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#1
06-05-2012, 07:36 AM
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A note about the test method. I think it would be possible to get the top speed by measuring the movement of the aircraft over the ground by a mission script.
About the test result. It just makes me sad but to be honest it doesn't surprise me at all. Could you do 2 reference values with "emergency boost" at see level and one at FTH? Out of curiosity, was there are large difference between the 3 test runs? Last edited by 41Sqn_Banks; 06-05-2012 at 07:59 AM. |
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#2
06-05-2012, 08:53 AM
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there was very little diff on each run in the order of +- 2Mph max IAS as far as I could interpolate on the ASI. Each run was flown like a precision Instrument Flying exercise.... actually better than the +-50ft tolerance I quoted.
I will do some runs as requested with Boost cutout as well. Same for the Hurricane test which I have just posted as well. Distance covered over the ground would provide Ground Speed. Working back to get TAS might be an issue as we really dont know the atmospheric model. I know the QNH is accurate but the base Sea level temperature is based on OAT with a static observation of the OAT gauge. In other tests at various altitudes in climb and descent (I was trying to map the lapse rates used in the CLOD atmosphere) I was getting some very strange OAT values ... to the point I gave up. Last edited by IvanK; 06-05-2012 at 08:58 AM. |
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#3
06-05-2012, 09:31 AM
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Same Basic Mission.
Spit IIA Sea Level Boost Cutout activated 3000RPM Boost indicates Full scale deflection I achieved 285IAS/287TAS At 15,000ft which is the CLOD +6.25 FTH (with RAM) with boost Cutout activated Boost remained at +6.25Lbs I achieved 258IAS/328TAS Dropping down to 12,000feet which is where with Boost Cut out the Boost starts to drop from Full scale deflection (+ 8 ) I achieved 267IAS/323 TAS ... same as with out Boost cutout. Last edited by IvanK; 06-05-2012 at 11:21 AM. |
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#4
06-05-2012, 11:10 AM
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Concur.
My test scores (post patch) from previous thread: Spit IIa FTH = 13500 ft (?!) at 6.25psi, 2750rpm (rad open) engine fails after about 3 mins 260mph IAS@13500 = 328mph TAS = 528 kmh TAS Pretty much exactly as yours for 14000 ft. Except your engine seems to stay a bit cooler and my merlin a bit more fragile 
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