Friday 2010-12-10 Dev. video update and Discussion

Originally Posted by T}{OR

First I would like to say how much I envy you for the described experience. I am much more into theory, calculations and various physic laws related to engines. Unfortunately I have very little time with real engines. I did say 'probably' more variable, so this means that someone who is also an engineer and has the experience should have to come here and verify this in practice.

I am though, more inclined to believe that this difference in flames is almost invisible or not noticeable when comparing them with fuel injected engines of the same era (see my reply to W32Blaster below).

it's a dirty business, hands always covered in grease, oil and cuts, but when you feel 1650HP growling in your guts, swinging that big propeller 10ft in front of you, 12 cylinders furiously roaring in all their power.. well it's well worth the dirty hands

..The truth is that I like physics but I've always been rubbish in maths (I always lose a + or a - somewhere..).. LOL

[wildone_106]

Looks guys we want them to ship the game this decade..with all these inane requests it will never get done. You just gotta realize in the end its a simulation game..not real life. Once you come to terms with that your mind will rest...

[T}{OR]

Originally Posted by Sternjaeger

it's a dirty business, hands always covered in grease, oil and cuts, but when you feel 1650HP growling in your guts, swinging that big propeller 10ft in front of you, 12 cylinders furiously roaring in all their power.. well it's well worth the dirty hands

..The truth is that I like physics but I've always been rubbish in maths (I always lose a + or a - somewhere..).. LOL

Now you're just talking dirty...

For me it is the other way around - I was always better in maths than in physics, but loosing a '+' or '-' is not strange to me either.



@ wildone & pencon: What we have been discussing here on last two pages are basics (of basics) of how internal combustion engines work. The mere fact that Oleg is considering to implement something like variable exhaust flames dependent on the mixture ratio is mind boggling. Let alone the individual cylinder modeling that has already been confirmed. Simply phenomenal work Oleg & co.


Before this gets more OT I will get back to the subject...

I wonder if the proper firing order has been simulated as well? Judging by the amount of details already shown, I would be surprised if it wasn't.

[ElAurens]

Originally Posted by Sternjaeger

it's a dirty business, hands always covered in grease, oil and cuts, but when you feel 1650HP growling in your guts, swinging that big propeller 10ft in front of you, 12 cylinders furiously roaring in all their power.. well it's well worth the dirty hands

..The truth is that I like physics but I've always been rubbish in maths (I always lose a + or a - somewhere..).. LOL

Never been into an aero engine, but I work on lots of old stuff. Everything from a Model T Ford to E-type Jaguars and a Lotus 11 LeMans.

Actually, driving the very early cars has much in common with early aircraft. The carbs are very rudimentary, as are all the other systems. They require constant input from the operator to be at their peak. Every gross change in throttle setting demands a change in mixture and spark advance, and it all changes as the engine warms. The settings you left the shop with will not be the settings you come back with.

It's a type of driving I really enjoy as it requires actual thought and input.

[Azimech]

Originally Posted by W32Blaster

Let´s say youll have a Pierburg 4A1 Carburator with ECU for fully closed loop control of a 3-Way Katalyst System and you compare it with a early k-Jet-Tronic, guess which one is more sophisticated in terms of providing right mixture for all operational state.

Ah, I thought we were comparing WW2 carbs with WW2 mechanical injection. Because the Pierburg would probably have a hard time compared with Bosch Motronic, itself already 25 years old. K-Jetronic is very simple indeed.

[T}{OR]

Originally Posted by Azimech

Ah, I thought we were comparing WW2 carbs with WW2 mechanical injection. Because the Pierburg would probably have a hard time compared with Bosch Motronic, itself already 25 years old. K-Jetronic is very simple indeed.

True. We should compare the same engines of the era. I've updated my reply two pages back.

Thor, I used the 50/50 expression cos you mentioned "half and half", sorry, nothing really technical there

I have a fair experience with aviation piston engines (I was lucky enough to fiddle with 2 strokes and 4 strokes Rotax, Gypsy Major, Continental, Lycoming, P&W Wasp and lately I started to get acquainted with the RR Packard Merlin), but I am no engineer or techie, I am just a flier who's interested in knowing what's happening under the bonnet in front of his nose..

I am not entering in the merits of lambdas or mixture ratios because they're peculiar to the engines and aeroplanes (and as you said 100 posts wouldn't be enough), all I can tell you though is that yes, in theory a direct injected engine like the DB could be more "mixture efficient", although carb engines are handled according to strict parameters, so you would hardly notice any difference in the flames colouring.. if Oleg managed to implement a flame colour changing according to mixture values then this would be a boomer, cos we'd be able to adjust our mixtures by looking at the exhausts and might also be able do diagnose engine problems (i.e. red exhaust flames and sparks coming out would mean a bad, bad day.. or in case of radial engines, where the exhausts are normally connected via a ring exhaust, an intermittent flame from the main exhaust would mean misfiring cylinders etc..).

Come on Oleg, this is quality material we're delivering you here!

[Oleg Maddox]

Originally Posted by Sternjaeger

if Oleg managed to implement a flame colour changing according to mixture values then this would be a boomer, cos we'd be able to adjust our mixtures by looking at the exhausts and might also be able do diagnose engine problems (i.e. red exhaust flames and sparks coming out would mean a bad, bad day.. or in case of radial engines, where the exhausts are normally connected via a ring exhaust, an intermittent flame from the main exhaust would mean misfiring cylinders etc..).

Come on Oleg, this is quality material we're delivering you here!

It is our target. Will be or not - we will see. We have a lot of such branched targets that should be done. Some are hight priority, some - not due to time that it may cost.

Originally Posted by Oleg Maddox

It is our target. Will be or not - we will see. We have a lot of such branched targets that should be done. Some are hight priority, some - not due to time that it may cost.

Oleg, dear old friend Oleg, if your next project was to put wings on a lawnmower I would still buy it!
You guys at Maddox delivered quality, and I know you won't ever let us down, keep up the good work guys!

[ATAG_Dutch]

Originally Posted by Oleg Maddox

It is our target. Will be or not - we will see. We have a lot of such branched targets that should be done. Some are hight priority, some - not due to time that it may cost.

Sorry Mr Maddox, but does that mean that you'll take the members advice and make exhaust flames blue?
As there is no evidence at all for yellow flames?
Thanks.