can not start engine

No, it cannot be true, that priming does not work while not turning the engine/propeller, otherwise you could not start by that method, which you can. I did it just the other day.

Unless something has changed again in the latest 1.5.3 OB, You could prime any effin' number of seconds You wanted, from one to infinity, and then the engine would not start on the first try...

...unless You hit primer switch again while it was already turning, or unless You cranked it a few blades before doing anything else (case b) ).

Haven't flown the bird in either latest OB or latest 2.0.2, so I'll happily do some testing today.

I thought I read on a post here that the reason for rotating prop first before primer was to simulate the ground crew turning the blades before you crank. Not exactly perfect simulation but a try towards it.

Unless something has changed again in the latest 1.5.3 OB, You could prime any effin' number of seconds You wanted, from one to infinity, and then the engine would not start on the first try...

 

...unless You hit primer switch again while it was already turning, or unless You cranked it a few blades before doing anything else (case b) ).

 

Haven't flown the bird in either latest OB or latest 2.0.2, so I'll happily do some testing today.

I honestly don't remember how well priming before starting worked in 1.2, because I've been priming while starting since before 1.5 :smilewink:

While playing around with it yesterday I discovered something new. Try priming before hitting the starter, and after a few seconds of turning the engine, hit RUN on the fuel mixture. Very interesting :D.

I thought I read on a post here that the reason for rotating prop first before primer was to simulate the ground crew turning the blades before you crank. Not exactly perfect simulation but a try towards it.

I honestly don't know if the ground crews were actually turning the prop manually on the Merlin, but yes, the idea is to move the engine through at least one full cycle to lubricate all the baring surfaces without any operational stress, before starting. This greatly reduces the Wear-n-Tear™ on the bearings.

I found out you do not need to prime the engine anymore, just magnetos on before your turning over the engine and after 3-5 second set fuel to run and it fires up, i guess it should no be that "easy" to fire that thing up... they should look in to this