Radiator/cowling flaps

[palidian]

Originally Posted by Crumpp

It is not uncommon to rate aircraft engine settings in percentage power.

If you take a look at the airplane manuals, they show a throttle lever, this lever has a wide range to slide around. Theses are not the throttle of WWI aircraft that have on, idle and off settings.

[fruitbat]

Originally Posted by palidian

If you take a look at the airplane manuals, they show a throttle lever, this lever has a wide range to slide around. Theses are not the throttle of WWI aircraft that have on, idle and off settings.

I've never seen a WWII pilots notes that hasn't show Boost/manifold pressure/ATA with rpm for a power setting.

Never ever seen a percent.

from one of the random ones i have on my hard drive, Spit Mk IX,



Distinct lack of percent.....

[Crumpp]

[fruitbat]

well, i won't argue with that chart, but funnily enough, still shows manifold pressure and rpm, which wait, let me see are the gauges the pilot actually uses, lol.

Oh, and of course those percents are actually the hp available in relation to the 100% power setting, at the other different manifold pressure/rpm settings listed, but thanks for the chart...

[palidian]

Originally Posted by fruitbat

well, i won't argue with that chart, but funnily enough, still shows manifold pressure and rpm, which wait, let me see are the gauges the pilot actually uses, lol.

Oh, and of course those percents are only the hp available in relation to the 100% power at those different manifold pressure/rpm settings, as opposed to a just a throttle setting, since you need to change the pitch to get the rpms to acheive that, but thanks for the chart...

Manifold pressure is an indicator of the supercharger, and when to change gears. The higher the altitude the less the pressure you will get. At a certain point you will shift blower gears.

[Crumpp]

100% power

If you notice, that is always the maximum continuous rating.

It is not uncommon to see power rating that exceed that maximum continuous and in the case of the Allison V-1710 we can see there are two such ratings which exceed the 100% power capacity of the engine.

Of course exceeding that 100% power capacity represents an overloaded condition on the engine.

[palidian]

Originally Posted by fruitbat

I've never seen a WWII pilots notes that hasn't show Boost/manifold pressure/ATA with rpm for a power setting.

Never ever seen a percent.

from one of the random ones i have on my hard drive, Spit Mk IX,



Distinct lack of percent.....

It is pretty easy, the throttle lever pulled all the way back is idle, push it all the way forward it is at 100%, place it in between the two, and its at 50%. Push it all the way forward and breaking the stop, its in WEP. Your car does not have a throttle percentage indicator, but you somehow know when your foot is pressing on the pedal all the way not not.