New Mossi Performance. Wow.

[SmokinLoon]

Not "wow" as in good, but in dire disappointment.  Im not finding any charts that mimic the speed chart and performance of the new Mossi FB Mk IV.  The previous Mossi had better speed performance!!!  Change it back!!!    

The new flight model is quite nice though.  It is much more smooth in the dive and egress.  Compression is not as much of a widow maker now.   

The new graphics, etc all look great.  Many kudos to Greebo and the others for giving the Mossi and very smooth look.    

[Boozeman]

Not "wow" as in good, but in dire disappointment.  Im not finding any charts that mimic the speed chart and performance of the new Mossi FB Mk IV.  The previous Mossi had better speed performance!!!  Change it back!!!    

The new flight model is quite nice though.  It is much more smooth in the dive and egress.  Compression is not as much of a widow maker now.   

The new graphics, etc all look great.  Many kudos to Greebo and the others for giving the Mossi and very smooth look.    

You should check your numbers again. The new Mossie is 18mph faster at WEP OTD. At MIL 2 mph slower though. Still a good deal.

[SmokinLoon]

You should check your numbers again. The new Mossie is 18mph faster at WEP OTD. At MIL 2 mph slower though. Still a good deal.

I did.  I've been writing down numbers just like you posted in your thread.  So far, I've got stats on near empty fuel w no ammo/ords and fully weighted down for the two models (old vs new).  The differences are not what I expected to see.  Supposedly, the new FB Mk IV has the newer engines.  So with the airframe being lighter and the more powerful engines one could assume... better speeds at MIL?  Not finding any corresponding charts is troubling as well.

[Krusty]

The engines themselves were the same mark. The difference was the engine exhaust setup, so the overall engine package gave more thrust (from the ejector stubs) and thus flew noticably faster.

[Karnak]

I am at work, so I can't comment on the actual game, but the old Mossie's guages displayed data for Merlin 23s or 21s while they had the performance of Merlin 25s with flame dampers.

[Boozeman]

I did.  I've been writing down numbers just like you posted in your thread.  So far, I've got stats on near empty fuel w no ammo/ords and fully weighted down for the two models (old vs new).  The differences are not what I expected to see.  Supposedly, the new FB Mk IV has the newer engines.  So with the airframe being lighter and the more powerful engines one could assume... better speeds at MIL?  Not finding any corresponding charts is troubling as well.

Weight has little influence on speed and the engines have the same power.
The speed decrase at MIL may be a bug, but the increase at WEP is plenty, and should be attributed to the cleaner airframe with no flame dampers.
Even if the decrase in MIL speed is right and proper, I gladly trade that for +18 mph on WEP any day.

[jdbecks]

do props not also effect speed?

[Karnak]

do props not also effect speed?

Props shouldn't have changed.

[Guppy35]

Having never flown a Mossie for real, I can only imagine, but the Cartoon Mossie I flew tonite seemed much more like the ones I've read about.  It can really move.  Always felt slow in the old AH Mossie.  This one felt right.

[Karnak]

do props not also effect speed?

Props shouldn't have changed.

Ok, the props were visually modeled as the toothpick props found on F.Mk IIs and not the paddle bladded props on FB.Mk VIs.  Minor, but would be nice to see it fixed.

[Boozeman]

Well, I have to correct my earlier statement. The engines did indeed change, they have a different altitude behavior than before:

Old Mossie


New Mossie:


Unfortunately the graphs are not the same scale, but the differences are clear.

EDIT:

I manually plotted the old curves into the new graph, just to highlight the differences:


green: old MIL
blue: old WEP

[Krusty]

What's the new FTH alt, where WEP drops off above it? Seems to be noticably higher than 15k.

[Plazus]

What I want to know is, why is there a decrease in MIL power on the new mossie than in the older version? Wouldnt the removal of flame dampers actually increase speed at MIL power? 

[Skuzzy]

Just FYI.  The WEB based comparison utility is not updated yet, so its numbers still reflect the old Mossie.  I am working on it.

[Karnak]

What I want to know is, why is there a decrease in MIL power on the new mossie than in the older version? Wouldnt the removal of flame dampers actually increase speed at MIL power?  

I am still working on a detailed post.  Other than at 5,000ft, MIL speeds are almost exactly the same between the old Mossie and the new Mossie.  Why?  Well, we don't know if the old MIL speeds were based on a dampered or undampered Mosquito, remember, it was a hybrid model.

I am puzzled why the MIL speed of the Mossie is different at 5,000ft though.  I almost suspect a typo in the model is doing it.  Here is what I have so far, for speed tests, all tests done by acceleration to speed, not deceleration, 50% fuel, no ordnance or drop tanks, overload ammo, fuel burn set to 0.001:

100ft:
MIL: New: 319mph  Old: 320mph
WEP: New: 357mph  Old: 338mph

5,000ft:
MIL: New: 334mph  Old: 347mph
WEP: New: 374mph  Old: 363mph

12,000ft:
MIL: New: 361mph  Old: 357mph
WEP: New: 384mph  Old: 376mph

13,000ft:
MIL: New: 363mph  Old: 362mph
WEP: New: 386mph  Old: 380mph