D.VIIF Knock in Winter at Sea Level

[6./ZG26_Klaus_Mann]

From my Limited Engine Knowledge, shouldn't Colder Intake Air reduce Knock Tendency at Sea Level? So if the Engine is tuned for Autumn's 15°C and for the Climbing Condition of about 120km/h, flying slower than that at Full Throttle should result in higher Risk of Knock, while flying Straight should allow you to crack it open just slightly. This mostly due to Heat dissipation from the Cylinder Heads being better at high than at Low Speeds. 

 

Flying with that Tune in Summer at 25°C and hotter shouldn't allow you to open the Regular Throttle fully without knock, as the intake Air is now so Warm. It would only be possible to be fully opened in Top Speed and Straight Flight. On the Plus Side the Engine will give you a considerably larger Performance Advantage over Non-Overcompressed Engines, as the Critical Alitude at which the Höhengas can be fully opened, is now Pushed Upwards Considerably, giving you an even bigger Edge over the Enemy.

 

In Winter it's the Opposite, and in the Russian Winter the Intake Air would be so freezing Cold, you should be able to Run with both Throttles fully open under all Conditions. 

[HiIIBiIIy]

No, colder air is denser causing a greater air to fuel mix.

[ZachariasX]

22 hours ago, 6./ZG26_Klaus_Mann said:

From my Limited Engine Knowledge, shouldn't Colder Intake Air reduce Knock Tendency at Sea Level?

HillBilly is right. The D.VIIF still uses an aspirated engine, not like it would on turbocharged/supercharged engines that can still achieve a similar desitiy (at higher temperature) than aspirated engines. In the D.VII you really have less air (and fuel) in the cylinder at higher temps. That is easier to compress in the cylinder.