Huricane Mk I 100 Octane perormance tests 1.07.18301

[TomcatViP]

Originally Posted by ATAG_Dutch

... or the Amazon basin.

Sorry for OT.

Do you mean the basin of an ... ?

[Crumpp]

NzTyphoon says:

As are most of Crumpp's speculative arguments...

There is no speculation. It is facts. It is not my fault folks do not understand the relationship of humidity to density but only focus on a simplistic picture based on what they have learned on a gaming forum.

Why don't you give some facts instead of emotional appeals. Try reason for a change!!

Ohh yeah, because you can't discredit the information with facts and reason. You have no other recourse than emotional appeals.

[NZtyphoon]

Originally Posted by Crumpp

There is no speculation. It is facts. It is not my fault folks do not understand the relationship of humidity to density but only focus on a simplistic picture based on what they have learned on a gaming forum.

Why don't you give some facts instead of emotional appeals. Try reason for a change!!

Ohh yeah, because you can't discredit the information with facts and reason. You have no other recourse than emotional appeals.

I repeat, has Crumpp got any detailed information figures for Britain's atmospheric temperatures and pressures at different altitudes during Summer 1940?

Has Crumpp got detailed readings of the relative humidity for each day of summer 1940?

Nor has Crumpp twigged to the fact that Britain has an Oceanic climate, dominated by the Atlantic ocean, which means that atmospheric air temperatures, humidity and pressure are variable and can change quickly, even at the height of summer:

One reason why the USAAF's pilots and aircrews had so much trouble adapting to Britain's weather conditions was because they had trained in the relatively settled climactic conditions experienced on the continental USA, with mostly clear skies, higher average temperatures and lower humidity than anything experienced in Britain.

Making a blanket statement:

Originally Posted by Crumpp

Why do you think that was not so stunning an improvement in the air?

High density altitude conditions of summer is why!! [/B]

Shows a profound ignorance of how the weather conditions in Britain can change rapidly in the space of a few hours, as others, who actually live there and know this, have been trying to tell Crumpp.

[Crumpp]

The supercharger sees only the pressure

No, the engine see density not pressure.

1. Whenever you include temperature, you are really talking about density.

Temperature correction does not change the FTH in the pressure altitude scale, only the power at the given pressure altitude.

IF the engine is equipped with a density controller. If it has a pressure relief valve, then it is dependent upon density altitude.

If it has an absolute pressure valve or a variable pressure controller then it is subject to density altitude effects.

[MiG-3U]

Originally Posted by Crumpp

No, the engine see density not pressure.

1. Whenever you include temperature, you are really talking about density.




IF the engine is equipped with a density controller. If it has a pressure relief valve, then it is dependent upon density altitude.

If it has an absolute pressure valve or a variable pressure controller then it is subject to density altitude effects.

Well, you are just avoiding the facts here:

1. The engine we are talking here, Merlin (and the US radials in the USAF handbook), keeps constant manifold pressure up to the critical altitude. There are other manifold pressure/density regulating systems but that's another story.

2. The temperature correction does not change the FTH at the pressure altitude scale in these engines. This means that in the density altitude scale the FTH varies according to temperature difference from the standard conditions while the FTH stays constant at the pressure altitude scale.

3. Read the USAF handbook instead waste our time, it's all there. RTFM