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Fish6891
11-19-2004, 03:46 PM
I've been flying the Dora exclusively, but I've never tried this manual prop pitch stuff. Is it really worth it for a Dora pilot to use manual prop and if so, whats so useful about it and how is it used?

Same question for TA152, FW A9 and A6, and Bf G2 G6/AS and K4

Zen--
11-19-2004, 04:38 PM
I don't think it's worth the effort, much simpler to stay on auto and not over-rev. Having said that, here are the ground rules I use:

Never let RPM go over 3450 or the engine disintigrates within a couple seconds. The tachometer is THE instrument needed to handle maximum pitch (that and engine sound once you get used to it), but maximum RPM is not automatically maximum acceleration.

Never dive with more than 80% pitch.
Zoom climb with 100% pitch.
Level acceleration seems to be best in the 80-85% range.


Engine overheat occurs more rapidly on manual pitch for the Dora as well, so consider that for X amount of incremental performance increase you are shaving a fair amount of engine life off as a tradeoff, with the constant risk of over-rev if you are not careful. For emergencies that may be ok, but generally a D9 pilot needs to think of the longer duration fights rather than the quick kills.

I haven't tested this in 3.0 or 3.01 yet but it will probably hold true. The Ta152 and the D9 both use a Jumo 213 engine, RPM and other factors are the same in my experience.


<S>

Fish6891
11-19-2004, 04:54 PM
Dang Zen, like lightning! Thanks a bunch http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif

Zen--
11-23-2004, 08:42 PM
I was thinking of this earlier today and decided to do some specific acceleration testing for the Dora. The test covers the 44 and 45 models on automatic, 80% manual and 86% manual. (86% manual due to maximum 3450 U/Min limits, 87%+ tended to over-rev engine by exceeding 3500RPM)


The goal for me was to estimate if there was a difference in acceleration between automatic pitch and manual pitch. I don't claim this as the gospel, but as far as I could see from the tests, there was never more than 3-5km/h speed difference at any given point between the 3 modes I tried and surprisingly using automatic pitch gave the best results. No trim was used and the entire mission was flown in real time with no time acceleration. I attempted to keep the plane level but there was an inevitable 2-3m up and down along the way, so variations in km/h might be due to mild porpoising during flight. Topspeed was not tested and overheat was not a factor since time stopped at 2 minutes (although overheat was enabled, the test wasn't long enough to reach it). I wasn't attempting to demonstrate maximum speed, only acceleration to a reasonable end point. Once the Dora got close to it's absolute maximum speed, I decided that was reasonable enough.

Interesting results now here in 3.01, because it wasn't always that way in previous versions of the game. Maybe we have a kommandogerat that works properly now ...or maybe performance is the same as always, but can no longer be exceeded with manual pitch. I make no claim for either actually, but the results surprised me.

Anyway:
Posted here are the completed D9-45 results. For the D9-44, flying is done but I still need to review the track and set the numbers down. I'll do that in a follow up post tomorrow morning. Acceleration times started at 300km/h which is the 0 mark on the test and the raw tracks are available upon request.

Crimea
Noon
50% Fuel
Radiator Closed
110%+MW50
Altitude 5-15m



See revised charts below.

Zen--
11-24-2004, 07:17 AM
http://209.163.147.67/zen/files/zen/charts/FW190D-Acceleration-Data.bmp

Zen--
11-24-2004, 07:53 AM
For comparison with the P47D-27 and the P51D-20NA
(25% fuel, 100% pitch for both)

http://209.163.147.67/zen/files/zen/charts/FW190D-P47-P51-Acceleration-Data.bmp

Zen--
11-24-2004, 06:54 PM
Bumpola for Fish

ZG77_Lignite
11-24-2004, 09:26 PM
Remember the Bf109 series is a completely different system, and might be considered 'harder'. The FW190's use a Constant Speed Prop, much like P51's or La5's. I disagree with most in the operation of the CSP's, however I don't dispute it anymore, as I don't use it so its not fair for me to comment. Historically the FW190 series did not use (or require, barring emergency failures) 'manual' pitch control. In my opinion it is also not necessary in the sim.

TheGozr
11-25-2004, 01:19 AM
Did Zen study his plane or what http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif http://forums.ubi.com/groupee_common/emoticons/icon_wink.gif

Fish6891
11-25-2004, 01:40 AM
Wow, excellent info Zen! This is some pretty useful stuff, I'm gonna copy and paste it to the Focke-Wulf Tactics page.
As always, your help is appreciated http://forums.ubi.com/images/smilies/16x16_smiley-happy.gif

Regards,
Fish
(Wow, the Dora has truly grand acceleration!)

TX-Gunslinger
11-25-2004, 03:29 AM
Awesome Zen, thanks, one less thing for me to have to fiddle with.

Leavin' the transmission in "Drive", and probably saving myself a few wrecks on the highway.

Thank you Fish. Much testing tonite. Posting tommorow.