. 'Stoppflug' - speed values that were actually measured.

So, as a general rule, the engines didn't put out the manufacturer-guaranteed power output and stuff?

Anzerige = indicated
Wirklich = true (both terms are for speed here)
Steigzeit = time to climb

Okay, that I get.

I'd certaily advocate the active apparoach. However, a context also needs to be taken into account.

Yeah, some expressions don't always translate right, the British had one "angle of straight climb" (I think it meant a level turn).

Shinpachi , since you're fluent in Japanese, can you help if there's any documents in Japanese?

 

[tomo pauk]

The Bf.109 either used a single-stage supercharger (earliest models) and a variable-speed torque converter on later models right?

Supercharger was always single-stage on engines powering Bf 109. On Jumo 210 engines, it was mostly 2-speed supercharger, while the DB 601 and 605 engines used variable-speed supercharger.
The 2-stage, variable-speed supercharger was on the DB 605L, however that engine was too late for ww2 service.

So, as a general rule, the engines didn't put out the manufacturer-guaranteed power output and stuff?

No wonder for experimental engines, although there was a host of in-servic engines whose power was restricted for reliability reasons, and were fully rated after moths (sometimes many months) of time spend for modifications.

 

[Zipper730]

While this might sound silly: I'm curious if there's any documentation or charts that cover the earliest variants of the Bf.109s. For example the -B's were used during the Spanish Civil War, the -C seemed a short lived development, but the -D's were seen in limited use during the Poland campaign.

on WWII Aircraft Performance, I can find data on the prototypes of the Hurricane and Spitfire before they even put in the twin-pitch and constant-speed propellers.

 

[Zipper730]

Supercharger was always single-stage on engines powering Bf 109.

At least the DB-600, DB-601, DB-605's.

On Jumo 210 engines, it was mostly 2-speed supercharger, while the DB 601 and 605 engines used variable-speed supercharger.

I didn't think many of the Bf.109's other than the D models used those. Regardless, the Me-110's used them.

 

[Zipper730]

What's CINA lag and Stauhaufheizung? Depending on spelling I get Jam Heating or Storage Heating for the latter; the former I have no idea.

http://www.wwiiaircraftperformance.org/me109/me109g.html

 

[tomo pauk]

While this might sound silly: I'm curious if there's any documentation or charts that cover the earliest variants of the Bf.109s. For example the -B's were used during the Spanish Civil War, the -C seemed a short lived development, but the -D's were seen in limited use during the Poland campaign.

There are tables about the early versions in the book by Radinger & Shick.

At least the DB-600, DB-601, DB-605's.
I didn't think many of the Bf.109's other than the D models used those. Regardless, the Me-110's used them.

There was more than 1050 of Jumo-powered Bf 109s produced. table1
Less than 90 Bf 110s produced were powered by Jumo 210. table2
No service-worthy Bf 109 was powered by DB 600, no 'rekord' Bf 109 either.

What's CINA lag and Stauhaufheizung? Depending on spelling I get Jam Heating or Storage Heating for the latter; the former I have no idea.

http://www.wwiiaircraftperformance.org/me109/me109g.html

CINA is 'Commission Internationale de Navigation Aérienne', a.k.a 'International Commission for Air Navigation' - ICAN. 'Lag' means 'lay', or 'is located'. 'Stauaufheizung' = increase of temperature (aufheizung) due to ram effect (stau).

 

[Zipper730]

There are tables about the early versions in the book by Radinger & Shick.

Understood

There was more than 1050 of Jumo-powered Bf 109s produced. table1
Less than 90 Bf 110s produced were powered by Jumo 210. table2

I'll take a look

CINA is 'Commission Internationale de Navigation Aérienne', a.k.a 'International Commission for Air Navigation' - ICAN.

15 C at zero altitude?