Official Fulqrum Publishing forum - Speed graphs for Spitfire and Hurricane

Official Fulqrum Publishing forum (http://forum.fulqrumpublishing.com/index.php)

- IL-2 Sturmovik: Cliffs of Dover (http://forum.fulqrumpublishing.com/forumdisplay.php?f=189)

- - Speed graphs for Spitfire and Hurricane (http://forum.fulqrumpublishing.com/showthread.php?t=31450)

Quote:

Originally Posted by camber (Post 420209)

Well, my beta patch gives me CTDs within 5 mins of taking off in ATAG MP. 50% of people chatting seem to be in the same boat, whereas the other 50% are totally CTD cured for hours on end. Go figure :)

So what else to do but go single player, turn off the cockpit and get SL speeds for the patch?

Technique: skim waves, centre ball, settle as close as possible to 0fpm. As noted above the tool tip in cockpit view does not agree with the cockpit guage (possibly it rounds down to nearest 10mph?), all these speeds are based on the guage in no cockpit view.

My SL speeds and observations:

Spit II
275-280mph 3000rpm full throttle (~6.25psi boost)
290-295mph 3000rpm full throttle red tab (~9psi boost)

rpm boost quirk (drop in rpm increases boost) is gone, boost stays constant with rpm. Dropping rpm to 2600rpm does not lead to speed increase any more

Spit Ia

255-260 mph 3000rpm full throttle (~6.25psi boost)

As per Spit II, rpm boost quirk is gone (boost constant with rpm), and dropping rpm now does not increase speed. Boost cut out still does nothing.

Rotol Hurri

240-245mph 3000rpm full throttle (~5.25psi boost)

Boost quirk is still there for the Hurri, i.e boost increases to approx correct value (+6.25 psi) only if rpm dropped to 2600rpm. However unlike before, this does not increase speed.

109E4
with prop auto at 2300rpm only
450-460kmh (280-286mph) at 1.35ata
460-470kmh (286-292mph) at 1.45ata

On the bright side, E4/Spit II matchup may be rather "balanced" with max SL speeds almost identical. Both Spit Ia and Rotol Hurri are now "I like a challenge" only planes :)

camber

I think you're right about the tooltip and I removed that from my post but we can't get those speeds on line :(

I was read the cockpit gauge. But there could be simple texture mapping errors. I think we should standardize on use of no-cockpit-view gauges for test flights.

Quote:

Originally Posted by klem (Post 420219)

I think you're right about the tooltip and I removed that from my post but we can't get those speeds on line :(

Hmmm, is it possible that there is a difference between offline and online performance of aircraft in Cliffs of Dover? I was unable to achieve (online) the values that Camber did offline.

EDIT: Just did some testing of the Spitfire Ia and IIa offline and online (ATAG Server). Looks like there may be a different curve for the Spitfire IIa between online and offline flying. This might explain the difference between what Camber recorded and what is happening online. Please ignore the A2A data -- apples to oranges to Cliffs of Dover.

http://theairtacticalassaultgroup.co...2238#post12238

@BlackSix: Why does the Spitfire Mark IIa fly so differently offline vs online? Per my findings on #6 post at http://theairtacticalassaultgroup.co...2238#post12238

Quote:

Originally Posted by ATAG_Snapper (Post 420507)

@BlackSix: Why does the Spitfire Mark IIa fly so differently offline vs online? Per my findings on #6 post at http://theairtacticalassaultgroup.co...2238#post12238

It might help if you reupload the file to this forum or somewhere the devs dont have to sign up to read (as I assume they wont bother).

Quote:

Originally Posted by GraveyardJimmy (Post 420508)

It might help if you reupload the file to this forum or somewhere the devs dont have to sign up to read (as I assume they wont bother).

I tried Jimmy -- the pdf file exceeds the minimal 19 kb limit set by 1C. I'll see if there isn't another format I can use that will be accepted by this forum.

I have to think that if a dev can't be bothered checking into the forum of one of the busiest Cliffs of Dover servers.....then they'll hardly be bothered looking at a chart....:rolleyes:

Another interesting test to perform with the Spits is maximum speed in a dive.

It's difficult to get over 400mph, even from 15,000ft in a vertical dive, and if you force it to 420mph, your ailerons and rudder fall off. This is in the Ia and IIa, the MkI seems more resilient, but still no more speed IIRC.

Although any speed trial is difficult at the moment with the over-sensitive/non-functioning throttle control.

I have noted the same during my roll rate tests with the Mk II, its very hard to reach 400 mph. This was before the beta patch.

Quote:

Originally Posted by ATAG_Snapper (Post 420517)

Screen shot it and post as .jpg

Quote:

Originally Posted by klem (Post 420555)

Screen shot it and post as .jpg

That works! :grin: