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FM/DM threads Everything about FM/DM in CoD

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  #1  
Old 03-30-2011, 06:12 PM
Hunin Hunin is offline
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I can assure you 240 IAS at 18k is not hardly 200 TAS.
More like 325 using the common 2% rule.

EDIT
Easy rule of thumb is "deviation is about 2% each 1000 ft".
In this case: 18*2=36, 240/30=8, 240+80= . . . you get the idea.

EDIT2
Or use bombsight table 2 lol
Probably more convenient.

Last edited by Hunin; 03-30-2011 at 06:25 PM.
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Old 03-30-2011, 06:14 PM
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Moggy Moggy is offline
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If I were doing 240 MPH IAS at 18,000 ft, I'd be pretty happy as I'd be tootling along at 330 MPH TAS. That's according to Bombsight Table 2.

P.S. Flying Pencil, they're both in France (Lille is very close to the Belgian border) and yes...I had to check on google maps!
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Last edited by Moggy; 03-30-2011 at 06:22 PM.
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Old 03-30-2011, 06:21 PM
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Osprey Osprey is offline
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Given the 1C have handed out Spitfire pilot notes books with the collectors edition I imagine that they will have to match whatever settings are in the book.

Boost drops off with altitude so you have to apply more power as you ascend, did you do that??
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Old 03-30-2011, 06:29 PM
Biggs Biggs is offline
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Quote:
Originally Posted by Moggy View Post
If I were doing 240 MPH IAS at 18,000 ft, I'd be pretty happy as I'd be tootling along at 330 MPH TAS. That's according to Bombsight Table 2.
my mistake i was reading the CoD manual wrong... the manual says 225IAS @ 18k is 296TAS... After trying it again Im just hitting 220IAS which would make it more like 290-ish TAS

either way its not what the aircraft should be doing at that alt!.. at spit mkI with a MerlinIII engine with a 2-pitch prop should be doing at least 350 TAS at 18K

this is way off.
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Old 03-30-2011, 06:45 PM
Biggs Biggs is offline
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Now the mkIIa seems spot on...

@18k on full WEP boost (only managed 4lbs at that alt) with the prop at about 2850 revs I was able to hit the 280IAS mark (354TAS) which is what it should be!

the mkI's seem to be off...I'm not sure about their climb rates being off yet but the top speeds are DEFINITELY off.

In summation: mkIa's prop is bugged , there is no added boost when WEP is applied and it wont hit its top speed at alt (18k ft)

Last edited by Biggs; 03-30-2011 at 07:22 PM.
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Old 03-30-2011, 07:03 PM
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good work Biggs
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Old 03-30-2011, 07:16 PM
Biggs Biggs is offline
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Quote:
Originally Posted by fruitbat View Post
good work Biggs
just did another test with the mkIIa and they show (compared against the tests from SpitfirePerformace) that the mkIIa seems to be pretty much spot on for climb rate and top speed. (this plane really is fun to fly)

its the mkI thats off for some reason.

the other thing i noticed is that u cant fly the mkII in anything other than the black and white undersides... which is pretty ironic as is was the EARLIER mkIs that flew in that paint scheme...completely minor issue i know

LUTHIER lets get this mkI issue sorted please!
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