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FM/DM threads Everything about FM/DM in CoD |
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#1
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Yeah right, it says "C.G Diagram" in nice big letters at the bottom so people who can read understand it has nothing to do with the centre of gravity of Spitfire Mk Is. NACA report Measurements of the Flying Characteristics of the Spitfire Va: As per usual Crumpp has fudged what the report actually says: Quote:
![]() ![]() Last edited by NZtyphoon; 05-12-2012 at 01:41 PM. |
#2
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More selective quoting and speculation.
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Il-2Bugtracker: Feature #200: Missing 100 octane subtypes of Bf 109E and Bf 110C http://www.il2bugtracker.com/issues/200 Il-2Bugtracker: Bug #415: Spitfire Mk I, Ia, and Mk II: Stability and Control http://www.il2bugtracker.com/issues/415 Kurfürst - Your resource site on Bf 109 performance! http://kurfurst.org ![]() |
#3
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Quoting from the tests of the Spitfire I K.9789:
http://www.spitfireperformance.com/k9787-fuel.html 2. Handling and Flying Qualities. The aeroplane has been flown at the following loadings and positions of gravity:- Load for Weight (lb.) C.G. Position (inches aft of datum) Typical service load ---5819---7.7 Extended aft.---5819---8.6 Forward limit---5338---5.8 ... (v) Stability - The aircraft is laterally stable at all speeds except in the immediate vicinity of the stall when it is unstable. The aircraft is directionally stable engine 'OFF' and 'ON' at all speeds, but on the climb this is difficult to assess owing to insufficient rudder bias. Longitudinally, the aircraft is stable with centre of gravity forward, but is unstable with centre of gravity normal and aft with engine 'OFF' and 'ON'. Longitudinal stability records are attached. Later limits for the Spitfire 1A & 1B without and with the elevator inertia device (bob weigh): http://target4today.co.uk/_posted_im...11/CoG_Iab.jpg 3 With original standard elevator Elevator inertia device---NIL---3.5 lb.---6.5 lb. with De Havilland propellers--- 7.9 in.---8.2 in.---8.6 in. with Rotol propellers---7.5 in.---7.8 in.---8.2 in. With the Rotol propeller (as was in the Spitfire II and NACA tested Spitfire VA), the typical service load CG of the K.9787 was beyond the later limits without the inertia device (7.7 in. vs. 7.5 in limit). The extended aft CG of the K.9787, 8.6 in. aft the datum point, was clearly beyond the later limit, 8.2 in. even with the heavier 6.5 lb. weigh in the inertia device (with Rotol propeller). RAE on the NACA stability testing posted by lane: http://forum.1cpublishing.eu/showpos...&postcount=175 2.2. Stability and control at medium and low speeds. This was covered admirably, with the exception of static longitudinal stability. Trim at two C.G. positions were not done, so that the neutral points remained undetermined. NACA did not test stability at different CG positions and, as NZtyphoon noted, they had no documentation about the correct CG limits nor accurate drawings. Over and out ![]() |
#4
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All this writing, or better copy 'n pasting, doesn't change the fact that the stick forces and stick travel for the elevator control in the early marks of the spitfire were too low and that has been changed in the later marks with the "BoB-weights".
If the low forces in connection with the small travel weren't regarded as dangerous, no change would have been necessary!
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#5
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Intel Q9550 @3.3ghz(OC), Asus rampage extreme MOBO, Nvidia GTX470 1.2Gb Vram, 8Gb DDR3 Ram, Win 7 64bit ultimate edition |
#6
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And the rest of your opinion is grasping for straws, imo.
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Win 7/64 Ult.; Phenom II X6 1100T; ASUS Crosshair IV; 16 GB DDR3/1600 Corsair; ASUS EAH6950/2GB; Logitech G940 & the usual suspects ![]() |
#7
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Intel Q9550 @3.3ghz(OC), Asus rampage extreme MOBO, Nvidia GTX470 1.2Gb Vram, 8Gb DDR3 Ram, Win 7 64bit ultimate edition |
#8
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Some pilots had the slats were wired shut, but that was the exception not the rule.
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#9
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Yes I just realised I meant disabled instead of 'removed', also it was an idea theorised by the americans on how the 109 might be improved after tests on captured aircraft.
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Intel Q9550 @3.3ghz(OC), Asus rampage extreme MOBO, Nvidia GTX470 1.2Gb Vram, 8Gb DDR3 Ram, Win 7 64bit ultimate edition |
#10
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Last edited by NZtyphoon; 05-13-2012 at 12:13 AM. |
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