71/2 Minutes at +11 Boost, Spit Ia100oct

[svanen]

Ok, thanks IvanK!

[ATAG_Dutch]

Originally Posted by svanen

Ok, thanks IvanK!

Yep. Thanks for jumping in there Ivan!

[NZtyphoon]

Originally Posted by IvanK

This is the current bug situation with Mixture in CLOD... its a tad complex:

WRT RAF Mixture settings there are multiple issues. Here are the bugs, how it should work. Stick with me here its a tad confusing

In Ver 1.08 the link between the throttle and the mixture lever in that when the throttle is closed it brings the mixture lever back is now correct this is how it was in both the Hurri and the Spits. IRL this means AUTO RICH.

However the Mixture strength going to the engine is operating in reverse in all Hurris and Spits in CLOD at present.

The Correct setup in real life is:
Mixture lever Back Mixture is AUTO RICH
Mixture Lever Forward Mixture is AUTO LEAN
There were only 2 positions Forward or Back
In Both AUTO RICH or AUTO LEAN compensation for altitude is automatic.
The only real difference between AUTO RICH and AUTO LEAN is each is running a slightly different mixture strength schedule. One suitable for General and all power settings (AUTO RICH) and the other for range/endurance flying at low power settings (AUTO LEAN)

You only really need to run AUTO LEAN if you are really trying to minimise fuel consumption. Anytime you are running AUTO LEAN there are max boost limitations to be adhered to or engine damage will result. (+2.25Lbs Merlin II and III and +4Lbs Merlin XII). Max power and or Boost Cutout operation at 12LBS must have Mixture in AUTO RICH.

VER1.08 IN COD MIXTURE BUGS
MIXTURE LEVER BACK is giving LEAN MIXTURE WRONG
MIXTURE LEVER FORWARD is Giving RICH MIXTURE WRONG
Lever has infinite movement WRONG it should be 2 position only.
MIXTURE LEVER is not working in any AUTO function since passing around 12,000ft you need to select LEAN to get smooth operation. This is WRONG as AUTO RICH should automatically compensate for altitude.

VER1.08 Workarounds
You will get better cooling using RICH MIXTURE .. it helps on the climb in the Spit IIA especially (though its still out of wack). On take off once full throttle is selected push the mixture lever fully forward to the RICH (WRONG POSITION IN VER 1.08 ) Passing around 12,000ft you will start to get rough engine operation so pull the lever back to the LEAN (WRONG POSITION IN VER 1.08 ) If Activating BOOST CUT OUT you must be in RICH so push the lever forward (WRONG POSITION IN VER1.08 )to RICH .... if you don't you will get rough running and engine damage.

HOW IT SHOULD BE USED IRL
In Reality all you really need to do is just leave the Mixture in the rear position in AUTO RICH and forget about it. You then have Automatic Altitude compensation, No BOOST limitation restrictions, no issues with the throttle moving the mixture lever just go fly.

All of this has been communicated to the Devs ... we now wait for the fix.

Nice one Ivan! in spite of the complexity this is a model of clarity.

[ATAG_Dutch]

Originally Posted by NZtyphoon

Nice one Ivan! in spite of the complexity this is a model of clarity.

It certainly is. Half of the problem with the current RAF fighters is the incorrect mixture modelling, the other half appears to be connected with the way drag is modelled in the radiators.

In my opinion, if these two issues were addressed, many of the FM complaints would evaporate.

Here's hoping for a rectification of both issues in the 'release candidate'.

[JG52Krupi]

I also hope the sound radar is removed and a fully animated cockpit is added I.e. trim wheels etc.

[ATAG_Dutch]

Originally Posted by JG52Krupi

I also hope the sound radar is removed and a fully animated cockpit is added I.e. trim wheels etc.

Agree on sound radar, but there is something very atmospheric about approaching a bomber formation and hearing the thunder of their collective engines, so it's not all bad.

Animated cockpit doesn't worry me any where near as much as the mixture and drag though. Plus in programming terms, altering a + to a - and reducing a numeric factor in a calculation would take minutes. Modelling cockpit animations a little longer I think. I'm oversimplifying there of course but I'm sure you understand where I'm coming from.

[ATAG_Dutch]

Just to update the info a touch:

Instead of testing, I've been flying for fun over the last few days and found an even simpler solution for the 100oct settings.

Before take-off, again set rad at 50% and leave it there. Mixture lever fully back. Take-off at 3000rpm, gear up, level off and allow airspeed to build to 185mph. Drop to +3 boost, lower revs to 2400 and forget them. Leave them there.

Throttle back up to +6 boost. By now you'll be doing about 200mph on the flat. Turn towards the sun and climb (never climb away from the sun, you never know who's watching). You'll get a climb rate of initially over 3000fpm dropping to 2500fpm as speed drops to 185mph. Trim for climb at this speed.

As you hit around 12,000ft you'll see temps start to rise. Throttle back to +5 boost, or level off a bit to increase airspeed. This will keep things cool. Twiddle mixture a bit to ensure blue flame.

Go jerry hunting.

Above 14,000ft, emergency boost doesn't give any real benefits, so leaving engine at these +5 to +6/2400/mixture back settings will give good performance against 109s. BUT!! If they dive away (as they tend to), punch the emergency boost, firewall it and set mixture full forward, as it certainly does work the lower you go.

With the +11boost/2400rpm/mixture forward/50% rad settings the 109s will get the shock of their lives. Just don't be tempted to alter either pitch or rad settings.

This doesn't mean that the devs don't need to change some things, but we shall see.

Stick to these golden rules and the current 100oct is very competitive.

[Momod]

Nice work Dutch,
I also found the 2400 RPM settings to be ideal for climbing out etc, but on some occasions that I have increased revs or used boost and forgot to keep a close eye on the temps the inevitable happens and its RTB with a damaged engine. There are some other good pointers you have posted as well and I`ll be certainly try them out later
~S~ 56RAF Rumba

[ATAG_Dutch]

P.S. If a 109 climbs vertically, do not follow. You will lose too much airspeed and your engine will overheat.

Instead, circle and maintain your airspeed at your current altitude. Eventually he will come down, at a much slower speed than you. Use the superior manoeuvrabilty of the Spit plus the above settings to get on his six and shred him.

I now ask for a bar to my DFC.

[trademe900]

Originally Posted by ATAG_Dutch

P.S. If a 109 climbs vertically, do not follow. You will lose too much airspeed and your engine will overheat.

Instead, circle and maintain your airspeed at your current altitude. Eventually he will come down, at a much slower speed than you. Use the superior manoeuvrabilty of the Spit plus the above settings to get on his six and shred him.

I now ask for a bar to my DFC.

Not enough.

He will just come down for a pass on you after his climb and then accelerate up and away again while you circle helplessly beneath him...