Author Topic: A luftwaffe question  (Read 737 times)

Offline Seeker

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A luftwaffe question
« on: March 13, 2001, 04:00:00 AM »
I'm directing this to the Luftwobbles as they seem to be the best informed and most vociferous clique in AH, but it could equally apply to others.

I've been reading that the Me109 had no internal trim controls, while the Fw series had electric tail trimming meaning that the plane didn't need constant  triming due to speed changes.

I find it odd the heated arguments over 5 to 15 miles an hour top speed when this issue's ignored.

Shouldn't trim be set before take off in the 109, and the Fw have auto elevator trim as the only option? After all, it seems that we're all after realism in plane modeling, if not in game play; and it strikes me as odd that planes such as the 109 have cockpit trim. Wasn't that one of the great claims of the Mustang, that it was one of the first, if not the first to have cockpit trim?

If the Luftwaffe are happy with modified trim why aren't they happy with modified engine performance?

(For what it's worth I think the Spit had only tail trim, not alerion trim, but hopefully some one who really knows will put me right).

Offline Raubvogel

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« Reply #1 on: March 13, 2001, 05:32:00 AM »
Ok, I can't speak for the Allied planes ,because I have no idea, but the 109 did have elevator trim and that is it. It had no rudder trim which meant that the pilots legs became fatigued on long flights. Overall, i think the importance of trim is overmagnified in flight sims.  Yes, on long cross country flights it saved a great deal of pilot workload, but it did not make the difference in combat that some would have you believe it did. i.e. I know how to trim my aircraft so I am superior. Yes, a properly trimmed aircraft with less yaw will bleed less E, but I really don't think it was the deciding factor that it has been made out to be.

Offline Purzel

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A luftwaffe question
« Reply #2 on: March 13, 2001, 05:44:00 AM »
Hi!

Raubvolgel is right. As well as that Andy Bush stated on this board that the trimming of an airplane has as much effect on the outcoming of a dogfight as the color of the pilots hair. At least in RL.

Additionally the trimming in this Sim doesnt work the way trimming works in RL since the Joysticks here even dont work as the sticks in RL - at least when it comes to what trimming is used for to counter (Joysticks always spring back to the center - FF too).

So after all, flying an untrimmed plane may be uncomfortable, but prolly wont change the outcome of a fight.

Hope this helps...



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Offline Effdub

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A luftwaffe question
« Reply #3 on: March 13, 2001, 08:55:00 AM »
I remember reading about a german 109 pilot who used to trim "nose high".

He had to apply stick pressure for level flight, but put up with that since his trimming would allow faster turning.

In other words: trimming was more important to RL pilots than you guys think  

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Offline Naudet

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A luftwaffe question
« Reply #4 on: March 13, 2001, 09:09:00 AM »
THe Me109 had cockpit controlled trim tabs. And u really need them, cause this bird has big torque and comprasion probs.

But the FW190 had no aileron or rudder trim from inside the cockpit. The FW190 had only the elevator trimmer to trim it out for climb or dive. Every pilot that ever flew a FW190 found out that it needed no retrimming in the air, cause the torque and or speed effects were so small that the could be forgot. Only when the ground crew did a real bad job on the trim tabs, or someone touched the tabs violently before take-off the FW190 got any probs. Otherwise if in the initial test of a new plane the tabs were ajusted an the plane could be flew without any retrimming.

Offline Karnak

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A luftwaffe question
« Reply #5 on: March 13, 2001, 10:09:00 AM »
To the best of my knowledge, the Spitfire only had Elevator trim and that had to be set on the ground.  There was no "in cockpit" trimming in the Spit.

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Offline juzz

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A luftwaffe question
« Reply #6 on: March 13, 2001, 10:12:00 AM »
Spitfire had adjustable rudder and elevator trim tabs. Aileron trim was set at the factory by bending the ailerons.

The two German fighters had adjustable tailplane incidence. Rudder and aileron trim tabs were fixed and could only be adjusted on the ground.

Glunz

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A luftwaffe question
« Reply #7 on: March 13, 2001, 11:05:00 AM »
There is also another issue, the Kommandogeraet.

Quite a few planes did not enjoy the benefits of such a device.

Offline juzz

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« Reply #8 on: March 13, 2001, 11:53:00 AM »
Yeah, like the Arado...

Offline SageFIN

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A luftwaffe question
« Reply #9 on: March 13, 2001, 12:12:00 PM »
 
Quote
Originally posted by Glunz:
There is also another issue, the Kommandogeraet.

Quite a few planes did not enjoy the benefits of such a device.

Are you implying that planes other than 190 had this device or something in similar too?



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Offline Jigster

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A luftwaffe question
« Reply #10 on: March 13, 2001, 12:21:00 PM »
Keep in mind there nearly every plane had at the minimum, an elevator trim wheel. Most also had rudder trim.

All trim does is keep the stick in a certain position so the pilot doesn't have to apply pressure. For instance, pull back on the stick slightly to set a climb rate. You would then apply elevator trim till the stick remained where you wanted it until you no longer had to hold it there.

It won't increase turn rate by any large means, but it would make it easier on the pilot to pull back because less stick force would be required.

Offline R4M

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A luftwaffe question
« Reply #11 on: March 13, 2001, 12:32:00 PM »
 
Quote
Originally posted by SageFIN:
Are you implying that planes other than 190 had this device or something in similar too?



No, he is implying just the opposite   the Fw190 was the only plane that had this device in WWII.

BTW the Fw190 suffers BIG changes on stability as speed changes fast...I've never said a word because trims are there to be used, but I doubt that the real 190 had so much change of attitudes, given that it was so stable, according with most sources...

 

Offline juzz

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A luftwaffe question
« Reply #12 on: March 13, 2001, 12:37:00 PM »
The Kommandogerat provided control for:

Manifold pressure(MAP)
Engine speed/prop pitch(RPM)
Fuel mixture
Ignition timing
Supercharger gear ratio

All with one "power" lever in the cockpit.

The huge, complex difference with most other planes is that they had one lever each for MAP and RPM, and then the rest of that stuff was automatic, but with manual options too.

Big, fat, hairy deal.

I guess Luftwaffe pilots could only grasp the concept of "push this here lever forward to go fasta" rather than manage their engines in the proper, Allied opportunist, way...  

PS: About Kommandogerat; don't take my word for it, read what the NACA had to say about it here.

Glunz

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A luftwaffe question
« Reply #13 on: March 13, 2001, 02:03:00 PM »
 
Quote
Originally posted by juzz:
I guess Luftwaffe pilots could only grasp the concept of "push this here lever forward to go fasta" rather than manage their engines in the proper, Allied opportunist, way...  



Wrong, LW pilots had to actually pull the lever to go faster.  

Offline juzz

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A luftwaffe question
« Reply #14 on: March 13, 2001, 08:29:00 PM »
See what I mean? They even got that wrong!