No need to prime engine

[wolfstriked]

Forgot quite a few times to prime engines as I am now relearning P51 engine startup procedure and it starts up just fine with never priming engine at all.

[grafspee]

i will add another issue whne you move mixture control to iddle cut off engien when slowing down magicly coming to life again at around 200rpm than cut off again than coming back to life again over and over some time it take many seconds before engine stops completly

[hazzer]

Been like it for ages, same with the spitfire

[Nealius]

Same for the Bf 109 and Yak-52 as well.

[grafspee]

i dont think so that you need to prime bf109 it has direct fuel injection same fw190d-9

[Ala13_ManOWar]

Bf109 IS primed as a matter of fact, despite two different fuel pumps it's needed and will never start unless well primed. Fw190 just have a different engine and fuel system.

 

About the P-51 engine running without priming I wouldn't speak as I have not flown the P-51 for a time and I don't know the latter (Beta) patch state. But the stop feature you describe is just that, a feature. Fuel lines in usual aircraft are really long compared to say a car and once mixture is cut off it takes a time for them to become empty and so for the engine to stop.

 

S!

Edited March 28, 2019 by Ala13_ManOWar

[grafspee]

Bf109 IS primed as a matter of fact, despite two different fuel pumps it's needed and will never start unless well primed. Fw190 just have a different engine and fuel system.

 

About the P-51 engine running without priming I wouldn't speak as I have not flown the P-51 for a time and I don't know the latter (Beta) patch state. But the stop feature you describe is just that, a feature. Fuel lines in usual aircraft are really long compared to say a car and once mixture is cut off it takes a time for them to become empty and so for the engine to stop.

 

S!

 

priming is inducting fuel in to engine intake in order bypass main fuel distribution system in case p-51 spitfire carb is mounted at the begin of intake system so there is very long way for fuel to actualy get to the cylinger (carb->1st supercharger stage ->intercooler -> 2nd supercharger -> intake manifold-> cylinders(i think p-51 had intercooler and spit had aftercooler but not sure)) preaty long way in bf109 fuel is inducted directly to cylinder. Priming job is also give time to evaporate since in very cold condition evaporation may be not sufficient to happen but DFI has a lot less need of prime then carb solution.

i watched on my own eyes how merlin coming to stop there is no sudden burst of ignitions when engine is just about to make stop.(there is hundreds of movies showing p-51 or spit shuting off and not a single one doing this)(and it is easy to notice that after pilot movie Mixture to cut off engine still working fine for a split second so there is a delay)

Ofc fuel volume behind shut off valve will be burned by engine sure and that is comming next bug that engine imidietly reacting to cut of valve imo after moving handle to cut off engien should work fine for a second meby little longer then it shoudl start to make miss fires on certain cylinders then comming co complete stop not oposite way like in dcs right now.

i know that FW190 d-9 has difrent engine but fuel system is almost the same direct fuel injection.

Edited April 2, 2019 by grafspee

[Ala13_ManOWar]

Yeah, and I have seen engines IRL not stopping at all even with mixture off. It depends on many aspects and today's Warbirds not always meet the WWII standard with their brand new spare parts and sometimes even modifications to enhance the engine work.

 

 

S!

[grafspee]

Yeah, and I have seen engines IRL not stopping at all even with mixture off. It depends on many aspects and today's Warbirds not always meet the WWII standard with their brand new spare parts and sometimes even modifications to enhance the engine work.

 

 

S!

 

maby that's case but why still engine reacting instantly to fuel cut off ?? we cant explain that this way, that something is wonky in the engine quite oposite scenarions in one engine stoping very very long and another hand fuel cut off works so great that engien cuts off instantly

i dont mind engine keep working for a couple seconds after setting idde cut off it would be very nice if it would do that but why engien cuts off imidietly and then at around 200rpm and this is constant rpme value when engien comes to life agian this is not definetly modeled properly there is something wonky ther for sure. i would say that some one is priming engine just about come to stop just to trol pilot :P

in case of bf109 and fw190 fuel cut off would be instantious and permament if everythign is in good shape

Edited March 28, 2019 by grafspee